气候变化对土地沙漠化有一定驱动作用。以晋北沙漠化地区为研究区域，对1980-2014年影响该地区土地沙漠化的气候因子进行分析，采用气候变化倾向率、突变检验、滑动t检验、GIS空间模拟和插值等方法来探讨气候变化时空变化特征。结果表明：（1）1980-2014年，晋北沙漠化地区春季升温速率较大，气温整体呈缓慢上升趋势，年均气温从1980年6.37℃升高到2014年8.01℃，空间上呈现出由两边向中心逐渐减弱的趋势，并且在1990年存在明显增温突变，春夏季气温突变明显；（2）晋北沙漠化地区秋季降水增长幅度最为明显，年降水量整体呈现升高趋势，年降水量的倾向率均为正值，年降水量从1980年357.83mm升高到2014年403.82mm，降水量处于非突变的自然波动状态，稳定性较强，在空间上差异明显，由东北向西南逐渐增加；（3）年均风速呈逐年减小的趋势，春季风速从1980年3.25m·s-1降低到2014年2.48m·s-1，减小趋势最为明显，在空间上呈现由西北至东南逐渐增大的趋势。
Climate change is one of the main driving forces of the sandy desertification. In this study, we combined the climate trend rate, Mann-Kendall trend analysis, Slide t test, and Kriging spatial interpolation methods to explore the temporal and spatial variation of climate factors which influence sandy desertification in Northern Shanxi Province in 1980-2014. The results showed that: (1) The temperature in the area gradually increased in general. In spring, the increasing rate of temperature was more intensive. The annual mean temperature in the study area increased from 6.37℃ in 1980 to 8.01℃ in 2014. The spatial pattern indicated that the temperature increase in southern area was higher than in the northern area. The Mann-Kendall test of temperature showed that the warming mutation year was in 1990. (2) The seasonal precipitation presented a rising trend, especially in autumn. The annual mean precipitation in the area increased gradually from 357.83 mm in 1980 to 403.82 mm in 2014, with a positive tendency. The precipitation time series mutation test showed that there weren't significant mutation feature, and the distribution of precipitation increased gradually from northeast to southwest. (3) The wind speed decreased gradually from 3.25m·5s-1 in 1980 to 2.48 m·5s-1 in 2014, and with a significant decreasing trend in spring. The distribution of wind speed is lower in northwest and higher in southeast. The results could reveal the basic characteristics of the climate change in Northern Shanxi Province during the past 35 years, and provide scientific foundation for the desertification control in this area.
[1] 王涛,宋翔,颜长珍,等.近35 a来中国北方土地沙漠化趋势的遥感分析[J].中国沙漠,2011,31(6):1351-1356.
[2] 赵哈林,张铜会,崔建垣,等.近40 a我国北方农牧交错区气候变化及其与土地沙漠化的关系-以科尔沁沙地为例[J].中国沙漠,2000,20(增刊):2-7.
[3] 魏文寿,刘明哲.古尔班通古特沙漠现代沙漠环境与气候变化[J].中国沙漠,2000,20(2):178-184.
[4] 房世波,许端阳,张新时.毛乌素沙地沙漠化过程及其气候因子驱动分析[J].中国沙漠,2009,29(5):796-801.
[5] 马义娟,钱锦霞,苏志珠.晋西北地区气候变化及其对土地沙漠化的影响[J].中国沙漠,2011,31(6):1585-1589.
[6] 王孟本.山西省黄土高原地区综合治理规划研究[M].北京:中国林业出版社,2009:52-53.
[7] 魏凤英.现代气候统计诊断与预测技术[M].北京:气象出版社,1999:46-68.
[8] 符淙斌,王强.气候突变的定义和检测方法[J].大气科学,1992(4):482-493.
[9] 燕明达,宋孝玉,李怀有.砚瓦川流域1981-2012年降水特性及趋势分析[J].水资源与水工程学报,2014(3):116-124.
[10] Hamed K H. Trend detection in hydrologic data:the Mann-Kendall trend test under the scaling hypothesis[J].Journal of Hydrology,2008,349(S3/4):350-363.
[11] 刘抗,李照荣,张宇.1971-2010年中国西北地区秋季降水变化特征[J].中国沙漠,2014,34(3):805-813.
[12] 李芬,张建新,张荣.1958-2013年山西降水时空分布[J].中国沙漠,2015,35(5):1301-1311.
[13] 杨永康,梁建辉.开都河流域径流变化特征与突变分析[J].水利科技与经济,2015,21(10):84-86.
[14] 李双双,延军平,杨蓉,等.气候变暖背景下1961-2010年宁夏旱涝灾害空间分布特征和变化规律[J].中国沙漠,2013,33(5):1552-1559.
[15] 谭春萍,杨建平,秦大河,等.宁夏回族自治区持续性旱灾的气候背景[J].中国沙漠,2014,34(2):518-526.
[16] 刘洪兰,张强,张俊国,等.1960-2012年河西走廊中部沙尘暴空间分布特征和变化规律[J].中国沙漠,2014,34(4):1102-1108.
[17] 张德二,刘传志,江剑民.中国东部6区域近1000年干湿序列的重建和气候跃变分析[J].第四纪研究,1997,17(1):1-11.
[18] 于洋,卫伟,陈利顶,等.黄土高原年均降水量空间插值及其方法比较[J].应用生态学报,2015,26(4):999-1006.
[19] 秦作栋,王孟本,薛占金.晋北地区土地沙化现状及其成因分析[J].山西大学学报:自然科学版,2008,15(2):168-172.
[20] 任国玉,郭军,徐铭志,等.近50年中国地面气候变化基本特征[J].气象学报,2005,63(6):942-956.
[21] 施雅风,沈永平,李栋梁,等.中国西北气候由暖干向暖湿转型的特征和趋势探讨[J].第四纪研究,2003,23(2):152-164.
[22] 杨林海,周杰.历史时期气候变化和人类活动对毛乌素地区沙漠化的影响[J].干旱区资源与环境,2008,22(12):128-133.
[23] Xue Z,Qin Z,Li H,et al.Evaluation of aeolian desertification from 1975 to 2010 and its causes in northwest Shanxi Province,China[J].Global and Planetary Change,2013,107:102-108.
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