气候变化领域集成服务门户(CCPortal): Black carbon in a glacier and snow cover on the northeastern Tibetan Plateau: Concentrations, radiative forcing and potential source from local topsoil

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DOI	10.1016/j.scitotenv.2019.05.469
	Black carbon in a glacier and snow cover on the northeastern Tibetan Plateau: Concentrations, radiative forcing and potential source from local topsoil
	Li Y.; Kang S.; Chen J.; Hu Z.; Wang K.; Paudyal R.; Liu J.; Wang X.; Qin X.; Sillanpää M.
发表日期	2019
ISSN	00489697
卷号	686
英文摘要	Black carbon (BC), which consists of the strongest light-absorbing particles (LAP) in snow/ice, has been regarded as a potential factor accelerating the melting of glaciers and snow cover over the Third Pole. During the winter and summer of 2016, snow, ice and topsoil were sampled from the Laohugou basin located on the northeastern Tibetan Plateau. Concentrations of BC in Laohugou Glacier No. 12 (LG12) and snow cover in this basin (LSC) varied broadly (21.7–2700.1 and 89.6 to 6326.2 ng g−1, respectively), indicating large spatiotemporal variability in wet, dry and post depositional conditions. Further, internally mixed BC in snow grains enhanced the albedo reduction (15.0–26.3%) more than externally mixed BC in LG12 and LSC. Dust played a more important role than BC in accelerating the melting of LG12, whereas these components played comparable roles in accelerating the melting of LSC. In total, externally mixed BC and dust reduced the albedo by 0.075–0.423, with an associated mean radiative forcing (RF) of 97.5 ± 41.5 Wm−2 in LSC. This level was lower than those in the ablation zone (354.1 ± 81.2 Wm−2) and accumulation zone (145.6 ± 76.7 Wm−2) of LG12 because of discrepancies in LAP concentrations, solar zenith angles and incoming shortwave radiation. Furthermore, we observed that topsoil containing abundant BC was transported along the slope from the debris to the LG12 surface ice, and topsoil in this region could be lifted by strong mountain-valley winds and then deposited on snow/ice surfaces, which affected the LAP concentrations. Therefore, this study is important for understanding the role of BC and dust in the melting of snow/ice in the northeastern Tibetan Plateau. © 2019 Elsevier B.V.
英文关键词	Black carbon;Glacier;Local source;Radiative forcing;Snow cover;Tibetan Plateau
语种	英语
来源期刊	Science of the Total Environment
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89570
作者单位	(1)Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China;(2)State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China;(3)Laboratory of Green Chemistry, Lappeenranta University of Technology, Mikkeli, 50130, Finland;(4)CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100085, China;(5)University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Li Y.,Kang S.,Chen J.,et al. Black carbon in a glacier and snow cover on the northeastern Tibetan Plateau: Concentrations, radiative forcing and potential source from local topsoil[J]. 中国科学院西北资源环境生态研究院,2019,686.
APA	Li Y..,Kang S..,Chen J..,Hu Z..,Wang K..,...&Sillanpää M..(2019).Black carbon in a glacier and snow cover on the northeastern Tibetan Plateau: Concentrations, radiative forcing and potential source from local topsoil.Science of the Total Environment,686.
MLA	Li Y.,et al."Black carbon in a glacier and snow cover on the northeastern Tibetan Plateau: Concentrations, radiative forcing and potential source from local topsoil".Science of the Total Environment 686(2019).