石漠化影响下的局地气候响应研究
Local Climate Response to Rocky Desertification
DOI: 10.12677/CCRL.2022.114058, PDF,  被引量    国家自然科学基金支持
作者: 曹怡钦, 丁文荣*：云南师范大学地理学部，云南 昆明
关键词: 石漠化；气候响应；降水变化；气温变化；云南；Rocky Desertification； Climate Response； Precipitation Change； Temperature Change； Yunnan
摘要: 石漠化是严峻的生态环境问题，云南省是我国石漠化最为严重的省份之一。本文分别获取云南省石漠化、非石漠化区各5个站点的1970~2017年逐日降水量、年平均和月平均气温资料，采用变差系数Cv值、Theil-Sen Median趋势分析、Mann-Kendall检验，通过对比分析法，探究局地气候对石漠化的响应规律。结果表明：1) 石漠化区降水Cv值高于非石漠化区，降水波动性较非石漠化区更明显；2) 石漠化区RX5和RX1有增加的趋势，但最长持续降水时间却是减少的，最长干旱时间趋势仍然增加，石漠化区降水量与降水时长、干旱程度的变化并不一致，较非石漠化地区更为反常；3) 石漠化区RX5、RX1、CDD发生突变的时间以及变化趋势达显著的时间均早于非石漠化区，且石漠化区变化趋势较非石漠化区显著，石漠化区和非石漠化区CWD均在70年代开始有突变发生，石漠化区除耿马站点外均在90年代减少趋势达到显著；4) 石漠化地区年均温高于相对阈值的年份频数大于非石漠化地区，极端气温出现的频率较非石漠化区更高，石漠化区气温的Cv值高于非石漠化区，气温的年际波动更大，非石漠化区年均气温总体上呈现先下降后上升的变化趋势，而石漠化区年均气温变化趋势在上升和下降之间反复变化，较非石漠化区变化更剧烈。
Abstract: Rocky desertification is a severe ecological and environmental problem, Yunnan province is one of the most serious rocky desertification provinces in China. Daily precipitation, annual and monthly mean temperature data from 1970 to 2017 were obtained from 5 stations in rocky desertification and non-rocky desertification areas in Yunnan Province. Coefficient of variation Cv value, TheilSen Median trend analysis and Mann-Kendall test were used. The response of local climate to rocky desertification was studied by comparative analysis. The results show that: 1) The Cv value of precipitation in rocky desertification area is higher than that in non-rocky desertification area, and the precipitation fluctuation is more obvious than that in non-rocky desertification area. 2) RX5 and RX1 showed an increasing trend in the rocky desertification area, but the longest sustained precipitation time decreased, while the trend of the longest drought time still increased. Precipitation in the rocky desertification area was not consistent with the change of precipitation time and drought degree, which was more abnormal than that in the non-rocky desertification area. 3) The rocky desertification area RX5, RX1, CDD mutations of time and change trend of significant time is earlier than the non-rocky desertification area, and the trend of rocky desertification area change significantly from the non-rocky desertification area, rocky desertification area and the rocky desertification area CWD began to have a mutation in the 70 s, and the decreasing trend of rocky desertification area, in addition to the Gengma Station, was significant in the 90 s; 4) The annual average temperature in rocky desertification area is higher than that in non-rocky desertification area, and the frequency of extreme temperature is higher than that in non-rocky desertification area. The Cv value of temperature in rocky desertification area is higher than that in non-rocky desertification area, and the interannual fluctuation of temperature is larger. The annual average temperature in non-rocky desertification area shows a general trend of decreasing first and then increasing. However, the trend of annual average temperature in rocky desertification area changed repeatedly between rising and falling, which was more severe than that in non-rocky desertification area.
文章引用：曹怡钦, 丁文荣. 石漠化影响下的局地气候响应研究[J]. 气候变化研究快报, 2022, 11(4): 551-561. https://doi.org/10.12677/CCRL.2022.114058

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