天津地区归一化植被指数时间动态及其与气候因子的关系

生态学杂志

天津地区归一化植被指数时间动态及其与气候因子的关系

郭军;李明财;刘德义

天津市气候中心，天津 300074

收稿日期:2008-10-10 修回日期:1900-01-01 出版日期:2009-06-10 发布日期:2009-06-10

Temporal variation of vegetation NDVI and its relations to climate factors in Tianjin area.

GUO Jun;LI Ming-cai;LIU De-yi

Tianjin Climate Center, Tianjin 300074, China

Received:2008-10-10 Revised:1900-01-01 Online:2009-06-10 Published:2009-06-10

摘要/Abstract

摘要： 利用1982—2003年8 km×8 km的NASA/GIMMS半月合成的归一化植被指数(NDVI)和气候数据，研究了天津年平均及逐月NDVI变化趋势以及降水和气温对其影响。结果表明：1982—2003年，年平均NDVI呈现波动性的微弱降低趋势;生长季中，不同月份的年际变化存在明显差异;春季和秋季NDVI呈增加趋势，其中10月达到显著性水平（P<0.05），而夏季NDVI是降低的，6月下降达到极显著水平（P<0.01）;逐月NDVI与同期月平均气温及月降水量的回归分析表明，NDVI与温度和降水均有很好的非线性正相关关系（P<0.001），证实温度和降水对NDVI的影响有很强的季节性;降水和气温对生长季不同月份的植被NDVI影响明显不同，同时呈现一定的滞后性。

关键词: 生殖构件, 开花物候, 败育, 长柄双花木

Abstract: By using the half-month averaged NDVI data of NASA/GIMMS with 8 km×8 km spatial resolution and the climatic data from 1982 to 2003, the temporal variation of mean annual and monthly NDVI in Tianjin area was studied, with its relations to precipitation and temperature analyzed. In 1982〖KG-*2〗-〖KG-*7〗2003, the mean annual NDVI in study area had a slight decreasing trend. A month-dependent inter-annual variation of NDVI was observed during growth season. The NDVI had an increasing trend in spring and autumn, being significant in October (P<005), whereas a decrease in summer, being significant in June (P<001). The mean monthly NDVI was non-linearly and positively correlated with mean monthly temperature and monthly precipitation (P<0001), indicating that the effects of temperature and precipitation on NDVI were season-dependent. There was an obvious difference in the effects of temperature and precipitation on NDVI among different months in growth season, and a lagged response of NDVI to the climate factors was observed.

Key words: Reproductive module, Flowering phenology, Abortion, Disanthus cercidifolius var.longipes

郭军;李明财;刘德义. 天津地区归一化植被指数时间动态及其与气候因子的关系[J]. 生态学杂志.

GUO Jun;LI Ming-cai;LIU De-yi. Temporal variation of vegetation NDVI and its relations to climate factors in Tianjin area.[J]. cje.

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