城市森林对小气候的调节及其功能价值评估  

Functional evaluation of adjusting microclimate of Guangzhou urban forests

作　　者：黄少卫 康文星[2] 吴耀兴[2,3] 何介南[2] 

机构地区：[1]阳江林场,广东阳江529934 [2]中南林业科技大学,湖南长沙410004 [3]湖南科技学院,湖南永州425100

出　　处：《中南林业科技大学学报》2010年第1期90-94,共5页Journal of Central South University of Forestry & Technology

基　　金：国家科技部科研专项项目(20021220);国家林业局重点项目(200107);广州市林业局科技攻关项目(200306)

摘　　要：分析了广州市城市森林调节小气候的功能及其价值。结果表明:城市森林降低城市热岛效能晴天2.37℃,雨天2.0℃,增加空气湿度11%,这些带网片点结构的城市森林使得广州市热岛效应分布呈小而窄的断续分布,而不是大而集中的连续分布;降低紫外线指数日平均为2.23,降低辐射量热值日平均为6.10 MJ.m-2;使舒适天数增加36.36%,较舒适天数增加28.57%,而稍不舒适天数减少8.38%,稍闷热天数减少21.42%,闷热天数减少67%;城市森林改善小气候的功能价值包括降低热岛效应价值1 254 125.52×104元.a-1,增加空气湿度价值932 479.20×104元.a-1,共计2 186 604.72×104元.a-1。The functions of adjusting small climate and optimizing environment of Guanzhou urban forests were analyzed.The findings show that urban forests decreased temperature of urban heat-island effects by 2.37 ℃ in fine days and 2.0 ℃ in rain days,and raised air humidity by 11%;the structure of urban forests showing belt shape,web shape,piece shape and point shape made the heat island effect to have the small and narrow spiccato distribution,but not the big,centralized continuous distribution;the mean ultraviolet radiation index decreased by 2.23,and the mean radiating heat value decreased by 6.10 MJ·m^-2;the comforable days increased by 36.36%,and the more comfortable increased by 28.57%,so making the more uncomfortable days and the frowziness days decreased by 8.38% and 67%;the urban forests could improve microclimate,the functinal values of the decreasing of heat island effects was 1 254 125.52×10^4 yuan·a^-1,that of the air humidity value increased by 932 479.2×10^4 yuan·a^-1,the total values was 2 186 604.72×10^4 yuan·a^-1.

关 键 词：城市森林 调节气候 功能价值 广州市 

分 类 号：S718.56[农业科学—林学]