山东省森林调节温度的生态服务功能

Quantitative Research of Forest Ecological Service of Modulating Temperature in Shandong Province

以山东省森林资源为研究对象,利用MODIS温度产品、植被指数产品、实际采集的外业数据、山东省第7次二类调查数据、山东气象数据等,结合GIS技术,对2000—2006年山东省森林不同时间的温度数据进行量化分析。结果表明:1)森林夏季具有降温作用,冬季具有保温作用;2)夜间森林对温度的调节作用不明显;3)森林温度变化的振幅比农田、城镇都小;4)农田降温和保温的效果都不如森林显著;5)白天,在夏季,森林地表温度(LST)和归一化植被指数(NDVI)是负相关的关系,冬季是正相关的关系;夜间,无论冬夏,森林的LST与NDVI几乎不存在相关性;6)LST的变化与NDVI的变化是负相关的关系。

Data of the Shandong Provinces forest resources,including MODIS temperature,vegetation index,the field surveying data and the meteorological data in Shandong, combining with GIS, were used to study the ecological temperature regulation of forests with different tree species and in different seasons during 2000—2006 by using. The results were as the following： 1） In summer forests had a function to decrease temperature,while in winter they preserved heat; 2） The forests did not modulate temperature overnight; 3） The temperature change in forests was less than that in farmlands and cities; 4） The forests had greater capacity to modulate temperature variation over seasons than farmland did; 5） In Summer,land surface temperature,（LST） and normalized difference vegetation index （NDVI） of the daytime had a negative correlation with each other,however in winter they had a positive correlation. In evening,LST was not correlated with NDVI; 6） the change of LST was negatively correlated with the change of NDVI.