气候变化领域集成服务门户(CCPortal): Trend analysis of Climatic Research Unit temperature dataset for Gangotri glacier, India

CCPortal

DOI	10.1016/j.dynatmoce.2019.01.002
	Trend analysis of Climatic Research Unit temperature dataset for Gangotri glacier, India
	Verma P.; Ghosh S.K.
发表日期	2019
ISSN	03770265
起始页码	83
结束页码	97
卷号	85
英文摘要	The absence of continuous long term meteorological dataset has led to limited knowledge of glaciers’ response to climate change over Himalayas. This study presents an open source long term temperature dataset Climatic Research Unit (CRU) available since 1901 to study trend analysis of temperature (T max , T min and T mean ) for Gangotri basin in Himalayas. The study first establishes close agreement between CRU time series data and observed temperature dataset available from National Institute of Hydrology (NIH), Roorkee for a period of 11 years from 2005 to 2015 using standard anomaly, Wilcoxon Signed-Rank (WSR) and correlation tests. The close agreement of CRU with NIH data validate the use of CRU time series to study variation in meteorological parameter for hilly terrain of Himalayas. The second part includes application of different statistical tests such as Mann-Kendall (MK), Sen's slope and CUSUM technique on CRU data to detect existence of any possible trends and identification of change points in T max , T min and T mean on long term scale. On annual scale, significant increasing trends for T mean and T min were observed with no significant trend for T max . On seasonal and monthly scale, T max showed significant decreasing trend for monsoon season and increasing trend for winters while T min show significant increasing trend for all months (except May) and seasons. CUSUM technique identified 8 change points from 3 annual time series with 2 for T mean (1974 and 1999), 3 each for T max (1941, 1975 and 1999) and T min (1941, 1965 and 1999) respectively. Overall, significant increase in T min with no significant trend for T max has been identified over the study area. © 2019 Elsevier B.V.
英文关键词	CRU; CUSUM chart; Gangotri glacier; Mann-Kendall and Sen's slope test; Trend analysis; Wilcoxon signed-rank test
语种	英语
scopus关键词	Climate change; Time series; CUSUM chart; Gangotri glacier; Slope test; Trend analysis; Wilcoxon signed rank test; Statistical tests; climate change; correlation; data set; glacier; ranking; temperature; time series analysis; trend analysis; Gangotri Glacier; India; Uttarakhand
来源期刊	Dynamics of Atmospheres and Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178523
作者单位	Geomatics Engineering Group, Civil Engineering Department, IIT Roorkee247667, India
推荐引用方式 GB/T 7714	Verma P.,Ghosh S.K.. Trend analysis of Climatic Research Unit temperature dataset for Gangotri glacier, India[J],2019,85.
APA	Verma P.,&Ghosh S.K..(2019).Trend analysis of Climatic Research Unit temperature dataset for Gangotri glacier, India.Dynamics of Atmospheres and Oceans,85.
MLA	Verma P.,et al."Trend analysis of Climatic Research Unit temperature dataset for Gangotri glacier, India".Dynamics of Atmospheres and Oceans 85(2019).