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12/2/13 Blackbody radiaton UV
vis
IR
FB ( λ) =
Sun: 5800K
2πc 2 hλ−5
e ch / kB λT −1
FB = σT 4
σ = 5.671 x 10-8 W m-2 K-4 S&P
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Global energy balance
From Trenberth, Kevin E., John T. Fasullo, Jeffrey Kiehl. Earth's Global Energy Budget. Bull. Amer.
Meteor. Soc., 90 (2009): 311–23. © American Meteorological Society. Used with permission.
Trenberth et al (BAMS 2009)
htp://climateknowledge.org/fgures/WuGblog fgures/RBRWuG0086 Trenberth Radiatve Balance BAMS 2008.GIF
2
12/2/13 Absorbers/scaterers
Image courtesy of Robert A. Rohde on Wikimedia Commons. License: CC-BY-SA. This content is excluded
from our Creative Commons license. For more information, see http://ocw.mit.edu/help/faq-fair-use/.
htp://en.wikipedia.org/wiki/File:Atmospheric Transmission.png
Changes in GHGs
© Intergovernmental panel on Climate Change CIpCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information, see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR5 WG1, 2013
3
12/2/13 Radiatve Forcing, Efectve Radiatve Forcing
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information, see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR5 WG1, 2013
Radiatve forcing
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information,see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR5 WG1, 2013
4
12/2/13 Defning/quantfying greenhouse gases
S&P
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information, see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR5 WG1, 2013
Ulimate efects of diferent GHGs
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information,see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR5 WG1, 2013
5
12/2/13 Role of emissions, chemistry
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information, see http://ocw.mit.edu/help/faq-fair-use/.
IPee AR4 WG1, 2007
Emissions-based GWPs (100 yr; AR4)
© Intergovernmental Panel on Climate Change (IPCC). All rights reserved. This content is excluded
from our Creative Commons license. For more information,see http://ocw.mit.edu/help/faq-fair-use/.
AR5: NOx: -11 to -31; UO: 3-5, VOU: 4.5
not including aerosol efects
IPee AR4 WG1, 2007
6
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