地理科学 ›› 2015, Vol. 35 ›› Issue (12): 1616-1621.doi: 10.13249/j.cnki.sgs.2015.012.1616

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基于NDVI的秦岭山地植被遥感物候及其与气温的响应关系——以陕西境内为例

马新萍(), 白红英(), 贺映娜, 秦进   

  1. 西北大学城市与环境学院, 陕西 西安 710127
  • 收稿日期:2014-11-10 修回日期:2015-03-02 出版日期:2015-01-20 发布日期:2015-01-20
  • 作者简介:

    作者简介:马新萍(1988-),女,陕西咸阳人,博士研究生,研究方向为自然地理及全球变化等方面的研究。 E-mail:maxinping_2007@126.com

  • 基金资助:
    国家林业公益性行业科研专项(201304309)资助

The Vegetation Remote Sensing Phenology of Qinling Mountains Based on NDVI and It‘s Response to Temperature: Taking Within the Territory of Shaanxi as An Example

Xin-ping MA(), Hong-ying BAI(), Ying-na HE, Jin QIN   

  1. The Department of City and Environment in Northwestern University Xi'an, Shaanxi 710127, China
  • Received:2014-11-10 Revised:2015-03-02 Online:2015-01-20 Published:2015-01-20

摘要:

基于MODIS NDVI时间序列数据,利用动态阈值法提取秦岭山地2000~2010年的物候参数,并结合实测物候资料进行验证,在宏观尺度上量化了气温升高对植物物候的影响程度。研究得出:基于NDVI的物候变化趋势与实测物候资料结果一致;2000~2010年间物候始期提前的速率为0.165 6 d/a,末期推后速率为0.109 1 d/a;空间上,秦岭山地北部区域的植被物候始期主要发生在第120~130 d,相对于南坡较晚,物候末期主要发生在第300~325 d,北部区域物候末期的到来较迟,南部区域相对较早;物候始期NDVI与有效气温、春季、生长期气温相关性较好,末期NDVI与夏、秋季节气温相关性较好;气温对生长季开始阶段的NDVI在时间上存在2~3旬的滞后效应。

关键词: 遥感物候, 秦岭山地, 动态阈值法, GIS, MODIS-NDVI

Abstract:

The vegetation phenology change was effected evidently by global temperature rising. The phenological parameters extracted from NDVI data can accurately showed a continuous phenology changes in macro scope. The vegetation phenology parameters was extracted by the method of dynamic threshold based on the MODIS NDVI time series of images data in 2000-2010 at the Qinling Mountains. The measured phenological data was used to verified the accuracy of remote sensing phenology results. The relationship between temperature changes and the phenology of Qinling region was quantitied at the macro scale. The resulte showed that the trend of vegetation phenology variation based on the NDVI are consistent with the results of measured phenological data. In 2000-2010, the advanced rate of phenology beginning period was 0.165 6 d/a, the delayed rate of phenology finaling period was 0.109 1 d/a. On space, the vegetation phenology beginning period in the northern region of the Qinling Mountains mainly occurred in the first 120 days to 130 days, it was later than the period of southern slope. The phenological ending period mainly occurred in 300-325 days , the arrival of phenology finaling period in the northern region was later than the southern region. The correlation of NDVI in phenological beginning period and the effective temperature, the spring and growing season temperature is significantly positive, NDVI in phenological ending period has a significantly positive correlation with the temperature in summer and autumn. The temperature lag 2-3 phase behind NDVI at the phenology beginning period.

Key words: remote sense phenology, the Qinling Mountains, dynamic threshold method, GIS, MODIS NDVI

中图分类号: 

  • K903