DOI: 10.1002/joc.5894
Scopus记录号: 2-s2.0-85055965442
论文题名: Observed changes in temperature extremes over China–Pakistan Economic Corridor during 1980–2016
作者: Ullah S. ; You Q. ; Ullah W. ; Ali A. ; Xie W. ; Xie X.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 3 起始页码: 1457
结束页码: 1475
语种: 英语
英文关键词: CPEC
; elevation-dependent warming
; Mann–Kendall test
; Sen's slope estimator
; temperature extremes
Scopus关键词: Climate change
; Least squares approximations
; Structural dynamics
; Testing
; Wind effects
; Atmospheric circulation changes
; CPEC
; Diurnal temperature ranges
; elevation-dependent warming
; Maximum and minimum temperatures
; Sen's slope estimators
; Spatial distribution of temperature
; Temperature extremes
; Atmospheric temperature
英文摘要: This study uses the daily maximum and minimum temperature data sets of 48 meteorological stations to assess the observed changes in temperature extremes over China–Pakistan Economic Corridor (CPEC) during 1980–2016. The nonparametric Mann–Kendall, Sen's slope estimator, least squares method, and two-tailed simple t-test methods were used to assess the trend in nine temperature extreme indices. The results of the study indicated that the trends in annual mean anomalies of cold nights, cold days, and frost days significantly decreased at the rates of −1.09, −1.58, and −1.05 day/decade, respectively. The number of warm nights, warm days, and summer days exhibited significant positive trends at the rates of 1.49, 1.04, and 4.32 day/decade, respectively. In addition, the trends of the warmest day and coldest day also increased significantly at the rates of 0.45 and 0.51 °C/decade, respectively. The trend of diurnal temperature range decreased significantly with −0.35 °C/decade. The spatial distribution of temperature extreme indices indicated that the number of cold nights, cold days, and diurnal temperature range have been decreased, while the trends of warm nights, warm days, summer days, warmest day, and coldest day have been increased over the whole country. Large-scale atmospheric circulation changes derived from ERA-Interim reanalysis show that a weak (strong) wind pressure, increasing (decreasing) geopotential height, and rapid warming (cooling) over the northern (southern) region have contributed to the changes in temperature extremes in Pakistan to some extent. With respect to elevation-dependent warming (EDW), the trends of cold nights, warm days, summer days, warmest day, and diurnal temperature range showed significant positive correlations with increasing elevation. However, the trends of cold days, warm nights, frost days, and coldest day showed significant negative relationships with increasing elevation. The findings of this study will be helpful in the adaptation of climate change and mitigation of climatological disasters in the region. The study recommends that future studies should investigate the natural and anthropogenic drivers of temperature extremes and the possible mechanism of EDW in the CPEC region. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116545
Appears in Collections: 全球变化的国际研究计划
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME); Joint International Research Laboratory of Climate and Environmental Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD); Earth System Modeling Center, Nanjing University of Information Science and Technology (NUIST), Nanjing, China; Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences, Fudan University, Shanghai, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), School of Geographical Sciences, Nanjing University of Information Science and Technology (NUIST), Nanjing, China; Centre for Disaster Preparedness and Management, University of Peshawar, Peshawar, Pakistan
Recommended Citation:
Ullah S.,You Q.,Ullah W.,et al. Observed changes in temperature extremes over China–Pakistan Economic Corridor during 1980–2016[J]. International Journal of Climatology,2019-01-01,39(3)