Title Black carbon aerosols and the third polar ice cap
Author Menon, S.; Koch, D.; Beig, G.; Sahu, S.; Fasullo, J.; Orlikowski, D.
Author Affil Menon, S., Lawrence Berkeley National Laboratory, Berkeley, CA. Other: Columbia University-NASA, Goddard Institute of Space Sciences; Indian Institute for Tropical Meteorology, India; National Center for Atmospheric Research; Lawrence Livermore National Laboratory
Source Atmospheric Chemistry and Physics, 10(10), p.4559-4571, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2010
Notes In English. Published in Atmospheric Chemistry and Physics Discussions: 11 December 2009, http://www.atmos-chem-phys- discuss.net/9/26593/2009/acpd-9-26593-2009.ht ml; accessed in May, 2011. 39 refs. GeoRef Acc. No: 310050
Index Terms aerosols; albedo; precipitation (meteorology); biomass; climatic change; clouds (meteorology); coal; glaciers; human activity; ice; models; snow; snow cover; Himalayas; Asia--Indian Peninsula; Asia; atmospheric precipitation; atmospheric transport; biochemistry; black carbon; climate change; climate forcing; clouds; glacial extent; Indian Peninsula; sedimentary rocks; solar forcing; sulfates; transport
Abstract Recent thinning of glaciers over the Himalayas (sometimes referred to as the third polar region) have raised concern on future water supplies since these glaciers supply water to large river systems that support millions of people inhabiting the surrounding areas. Black carbon (BC) aerosols, released from incomplete combustion, have been increasingly implicated as causing large changes in the hydrology and radiative forcing over Asia and its deposition on snow is thought to increase snow melt. In India BC emissions from biofuel combustion is highly prevalent and compared to other regions, BC aerosol amounts are high. Here, we quantify the impact of BC aerosols on snow cover and precipitation from 1990 to 2010 over the Indian subcontinental region using two different BC emission inventories. New estimates indicate that Indian BC emissions from coal and biofuel are large and transport is expected to expand rapidly in coming years. We show that over the Himalayas, from 1990 to 2000, simulated snow/ice cover decreases by ~0.9% due to aerosols. The contribution of the enhanced Indian BC to this decline is ~36%, similar to that simulated for 2000 to 2010. Spatial patterns of modeled changes in snow cover and precipitation are similar to observations (from 1990 to 2000), and are mainly obtained with the newer BC estimates.
URL http://www.atmos-chem-phys.net/10/4559/2010/acp-10-4559-2010.pdf
Publication Type journal article
Record ID 65006802