Temperature and precipitation changes in different environments in the arid region of northwest China

摘要

Using 51 meteorological stations in the arid region of northwest China in the mountain, oasis, and the desert areas obtained from 1960 to 2010, this paper conducted a comparative analysis for detecting temperature and precipitation changes in the diverse environments. In recent 50 years, temperature has increased at 0.325, 0.339, and 0.360 ℃ per decade in the mountain, oasis, and the desert areas, respectively; and also, precipitation has increased at 10.15,6.29, and 0.87 mm per decade, but in which the increasing trend of precipitation in desert area was not significant. Before the 1990s, the increase in temperature was the fastest in the desert area, up to 0.214 ℃ per decade, but was the slowest in the mountain area, only 0.103 ℃ per decade. The temperature rising was faster after the 1990s, 0.606 ℃ per decade, in the oasis area was fastest, but was the slowest in the desert region with 0.402 ℃ per decade. The precipitation in each area was stable from 1960 to 1986, but an increase in the oasis and mountain area was larger from 1987 to 2010.