* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Folie 1 - uni
Climatic Research Unit email controversy wikipedia , lookup
Intergovernmental Panel on Climate Change wikipedia , lookup
Heaven and Earth (book) wikipedia , lookup
ExxonMobil climate change controversy wikipedia , lookup
Michael E. Mann wikipedia , lookup
Climate resilience wikipedia , lookup
Climate change denial wikipedia , lookup
Numerical weather prediction wikipedia , lookup
Global warming controversy wikipedia , lookup
Fred Singer wikipedia , lookup
Climate change adaptation wikipedia , lookup
Citizens' Climate Lobby wikipedia , lookup
Climate engineering wikipedia , lookup
Soon and Baliunas controversy wikipedia , lookup
Climate governance wikipedia , lookup
Climatic Research Unit documents wikipedia , lookup
Effects of global warming on human health wikipedia , lookup
Politics of global warming wikipedia , lookup
Economics of global warming wikipedia , lookup
Future sea level wikipedia , lookup
Climate change in Saskatchewan wikipedia , lookup
Media coverage of global warming wikipedia , lookup
Atmospheric model wikipedia , lookup
Global warming hiatus wikipedia , lookup
Instrumental temperature record wikipedia , lookup
Climate sensitivity wikipedia , lookup
Solar radiation management wikipedia , lookup
Climate change and agriculture wikipedia , lookup
Climate change in Tuvalu wikipedia , lookup
Scientific opinion on climate change wikipedia , lookup
Global Energy and Water Cycle Experiment wikipedia , lookup
Global warming wikipedia , lookup
Climate change and poverty wikipedia , lookup
Climate change in the United States wikipedia , lookup
Public opinion on global warming wikipedia , lookup
Attribution of recent climate change wikipedia , lookup
Effects of global warming on humans wikipedia , lookup
Climate change feedback wikipedia , lookup
Surveys of scientists' views on climate change wikipedia , lookup
Climate change, industry and society wikipedia , lookup
2.34 2.34 Modelle 2.341 Ein einfaches Energiebilanz Modell (EBM) 2.342 Komplexere Modele 2.343 Virtueller Gastvortrag von Prof. Broccoli, USA: Atmospheric General Circulation Modeling Coupled General Circulation Modeling 2.344 Übersicht über komplexere Modelle GHG= Greenhouse Gas Hauruck Modell für mittlere Temperatur der Erdoberfläche 1. Parameter Stefan-BoltzmannKonstante Emissionsfaktor Solare Einstrahlung auf m^2 Kugeloberfläche direkte Rückstrahlung, Albedo absorbierte Solarstrahlung Goto spielen sigma= 5,7E-08 [W/m^2/K^4] eps= 1,00 S0= E0= A= E= 1370 [W/m^2] 342,5 [W/m^2] =S0 / 4 0,30 [W/m^2] 239,8 [W/m^2] = (1 - A ) * E0 2.Stefan Boltzmann Gesetz für schwarzen Körper: P = sigma *( T 1^4 - T 2^4 ) P = sigma *T 1^4 sofern T2 --> 0 T 1 = Wurzel(Wurzel(P/sigma)) 3. Stefan Boltzmann Gesetz für graue Körper: sei T 2 = 0 --> P = eps * sigma *(T 1^4 - T 2^4) T 1 = Wurzel(Wurzel(P/ (eps*sigma))) 5. Strahlungsgleichgewicht: Absorption solar = thermische i.r. Ausstrahlung der grauen Erde Gleichgewicht: P=E P= 239,8 [W/m^2] = E T1= 255,002 -18 [K] =WURZEL(WURZEL(P/eps/sigma)) [°C] =Z(-1)S-273,15 2.341 A simple model of the greenhouse effect FS = 1370 [W/m^2] solar constant F0 = 1/4 * (1-A)* FS F0 Fa Ta Solar transmittance s t*Fg Atmosphere thermal emittance = (1- thermal transmittance t ) Fa Fa = (1- t )* Ta4 s*F0 Fg = Tg4 Fg Tg Ground Quelle:D.G. Andrews:“An introduction to Atmospherical Physics; fig.1.2 t A simple model of the greenhouse effect: Bilance at the top of the atmosphere: F0 = Fa + t*Fg (1) F0 t*Fg Fa Ta Solar transmittance s thermal transmittance Atmosphere thermal emittance = (1- t ) Fa s*F0 Bilance at the ground: s*F0 + Fa = Fg Tg Ground Quelle:D.G. Andrews:“An introduction to Atmospherical Physics; fig.1.2 (2) Fg t [Kirchhoff‘s law] A simple model of the greenhouse effect: Bilance at the top of the atmosphere: (1) F0 = Fa + t*Fg Bilance at the ground: (2) Fg = Fa + s*F0 Fa aus (1) in (2) einsetzen : Fg = [F0 - t*Fg ]+ s*F0 Fg = F0 * (1+ s ) / ( 1+ t) andererseits gilt: Also : Fg = Tg4 Tg4= F0 * (1+ s ) / ( 1+ t) Quelle:D.G. Andrews:“An introduction to Atmospherical Physics; fig.1.2 A simple model of the greenhouse effect: Also : Tg4 = F0 * (1+ s ) / ( 1+ t) Zahlenwerte: s = 0,9 ; ferner: t = 0,2 ; Albedo A=0,3 F0 = 1/4 * (1-A)* FS = 0,7* 1370/ 4 = 0,7* 340 = 240 [W/m2] = 5,67 *10- 8 [Wm-2K-4] Tg = 286 [K] The close agreement with Tg = 288 [K] is partly fortuitous, since in reality non radiative processes also contribute to the energy balance Quelle:D.G. Andrews:“An introduction to Atmospherical Physics; fig.1.2 Modell mit einfacher Atmosphäre 1. Parameter Stefan-BoltzmannKonstante Emissionsfaktor Solare Einstrahlung: auf m^2 Kugeloberfläche : =S0 / 4 direkte Rückstrahlung, Albedo Einstrahlung oben : (1 - A ) * S0/4 = Solare Einstrahlung am Grund Goto spielen sigma= eps= 5,7E-08 [W/m^2/K^4] 0,95 S0= E0= 1370 [W/m^2] 342,5 [W/m^2] A= 0,33 [W/m^2] F0= 229,475 [W/m^2] 2. Spezielle Parameter des Modells Transmission (solar) der Atmosphäre tau_s= 0,9 Transmission (thermisch) der Atmosphäre tau_t= 0,2 tau_Faktor= 1,58333 5. Strahlungsgleichgewicht: Gleichgewicht: P= sigma Tg^4 = Fo *tau_Faktor P= 363,3 [W/m^2] Tg= 282,931 Tg= 10 [K] [°C] 2.342 Komplexere Modelle Komplexere Modelle Geographic resolution characteristic of climate Models of the generations of climate models used in the IPCC Assessment Re-ports: FAR (IPCC, 1990), SAR (IPCC, 1996), TAR (IPCC, 2001a), and AR4 (2007). The figures above show how successive generations of these global models increasingly resolved northern Europe. These illustrations are representative of the most detailed horizontal resolution used for short-term climate simulations. The century-long simulations cited in IPCC Assessment Reports after the FAR were typically run with the previous generation’s resolution. Vertical resolution in both atmosphere and ocean models is not shown, but it has increased comparably with the horizontal resolution, beginning typically with a single-layer slab ocean and ten atmospheric layers in the FAR and progressing to about thirty levels in both atmosphere and ocean. Quelle: IPCC-AR4-wg1 (2007), Figure 1.4 Geographic resolution characteristic of climate Models Quelle: IPCC-AR4-wg1 (2007), Figure 1.4 aktueller Stand (2007): 30 levels in both atmosphere and ocean. Quelle: IPCC-AR4-wg1 (2007), Figure 1.4 Hierarchie der gekoppelten Modelle für Ozean und Atmosphäre nach Raumdimensionen geordnet Quelle: Prof. T. Stocker: „Einführung in die Klimamodellierung“, Vorlesungsskript WS 2002/2003; p.19; Tab.2.1 : Erläuterungen zur Tabelle 2.1 (Hierarchie der gekoppelten Modelle für Ozean und Atmosphäre ): Die Richtung der Dimensionen ist in Klammern spezifiziert: (lat = latitude, long = longitude, z = vertikal); 2.5d = mehrere 2-dimensionale Ozeanbecken, die im südlichen Ozean verbunden sind; Weitere viel verwendete Abkürzungen: EBM = energy balance model, AGCM = atmospheric general circulation model, OGCM = ocean general circulation model . QG = für quasi-geostrophisch, SST = sea surface temperature. In kursiv sind einige Modellbeispiele genannt (entweder Autoren oder Modellbezeichnung). EMICS: Das grau schattierte Gebiet enthält Klimamodelle reduzierter Komplexität (auch Earth System Models of Intermediate Complexity, EMICs genannt), mit denen lange Integrationen durchgeführt werden können (mehrere 10^3 – 10^6 Jahre, oder grosse ensembles). Quelle: Prof. T. Stocker: „Einführung in die Klimamodellierung“, Vorlesungsskript WS 2002/2003; p.19; Tab.2.1 : Klimamodelle sind gar nicht so einfach zu verstehen und zu beurteilen (hmm…..- was tun?) Daher : 1. Hinweis auf ausführliche Vorlesungen im www und auf gedruckte Publikationen. 2. Virtueller Gastvortrag : Prof. Broccoli, Rutgers University, New Jersey, USA 1. Ausgewählte Internetquellen Prof. Stocker, Bern http://www.climate.unibe.ch/ ~stocker/papers/skript0203.pdf zum Original Inhalt der Vorlesung von Prof. Stocker 1 Einführung.................... .........................................................................................................1 1.1 Ziel der Vorlesung und weiterführende Literatur ................................................................1 1.2 Das Klimasystem..................................................................................................................3 1.3 Aufgaben und Grenzen der Klimamodellierung ..................................................................6 1.4 Historische Entwicklung ......................................................................................................9 1.5 Einige aktuelle Beispiele zur Klimamodellierung .............................................................13 1.6 Zusammenfassung.................................................................... ...........................17 2 Modellhierarchie und einfache Klimamodelle ..................................................................19 2.1 Hierarchie der physikalischen Klimamodelle ....................................................................19 2.2 Punktmodell der Strahlungsbilanz ....................................................................................27 2.3 Numerische Lösung einer gewöhnlichen Differentialgleichung 1. Ordnung ............. .......30 2.4 Klimasensitivität im Energiebilanzmodell ................................................................... ......34 3 Advektion, Diffusion und Konvektion................................................................................41 3.1 Advektion..........................................................................................................................41 3.2 Diffusion............................................................................................................................42 3.3 Konvektion........................................................................................................................43 3.4 Advektions-Diffusionsgleichung und Kontinuitätsgleichung....................... .....................44 3.5 Numerische Lösung der Advektions-Gleichung ................................................................45 3.6 Weitere Verfahren zur Lösung der Advektions-Gleichung ..................................... ..........53 3.7 Numerische Lösung der Advektions-Diffusions Gleichung ..................................... .........59 3.8 Numerische Diffusion .......................................................................................................59 4 Energietransport im Klimasystem und seine Parametrisierung .....................................61 4.1 Grundlagen........................................................................................................................61 4.2 Wärmetransport in der Atmosphäre ..................................................................................62 4.3 Breitenabhängiges Energiebilanzmodell............................................................................65 4.4 Wärmetransport im Ozean ................................................................................................66 ....................................................... 5 Anfangswert- und Randwertprobleme...............................................................................71 5.1 Allgemeine Grundlagen .....................................................................................................71 5.2 Direkte numerische Lösung der Poissongleichung ............................................................72 5.3 Iterative Verfahren .............................................................................................................74 5.4 Successive Overrelaxation (SOR)......................................................................................75 6 Gross-skalige Zirkulation im Ozean...................................................................................77 6.1 Die Bewegungsgleichungen......................................................................................... .....77 6.2 Flachwassergleichungen als Spezialfall ............................................................................80 6.3 Verschiedene Typen von Gittern in Klimamodellen........................................................ ..81 6.4 Spektralmodelle.................................................................................................................85 6.5 Windgetriebene Strömung im Ozean (Stommel Modell) .............................................. ...87 6.6 Potentielle Vorticity: eine wichtige Erhaltungsgrösse .................................................... ..93 7 Gross-skalige Zirkulation in der Atmosphäre ..................................................................97 7.1 Zonale und meridionale Zirkulation .............................................................................. ....97 7.2 Das Lorenz-Saltzman Modell ..........................................................................................102 8 Atmosphäre-Ozean Wechselwirkung...............................................................................109 8.1 Kopplung von physikalischen Modellkomponenten................................................... .....109 8.2 Thermische Randbediungungen.................................................................................. .....110 8.3 Hydrologische Randbedingungen............................................................................... .....114 8.4 Impulsflüsse ............................................................................................................. ........116 8.5 Gemischte Randbedingungen ................................................................................... .......116 8.6 Gekoppelte Modelle................................................................................................... .. ...118 9 Multiple Gleichgewichte im Klimasystem .......................................................................122 9.1 Abrupte Klimawechsel aufgezeichnet in polaren Eisbohrkernen ............................... .....122 9.2 Multiple Gleichgewichte in einem einfachen Atmosphärenmodell............................. ....124 9.3 Multiple Gleichgewichte in einem einfachen Ozeanmodell ....................................... .....125 9.4 Multiple Gleichgewichte in gekoppelten Modellen.................................................... .....127 9.5 Schlussbemerkungen und Ausblick .................................................................................130 10 Übungsaufgaben zur Klimamodellierung........................................................................131 Prof. Claussen, Potsdam http://www.pik-potsdam.de/ ~claussen/lectures/ physikalische_klimatologie/ physklim1.pdf zum Original IMPRS, 4 June 2003 1. Earth System Models of Intermediate Complexity Martin Claussen Potsdam-Institut für Klimafolgenforschung / Universität Potsdam • Remarks on the Earth system • The spectrum of Earth system models • Examples from CLIMBER-2 and EMIC workshops • Perspective for Integrative Modelling Quelle: Claussen: „Earth System Models of Intermediate Complexity“,IMPRS, 4.6.2003; www.pik-potsdam.de/~claussen/lectures/ Climate modelling with quasi-realistic models experiences in describing climate during the Holocene and the Eemian, and in designing scenarios of plausible future climate change. The construction and utility of quasi-realistic climate models is reviewed. Examples of reconstructing past climates are presented, in particular for the last millennium and for the last interglacial, the Eemian (120 ka bp). In addition, the approach of constructing plausible future climates, conditional upon the extent the atmosphere is used as a dump for anthropogenic substances, is demonstrated with examples. Prof. von Storch, GKSS Hans von Storch Institute for Coastal Research, GKSS Research Center, Geesthacht, Germany Quelle: Hans von Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ 7.5.2004 Centro de Astrobiología, Madrid http://w3g.gkss.de/G/Mitarbeiter/storch/ IfK Institut für Küstenforschung 2. Virtueller Gastvortrag zunächst: Vorbereitung und Einstimmung Die Atmosphäre über Europa im diskreten Modell U. Cubasch BQuelle:DLR_Schumann200_Klimawandel.ppt Europa im diskretisierten Modell U. Cubasch BQuelle:DLR_Schumann2000_Klimawandel.ppt McGuffie and Hendersson-Sellers, 1997 BezugsQuelle: Claussen: „Earth System Models of Intermediate Complexity“,IMPRS, 4.6.2003; www.pik-potsdam.de/~claussen/lectures/ Für die zeit- und ortsabhängigen Zustandsvariablen: T = Temperatur = Dichte p = Druck {u,v,w} = Strömungsgeschwindigkeit (3 Komponenten) gelten in jeder Zelle die Grundgleichungen der Strömungs- undThermodynamik. (Erhaltung von Impuls [NavierStokes], Masse [Kontinuitätsgleichung], und Energie, und Zustandsgleichung .) Im Ozean wird an Stelle der Dichte meist der Salzgehalt S benutzt, da: = (S,T,p) . In der Atmosphäre kommen noch wg. der Energiebilanz der Wasserdampfgehalt q und flüssiges Wolkenwasser hinzu. Quelle: / Storch-Güss-Heimann 99, p.99ff./ Es wird ein auf der rotierenden Erde (Corioliskraft! ) ortsfestes (Advektionsterm! ) Koordinatensystem verwendet. Daher treten in den Navier Stokes Gln.(Impulserhaltung) auf: der Coriolis Parameter f: f = 2 * * sin mit: = Winkelgeschwindigkeit der Erddrehung , = geographische Breite und länge der Erdradius : a Quelle: / Storch-Güss-Heimann 99, p.99ff./ Erinnerung an die Hydrodynamik: Eulerian and Lagrangian description BQuelle: Prof. Dick Yue, MIT_ocw 13.021 „Marine Hydrodynamics“, lecture notes „2 Basic Equations“ http:/ocw.mit.edu/OcwWeb/Ocean-Engineering/13-021MarineHydrodynamicsFall2001/CourseHome/index.htm Erinnerung an die Hydrodynamik: D /Dt Behauptung : Es gilt: BQuelle: Prof. Dick Yue, MIT_ocw 13.021 Beweis : atmosphere Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ ocean Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Parameterizations The terms Fu, Fv, Gq, Gs, GT and Q describe the effect of “unresolved” processes on state variables u, v, q, ρ and T, i.e., Fu = Fu,Δx(u, v, q, ρ,T) These functions are called „parameterizations“; they are not uniquely determined (i.e., different formulations may serve the same purpose), and the limiting process is not defined, i.e., lim Fu,Δx(u, v, q, ρ,T) does not exist. x 0 There is nothing like “the differential equations” of climate. Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Institut für Küstenforschung Dynamical processes in the atmosphere IfK Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Institut für Küstenforschung Dynamical processes in a global atmospheric model IfK Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Institut für Küstenforschung Dynamical processes in the ocean IfK Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Institut für Küstenforschung Dynamical processes in a global ocean model IfK Quelle: v.Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Quasi-realistic Models • Models of aximum complexity, which feature as many processes as is possible given the computational resource. • Meant as a tool to simulate in space-time detail the trajectory of climate. • Quasi-realistic models do not “explain” but allow for “numerical experiments”. Quelle: Hans von Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ Quasi-realistic models Quelle: Hans von Storch: „Climate modelling with quasi-realistic models..”, Vortrag Madrid 7.5.2004; http://w3g.gkss.de/G/Mitarbeiter/storch/ 2.343 Virtueller Gastvortrag von Prof. Broccoli, USA: 1. Atmospheric General Circulation Modeling 2. Coupled General Circulation Modeling Prof. Anthony J. Broccoli Dept. of Environmental Sciences Rutgers University, New Jersey, USA Homepage: http://www.envsci.rutgers.edu/~broccoli/index.html Atmospheric General Circulation Modeling Anthony J. Broccoli Dept. of Environmental Sciences Zum Original: http://climate.envsci.rutgers.edu/climod/BroccoliAtmos_gcm_env544.ppt Coupled General Circulation Modeling Anthony J. Broccoli Dept. of Environmental Sciences Zum Original: http://climate.envsci.rutgers.edu/climod/BroccoliCoupled_gcm_env544.ppt 2.344 Übersicht : Komplexere Modelle Ist dies Bild schöner als die Urfassung,das folgende Bild? IPCC2001_TAR1_TS-Box3 Box 3: Climate Models: How are they built and how are they applied? Comprehensive climate models are based on physical laws represented by mathematical equations that are solved using a three-dimensional grid over the globe. For climate simulation, the major components of the climate system must be represented in submodels (atmosphere, ocean, land surface, cryosphere and biosphere), along with the processes that go on within and between them. Most results in this report are derived from the results of models, which include some representation of all these components. Global climate models in which the atmosphere and ocean components have been coupled together are also known as Atmosphere-Ocean General Circulation Models (AOGCMs). In the atmospheric module, for example, equations are solved that describe the large-scale evolution of momentum, heat and moisture. Similar equations are solved for the ocean. Currently, the resolution of the atmospheric part of a typical model is about 250 km in the horizontal and about 1 km in the vertical above the boundary layer. The resolution of a typical ocean model is about 200 to 400 m in the vertical, with a horizontal resolution of about 125 to 250 km. Equations are typically solved for every half hour of a model integration. Many physical processes, such as those related to clouds or ocean convection, take place on much smaller spatial scales than the model grid and therefore cannot be modelled and resolved explicitly. Their average effects are approximately included in a simple way by taking advantage of physically based relationships with the larger-scale variables. This technique is known as parametrization. IPCC2001_TAR1_TS-Box3 2.35 Projektionen und Szenarios für das 21. Jahrhundert 700 2.351 „Historische Perspektive“ CO2 in 2100 (with business as usual) The last 160,000 years (from ice cores) and the next 100 years 600 Double pre-industrial CO2 Lowest possible CO2 stabilisation level by 2100 400 CO2 now CO2 300 10 200 0 Temperature difference from now °C –10 100 160 120 80 40 Time (thousands of years) Quelle: IPCC-COP6a_Bonn2001_wg1_1_Houghton Now CO2 concentration (ppmv) 500 2.352 Emissionsszenarien und die Komplexität der weiteren Entwicklung •Die weitere Entwicklung der Emissionen von GHG und SO4- Aerosolen hängen vom komplexen Zusammenwirken vieler Faktoren ab: u.a. Bevölkerung : Wachstum, Altersstruktur, Land-Stadt-Übergang, Wanderung Ökonomie : Wachstum, Struktur Technik : Stand der Technik und Marktdurchdringung „nachhaltiger“ Technologien Regierung und Kultur • IPCC gibt einheitliche Emissionsszenarien vor: Climate change is a sustainable development issue Climate System •Temperature rise •Sea level rise •Precipitation changes Climate change impacts Feedbacks Environmental impacts Enhanced greenhouse effect Atmospheric Concentrations •Carbon dioxide •Methane •Nitrous oxide •Aerosols Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 9 Human & Natural Systems •Water resources, agriculture, forestry •Ecological systems and biodiversity •Human health Anthropogenic emissions Non-climate change stresses Socio-Economic Development Paths •Main drivers are economic growth, technology, population, governance structures, energy and land use IPCC gibt einheitliche Emissionsszenarien vor: SRES = Special Report on Emission Szenarios published in 2000 AD, 592 Seiten Summaries: SPM, TS Chapters: 1: Background and Overview 2: An Overview of the Scenario Literature 3: Scenario Driving Forces 4: An Overview of Scenarios 5: Emission Scenarios 6: Summary Discussions and Recommendations Appendices: ..... IV: Six Modeling Approaches V: Database Description VI: Open Process VII Data tables Die 4 Leitszenarien der IPCC -Berichte BQuelle: VGB-Literaturrecherche 2006 „Klimawandel und Energiewqirtschaft“, p.106, Bild 8.6, UrQuelle: Kasang, HamburgerBildungsserver, 2005, nach IPCC The composition of the atmosphere is projected to change causing an increase in temperature and sea level Stand: TAR 2001 Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 10 Stand: TAR 2001 3.353 Main climate changes • Higher temperatures - especially on land • Sea level rise • Hydrological cycle more intense • Changes at regional level Quelle: IPCC-COP6a_Bonn2001_wg1_1_Houghton 3.3531 Higher Temperatures Understanding Near Term CC Quelle:IPCC-AR4-wg1_TS, p.69, Fig.TS.26. OriginalBildunterschrift: Model projections of global mean warming compared to observed warming. Observed temperature anomalies, as in Figure TS.6, are shown as annual (black dots) and decadal average values (black line). Projected trends and their ranges from the IPCC First (FAR) and Second (SAR) Assessment Reports are shown as green and magenta solid lines and shaded areas, and the projected range from the TAR is shown by vertical blue bars. These projections were adjusted to start at the observed decadal average value in 1990. Multi-model mean projections from this report for the SRES B1, A1B and A2 scenarios, as in Figure TS.32, are shown for the period 2000 to 2025 as blue, green and red curves with uncertainty ranges indicated against the right-hand axis. The orange curve shows model projections of warming if greenhouse gas and aerosol concentrations were held constant from the year 2000 – that is, the committed warming. Quelle:IPCC-AR4-wg1_TS, p.69, Fig.TS.26 Bildunterschrift: 3.3531a Large Scale projections for the 21.Century Projected global surface warming at the end of the 21st century. Quelle:IPCC-AR4-wg1_TS, p.70, TableTS.6 Projections of Future Changes in Climate Best estimate for low scenario (B1) is 1.8°C (likely range is 1.1°C to 2.9°C), and for high scenario (A1FI) is 4.0°C (likely range is 2.4°C to 6.4°C). Broadly consistent with span quoted for SRES in TAR, but not directly comparable Quelle:IPCC-AR4wg1_Vortrag Pachauri Projections of Surface Temperature Scenario B1 Scenario A1B Scenario A2 °C Quelle:IPCC-AR4-wg1_TS, p.72, Fig. TS28 Projected warming in 21st century expected to be greatest over land and at most high northern latitudes and least over the Southern Ocean and parts of the North Atlantic Ocean Original Bildunterschrift: Projected surface temperature changes for the early and late 21st century relative to the period 1980 to 1999. The panels show the AOGCM multi-model average projections (°C) for the B1 (top), A1B (middle) and A2 (bottom) SRES scenarios averaged over the decades 2020 to 2029 and 2090 to 2099 (right). Some studies present results only for a subset of the SRES scenarios, or for various model versions. Therefore the difference in the number of curves, shown in the left-hand panels, is due only to differences in the availability of results. {Adapted from Figures 10.8 and 10.28} Quelle:IPCC-AR4-wg1_TS, p.72, Fig. TS28, Bildunterschrift Corresponding uncertainties to the Projected Temperature Changes Uncertainties as the relative probabilities of estimated global average warming from several different AOGCM and EMIC studies for the same periods. Quelle:IPCC-AR4-wg1_TS, p.72, Fig. TS28 (nun vollständig) Folgerung: Near term projections insensitive to choice of scenario Longer term projections depend on scenario and climate model sensitivities Summary: Projections of Future Changes in Climate For the next two decades a warming of about 0.2°C per decade is projected for a range of SRES emission scenarios. Even if the concentrations of all greenhouse gases and aerosols had been kept constant at year 2000 levels, a further warming of about 0.1°C per decade would be expected. Earlier IPCC projections of 0.15 to 0.3 oC per decade can now be compared with observed values of 0.2 oC Quelle:IPCC-AR4wg1_Vortrag Pachauri Land areas warm more than the oceans with the greatest warming at high latitudes Stand: TAR 2001 (SRES Scenario A2 for 2071-2100 AD relative to 1961-1990) Multi-model ensemble annual mean change of the temperature for emission scenario A2 Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 13; Urquelle: IPCCC2001_TAR1 Fig.9.10d, p.547 (vereinfacht) 3.3532 Sea Level Rise Quelle:IPCC-AR4-wg1_TS, p.70, TableTS.6 Tens of millions of people are projected to be at risk of being displaced by sea level rise Assuming 1990s Level of Flood Protection Stand: TAR 2001 Source: R. Nicholls, Middlesex University in the U.K. Meteorological Office. 1997. Climate Change and Its Impacts: A Global Perspective. Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 18 3.3533 Hydrological Cycle Hydrological Cycle more intense precipitation increases very likely in high latitudes Decreases likely in most subtropical land regions Quelle:IPCC-AR4wg1_Vortrag Pachauri Weitere Aussagen der Modelle Projections of Future Changes in Climate There is now higher confidence in projected patterns of warming and other regional-scale features, including changes in wind patterns, precipitation, and some aspects of extremes and of ice. PROJECTIONS OF FUTURE CHANGES IN CLIMATE • Snow cover is projected to contract • Widespread increases in thaw depth most permafrost regions • Sea ice is projected to shrink in both the Arctic and Antarctic • In some projections, Arctic late-summer sea ice disappears almost entirely by the latter part of the 21st century PROJECTIONS OF FUTURE CHANGES IN CLIMATE • Very likely that hot extremes, heat waves, and heavy precipitation events will continue to become more frequent • Likely that future tropical cyclones will become more intense, with larger peak wind speeds and more heavy precipitation • less confidence in decrease of total number • Extra-tropical storm tracks projected to move poleward with consequent changes in wind, precipitation, and temperature patterns 2.36 Was tun ? Erste Ansätze der Internationalen Gemeinschaft UNITED NATIONS FRAMEWORK CONVENTION ON CLIMATE CHANGE: UNFCC92: Rio de Janeiro 1992 ARTICLE 2: OBJECTIVE The ultimate objective of this Convention .... is to achieve, .… stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system. Such a level should be achieved within a time-frame sufficient : • to allow ecosystems to adapt naturally to climate change. • to ensure that food production is not threatened, and • to enable economic development to proceed in a sustainable manner. Quelle: IPCC-COP6a_Bonn2001_wg1_1_Houghton Stabilization of the atmospheric concentration of carbon dioxide will require significant emissions reductions Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 19 IPCC: Climate Change 2001- The Scientific Basis Summary for Policymakers (SPM) Drafted by a team of 59 Approved ‘sentence by sentence’ by WGI plenary (99 Governments and 45 scientists) 14 chapters 881 pages 120 Lead Authors 515 Contributing Authors 4621 References quoted Quelle: IPCC-COP6a_Bonn2001_wg1_1_Houghton Quelle: IPCC-COP6a_Bonn2001_wg1_1_Houghton IPCC Website http://www.ipcc.ch Ansatzpunkte zur Wende 1. CO2-freie Energiequellen • Erneuerbare Energien ( RE =Renewable Energies) Wasserkraft, Wind, Biomasse, Sonne (themisch, Strom) • Kernenergie , Generation IV ; Kernfusion • Geothermie (Oberflächennah, Tiefe Geothermie) 2. CO2 Sequester und GeoEngineering • CCS, Storage: in geologischen Schichten, im Meer • Eisendüngung zum Algenwachstum, Aufforsten • Sulfat in die Stratoposhäre 3. Rationelle Energieverwendung • Gleiche Energiedienstleistung mit geringerem Energieeinsatz • Höhere Wirkungsgrade bei Kraftwerken, Motoren etc. 4. Verhaltensänderung • Leben mit weniger Energiedienstleistungen, aus Knappheit oder Bescheidenheit • Ernährung: „Weniger Fleisch“ Pflicht für jeden Immer strebe zum Ganzen, und kannst Du selber kein Ganzes Werden, als dienendes Glied schließ an ein Ganzes Dich an Spruch von JWG vom bescheidenen aber endlichen Beitrag eines Wasserträgers Quelle: J.W. Goethe: Gedichte, Herausgeber ErichTrunz, Verlag C.H. Beck. p.226 ; Urquelle:JWG: Distichon im Zusammenhang der Xenien entstanden, aber außerhalb des Xenien Zyklus veröffentlicht Wichtigste benutzte Literatur für 0.2 : 1. IPCC-COP6a_Bonn2001_WatsonSpeech: Redemanuskript + Bilder 2. IPCC2001_TAR1: Climate Change 2001, The Scientific Basis insbesondere Technical Summary und die jeweils als Quelle oder „Urquelle“ angegebenen Seiten. Reste CO2, temperature, precipitation and sea level in the 21.th century All IPCC projections show that the atmospheric concentration of CO2 will increase significantly during the 21th century in the absence of climate change policies; Climate models project that the Earth will warm 1.4 to 5.8 °C between 1990 and 2100, with most land areas warming more than the global average; Precipitation will increase globally, with increases and decreases locally, with an increase in heavy precipitation events over most land areas; Sea level is projected to increase 8-88 cm between 1990 and 2100; Models project an increase in extreme weather events, e.g. heatwaves, heavy precipitation events, floods, droughts, fires, pest outbreaks, mid-latitude continental summer soil moisture deficits, and increased tropical cyclone peak wind and precipitation intensities. Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: p 1-Summary Global mean surface temperature is projected to increase during the 21st century Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 11 Projected surface temperatures for the 21st century would be unheralded in the last 1000 years Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 12 Land areas warm more than the oceans with the greatest warming at high latitudes (SRES Scenario A2 for 2071-2100 AD relative to 1961-1990) Multi-model ensemble annual mean change of the temperature for emission scenario A2 Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 13; Urquelle: IPCCC2001_TAR1 Fig.9.10d, p.547 (vereinfacht) There is significant inertia in the climate system Scenario: Stabilisation of [CO2] at 550 ppm Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 14 Some areas are projected to become wetter, others drier (SRES Scenario A2 for 2071-2100 AD relative to 1961-1990) Multi-model ensemble annual mean change of the precipitation for emission scenario A2 UrQuelle: IPCC2001_TAR: Fig.9.11d, p.550 (vereinfacht) Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 15 Projected Changes in Extreme Climate Events and Resulting Impacts Projected Changes during the 21st Century in Extreme Climate Phenomena and their Likelihooda Representative Examples of Projected Impactsb (all high confidence of occurrence in some areasc) Higher maximum temperatures, more hot days and heat wavesd over nearly a all land areas (Very likely ) • Higher [Increasing] • fewer cold days, frost days and cold wavesd a over nearly all land areas (Very likely ) • 1. Simple Extremes minimum temperatures, • • • • • More intense precipitation events • • (Very likelya, over many areas) • • • Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Tab 1 Increased incidence of death and serious illness in older age groups and urban poor [4.7] Increased heat stress in livestock and wildlife [4.2 and 4.3] Shift in tourist destinations [Table TS-2 and 5.7] Increased risk of damage to a number of crops [4.2] Increased electric cooling demand and reduced energy supply reliability [Table TS-4 and 4.5] Decreased cold-related human morbidity and mortality [4.7] Decreased risk of damage to a number of crops, and increased risk to others [4.2] Extended range and activity of some pest and disease vectors [4.2 and 4.3] Reduced heating energy demand [4.5] Increased flood, landslide, avalanche, and mudslide damage [4.5] Increased soil erosion [5.2.4] Increased flood runoff could increase recharge of some floodplain aquifers [4.1] Increased pressure on government and private flood insurance systems and disaster relief [Table TS-4 and 4.6] Projected Changes in Extreme Climate Events and Resulting Impacts (cont.) 2. Complex Extremes Increased summer drying over most mid-latitude continental interiors and associated risk of drought a (Likely ) Increase in tropical cyclone peak wind intensities, mean and peak precipitation a intensities (Likely , over some areas)e • • • • • • • Intensified droughts and floods associated with El Niño events in many a different regions (Likely ) [See also under droughts and intense precipitation events] Increased Asian summer monsoon a precipitation variability (Likely ) Increased intensity of mid-latitude storms (Little agreement between current models)d Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Tab 1 continued • • • • • • Decreased crop yields [4.2] Increased damage to building foundations caused by ground shrinkage [Table TS-4] Decreased water resource quantity and quality [4.1 and 4.5] Increased risk of forest fire [5.4.2] Increased risks to human life, risk of infectious disease epidemics and many other risks[4.7] Increased coastal erosion and damage to coastal buildings and infrastructure [4.5 and 7.2.4] Increased damage to coastal ecosystems such as coral reefs and mangroves [4.4] Decreased agricultural and rangeland productivity in drought- and flood-prone regions [4.3] Decreased hydro-power potential in drought-prone regions [5.1.1 and Figure TS-7] Increase in flood and drought magnitude and damages in temperate and tropical Asia [5.2.4] Increased risks to human life and health [4.7] Increased property and infrastructure losses [Table TS-4] Increased damage to coastal ecosystems [4.4] Crop yields are projected to decrease throughout the tropics and sub-tropics, but increase at high latitudes 2020‘s 2050‘s 2080‘s Percentage change in average crop yields for the climate change scenario. Effects of CO2 are taken into account. Crops modeled are: wheat, maize and rice. Jackson Institute, University College London / Goddard Institute for Space Studies / International Institute for Applied 97/1091 16 Systems Analysis Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 17 Tens of millions of people are projected to be at risk of being displaced by sea level rise Assuming 1990s Level of Flood Protection Source: R. Nicholls, Middlesex University in the U.K. Meteorological Office. 1997. Climate Change and Its Impacts: A Global Perspective. Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: Fig 18 Biological systems have already been affected Biological systems have already been affected in many parts of the world by changes in climate, particularly increases in regional temperature Bird migration patterns are changing and birds are laying their eggs earlier; the growing season in the Northern hemisphere has lengthened by about 1-4 days per decade during the last 40 years; and there has been a pole-ward and upward migration of plants, insects and animals. Projected changes in climate will have both beneficial and adverse effects on water resources, agriculture, natural ecosystems and human health, but the larger the changes in climate the more the adverse effects dominate Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: p 2-Summary Projected changes in climate will have both beneficial and adverse effects on • water resources, • agriculture, •natural ecosystems • human health, but: • the larger the changes in climate - the more the adverse effects dominate Quelle: IPCC-COP6a_Bonn2001_WatsonSpeech: p 2-Summary Early Results for 2007-Report IPCC-AR4 UrQuelle:MPI-Meteorologie, Hamburg, Modellrechnungen mit ECHAM5 BQuelle: nature439,2006-0126,p.375, „Early results“ of AR4, http://www.nature.com/nature/journal/v439/n7075/pdf/439374a.pdf Early Results for 2007-Report IPCC-AR4 Model calculations with 3 emissions scenarios, representing 550, 700 and 800 ppm CO2 by 2100 AD , give: • Global temperatures are likely to rise by 2.5 – 4 °C by 2100, • Arctic will become ice-free during summer by 2090 AD . (even in the 550 ppmCO2 case) • The global sea level will rise by up to 40 cm , composed of up to 30 cm by an additional 10 cm as water warms and expands, and as part of Greenland’s ice sheet melts. • weakening of the Atlantic ocean circulation. (not a shut down !) • more rain and snow at high latitudes and in the tropics, and • less rainfall in Mediterranean and subtropical regions. • extreme precipitation and drought increase worldwide. UrQuelle:MPI-Meteorologie, Hamburg, Modellrechnungen mit ECHAM5 BQuelle: nature439,2006-0126,p.375, „Early results“ of AR4, http://www.nature.com/nature/journal/v439/n7075/pdf/439374a.pdf Early Results for 2007-Report IPCC-AR4 Originaltext: Global temperatures are likely to rise by 2.5–4 C by 2100, according to the latest calculations by scientists at the Max Planck Institute for Meteorology in Hamburg, Germany. The institute is one of 15 asked by the Intergovernmental Panel on Climate Change to run extended climate simulations for its fourth assessment report. The researchers ran six parallel experiments, requiring 400,000 computing hours, using their atmospheric general circulation model ECHAM5. They looked at three emissions scenarios, representing carbon dioxide concentrations of 550, 700 and 800 parts per million (p.p.m.) by 2100 (see graph). Even under the most optimistic assumptions, the model suggests that the Arctic will become ice-free during summer by 2090, says Erich Roeckner, who heads the group. The global sea level will rise by up to 30 centimetres as water warms and expands, and by an additional 10 centimetres as part of Greenland’s ice sheet melts. The scientists also expect a weakening — but not a shut-down — of the Atlantic ocean circulation. There will be more rain and snow at high latitudes and in the tropics, and less rainfall in Mediterranean and subtropical regions. Extreme precipitation and extreme drought are likely to increase worldwide. Q.S. (Q.S.Quirin Schiermeier) UrQuelle:MPI-Meteorologie, Hamburg, Modellrechnungen mit ECHAM5 BQuelle: nature439,2006-0126,p.375, „Early results“ of AR4, http://www.nature.com/nature/journal/v439/n7075/pdf/439374a.pdf