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孙秀云,刘海新,赵玉玲,杨楠楠,王炜.锡林郭勒盟草地物候期的时空演变及其对气候的响应[J].河北工程大学自然版,2019,36(2):79-82
锡林郭勒盟草地物候期的时空演变及其对气候的响应
Spatio-temporal evolution of grassland phenology and its response to meteorological factors in Xilin Gol League
投稿时间:2019-02-22  
DOI:10.3969/j.issn.1673-9469.2019.02.018
中文关键词:  锡林郭勒盟  NDVI  物候期  草地  气候因素
英文关键词:Xilin Gol League  NDVI  phenological phase  grassland  climatic factor
基金项目:河北省社会科学基金资助项目(HB18GL024)
作者单位
孙秀云 河北工程大学 矿业与测绘工程学院, 河北 邯郸 056038 
刘海新 河北工程大学 矿业与测绘工程学院, 河北 邯郸 056038 
赵玉玲 河北工程大学 矿业与测绘工程学院, 河北 邯郸 056038 
杨楠楠 河北工程大学 矿业与测绘工程学院, 河北 邯郸 056038 
王炜 河北工程大学 矿业与测绘工程学院, 河北 邯郸 056038 
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中文摘要:
      为揭示锡林郭勒盟草地的物候期变化趋势及其对气候因素的响应规律,基于2002-2014年的MODIS NDVI数据,采用双Logistics函数拟合和动态阈值相结合的方法提取了锡林郭勒盟草地的物候期,并对其时空演变特征及气候影响因素进行了分析和探讨。结果表明:(1)研究期内锡林郭勒盟草地返青期整体呈现提前趋势,枯黄期呈推迟趋势,生长期呈延长趋势。(2)研究区草地返青期与降水成显著负相关的面积占25.93%,与气温成显著负相关的面积占57.24%,与日照时数相关性不显著;草地枯黄期与气温呈显著负相关的面积占21.65%,与日照时数呈显著负相关的面积占22.24%,与降水的相关性不显著。
英文摘要:
      In order to reveal the trend of phenological period and the law of response to climatic factors in the grassland of Xilin Gol League, this paper extracted the phenological period of Xilin Gol League grassland by using the method of double logistic function fitting and dynamic threshold based on the MODIS-NDVI dataset from 2002 to 2014.This study investigated patterns of the spatiotemporal variations in phenology and its possible influence factors. The results show that:(1) During the research period, the grassland greenup of Xilin Gol League showed an early trend, the withering period showed a delayed trend, and the growth period showed an extended trend.(2)In the study area, 25.93% area of the Grassland greenup was negatively correlated with precipitation, 57.24% was negatively correlated with air temperature. Sunshine hours had no significant effect on the grassland greenup. 21.65% area of the Grassland withering period was negatively correlated with air temperature, 22.24% was negatively correlated with sunshine hours. Precipitation had no significant effect on the grassland withering period.
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