气候变化领域集成服务门户(CCPortal): Evaluation of circulation-type classifications with respect to temperature and precipitation variations in the central and eastern Tibetan Plateau

CCPortal

DOI	10.1002/joc.5708
	Evaluation of circulation-type classifications with respect to temperature and precipitation variations in the central and eastern Tibetan Plateau
	Zhang, Xiaowen; Chen, Deliang; Yao, Tandong
发表日期	2018
ISSN	0899-8418
EISSN	1097-0088
卷号	38 期号:13
英文摘要	Circulation-type classifications (CTCs) are useful tools for systematically describing atmospheric circulation and studying its variation and impact on surface climate. However, few circulation classification methods (CCMs) have been applied in the Tibetan Plateau (TP). In this study, six frequently used CCMs using 500hPa geopotential height data were assessed with respect to their abilities in explaining observed daily mean temperature and precipitation variations in the central and eastern TP for the period 1980-2014. Two statistical measures, the explained variance and the Kolmogorov-Smirnov test, were used to quantify the performance of the CTCs in describing climate variable variations. SAN (simulated annealing and diversified randomization clustering) and KRZ (Kruizinga's eigenvector-based scheme) were identified as optimum CCMs for synoptic typing over the study region. The daily mean temperatures are well conditioned on SAN-CTC with 43.9-62.4% explained variance at annual scale and 11.1-25.2% at seasonal scale. For daily precipitation variations, the explained variance at the annual scale is less than 40%. The spatial characters of climate variation affected by large-scale circulation are identified. Daily mean temperature variations in the Qaidam Basin and the Qilian Mountains (90 degrees-103 degrees E and 35 degrees-40 degrees N) all year round and in the region between the Tanggula Mountains and the Himalayan Mountains (88 degrees-97 degrees E and 30 degrees-34 degrees N) in wet season (May-September) are well resolved by the CTCs. Daily precipitation variations in the eastern TP in the dry season (October-April) and a region from the Brahmaputra River basin to the Tanggula Mountains (85 degrees-92 degrees E and 28 degrees-32 degrees N) and the southern Hengduan Mountains (98 degrees-102 degrees E and 27 degrees-31 degrees N) in the wet season show a close relationship with the identified CTCs by SAN.
关键词	circulation classification COST733 precipitation synoptic climatology temperature Tibetan Plateau
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
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/111975
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaowen,Chen, Deliang,Yao, Tandong. Evaluation of circulation-type classifications with respect to temperature and precipitation variations in the central and eastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2018,38(13).
APA	Zhang, Xiaowen,Chen, Deliang,&Yao, Tandong.(2018).Evaluation of circulation-type classifications with respect to temperature and precipitation variations in the central and eastern Tibetan Plateau.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(13).
MLA	Zhang, Xiaowen,et al."Evaluation of circulation-type classifications with respect to temperature and precipitation variations in the central and eastern Tibetan Plateau".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.13(2018).