气候变化领域集成服务门户(CCPortal): Spatio-temporal variability of the annual and monthly extreme temperature indices in Nepal

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DOI	10.1002/joc.6499
	Spatio-temporal variability of the annual and monthly extreme temperature indices in Nepal
	Poudel, Arati; Cuo, Lan; Ding, Jin; Gyawali, Ayush Raj
通讯作者	Cuo, L (通讯作者)
发表日期	2020
ISSN	0899-8418
EISSN	1097-0088
起始页码	4956
结束页码	4977
卷号	40 期号:11
英文摘要	Investigating the changes in the extreme temperature indices is crucial for the assessment of climate change and to recommend practical adaptation strategies particularly in countries like Nepal, which is highly prone to the impacts of extreme climatic events. This study analyses the mean temperatures and the changes of extreme temperature indices at 25 stations located in different physiographic regions in Nepal at monthly and annual time scales for 1986-2015. Ten extreme temperature indices recommended by ETCCDI are selected and examined. Quality control is first conducted for original daily maximum and minimum temperature data. In Nepal, it is warming in general with maximum temperature (0.04 degrees C year(-1)) increasing faster than minimum temperature (0.02 degrees C year(-1)) on countrywide average which is contrary to the changes in the Tibetan Plateau and its surroundings and the global average. The changes in extreme temperatures are spatiotemporally heterogeneous and unique. Annually, cold extremes increase but the percentage of days below 10th percentile becomes less frequent. Terai and Siwalik plain regions show negative annual trends in cold indices (TNn and TXn), but mixed changes in other extreme indices. There are strong correlations between the trends of maximum temperature-related variables and elevation. This analysis also adds the evidence of pronounced warming in higher elevation only for day-time extreme temperatures but not for temperature minima in Nepal which differs from the other studies around the world. This study also reveals that December and January tend to have colder days in the Terai. However, summer months are getting hotter in each region across the country. Kathmandu, the most urbanized city in Nepal shows a significant increase in minimum temperature (T-min) and minimum T-min (TNn) indicating the influence of urbanization in temperature change - an urban heat island effect.
关键词	RIVER-BASIN PRECIPITATION EXTREMES CLIMATE-CHANGE TRENDS HIMALAYA 20TH-CENTURY 2ND-HALF VICINITY PACIFIC REGIONS
英文关键词	climate change; elevation-dependent warming; extreme temperature indices; Nepal; spatiotemporal changes
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000511562100001
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/259749
推荐引用方式 GB/T 7714	Poudel, Arati,Cuo, Lan,Ding, Jin,et al. Spatio-temporal variability of the annual and monthly extreme temperature indices in Nepal[J]. 中国科学院青藏高原研究所,2020,40(11).
APA	Poudel, Arati,Cuo, Lan,Ding, Jin,&Gyawali, Ayush Raj.(2020).Spatio-temporal variability of the annual and monthly extreme temperature indices in Nepal.INTERNATIONAL JOURNAL OF CLIMATOLOGY,40(11).
MLA	Poudel, Arati,et al."Spatio-temporal variability of the annual and monthly extreme temperature indices in Nepal".INTERNATIONAL JOURNAL OF CLIMATOLOGY 40.11(2020).