干旱区研究2026，Vol.43Issue(3)：465-477,13.DOI:10.13866/j.azr.2026.03.02
多时间尺度下中国西北气温和降水的时空变化
Spatiotemporal variations of temperature and precipitation in Northwest China across multiple timescales
摘要
Abstract
In this study,we investigate the spatiotemporal variation patterns of temperature and precipitation in Northwest China.A 1-km resolution monthly gridded dataset spanning 1960-2023 was employed.Various meth-ods,including linear regression,Theil-Sen median trend estimator,Mann-Kendall test,and Morlet wavelet trans-form,were used to quantitatively analyze the spatiotemporal characteristics.The results indicate the following.(1)Over the past 64 years,the annual mean temperature and precipitation in the region increased markedly,at rates of 0.28℃·(10a)-1 and 3.46 mm·(10a)-1,respectively.Seasonally,the most pronounced warming occurred in spring and the most notable increase in precipitation was observed in summer.(2)Spatially,areas exhibiting a highly pronounced increasing trend accounted for over 94％of the total region for annual and seasonal tempera-tures.Precipitation generally increased,but statistically significant trends were limited—only 34.96％annually,highest in winter(35.59％).(3)Wavelet analysis revealed multi-timescale periodic oscillations,with the first prin-cipal periods for annual temperature and precipitation being 10-16 a and 33-47 a,respectively.These findings provide a scientific basis for addressing climate change and supporting ecological security and sustainable devel-opment in Northwest China.关键词
气温/降水/时间特征/空间特征/周期特征/西北地区Key words
temperature/precipitation/temporal characteristics/spatial characteristics/periodic characteristics/Northwest China引用本文复制引用
杨米,杜凯,谭菲雪,马虎,张进虎,戎战磊..多时间尺度下中国西北气温和降水的时空变化[J].干旱区研究,2026,43(3):465-477,13.基金项目
青藏高原气温和降水的模式偏差订正及未来情景预估(2023-QLGKLYCZX-006) （2023-QLGKLYCZX-006）
