黄淮海地区植被活动对气候变化的响应特征  

Vegetation Activity Responses to Climate Change in the Huang-Huai-Hai Area Based on GIMMS NDVI Dataset

作　　者：陈怀亮[1,2] 徐祥德[3] 杜子璇[1,2] 邹春辉[1,2] 

机构地区：[1]河南省气象科学研究所,郑州450003 [2]中国气象局农业气象保障与应用技术重点开放实验室,郑州450003 [3]中国气象科学研究院,北京100081

出　　处：《应用气象学报》2009年第5期513-520,共8页Journal of Applied Meteorological Science

基　　金："十一五"国家科技支撑计划重点项目(2006BAD04B01);中国气象局气候变化专项(CCSF2006-15)共同资助

摘　　要：基于1982—2003年GIMMS NDVI遥感数据和气象资料,综合运用趋势分析、相关分析、奇异值分解等方法,分析我国黄淮海地区植被活动对气候变化响应的时空特征。结果表明:黄淮海地区整体气候变暖趋势比较明显,干旱化尚不显著,年平均植被NDVI表现为略微增加的趋势。在年尺度上,温度是敏感性最强的气候因子,全年温度、降水、相对湿度对植被NDVI动态变化具有正效应,而蒸发量具有负效应;在季尺度上,温度、降水的敏感性最强。自然植被对降水的敏感性最强,其次是温度;农业植被对温度的敏感性最强,其次是降水。植被对气候变化响应的空间特征表现为,植被主要生长季平均NDVI与温度距平场空间结构一致,与蒸发量距平场反位相对应,与降水量距平场呈北、南部正负相反分布,与相对湿度距平场呈南、北向正负相反的空间分布。Based on 1982—2003 GIMMS NDVI sounding and climate data by use of techniques for the trend,correlation and singular value decomposition（SVD） analysis,the space and time patterns of vegetation activity response to climate change in the Huan-Huai-Hai Area（HHHA） is investigated.Results suggest that this area shows a more significant warming trend and less distinct aridization,on the whole,with annual mean NDVI displaying a marginally increasing trend.In the spatial distribution figure of the correlation coefficient between annual average and climate factors,the annual average temperature is positive correlated to the annual NDVI in most area,which indicates that the increasing temperature is beneficial to the vegetation growing in most region of the study area.On the other hand,the annual precipitation is negatively correlated to the annual NDVI in south region but positively correlated to the annual NDVI in north region of the study area.On the yearly basis,temperature is the most sensitive climate factor.Annual temperature,rainfall and relative humidity exert positive effect on the dynamic variation in vegetation NDVI while evaporation exerts negative effect.On the seasonal scale,temperature and rainfall are the most strongly influencing factors,with autumn climate having heavier impact on yearly mean NDVI.Natural vegetation is predominantly sensitive to rainfall and,to a less degree,to temperature;agricultural vegetation is sensitive dominantly to temperature and,to less extent,to rainfall.The grassland vegetation is more sensitive to the precipitation and other climate factors than other kinds of natural vegetation.Among the agricultural vegetation,the rain-fed vegetation of one crop per annual and paddy-upland rotation agricultural vegetation of two crops per annual are more sensitive to the temperature and precipitation,but the vegetation of two crops per annual in irrigated farmland is less sensitive to the climate factors.The precipitation of autumn,spring and winter and the temperature of spring a

关 键 词：植被覆盖变化 气候变化 时空变化 响应特征 奇异值分解 

分 类 号：P461.7[天文地球—大气科学及气象学] P467