DOI: 10.1175/JCLI-D-15-0735.1
Scopus记录号: 2-s2.0-84983542250
论文题名: Investigations into precipitation and drought climatologies in south central Asia with special focus on Pakistan over the period 1951-2010
作者: Adnan S. ; Ullah K. ; Shouting G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 16 起始页码: 6019
结束页码: 6035
语种: 英语
Scopus关键词: Climatology
; Drought
; Financial data processing
; Precipitation (meteorology)
; Time series analysis
; Data similarity
; Drought periods
; Global precipitation
; Meteorological station
; Precipitation patterns
; Significance levels
; Spearman's rho
; Turning points
; Principal component analysis
英文摘要: The climatology of precipitation and drought are analyzed by using different indices in the region of south central Asia (SCA). The spatial precipitation pattern is delineated by using principal component analysis (PCA) over the period of 1951-2010, which identifies six subregions in the SCA. The monthly and annual trends of precipitation were analyzed by applying the five statistical tests: Student's t, Mann-Kendall, and Spearman's rho tests for linear trend and turning point analysis and Sen's slope for randomness and slope magnitude, respectively, at the α = 0.05 significance level. The time series analysis shows data similarity between Global Precipitation Climatology Centre (GPCC) and area-weighted precipitation of 52 meteorological stations in Pakistan, which results in a high correlation (R2 = 0.93). Two main drought periods were identified (1971 and 2000-02); also, 2001 was an extremely dry year in the SCA region. The drought in 1952 was the most severe in Pakistan; the longest drought period was 2000-02. Intense droughts were reported in the whole SCA region when the annual percent of precipitation was below 80%. It is noted that the A-5 region (northeast SCA), where 19 droughts were reported, is the most vulnerable. The monthly precipitation analysis shows a significant increasing trend in the months of September and June in the A-3 (northwest SCA) and A-5 regions, respectively, while a decreasing trend is observed in January and August in the A-4 region (east SCA). The decadal analysis shows significant decreasing trend (-21.5 mm decade-1) in region A-4, while the highest increasing trends (17.1 and 7.5 mm decade-1) are observed in Pakistan and the A-5 region respectively. © 2016 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50165
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Meteorology, COMSATS Institute of Information Technology, Pakistan Meteorological Department, Islamabad, Pakistan; Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan; Institute of Atmospheric Physics, Chinese Academy of Sciences, State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Recommended Citation:
Adnan S.,Ullah K.,Shouting G.. Investigations into precipitation and drought climatologies in south central Asia with special focus on Pakistan over the period 1951-2010[J]. Journal of Climate,2016-01-01,29(16)