Regional scale analysis of climate extremes in an SRM geoengineering simulation, Part 2: temperature extremes

Muthyala, Rohi and Bala, Govindasamy and Nalam, Aditya (2018) Regional scale analysis of climate extremes in an SRM geoengineering simulation, Part 2: temperature extremes. In: CURRENT SCIENCE, 114 (5). pp. 1036-1045.

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Abstract

In this study, we examine the statistics of temperature extremes in a model simulation of solar radiation management (SRM) geoengineering. We consider both intensity and frequency-based extreme indices for temperature. The analysis is performed over both large-scale domains as well as regional scales (22 Giorgi land regions). We find that temperature extremes are substantially reduced in geoengineering simulation: the magnitude of change is much smaller than that occur in a simulation with elevated atmospheric CO2 alone. Large increase (similar to 10-20 K) in the lower tails (0.1 percentile) of T-min and T-max in the northern hemisphere extra-tropics that are simulated under doubling of CO2 are reduced in geoengineering simulation, but significant increase (similar to 4-7 K) persist over high-latitude land regions. Frequency of temperature extremes is largely offset over land regions in geoengineered climate. We infer that SRM schemes are likely to reduce temperature extremes and the associated impacts on a global scale. However, we note that a comprehensive assessment of moral, social, ethical, legal, technological, economic, political and governance issues is required for using SRM methods to counter the impacts of climate change.

Item Type:	Journal Article
Publication:	CURRENT SCIENCE
Publisher:	INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Additional Information:	Copy right for the article belong to INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change
Date Deposited:	02 Apr 2018 19:58
Last Modified:	02 Apr 2018 19:58
URI:	http://eprints.iisc.ac.in/id/eprint/59442

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