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Observed high-altitude warming and snow cover retreat over Tibet and the Himalayas enhanced by black carbon aerosols

Journal Article · · Atmospheric Chemistry and Physics (Online)

Abstract. Himalayan mountain glaciers and the snowpack over the Tibetan Plateau provide the headwater of several major rivers in Asia. In situ observations of snow cover extent since the 1960s suggest that the snowpack in the region have retreated significantly, accompanied by a surface warming of 2–2.5 °C observed over the peak altitudes (5000 m). Using a high-resolution ocean–atmosphere global climate model and an observationally constrained black carbon (BC) aerosol forcing, we attribute the observed altitude dependence of the warming trends as well as the spatial pattern of reductions in snow depths and snow cover extent to various anthropogenic factors. At the Tibetan Plateau altitudes, the increase in atmospheric CO2 concentration exerted a warming of 1.7 °C, BC 1.3 °C where as cooling aerosols cause about 0.7 °C cooling, bringing the net simulated warming consistent with the anomalously large observed warming. We therefore conclude that BC together with CO2 has contributed to the snow retreat trends. In particular, BC increase is the major factor in the strong elevation dependence of the observed surface warming. The atmospheric warming by BC as well as its surface darkening of snow is coupled with the positive snow albedo feedbacks to account for the disproportionately large role of BC in high-elevation regions. These findings reveal that BC impact needs to be properly accounted for in future regional climate projections, in particular on high-altitude cryosphere.

Research Organization:
University Corporation for Atmospheric Research, Boulder, CO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
FC02-97ER62402
OSTI ID:
1236999
Alternate ID(s):
OSTI ID: 1253624
Journal Information:
Atmospheric Chemistry and Physics (Online), Journal Name: Atmospheric Chemistry and Physics (Online) Journal Issue: 3 Vol. 16; ISSN 1680-7324
Publisher:
Copernicus Publications, EGUCopyright Statement
Country of Publication:
Germany
Language:
English

References (62)

Mineral dust impact on snow radiative properties in the European Alps combining ground, UAV, and satellite observations: MINERAL DUST ON SNOW IN THE ALPS journal June 2015
Bounding the role of black carbon in the climate system: A scientific assessment: BLACK CARBON IN THE CLIMATE SYSTEM journal June 2013
Observational constraints on Arctic Ocean clouds and radiative fluxes during the early 21st century: ARCTIC OCEAN CLOUD AND RADIATION CLIMATOLOGY journal July 2013
Estimating the radiative forcing of carbonaceous aerosols over California based on satellite and ground observations: CALIFORNIA CARBONACEOUS AEROSOL FORCING journal October 2013
Rapid warming in the Tibetan Plateau from observations and CMIP5 models in recent decades: OBSERVATION AND SIMULATIONS OF WARMING journal October 2015
Improving the treatment of the vertical snow burial fraction over short vegetation in the NCAR CLM3 journal September 2009
Light-absorbing particles in snow and ice: Measurement and modeling of climatic and hydrological impact journal November 2014
Asian summer monsoon anomalies induced by aerosol direct forcing: the role of the Tibetan Plateau journal February 2006
The contribution of snow condition trends to future ground climate journal February 2009
MODIS/Terra observed snow cover over the Tibet Plateau: distribution, variation and possible connection with the East Asian Summer Monsoon (EASM) journal November 2008
Estimated range of black carbon dry deposition and the related snow albedo reduction over Himalayan glaciers during dry pre-monsoon periods journal October 2013
Cryospheric change in China journal June 2008
Elevation dependency of recent and future minimum surface air temperature trends in the Tibetan Plateau and its surroundings journal August 2009
20th-Century Changes of Temperature in the Mountain Regions of Central Europe journal July 1997
Temporal trends and variability of daily maximum and minimum, extreme temperature events, and growing season length over the eastern and central Tibetan Plateau during 1961–2003 journal January 2006
Observational relationships between aerosol and Asian monsoon rainfall, and circulation journal January 2006
Present-day climate forcing and response from black carbon in snow journal January 2007
Responses of permafrost to climate change and their environmental significance, Qinghai-Tibet Plateau journal January 2007
MODIS/Terra observed seasonal variations of snow cover over the Tibetan Plateau journal January 2007
Impact of disturbed desert soils on duration of mountain snow cover journal January 2007
A global monthly land surface air temperature analysis for 1948–present journal January 2008
An observation-based formulation of snow cover fraction and its evaluation over large North American river basins journal January 2007
Tibetan Plateau warming and precipitation changes in East Asia journal January 2008
Investigating cloud absorption effects: Global absorption properties of black carbon, tar balls, and soil dust in clouds and aerosols: CLOUD ABSORPTION EFFECTS journal March 2012
Parameterization improvements and functional and structural advances in Version 4 of the Community Land Model journal January 2011
Black carbon and other light-absorbing impurities in snow across Northern China: LIGHT-ABSORBING IMPURITIES IN SNOW journal February 2013
Albedo of soot-contaminated snow journal January 1983
Warming trends in Asia amplified by brown cloud solar absorption journal August 2007
Black-carbon reduction of snow albedo journal March 2012
Communication of the role of natural variability in future North American climate journal October 2012
Elevation-dependent warming in mountain regions of the world journal April 2015
Radiative forcing and albedo feedback from the Northern Hemisphere cryosphere between 1979 and 2008 journal January 2011
Global and regional climate changes due to black carbon journal March 2008
Atmospheric brown clouds: Impacts on South Asian climate and hydrological cycle journal March 2005
Black soot and the survival of Tibetan glaciers journal December 2009
Solar absorption by elemental and brown carbon determined from spectral observations journal October 2012
End of the Little Ice Age in the Alps forced by industrial black carbon journal September 2013
Observational determination of albedo decrease caused by vanishing Arctic sea ice journal February 2014
Enhanced surface warming and accelerated snow melt in the Himalayas and Tibetan Plateau induced by absorbing aerosols journal April 2010
Darkening of the mid-Himalaya glaciers since 2000 and the potential causes journal January 2012
A Reconciled Estimate of Glacier Contributions to Sea Level Rise: 2003 to 2009 journal May 2013
Maximum and Minimum Temperature Trends for the Globe journal July 1997
The Effects of Doubling the CO 2 Concentration on the climate of a General Circulation Model journal January 1975
A Model for the Spectral Albedo of Snow. I: Pure Snow journal December 1980
Effects of Black Carbon Aerosols on the Indian Monsoon journal June 2008
A New Two-Moment Bulk Stratiform Cloud Microphysics Scheme in the Community Atmosphere Model, Version 3 (CAM3). Part I: Description and Numerical Tests journal August 2008
Nonlinear Climate and Hydrological Responses to Aerosol Effects journal March 2009
The Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability journal August 2015
Climate Change Projections in CESM1(CAM5) Compared to CCSM4 journal September 2013
Temporal-spatial characteristics of observed key parameters of snow cover in China during 1957-2009 journal January 2012
Black carbon aerosols and the third polar ice cap journal January 2010
Historical (1850–2000) gridded anthropogenic and biomass burning emissions of reactive gases and aerosols: methodology and application journal January 2010
Sensitivity studies on the impacts of Tibetan Plateau snowpack pollution on the Asian hydrological cycle and monsoon climate journal January 2011
Simulating black carbon and dust and their radiative forcing in seasonal snow: a case study over North China with field campaign measurements journal January 2014
Snow cover sensitivity to black carbon deposition in the Himalayas: from atmospheric and ice core measurements to regional climate simulations journal January 2014
Ocean mediation of tropospheric response to reflecting and absorbing aerosols journal January 2015
Quantifying sources, transport, deposition, and radiative forcing of black carbon over the Himalayas and Tibetan Plateau journal January 2015
Springtime warming and reduced snow cover from carbonaceous particles journal January 2009
Toward a minimal representation of aerosols in climate models: description and evaluation in the Community Atmosphere Model CAM5 journal January 2012
Precipitation and snow cover in the Himalaya: from reanalysis to regional climate simulations journal January 2013
The impact of Saharan dust and black carbon on albedo and long-term mass balance of an Alpine glacier journal January 2015
Black carbon in snow in the upper Himalayan Khumbu Valley, Nepal: observations and modeling of the impact on snow albedo, melting, and radiative forcing journal January 2015