MO Yueshuang, SUO Huiying, ZHAO Zongquan, et al. Variation Characteristics of Precipitation in Different Geomorphic Types in Guizhou Province in the Recent 59 Years[J]. 2020, 34(6): 46-52.
DOI:
MO Yueshuang, SUO Huiying, ZHAO Zongquan, et al. Variation Characteristics of Precipitation in Different Geomorphic Types in Guizhou Province in the Recent 59 Years[J]. 2020, 34(6): 46-52. DOI: 10.13870/j.cnki.stbcxb.2020.06.007.
Variation Characteristics of Precipitation in Different Geomorphic Types in Guizhou Province in the Recent 59 Years
Analyzing the temporal and spatial trends of climate change in Guizhou Province is of great significance for planning ecotourism development
environmental protection and disaster prevention in the region. Based on the monthly precipitation data from 17 sites in Guizhou Province during 1960 to 2018
methods of linear regression
moving average
ordered clustering
Mann—Kendall mutation test
and inverse distance weight interpolation were applied to analyze spatial and temporal characteristic of precipitation in Guizhou. The study showed that: In the past 59 years
Guizhou had a downward trend in precipitation
with a precipitation coefficient of -0.102. Although the annual precipitation in Karst valleys and non-karst areas was increasing
the trend was not significant. While other areas (karst troughs
peak-cluster depressions
Karst Plateau
and karst basins) showed all downtrend of precipitation
and the karst basin’s deceleration rate was -37.57 mm/10 a
which downtrend was the most significant
and it was 1.37~2.25 times of the other three regions. The annual precipitation descended at a rate of -16.50 mm/10 a
and annual precipitation tended to decrease from northeast to southwest in the space. The increase of precipitation in autumn and winter contributed the most to annual precipitation
while in spring and summer the precipitation showed a downtrend. Meanwhile the annual precipitation days and the maximum daily precipitation also showed a decreasing trend
the latter trend was most obvious after the 1980s so that the average maximum daily precipitation decreased to about 1/10 of that in the 1960s. In addition
the annual precipitation in non-karst areas and Karst Plateau changed abruptly from 1985 to 1986
and in karst basins the annual precipitation had a change in 2001 abruptly. There was no abrupt change in the annual precipitation in Karst troughs and peak-cluster depressions and Karst valleys.
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