DOI: 10.1002/joc.5357
论文题名: Classification of precipitation regimes in Pakistan using wet and dry spells
作者: Nabeel A. ; Athar H.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 5 起始页码: 2462
结束页码: 2477
语种: 英语
英文关键词: APHRODITE
; aridity index
; Pakistan
; precipitation regimes
; spell slope difference
; weather station data
; wet and dry spells
Scopus关键词: Classification (of information)
; Drought
; Precipitation (meteorology)
; Weather information services
; APHRODITE
; Aridity index
; Pakistan
; Precipitation regimes
; Spell slope difference
; Weather stations
; Wet and dry
; Data integration
英文摘要: Wet (dry) spells can cause extreme climatic conditions, such as floods (droughts) which can adversely influence the natural resources. A spatio-temporal analysis of observed wet and dry spells is carried out for vulnerable and data sparse region of Pakistan (24°–38°N and 61°–78°E). Observed monthly precipitation data sets from 46 weather station are used for a length of consecutive 32 years (1976−2007). Additionally, after bias adjustment, the Asian Precipitation Highly-Resolved Observational Data Integration Towards Evaluation (APHRODITE) precipitation data set, abbreviated as APH, is utilized to corroborate the findings. For both data sets, a threshold of 1 mm is used to define a wet spell. Decadal variability of precipitation for observed and APH data sets indicates that there is gradual decrease in wet spell length for arid and humid regimes, as compared to semi-arid regimes where there is no change in wet spell length. Monthly dry and wet slope difference (SD), on a log–log plot between number of spells and spell length, is used to classify precipitation regimes in Pakistan, for the first time. A weather station is categorized as humid if SD is less than −2.38 in units of number of spells per length of spells. If SD lies between −2.37 and −0.51, then the weather station is classified as semi-arid and if SD is greater than −0.51, then it is classified as arid. Thus, according to SD classification, 66% of area in Pakistan is arid, whereas 30% (4%) is semi-arid (humid). Comparison of precipitation regimes based upon observed and APH data sets with other climate classification schemes that involve both precipitation and temperature is presented. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117008
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan
Recommended Citation:
Nabeel A.,Athar H.. Classification of precipitation regimes in Pakistan using wet and dry spells[J]. International Journal of Climatology,2018-01-01,38(5)