气候变化领域集成服务门户(CCPortal): A new perspective on solar dimming over the Tibetan Plateau

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DOI	10.1002/joc.5807
	A new perspective on solar dimming over the Tibetan Plateau
	Lin, Changgui; Wu, Huanping; Ou, Tinghai; Chen, Deliang
通讯作者	Chen, DL (通讯作者)
发表日期	2019
ISSN	0899-8418
EISSN	1097-0088
起始页码	302
结束页码	316
卷号	39 期号:1
英文摘要	Solar radiation changes (dimming/brightening) have recently received growing attention within the research community, although there is currently no generally accepted explanation. This article aims to provide a new perspective for identifying the reasons behind solar dimming/brightening by using long-term measurements of direct and diffuse solar radiation, unlike previous studies which have focused on global solar radiation. We postulate that extinction processes can be more readily revealed by direct and diffuse radiation measurements with the help of a modelling tool that treats the two components separately. An example is presented for Golmud and Lhasa in the northern and southern Tibetan Plateau (TP) respectively, over the period 1957-2013. The following is found: (a) ground-based observed cloud cover alone hardly explains the observed solar dimming at the two sites; (b) both the cloud-free direct radiation transmittivity ((dir)) and diffuse radiation proportion (p(dif)) declined; (c) variations in p(dif) are overwhelmingly dominated by variations in aerosols, while those in (dir) are related to variations in both aerosol and water vapour; (d) on top of the suggested reduced aerosol concentrations, decreased snow cover can partly explain declined diffuse radiation via lowered surface albedo; (e) the decline in (dir) can be partly attributed to the wetting atmosphere via strengthened absorption; and (f) the impact of volcanic eruptions was also identified from such radiative parameters, lasting into the following summer and especially strong in the southern TP.
关键词	AEROSOL OPTICAL DEPTH VOLCANIC-ERUPTIONS RADIATION TRANSPORT SURFACE TRENDS CHINA WATER STRATOSPHERE IMPACTS
英文关键词	direct and diffuse radiation; extinction processes; Tibetan Plateau
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000459638400023
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259480
推荐引用方式 GB/T 7714	Lin, Changgui,Wu, Huanping,Ou, Tinghai,et al. A new perspective on solar dimming over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2019,39(1).
APA	Lin, Changgui,Wu, Huanping,Ou, Tinghai,&Chen, Deliang.(2019).A new perspective on solar dimming over the Tibetan Plateau.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(1).
MLA	Lin, Changgui,et al."A new perspective on solar dimming over the Tibetan Plateau".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.1(2019).