中国农业气象 ›› 2012, Vol. 33 ›› Issue (02): 271-277.doi: 10.3969/j.issn.1000-6362.2012.02.019

• 论文 • 上一篇    下一篇

松嫩平原不同气候区植被NDVI对气候变化的响应

侯光雷, 刘德赢, 张正祥, 郭聃, 张洪岩   

  1. 1东北师范大学城市与环境科学学院,长春130024;2吉林农业大学资源与环境学院,长春130118
  • 收稿日期:2011-09-07 出版日期:2012-05-20 发布日期:2012-08-30
  • 作者简介:侯光雷(1982-),河南鹤壁人,博士生,主要从事资源环境遥感研究。Email:hougl793@126.com侯光雷, 刘德赢, 张正祥, 郭聃, 张洪岩
  • 基金资助:

    东北师范大学“十一五”科技创新平台(106111065202);国家重点基础研究发展规划(973)项目(2009CB426305)

Response of NDVI in Different Climatic Zone to Climate Change in Songnen Plain

 HOU  Guang-Lei, LIU  De-Ying, ZHANG  Zheng-Xiang, GUO  Dan, ZHANG  Hong-Yan   

  1. 1School of Urban and Environmental Sciences, Northeast Normal University, Changchun130024 China;2College of Resources and Environment, Jilin Agricultural University, Changchun130118
  • Received:2011-09-07 Online:2012-05-20 Published:2012-08-30
  • About author:HOU Guang-Lei, LIU De-Ying, ZHANG Zheng-Xiang, GUO Dan, ZHANG Hong-Yan

摘要: 采用Thornthwaite湿润指数对松嫩平原进行气候分区,并利用2000-2009年SPOT/VGT逐旬最大合成值NDVI数据和研究区内17个气象站点数据,分析研究区不同气候区植被NDVI与气象因子的相关关系,以探讨NDVI对气候变化响应滞后性的时空特征。结果表明,(1)NDVI与同期旬平均气温、旬平均最高气温、旬平均最低气温呈极显著正相关(P<0.01),相关系数大小依次为湿润区>半湿润区>半干旱区;NDVI与同期旬降水量、旬平均相对湿度呈显著正相关(P<0.05),相关系数依次为半干旱区>半湿润区>湿润区。(2)NDVI与各气象因子逐步回归结果表明,最低气温是NDVI变化的限制性因子,且在3个气候区中,最低气温对NDVI的贡献最大;降水是湿润区和半湿润区影响植被生长的最重要因素,而在半干旱区,相对湿度对NDVI的贡献大于降水。(3)NDVI对温度响应的滞后期在湿润区为20d,半湿润区为20~30d,半干旱区为30d;对降水响应的滞后期在湿润区为30d,半湿润区为20d,半干旱区为10d,且NDVI对相对湿度响应的滞后期比降水短;空间上NDVI对温度响应的滞后期从东到西逐渐变长,而降水则相反。

关键词: 松嫩平原, NDVI, 气象因子, 气候区, 滞后性

Abstract: Songnen plain was divided into climatic zones with thornthwaite humid index. The time lag character of the NDVI to climate change was discussed by using correlation between the SPOT/VGT NDVI and meteorological data. The results showed that there were significant positive correlation between NDVI and mean temperature, mean minimum temperature, mean maximum temperature 10 day (P<0.01), between NDVI and precipitation, relative humidity 10 day (P<0.05). The minimum temperature 10 day was restrictive factor to NDVI. Precipitation was the most important contributor to NDVI in humid and semihumid area, but the relative humidity was more important to NDVI than precipitation in semi arid area. Time lag of NDVI to temperature was 20 days in humid region, 20~30 days in semihumid region and 30 days in semi arid days, and which to precipitation was 30 days in humid region, 20 days in semihumid region and 10 days in semi arid days. Time lag of NDVI to humidity was shorter than that to precipitation.

Key words: Songnen plain, NDVI, Meteorological factors, Climatic zones, Time lag

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