Exchange of trace gases between the terrestrial
... World War II have further depleted soil C stores by the widespread replacement of mixed or animal-based farming systems with continuous monocultures. On the other hand, the higher productivity of intensively fertilized systems may be increasing soil C stores depleted by initial (pre-1900) cultivatio ...
... World War II have further depleted soil C stores by the widespread replacement of mixed or animal-based farming systems with continuous monocultures. On the other hand, the higher productivity of intensively fertilized systems may be increasing soil C stores depleted by initial (pre-1900) cultivatio ...
Drought and Elevated CO2 Impacts On Soil Structure and
... Plant Sciences Dept., Univ. of California, Davis, One Shields Ave, 95616 Davis, CA. 2Land, Air, and Water Resources Dept., , Univ. of California, Davis, One Shields Ave, 95616 Davis, CA. 3Univ. of Illinois, Urbana, IL. ...
... Plant Sciences Dept., Univ. of California, Davis, One Shields Ave, 95616 Davis, CA. 2Land, Air, and Water Resources Dept., , Univ. of California, Davis, One Shields Ave, 95616 Davis, CA. 3Univ. of Illinois, Urbana, IL. ...
INSPIRATION – Towards a Strategic Research Agenda on Soil, Land
... The combination of soil and sediment remediation with other activities (e.g. energy production) could give a positive imago to remediation actions which are usually only considered as a “cost”. It can also inspire and convince “less experienced” countries/regions/enterprises to start with remediatio ...
... The combination of soil and sediment remediation with other activities (e.g. energy production) could give a positive imago to remediation actions which are usually only considered as a “cost”. It can also inspire and convince “less experienced” countries/regions/enterprises to start with remediatio ...
2 Forest soil functions
... CC0242 developed a modelling tool for estimating changes in soil carbon stocks due to changes in land use and management for the National Carbon Dioxide Inventory, although the system was also applied to possible climate impacts using UKCIP02 and HadCM3 scenario data. This showed that, assuming cons ...
... CC0242 developed a modelling tool for estimating changes in soil carbon stocks due to changes in land use and management for the National Carbon Dioxide Inventory, although the system was also applied to possible climate impacts using UKCIP02 and HadCM3 scenario data. This showed that, assuming cons ...
Climate-biosphere interactions on glacial
... dissolution of settling dust particles, and decades to centuries if the proximal source of iron is upwelling. Thus climate changes associated with radiative forcing are likely to be in phase globally, on timescales of decades to centuries. The great exception, of course, is associated with glaciated ...
... dissolution of settling dust particles, and decades to centuries if the proximal source of iron is upwelling. Thus climate changes associated with radiative forcing are likely to be in phase globally, on timescales of decades to centuries. The great exception, of course, is associated with glaciated ...
REGENERATION OF SOILS AND ECOSYSTEMS: THE
... since the Earth Summit (Rio de Janeiro, 1992) indicators show much worsening and certainly no improvement. Global emissions increase and soil erosion is every year hitting new negative records. ...
... since the Earth Summit (Rio de Janeiro, 1992) indicators show much worsening and certainly no improvement. Global emissions increase and soil erosion is every year hitting new negative records. ...
carbon in forest soils—research needs
... analysis indicated that, while both decomposition and productivity increase with increasing temperature, litter carbon will decrease because the former increases at a greater rate than the latter. The simple decay model he proposed appears to be very useful in predicting times to quasi-steady-state ...
... analysis indicated that, while both decomposition and productivity increase with increasing temperature, litter carbon will decrease because the former increases at a greater rate than the latter. The simple decay model he proposed appears to be very useful in predicting times to quasi-steady-state ...
Soil erosion and climate change: the transect approach and the
... landscape at different scales. A point measurement has a value which is influenced by Ža. the general position along the transect Žlandscape scale., Žb. slope characteristics, such as aspect and hillslope shading Žslope scale., Žc. plot characteristics, such as shading and cover Žresponse unit scale ...
... landscape at different scales. A point measurement has a value which is influenced by Ža. the general position along the transect Žlandscape scale., Žb. slope characteristics, such as aspect and hillslope shading Žslope scale., Žc. plot characteristics, such as shading and cover Žresponse unit scale ...
Can we model observed soil carbon changes from a dense inventory?
... the storage capacity of soils appears to be limited (Six et al., 2002; Jastrow et al., 2005; Hungate et al., 2009), in particular because increased input to the soil feeds back to increased decomposition. Based on 5662 in situ measurements from the National Soil Inventory (NSI) of England and Wales, ...
... the storage capacity of soils appears to be limited (Six et al., 2002; Jastrow et al., 2005; Hungate et al., 2009), in particular because increased input to the soil feeds back to increased decomposition. Based on 5662 in situ measurements from the National Soil Inventory (NSI) of England and Wales, ...
The Worms Beneath Our Feet- A study of worm density and its
... communication). A second difference in the garden plot is that the soil was bare at the time of our sample. There is no vegetation growing in the soil other than a few decomposing plants from last summer's crop. A third difference is that the soil is relatively loose due to yearly tilling; students ...
... communication). A second difference in the garden plot is that the soil was bare at the time of our sample. There is no vegetation growing in the soil other than a few decomposing plants from last summer's crop. A third difference is that the soil is relatively loose due to yearly tilling; students ...
Abrupt climate changes: Oceans, Ice, and Us - NAS
... from night, and summer from winter, because of huge changes in the amount of sunshine. Over tens of thousands of years, Earth’s orbital features change sunshine at particular latitudes by more than 10% to pace ice ages, although mostly by moving sunshine to other latitudes on the planet rather than ...
... from night, and summer from winter, because of huge changes in the amount of sunshine. Over tens of thousands of years, Earth’s orbital features change sunshine at particular latitudes by more than 10% to pace ice ages, although mostly by moving sunshine to other latitudes on the planet rather than ...
PDF
... in production activities and producer income to determine how much soil C could be sequestered under different scenarios. For the most part, these simulation models depend upon assumptions about the ease of transition from one management system to another and how quickly agricultural producers chang ...
... in production activities and producer income to determine how much soil C could be sequestered under different scenarios. For the most part, these simulation models depend upon assumptions about the ease of transition from one management system to another and how quickly agricultural producers chang ...
Powerpoint - Steven J Phipps
... • There is evidence that the period a.d. 900–1200 was warm in the North Atlantic. This Medieval Warm Period,coincides with the Viking settlement of Greenland. • The so-called Little Ice Age, from 1400 to 1850,was a cold period for western Europe as alpine glaciers advanced and temperatures fell by a ...
... • There is evidence that the period a.d. 900–1200 was warm in the North Atlantic. This Medieval Warm Period,coincides with the Viking settlement of Greenland. • The so-called Little Ice Age, from 1400 to 1850,was a cold period for western Europe as alpine glaciers advanced and temperatures fell by a ...
Quantifying the Stock of Soil Carbon Sequestration in
... International efforts to mitigate human-caused changes in the Earth‟s climate are considering a system of incentives that would encourage specific changes in land use that can help to reduce the atmospheric concentration of carbon dioxide. The two primary landbased activities that would help to mini ...
... International efforts to mitigate human-caused changes in the Earth‟s climate are considering a system of incentives that would encourage specific changes in land use that can help to reduce the atmospheric concentration of carbon dioxide. The two primary landbased activities that would help to mini ...
Temperaturedependent remineralization in a warming ocean
... (POC) and dissolved organic carbon (DOC). To determine export production of organic carbon, the formation of detritus is computed from mortality of phytoplankton and zooplankton and fecal pellet production by zooplankton in a first step. Then, to compute the contribution of CaCO3 shell formation and ...
... (POC) and dissolved organic carbon (DOC). To determine export production of organic carbon, the formation of detritus is computed from mortality of phytoplankton and zooplankton and fecal pellet production by zooplankton in a first step. Then, to compute the contribution of CaCO3 shell formation and ...
Kansas Geological Survey Public Information Circular 28
... called erratics, the most common of these is Sioux Quartzite, a pink metamorphosed sandstone more than a billion years old. Sioux Quartzite found in Kansas came from southern Minnesota, South Dakota, and northwestern Iowa. Sometimes these rocks occur in such density that geologists describe the feat ...
... called erratics, the most common of these is Sioux Quartzite, a pink metamorphosed sandstone more than a billion years old. Sioux Quartzite found in Kansas came from southern Minnesota, South Dakota, and northwestern Iowa. Sometimes these rocks occur in such density that geologists describe the feat ...
Performance Benchmark E
... increased the concentrations of CO2 and other greenhouse gases in the atmosphere. In the past 500,000 years, atmospheric concentrations of CO 2 have been significantly greater than current levels. Evidence from ice coring in Greenland and Antarctica shows a strong correlation between greater concent ...
... increased the concentrations of CO2 and other greenhouse gases in the atmosphere. In the past 500,000 years, atmospheric concentrations of CO 2 have been significantly greater than current levels. Evidence from ice coring in Greenland and Antarctica shows a strong correlation between greater concent ...
Forest decline caused by high soil water conditoins in a permafrost
... compared to values recorded for the same area in previous studies. For both wet years, the mean degree of saturation (s) was significantly greater in YBL than NL areas, whereas the converse was the case for the gas diffusivity in soil. This implies that rather than mitigating water stress suffered d ...
... compared to values recorded for the same area in previous studies. For both wet years, the mean degree of saturation (s) was significantly greater in YBL than NL areas, whereas the converse was the case for the gas diffusivity in soil. This implies that rather than mitigating water stress suffered d ...
Limited potential of no-till agriculture for climate change
... of practices termed conservation agriculture (CA), comprising retention of crop residues on the soil surface and diversification of cropping systems in addition to reduced or no-till. Here we specifically address no-till agriculture rather than the complete CA package because this was the focus of t ...
... of practices termed conservation agriculture (CA), comprising retention of crop residues on the soil surface and diversification of cropping systems in addition to reduced or no-till. Here we specifically address no-till agriculture rather than the complete CA package because this was the focus of t ...
Climate Records from Ice Cores
... CO2 found in ice cores and independent evidence of ocean change. • Thus our current understanding of the processes controlling the earth’s carbon (CO2) cycle on glacial to interglacial time scales is incomplete. ...
... CO2 found in ice cores and independent evidence of ocean change. • Thus our current understanding of the processes controlling the earth’s carbon (CO2) cycle on glacial to interglacial time scales is incomplete. ...
Soil and human security in the 21st century
... Human security has and will continue to rely on Earth’s diverse soil resources. Yet we have now exploited the planet’s most productive soils. Soil erosion greatly exceeds rates of production in many agricultural regions. Nitrogen produced by fossil fuel and geological reservoirs of other fertilizers ...
... Human security has and will continue to rely on Earth’s diverse soil resources. Yet we have now exploited the planet’s most productive soils. Soil erosion greatly exceeds rates of production in many agricultural regions. Nitrogen produced by fossil fuel and geological reservoirs of other fertilizers ...
Soil and human security in the 21st century
... Human security has and will continue to rely on Earth’s diverse soil resources. Yet we have now exploited the planet’s most productive soils. Soil erosion greatly exceeds rates of production in many agricultural regions. Nitrogen produced by fossil fuel and geological reservoirs of other fertilizers ...
... Human security has and will continue to rely on Earth’s diverse soil resources. Yet we have now exploited the planet’s most productive soils. Soil erosion greatly exceeds rates of production in many agricultural regions. Nitrogen produced by fossil fuel and geological reservoirs of other fertilizers ...
Changing sources of nutrients during four million years of ecosystem
... atmospheric compared with rock sources of strontium, and by implication, of its fellow alkaline earth elements calcium and magnesium46. However, differential weathering rates of minerals in rocks often leads to long-term fractionation of weathering sources and their isotopic values, and inhomogeneit ...
... atmospheric compared with rock sources of strontium, and by implication, of its fellow alkaline earth elements calcium and magnesium46. However, differential weathering rates of minerals in rocks often leads to long-term fractionation of weathering sources and their isotopic values, and inhomogeneit ...
Proposal_Draft_1 - Laboratory of Tree
... climatic fluctuations (Dietz and Von Arx 2005) further underscoring their value in dating newly exposed surfaces. Maximum ages of certain species of shrubs and herbs found in the Alps have ranged from 60 to 100 years (Schweingruber and Dietz 2001). In the White Mountains of California, USA, high alp ...
... climatic fluctuations (Dietz and Von Arx 2005) further underscoring their value in dating newly exposed surfaces. Maximum ages of certain species of shrubs and herbs found in the Alps have ranged from 60 to 100 years (Schweingruber and Dietz 2001). In the White Mountains of California, USA, high alp ...
Ice Sheets ESS Compilation B > A > E > H > B>A Human activities
... Human activities have increased the levels of greenhouse gases in the atmosphere and have thus augmented global temperatures. Greenhouse gases include water vapor, carbon dioxide, and methane, and they are part of the Greenhouse Effect. The Greenhouse effect is a naturally occurring phenomenon, that ...
... Human activities have increased the levels of greenhouse gases in the atmosphere and have thus augmented global temperatures. Greenhouse gases include water vapor, carbon dioxide, and methane, and they are part of the Greenhouse Effect. The Greenhouse effect is a naturally occurring phenomenon, that ...