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Understanding how much permafrost carbon will be released, over what time frame, and what the relative emissions of carbon dioxide and methane would be is key to understanding global climate change. In addition, vegetation in a warming climate can help to offset at least some of the warming feedback to the climate from permafrost carbon.
Source link: https://www.osti.gov/biblio/1899837
With average annual rainfall rises, annual LAI in Grassland has risen linearly with annual rainfall, with both SiB4 and the Moderate Resolution Imaging Spectroradiometer showing a 0. 13 rise in LAI per 100 mm increase in precipitation. Both gross primary production and ecosystem respiration increase with increasing season length by 8. 5 g C m -2 per day, with SiB4 and Fluxnet expecting within 18%. Despite differences in mean annual rainfall and increasing season length, all grassland locations shift to seasonal carbon sinks one month before peak takeoff. During a U. S. drought, MODIS and SiB4 had almost identical LAI responses, and the LAI change as a result of drought was less than the LAI change across the precipitation gradient, suggesting that grassland drought response is not as robust as the overlying climate response.
Source link: https://www.osti.gov/biblio/1800139
Although natural mechanisms contributing to this positive climateu2013carbon feedback have been tested using Earth system models, analogous feedback concerning human activities have not been systematically quantified. Here we conceptualize and estimate the number of several economic sources that contribute to a carbon capture and transportation's carbon emissions, including population, GDP, heating and cooling, and transportation carbon intensity. We find that climate-driven decreases in economic growth may in turn reduce human energy use and hence fossil fuel CO 2 emissions in the United States. Although the effects of climate change on the economy may offset diminished land and ocean carbon sinks, a lack of economic growth could have societal consequences, possibly increasing wealth inequity, and limiting resources available for effective adaptation.
Source link: https://www.osti.gov/biblio/1904010
To investigate the coupling between climate change and the carbon cycle, eleven coupled climate change u2013carbon cycle models used a joint protocol. CO 2 anthropogenic emissions for the 1850-u20132100 time period were compelled by historical emissions and the Intergovernmental Panel on Climate Change's Climate Change Special Report on Emissions Scenarios A2 anthropogenic emissions of CO 2 for the 1850-to-date date. Two simulations were run for each model in order to determine the effect of climate change on the land and ocean carbon cycle, as well as the atmospheric CO 2 concentration growth rate, which was then monitored. Future climate change would reduce the effectiveness of the earth system's ability to resist the anthropogenic carbon perturbation, according to one of the models. If climate change is factored in, a larger proportion of anthropogenic CO 2 will remain airborne. The higher CO 2 levels resulted in more global warming ranging from 0. 1 u00b0 to 1. 5 u00b0C.
Source link: https://www.osti.gov/biblio/1564627
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