Impact of changes in diffuse radiation on the global land carbon sink Export

@article{citeulike:4383912, abstract = {Plant photosynthesis tends to increase with irradiance. However, recent theoretical and observational studies have demonstrated that photosynthesis is also more efficient under diffuse light conditions1, 2, 3, 4, 5. Changes in cloud cover or atmospheric aerosol loadings, arising from either volcanic or anthropogenic emissions, alter both the total photosynthetically active radiation reaching the surface and the fraction of this radiation that is diffuse, with uncertain overall effects on global plant productivity and the land carbon sink. Here we estimate the impact of variations in diffuse fraction on the land carbon sink using a global model modified to account for the effects of variations in both direct and diffuse radiation on canopy photosynthesis. We estimate that variations in diffuse fraction, associated largely with the 'global dimming' period6, 7, 8, enhanced the land carbon sink by approximately one-quarter between 1960 and 1999. However, under a climate mitigation scenario for the twenty-first century in which sulphate aerosols decline before atmospheric CO2 is stabilized, this 'diffuse-radiation' fertilization effect declines rapidly to near zero by the end of the twenty-first century.}, author = {Mercado, Lina M. and Bellouin, Nicolas and Sitch, Stephen and Boucher, Olivier and Huntingford, Chris and Wild, Martin and Cox, Peter M.}, citeulike-article-id = {4383912}, citeulike-linkout-0 = {http://dx.doi.org/10.1038/nature07949}, citeulike-linkout-1 = {http://dx.doi.org/10.1038/nature07949}, day = {23}, doi = {10.1038/nature07949}, issn = {0028-0836}, journal = {Nature}, keywords = {aerosol, carbon, climate, insolation, radiation, terrestrial, vegetation}, month = {April}, number = {7241}, pages = {1014--1017}, posted-at = {2009-11-09 16:32:17}, priority = {2}, publisher = {Nature Publishing Group}, title = {Impact of changes in diffuse radiation on the global land carbon sink}, url = {http://dx.doi.org/10.1038/nature07949}, volume = {458}, year = {2009} }

TY - JOUR ID - citeulike:4383912 L3 - citeulike-article-id:4383912 N2 - Plant photosynthesis tends to increase with irradiance. However, recent theoretical and observational studies have demonstrated that photosynthesis is also more efficient under diffuse light conditions1, 2, 3, 4, 5. Changes in cloud cover or atmospheric aerosol loadings, arising from either volcanic or anthropogenic emissions, alter both the total photosynthetically active radiation reaching the surface and the fraction of this radiation that is diffuse, with uncertain overall effects on global plant productivity and the land carbon sink. Here we estimate the impact of variations in diffuse fraction on the land carbon sink using a global model modified to account for the effects of variations in both direct and diffuse radiation on canopy photosynthesis. We estimate that variations in diffuse fraction, associated largely with the 'global dimming' period6, 7, 8, enhanced the land carbon sink by approximately one-quarter between 1960 and 1999. However, under a climate mitigation scenario for the twenty-first century in which sulphate aerosols decline before atmospheric CO2 is stabilized, this 'diffuse-radiation' fertilization effect declines rapidly to near zero by the end of the twenty-first century. IS - 7241 JF - Nature SN - 0028-0836 EP - 1017 TI - Impact of changes in diffuse radiation on the global land carbon sink PB - Nature Publishing Group VL - 458 SP - 1014 KW - aerosol KW - carbon KW - climate KW - insolation KW - radiation KW - terrestrial KW - vegetation AU - Mercado, Lina AU - Bellouin, Nicolas AU - Sitch, Stephen AU - Boucher, Olivier AU - Huntingford, Chris AU - Wild, Martin AU - Cox, Peter PY - 2009/04/23/ UR - http://dx.doi.org/10.1038/nature07949 ER -