气候变化领域集成服务门户(CCPortal): Measurement of light-absorbing particles in surface snow of central and western Himalayan glaciers: spatial variability, radiative impacts, and potential source regions

CCPortal

DOI	10.5194/acp-22-8725-2022
	Measurement of light-absorbing particles in surface snow of central and western Himalayan glaciers: spatial variability, radiative impacts, and potential source regions
	Gul, Chaman; Kang, Shichang; Puppala, Siva Praveen; Wu, Xiaokang; He, Cenlin; Xu, Yangyang; Koch, Inka; Muhammad, Sher; Kumar, Rajesh; Dubache, Getachew
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	8725
结束页码	8737
卷号	22 期号:13 页码:13
英文摘要	We collected surface snow samples from three different glaciers - Yala, Thana, and Sachin - in the central and western Himalayas to understand the spatial variability and radiative impacts of light-absorbing particles. The Yala and Thana glaciers in Nepal and Bhutan, respectively, were selected to represent the central Himalayas. The Sachin glacier in Pakistan was selected to represent the western Himalayas. The samples were collected during the pre- and post-monsoon seasons of the year 2016. The samples were analyzed for black carbon (BC) and water-insoluble organic carbon (OC) through the thermal optical method. The average mass concentrations (BC 2381 ng g(-1); OC 3896 ng g(-1); dust 101 mu g g(-1)) in the western Himalayas (Sachin glacier) were quite high compared to the mass concentrations (BC 358 ng g(-1), OC 904 ng g(-1), dust 22 mu g g(-1)) in the central Himalayas (Yala glacier). The difference in mass concentration may be due to the difference in elevation, snow age, local pollution sources, and meteorological conditions. BC in surface snow was also estimated through Weather Research and Forecasting (WRF) model coupled with Chemistry (WRF-Chem) simulations at the three glacier sites during the sampling periods. Simulations reasonably capture the spatial and seasonal patterns of the observed BC in snow but with a relatively smaller magnitude. Absolute snow albedo was estimated through the Snow, Ice, and Aerosol Radiative (SNICAR) model. The absolute snow albedo reduction ranged from 0.48 % (Thana glacier during September) to 24 % (Sachin glacier during May) due to BC and 0.13 % (Yala glacier during September) to 5 % (Sachin glacier during May) due to dust. The instantaneous radiative forcing due to BC and dust was estimated in the range of 0 to 96.48 and 0 to 25 W m(-2), respectively. The lowest and highest albedo reduction and radiative forcing were observed in central and western Himalayan glaciers, respectively. The potential source regions of the deposited pollutants were inferred using WRF-Chem tagged-tracer simulations. Selected glaciers in the western Himalayas were mostly affected by long-range transport from the Middle East and central Asia; however, the central Himalayan glaciers were mainly affected by local and south Asia emissions (from Nepal, India, and China) especially during the pre-monsoon season. Overall, south Asia and west Asia were the main contributing source regions of pollutants.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000821465200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273553
作者单位	Chinese Academy of Sciences; Nanjing University of Information Science & Technology; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Texas A&M University System; Texas A&M University College Station; National Center Atmospheric Research (NCAR) - USA; Eberhard Karls University of Tubingen
推荐引用方式 GB/T 7714	Gul, Chaman,Kang, Shichang,Puppala, Siva Praveen,et al. Measurement of light-absorbing particles in surface snow of central and western Himalayan glaciers: spatial variability, radiative impacts, and potential source regions[J],2022,22(13):13.
APA	Gul, Chaman.,Kang, Shichang.,Puppala, Siva Praveen.,Wu, Xiaokang.,He, Cenlin.,...&Dubache, Getachew.(2022).Measurement of light-absorbing particles in surface snow of central and western Himalayan glaciers: spatial variability, radiative impacts, and potential source regions.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(13),13.
MLA	Gul, Chaman,et al."Measurement of light-absorbing particles in surface snow of central and western Himalayan glaciers: spatial variability, radiative impacts, and potential source regions".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.13(2022):13.