| 松嫩平原不同气候区植被NDVI对气候变化的响应 |
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| 引用本文： | 侯光雷,刘德赢,张正祥,郭聃,张洪岩.松嫩平原不同气候区植被NDVI对气候变化的响应[J].中国农业气象,2012,33(2):271-277. |
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| 作者姓名： | 侯光雷 刘德赢 张正祥 郭聃 张洪岩 |
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| 作者单位： | 1. 东北师范大学城市与环境科学学院,长春,130024
2. 东北师范大学城市与环境科学学院,长春130024;吉林农业大学资源与环境学院,长春130118 |
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| 基金项目： | 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） |
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| 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。
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| 关 键 词： | 松嫩平原 NDVI 气象因子 气候区 滞后性 |
Response of NDVI in Different Climatic Zone to Climate Change in Songnen Plain |
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| HOU Guang-lei
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LIU De-ying
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ZHANG Zheng-xiang
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GUO Dan
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ZHANG Hong-yan.Response of NDVI in Different Climatic Zone to Climate Change in Songnen Plain[J].Chinese Journal of Agrometeorology,2012,33(2):271-277. |
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| Authors: | HOU Guang-lei LIU De-ying ZHANG Zheng-xiang GUO Dan ZHANG Hong-yan |
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| Institution: | 1. School of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024 China; 2. College of Resources and Environment, Jilin Agricultural University, Changchun 130118 ) |
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| 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 mini- mum temperature, mean maximum temperature 10-day （P 〈0. 01 ）, between NDVI and precipitation, relative humidi- ty 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. |
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| Keywords: | Songnen plain NDVI Meteorological factors Climatic zones Time lag |
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