spring,temperature,precipitation,climate change,spatiotemporal difference,Qinling Mountains,Shaanxi ,"/> <p class="MsoNormal"> <b>Climate Change in the Qinling Mountains in Spring during 1959-2018</b>

Arid Zone Research ›› 2019, Vol. 36 ›› Issue (5): 1079-1091.doi: 10.13866/j.azr.2019.05.04

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Climate Change in the Qinling Mountains in Spring during 1959-2018

QI Gui-zeng1, 2, BAI Hong-ying1, 2, MENG Qing1, 2, ZHAO Ting1, 2, GUO Shao-zhuang1, 2   

  1. 1.Northwest University, Xi’an 710127, China; 2.Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, Shaanxi,China
  • Received:2019-04-17 Revised:2019-06-06 Online:2019-09-15 Published:2019-09-11

Abstract: In this paper, the characteristics of climate change and future climate trend in the Qinling Mountains in spring were studied and predicted by using the linearity estimation, ANUSPLIN spatial interpolation method, Mann-Kendall test and R/S analysis based on the data of daily temperature and precipitation and the calculated SPEI data from 32 meteorological stations in the study area from 1959 to 2018. The results showed that:    There was a significant warming-drying trend in the Qinling Mountains in spring during the period of 1959-2018, and the fluctuation was not synchronized. The temperature increase rate in the study area in spring was 0.33 °C·(10a)-1, and the precipitation descending rate in the same season was 4.90 mm·(10a)-1. The SPEI value in the Qinling area in spring was in a significant downward trend with a decrease rate of 0.14·(10a)-1;    There was a spatial difference of the warming-drying trend in the Qinling Mountains, and the change was fast in the north but slow in the south. The temperature was in a significant increase trend in 99.65% pixels, the precipitation was in a significant decrease trend in 64.46% pixels, and the SPEI value was in a significant downward trend in 75.28% pixels. The areas sensitive to the climate change in spring were located in Baoji, Zhouzhi, Huxian and Chang’an in the north and Taibai, Zhashui and Zhen'an in the sourth;    The occurring frequency of drought was high and its level was serious during the period of 1994-2008, but the situation was alleviated after 2009. The occurring frequency of drought was high in the north and west, and low in the south and east. Such warming-drying climate trend in the Qinling Mountains in spring would continue in the future.

Key words:  spring')">

 spring, temperature, precipitation, climate change, spatiotemporal difference, Qinling Mountains, Shaanxi