| 摘要: |
| 【目的】研究内蒙古植被返青期对气候变化的敏感性。【方法】基于1982—2013
年GIMMS NDVI 3g 数据，使用累积NDVI 的Logistic 曲线曲率极值法，线性趋势分析方
法，对内蒙古地区（除去荒漠植被稀少区）32 年间植被返青期进行识别和提取，分析内
蒙古植被返青期的时空变化规律，以及不同植被类型的返青期对气温、降水变化的响应。
【结果】（1）内蒙古植被返青期开始在4 月26 日至5 月23 日之间。（2）在1982—2013 年间
内蒙古植被返青期总体呈现推迟趋势，以2010 年为转折点，转折点之前返青期没有明显的
提前或推迟的现象；转折点之后，返青期呈现逐年推迟趋势。（3）内蒙古植被返青期与气象
因子的关系：4 月植被返青期与温度呈现负相关的面积占72.5%，4 月植被返青期和降水呈
现负相关的面积占55.9%，由此得出4 月温度升高和降水增加都会促进返青期提前。与降水
相比，返青期与温度的相关程度更高。（4）不同植被类型的返青期与温度、降水的相关关系：
森林区的返青期与4 月温度的相关性最为显著，通过了0.01 显著性检验水平。草地区的返
青期与4 月降水增加的相关性通过0.01 显著性检验水平。【结论】通过研究内蒙古植被返青
期的时空变化规律，探索植被返青期与气象因子的关系，为增强对气候变化的应对能力、指
导当地的农牧业生产具有重要的理论和实际价值。 |
| 关键词: 返青期 GIMMS NDVI 3g 累积NDVI 的Logistic 曲线 曲率极值法 内蒙古 |
| DOI：10.12105/j.issn.1672-0423.20180206 |
| 分类号: |
| 基金项目: |
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| Vegetation SOS dynamic monitoring in Inner Mongolia from 1982 to 2013 and Its responses to climatic changes |
|
Zhang Wen1, Bao Gang2, Bao Yuhai1,2
|
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1.Inner Mongolia Normal University，Inner Mongolia，hohhot，010022，China;2.Inner Mongolian Key Laboratory of Remote Sensing & Geography Information System，hohhot，010022
|
| Abstract: |
| ［Purpose］To study the SOS（ start of season）of Inner Mongolia to climate change.
［Method］This article is based on 1982-2013 GIMMS NDVI 3g data，using the cumulative
NDVI Logistic curve curvature extremum method，Linear trend analysis method，and SOS was
identified and extracted in Inner Mongolia during the 32 years（ except for the desert vegetation
scarce area），and the spatial and temporal variation of SOS was analyzed and the responses of
temperature changes and precipitation changes to SOS in different vegetation types［. Result］The
results show that ：（1）the average SOS in Inner Mongolia from 1982 to 2013 is between April 26
and May 23.（ 2）The SOS in Inner Mongolia showed a postponing trend from 1982 to 2013. With
2010 as a turning point，there was no obvious advance or postponement of SOS before the turning
point. After 2010，the SOS tended to be delayed year by year.（ 3）Relationship between SOS
and meteorological factors in Inner Mongolia：In April，the area with negative correlation with
temperature was 72.5%. The area of negative correlation between precipitation and precipitation
in April was 55.9%. So it can be concluded that the increase of temperature and increase of
precipitation in April will promote the advancement of SOS. Compared with precipitation，SOS
is more related to temperature.（ 4）Relationship between SOS，temperature and precipitation
in different vegetation types：The correlation between SOS and the temperature in April was the
most significant，and it passed the significance test of 0.01. The increase of precipitation in April
promoted the advance of SOS，and the correlation between the increase of precipitation in April
of grassland and SOS passed the significance test of 0.01.［ Conclusion］By studying the spatial
temporal changes of vegetation returning green period in Inner Mongolia，the relationship between
the vegetation returning green period and meteorological factors is explored，which has important
theoretical and practical values for enhancing the ability to cope with climate change and guiding
local agricultural and pastoral production. |
| Key words: start of season GIMMS NDVI 3g cumulative NDVI Logistic curve curvatureextremum method Inner Mongolia |
