Authors: Qixiang Wang Mengben Wang Xiaohui Fan Feng Zhang Shizhong Zhu Tianliang Zhao
Publish Date: 2016/05/13
Volume: 129, Issue: 3-4, Pages: 949-963
Abstract
The spatial and temporal trends of 11 7 temperature precipitation extreme indices are examined for the Loess Plateau Region LPR and its southeast and northwest subregions based on daily observations at 214 meteorological stations Results show widespread significant warming trends for all the temperature extremes except for the diurnal temperature range DTR and the lowest daily maximum temperature in each year TXn during 1961–2010 When regionally averaged a significant warming trend is detected for all the indices except for DTR and TXn in the past 50 years Compared with the entire LPR a significant warming trend is detected for all the indices except for DTR and TXn over the southeast subregion of LPR while it is observed for all the indices over the northwest The trends for these indices are generally stronger in the northwest than in the southeast in the past 50 years In contrast for precipitation indices only a small percentage of areas show significant drying or wetting trends and when regionally averaged none of them displays significant trends during the past 50 years On the subregional scale however a larger percentage of areas show significant drying trends for precipitation indices generally over the southeast relative to the entire LPR and noticeably the subregional average heavy precipitation R10mm and wet day precipitation PRCPTOT display significant decreasing trends during the past 50 years whereas only a slightly larger percentage of areas show significant wetting trends for these indices over the northwest compared with the entire LPR and when subregionally averaged none of the indices have significant trends during the past 50 years
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