| 2000-2017年甘南牧区植被变化特征及其影响因子 |
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| 引用本文： | 敖泽建,王建兵,蒋友严,罗王军,赵慧珍.2000-2017年甘南牧区植被变化特征及其影响因子[J].新疆气象,2020,14(1):95-100. |
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| 作者姓名： | 敖泽建 王建兵 蒋友严 罗王军 赵慧珍 |
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| 作者单位： | 甘肃省甘南气象局,甘肃省甘南气象局,西北区域气候中心,甘肃省甘南气象局,甘肃省甘南气象局 |
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| 基金项目： | 甘肃省自然科学(1506 RJYA189);甘南草原植被变化及其与气象因子的关系研究项目(GNMA2018-01)资助 |
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| 摘 要： | 基于MOD13A3数据，建立2000-2017年甘南牧区植被覆盖时空数据集，分析了甘南牧区植被的时空分布及其变化特征，并利用同期气象数据探讨气象因子对其影响。结果表明，甘南牧区植被水平上呈南多北少的分布格局,与降水量分布基本一致；垂直分布上南部随海拔升高植被减少，北部随海拔升高植被增加。总体上，甘南牧区植被覆盖有增加趋势。气温、降水与日照时数是影响甘南牧区植被变化的重要因子，但2011年以后气温、降水及日照时数对植被变化的影响有所降低，其中5-6月降水量对亚高山草甸区植被变化的影响由显著正相关转为负相关。
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| 关 键 词： | 甘南牧区 归一化植被指数 气象因子 相关性 |
| 收稿时间： | 2018/12/10 0:00:00 |
| 修稿时间： | 2019/3/1 0:00:00 |
Characteristics of Vegetation Change and Its Influencing Factors in Gannan pastoral area from 2000 to 2017 |
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| Ao Zejian,Wang Jianbing,Jiang Youyan,Luo Wangjun and Zhao Huizhen.Characteristics of Vegetation Change and Its Influencing Factors in Gannan pastoral area from 2000 to 2017[J].Bimonthly of Xinjiang Meteorology,2020,14(1):95-100. |
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| Authors: | Ao Zejian Wang Jianbing Jiang Youyan Luo Wangjun and Zhao Huizhen |
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| Institution: | Gannan Meteorological Bureau of Gansu province,Gannan Meteorological Bureau of Gansu province,Northwest Regional Climate Center,Gannan Meteorological Bureau of Gansu province,Gannan Meteorological Bureau of Gansu province |
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| Abstract: | In this paper, the MOD13A3 data was used to investigate the vegetation coverage of Gannan pastoral area from 2000 to 2017,and then to analyze the climate response by using meteorological data. The results show that the horizontal pattern of vegetation in Gannan pastoral area is more in the south and less in the north, which is consistent with the spatial distribution of precipitation. The vertical distribution of the vegetation in the south decreases with the elevation, while the vegetation in the north increases with the elevation. The whole vegetation coverage in the Gannan pastoral area is increasing. Temperature, precipitation and sunshine hours are important factors affecting vegetation changes in Gannan pastoral area,but their impact on vegetation changes has decreased since 2011.The impact of human activities on vegetation changes may be increasing. The effect of precipitation from May to June on vegetation change in subalpine meadow changed from significant positive correlation to negative correlation. |
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| Keywords: | Gannan pastoral area NDVI Meteorological factors Correlation |
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