| 阿勒泰地区植被覆盖度及ET对气温变化的响应 |
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| 引用本文： | 韩飞飞,闫俊杰,郭斌.阿勒泰地区植被覆盖度及ET对气温变化的响应[J].干旱区地理,2019,42(6):1436-1444. |
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| 作者姓名： | 韩飞飞 闫俊杰 郭斌 |
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| 作者单位： | 石河子大学水利建筑工程学院,新疆石河子,832003;伊犁师范大学资源与生态研究所,新疆 伊宁,835000;山东科技大学测绘科学与工程学院,山东青岛,266590 |
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| 基金项目： | 国家自然科学基金项目(31360101) |
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| 摘 要： | 研究气温对植被覆盖度和ET (Evapotranspiration，ET)的影响，对干旱区应对气候变化、维系生态系统稳定具有重要意义。基于阿勒泰地区及周边7个气象站，CRU数据集中的气温数据及MODIS ET数据，采用Mann-Kendall非参数检验、植被盖度反演等方法，对阿勒泰地区气温变化对植被覆盖度及ET的影响进行了研究。结果表明：（1）在1901—2016年过去的116 a间，阿勒泰地区年平均气温以0.18 ℃·(10 a)-1速率增加，在1982年由突变前的2.2 ℃增加到突变后的3.5 ℃。（2）2000—2017年阿勒泰地区植被覆盖度变化的空间差异明显，植被覆盖度增加的面积与降低的面积总体相当；全区66.71%的区域植被覆盖度变化与气温呈负相关，而呈正相关的比例仅占18.55%，且全区气温变暖而盖度降低区域的占比达31.71%。（3）2000—2016年阿勒泰地区ET总体呈降低趋势，整个区域61.65%的面积温度降低、ET降低，而19.92%的区域表现为温度增加而植被ET降低。
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| 关 键 词： | 气温变化 蒸散发 生态系统 Mann-Kendall检验 阿勒泰地区 |
| 收稿时间： | 2019-11-18 |
Response of vegetation cover and ET to temperature variation in Altay Prefecture |
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| HAN Fei-fei,YAN Jun-jie,GUO Bin.Response of vegetation cover and ET to temperature variation in Altay Prefecture[J].Arid Land Geography,2019,42(6):1436-1444. |
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| Authors: | HAN Fei-fei YAN Jun-jie GUO Bin |
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| Abstract: | Studying the impact of temperature on vegetation coverage and evapotranspiration is of great significance to cope with climate variation and maintain the healthy operation of ecosystem in arid areas. Based on the Mann-Kendall non-parametric test and the FVC inversion method, the characteristics of climate variation in Altay Prefecture, Xinjiang, China was studied to investigate the impact of this climate change on the vegetation coverage and evapotranspiration, using the temperature data from seven meteorological stations and CRU data sets for the region. The results showed as follows: (1) During the past 116 years from 1901 to 2016,the annual average temperature in Altay region was increased at the rates of 0.18 ℃·(10 a)-1. An abrupt change of the annual mean temperature occurred in 1982 which made the accumulated change of the annual mean temperature increased by 2.2 ℃ before this year and an increase by 3.5 ℃ after it. (2) From 2000 to 2017, the vegetation coverage in Altay region showed a weak increasing trend. During the past 18 years, there were obviously peak values and the lowest value was 0.31 in 2008.In addition, before 2008,the annual fluctuation of vegetation coverage was significantly weaker than that after 2008.The change of vegetation coverage was negatively correlated with temperature in most areas of Altay, with a high proportion of 66.71%,but the proportion of positive correlation was only 18.55%,and the areas with temperature increase but a vegetation coverage reduction accounted for 31.71% of the whole area. (3) From 2000 to 2016, vegetation evapotranspiration in Altay region showed a decreasing trend in general, and there is an obvious decreasing trend from 2003 to 2008.In 2008, the lowest value is 179.16 mm. Although there has been an increase sign since 2008, the inter-annual fluctuations have been intensified. As a result, the overall vegetation evapotranspiration in Altay presents a decreasing tread from 2000 to 2016.Throughout the region, the areas with temperature decrease and ET reduction accounted for 61.65%, and a proportion of 19.92% of presented the phenomenon with temperature increase but ET reduction. |
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| Keywords: | serif temperature variation" target="_blank">">temperature variation evapotranspiration ecosystem the Mann-Kendall test Altay Prefecture |
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