不同时间尺度下新疆气候“暖湿化”特征

doi:10.13866/j.azr.2022.02.01

Abstract

Abstract:

Based on the observed climatic and hydrological data in Xinjiang, China, and combined with the new results in recent years, the characteristics of “warming-wetting” trend in Xinjiang region from historical period to interdecadal scale were comprehensively analyzed and compared, and the evolution characteristics of “warming-wetting” trend in Xinjiang region were comprehensively evaluated at different spatial and temporal scales. The results show that: (1) according to the lake sediment and tree-ring reconstruction and wet climate change sequence, found the past climate in Xinjiang in one thousand and one hundred, scale is mainly a “dry-cold and warm-wet”, there is significant decadal variation characteristics, nearly a century of experience since 1980s the obvious “wet” process, but range is not beyond history the variability of each period. (2) the warming and wetting trend was occurred in the northern area, high latitudes in the northern hemisphere since 1961, the pattern is roughly the “T” type, Xinjiang is connected in high latitudes and link of the “wet” Qinghai-Tibet plateau region, the “warming-wetting” trend is not unique to Xinjiang, However, the climate humidification process in Xinjiang is unique in the middle latitude region. (3) The interannual temperature and humidity was dominated by “warm-wet-warm-dry” configuration in Xinjiang during 1961-2019. After the 1990s, the annual and seasonal temperature and humidity configurations were mostly warm and wet in Xinjiang. The rate of warming and humidification increases in each climate state period, but slows down in the current period, indicating that the warming and humidification trend has periodic characteristics and presents a nonlinear increase trend. Although there has been an obvious trend of “warming-wetting” trend in Xinjiang in the past 30 years, and the degree of warming has gradually increased, the absolute amount of precipitation increase is not large, and the current characteristics of humidification can not change the arid climate and arid area in Xinjiang. The research results provide an important scientific basis for the assessment of climate and “warming-wetting” trend in Xinjiang at different spatio-temporal scales.

Key words: dry-wet change, warming-wetting trend, warm-wet configuration, multi-scale pattern, Xinjiang

YAO Junqiang,LI Moyan,Dilinuer Tuoliewubieke,CHEN Jing,MAO Weiyi. The assessment on “warming-wetting” trend in Xinjiang at multi-scale during 1961-2019[J].Arid Zone Research, 2022, 39(2): 333-346.

Figures/Tables 9

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The assessment on “warming-wetting” trend in Xinjiang at multi-scale during 1961-2019

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