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Title: Black carbon radiative forcing over the Tibetan Plateau

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2014GL062191· OSTI ID:1402367
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3]
  1. Joint Institute for Regional Earth System Science and Engineering and Department of Atmospheric and Oceanic Sciences University of California Los Angeles, Los Angeles California USA
  2. Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China
  3. Pacific Northwest National Laboratory Richland Washington USA

Abstract We estimate the snow albedo forcing and direct radiative forcing (DRF) of black carbon (BC) in the Tibetan Plateau using a global chemical transport model in conjunction with a stochastic snow model and a radiative transfer model. The annual mean BC snow albedo forcing is 2.9 W m −2 averaged over snow‐covered plateau regions, which is a factor of 3 larger than the value over global land snowpack. BC‐snow internal mixing increases the albedo forcing by 40–60% compared with external mixing, and coated BC increases the forcing by 30–50% compared with uncoated BC aggregates, whereas Koch snowflakes reduce the forcing by 20–40% relative to spherical snow grains. The annual BC DRF at the top of the atmosphere is 2.3 W m −2 with uncertainties of −70–85% in the plateau after scaling the modeled BC absorption optical depth to Aerosol Robotic Network observations. The BC forcings are attributed to emissions from different regions.

Sponsoring Organization:
USDOE
OSTI ID:
1402367
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Vol. 41 Journal Issue: 22; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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