气候变化领域集成服务门户(CCPortal): Variability in individual particle structure and mixing states between the glacier-snowpack and atmosphere in the northeastern Tibetan Plateau

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DOI	10.5194/tc-12-3877-2018
	Variability in individual particle structure and mixing states between the glacier-snowpack and atmosphere in the northeastern Tibetan Plateau
	Dong, Zhiwen; Kang, Shichang; Qin, Dahe; Shao, Yaping; Ulbrich, Sven; Qin, Xiang
发表日期	2018
ISSN	1994-0416
EISSN	1994-0424
卷号	12 期号:12
英文摘要	Aerosols affect the Earth's temperature and climate by altering the radiative properties of the atmosphere. Changes in the composition, morphological structure, and mixing state of aerosol components will cause significant changes in radiative forcing in the atmosphere. This work focused on the physicochemical properties of light-absorbing particles (LAPs) and their variability through deposition process from the atmosphere to the glacier-snowpack interface based on large-range observations in the northeastern Tibetan Plateau, and laboratory transmission electron microscope (TEM) and energy dispersive X-ray spectrometer (EDX) measurements. The results showed that LAP particle structures changed markedly in the snowpack compared to those in the atmosphere due to black carbon (BC) and organic matter (OM) particle aging and salt-coating condition changes. Considerably more aged BC and OM particles were observed in the glacier and snowpack surfaces than in the atmosphere, as the concentration of aged BC and OM varied in all locations by 4 %-16% and 12 %-25% in the atmosphere, whereas they varied by 25 %-36% and 36 %-48% in the glacier-snowpack surface. Similarly, the salt-coated particle ratio of LAPs in the snowpack is lower than in the atmosphere. Albedo change contribution in the Miaoergou, Yuzhufeng, and Qiyi glaciers is evaluated using the SNICAR model for glacier surface-distributed impurities. Due to the salt-coating state change, the snow albedo decreased by 16.7 %-33.9% compared to that in the atmosphere. Such a great change may cause more strongly enhanced radiative heating than previously thought, suggesting that the warming effect from particle structure and mixing change in glacier-snowpack LAPs may have markedly affected the climate on a global scale in terms of direct forcing in the cryosphere.
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	CRYOSPHERE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111941
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Dong, Zhiwen,Kang, Shichang,Qin, Dahe,et al. Variability in individual particle structure and mixing states between the glacier-snowpack and atmosphere in the northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2018,12(12).
APA	Dong, Zhiwen,Kang, Shichang,Qin, Dahe,Shao, Yaping,Ulbrich, Sven,&Qin, Xiang.(2018).Variability in individual particle structure and mixing states between the glacier-snowpack and atmosphere in the northeastern Tibetan Plateau.CRYOSPHERE,12(12).
MLA	Dong, Zhiwen,et al."Variability in individual particle structure and mixing states between the glacier-snowpack and atmosphere in the northeastern Tibetan Plateau".CRYOSPHERE 12.12(2018).