气候变化背景下1958—2017年陕西省0 cm地温时空变化特征

doi:10.13866/j.azr.2021.05.06

Abstract

Abstract:

We analyzed the temporal and spatial variation characteristics of 0 cm surface temperature in Shaanxi Province during 1958 to 2017 based on monthly surface and air temperature data from 18 meteorological observation stations, by using linear fitting, Mann-Kendall nonparametric tests and spatial interpolation. The results indicated that annual and seasonal 0 cm surface temperature had a significant upward trend (P<0.01) except summer during 1958 to 2017 in Shaanxi Province. The climate tendency showed a trend as winter [0.42 ℃·(10a)^-1]>spring [0.38 ℃·(10a)^-1]>annual [0.27 ℃·(10a)^-1]>autumn [0.23 ℃·(10a)^-1]>summer [0.07 ℃·(10a)^-1]. We observed that the abrupt changes in annual and seasonal surface temperatures were concentrated at the end of 1990s. After the mutation, the largest warming range was in spring, followed by winter, annual, summer, and autumn. Moreover, we found that the annual and seasonal surface temperatures showed a spatial distribution of “high in the South and low in the north”. The annual, spring, and winter surface temperatures of all meteorological stations showed a significant upward trend (P<0.05), while 33% of stations in summer and 83% in autumn had the same characteristics. Additionally, annual and seasonal surface-air temperature difference showed an upward trend except summer during 1958 to 2017 in Shaanxi Province. The climate tendency showed a trend as winter [0.17 ℃·(10a)^-1]>spring [0.1 ℃·(10a)^-1]>annual [0.07 ℃·(10a)^-1, P<0.01]>autumn [0.02 ℃·(10a)^-1, P<0.01]>summer [-0.01 ℃·(10a)^-1]. Finally, there is a significant positive correlation between the annual average temperature, four seasons temperature and 0 cm surface temperature in Shaanxi Province in recent 60 years, which is characterized by autumn>spring>annual>summer>winter.

Key words: 0 cm surface temperature, temporal and spatial change, abrupt change, surface-air temperature difference, Shaanxi Province

XIAO Weiwei,AN Bin,SHI Jiaqi. Temporal and spatial characteristics of 0 cm surface temperature in Shaanxi Province during 1958 to 2017 under climate change[J].Arid Zone Research, 2021, 38(5): 1244-1253.

Figures/Tables 10

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References 17

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时间	突变时间	突变前平均值/℃	突变后平均值/℃	突变前后变化量/℃
春季	1997	14.761	16.459	1.698
夏季	2014	27.175	28.201	1.027
秋季	1993	12.546	13.256	0.710
冬季	1995	-0.796	0.662	1.457
年	1996	13.436	14.581	1.145

Temporal and spatial characteristics of 0 cm surface temperature in Shaanxi Province during 1958 to 2017 under climate change

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