Brown Carbon From Biomass Burning Reinforces the Himalayas and Tibetan Plateau Warming

被引:0
作者
Zhu, Chong-Shu [1 ,2 ,3 ]
Qu, Yao [1 ,2 ,4 ]
Huang, Hong [5 ]
Shi, Ju-Lian [1 ,6 ]
Dai, Wen-Ting [1 ,2 ,3 ]
Zhang, Ning-Ning [1 ,2 ,3 ]
Wang, Nan [1 ,2 ,6 ]
Wang, Lu-Yao [1 ,2 ,6 ]
Ji, Sha-Sha [1 ,2 ,6 ]
Cao, Jun-Ji [1 ,2 ,7 ]
机构
[1] Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, SKLLQG, Xian, Peoples R China
[2] Chinese Acad Sci, Inst Earth Environm, KLACP, Xian, Peoples R China
[3] Natl Observat & Res Stn Reg Ecol Environm Change &, Xian, Peoples R China
[4] Univ Chinese Acad Sci, Beijing, Peoples R China
[5] Nanchang Univ, Sch Resources & Environm, Nanchang, Peoples R China
[6] Xian Inst Innovat Earth Environm Res, Xian, Peoples R China
[7] Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
brown carbon; light absorption coefficient; biomass burning; the Himalayas and Tibetan Plateau; LIGHT-ABSORPTION PROPERTIES; ORGANIC AEROSOL; BLACK CARBON; WINTER; WATER; ATMOSPHERE; EMISSION; EXTRACTS; CHINA; URBAN;
D O I
10.1029/2023GL107269
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Himalayas and Tibetan Plateau (the HTP), referred to as "the third pole" with an excessive warming rate, exerts strong impacts on the global environment. As one of warming contributors, atmospheric brown carbon (BrC) remains limited scientific understanding in the HTP due to a scarcity of observations. In this study, we present a study of the light-absorbing properties of methanol-soluble brown carbon (MeS-BrC) and water-soluble brown carbon (WS-BrC) during 2018-2021. Highly spatiotemporal variations of BrC light absorptions were observed. In the HTP marginal area, elevated BrC absorption coefficients at 365 nm (babs,365) and levoglucosan concentrations were obtained, and MeS-BrC exhibits approximately 1.3-1.8 times higher absorption compared to WS-BrC. We determined that BrC light absorptions was largely attributed to biomass burning (29%-35%). BrC can act as a potent warming agent in the HTP marginal area, with high direct solar absorption (25%-47% relative to black carbon). Atmospheric brown carbon (BrC) remains low scientific understanding in the HTP due to a scarcity of observations. Here, we present a plateau-scale study of the light-absorbing properties of methanol-soluble brown carbon (MeS-BrC) and water-soluble brown carbon (WS-BrC) during the period of 2018-2021. This study highlights the contribution of BrC to the HTP warming. Higher BrC light absorption was observed in the HTP marginal area compared with the central HTP. Enhanced radiative absorption effect of WS-BrC was obtained in the HTP, with an annual average of similar to 25% compared with BC in Qinghai Lake and Ngari, and as high as 46.5% in Purang. The results confirmed the importance of BrC from biomass burning in contributing to light-absorbing aerosols in this region. Brown carbon (BrC) can be a strong warming agent in the marginal Himalayas and Tibetan Plateau Highly spatiotemporal variations of plateau-scale BrC were observed BrC light absorptions was largely attributed to biomass burning
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页数:9
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