Modeling of solar radiation management: a comparison of simulations using reduced solar constant and stratospheric sulphate aerosols
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| 024 | 7 | 0 | |a 10.1007/s00382-014-2240-3 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00382-014-2240-3 | ||
| 245 | 0 | 0 | |a Modeling of solar radiation management: a comparison of simulations using reduced solar constant and stratospheric sulphate aerosols |h [Elektronische Daten] |c [Sirisha Kalidindi, Govindasamy Bala, Angshuman Modak, Ken Caldeira] |
| 520 | 3 | |a The climatic effects of Solar Radiation Management (SRM) geoengineering have been often modeled by simply reducing the solar constant. This is most likely valid only for space sunshades and not for atmosphere and surface based SRM methods. In this study, a global climate model is used to evaluate the differences in the climate response to SRM by uniform solar constant reduction and stratospheric aerosols. Our analysis shows that when global mean warming from a doubling of CO2 is nearly cancelled by both these methods, they are similar when important surface and tropospheric climate variables are considered. However, a difference of 1K in the global mean stratospheric (61-9.8hPa) temperature is simulated between the two SRM methods. Further, while the global mean surface diffuse radiation increases by ~23% and direct radiation decreases by about 9% in the case of sulphate aerosol SRM method, both direct and diffuse radiation decrease by similar fractional amounts (~1.0%) when solar constant is reduced. When CO2 fertilization effects from elevated CO2 concentration levels are removed, the contribution from shaded leaves to gross primary productivity (GPP) increases by 1.8% in aerosol SRM because of increased diffuse light. However, this increase is almost offset by a 15.2% decline in sunlit contribution due to reduced direct light. Overall both the SRM simulations show similar decrease in GPP (~8%) and net primary productivity (~3%). Based on our results we conclude that the climate states produced by a reduction in solar constant and addition of aerosols into the stratosphere can be considered almost similar except for two important aspects: stratospheric temperature change and the consequent implications for the dynamics and the chemistry of the stratosphere and the partitioning of direct versus diffuse radiation reaching the surface. Further, the likely dependence of global hydrological cycle response on aerosol particle size and the latitudinal and height distribution of aerosols is discussed. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2014 | ||
| 690 | 7 | |a Geoengineering |2 nationallicence | |
| 690 | 7 | |a Sulphate aerosols |2 nationallicence | |
| 690 | 7 | |a Stratospheric warming |2 nationallicence | |
| 690 | 7 | |a Diffuse radiation |2 nationallicence | |
| 690 | 7 | |a GPP |2 nationallicence | |
| 700 | 1 | |a Kalidindi |D Sirisha |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | |
| 700 | 1 | |a Bala |D Govindasamy |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | |
| 700 | 1 | |a Modak |D Angshuman |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | |
| 700 | 1 | |a Caldeira |D Ken |u Department of Global Ecology, Carnegie Institution, 260 Panama Street, 94305, Stanford, CA, USA |4 aut | |
| 773 | 0 | |t Climate Dynamics |d Springer Berlin Heidelberg |g 44/9-10(2015-05-01), 2909-2925 |x 0930-7575 |q 44:9-10<2909 |1 2015 |2 44 |o 382 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00382-014-2240-3 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00382-014-2240-3 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Kalidindi |D Sirisha |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Bala |D Govindasamy |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Modak |D Angshuman |u Divecha Centre for Climate Change and Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560 012, Bangalore, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Caldeira |D Ken |u Department of Global Ecology, Carnegie Institution, 260 Panama Street, 94305, Stanford, CA, USA |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Climate Dynamics |d Springer Berlin Heidelberg |g 44/9-10(2015-05-01), 2909-2925 |x 0930-7575 |q 44:9-10<2909 |1 2015 |2 44 |o 382 | ||