CAJ | 학술논문

为了定量评估北京绿色奥运城市绿地建设对生态环境的改善作用,根据北京城市下垫面状况改进了SEBAL模型地表比辐射率、地表温度参数,应用模型对北京TM遥感图像反演了城市绿地水热通量,并用涡度相关系统地面同步观测数据进行验证,模型反演值与地面观测值基本相符.秋季植被覆盖下垫面显热约为建筑区的78%,为裸土的60%;而潜热约为建筑区的1.24倍,为裸土的1.55倍;林地显热约为草地的97%,潜热为草地的1.12倍.显热随植被覆盖度Pv的增加而降低,而潜热随Pv的增加而增加;在低植被覆盖度（Pv〈0.6）区域,提高Pv对降低显热、增加潜热的效果比高植被覆盖度（Pv〉0.6）区域要显著.
위료정량평고북경록색오운성시록지건설대생태배경적개선작용,근거북경성시하점면상황개진료SEBAL모형지표비복사솔、지표온도삼수,응용모형대북경TM요감도상반연료성시록지수열통량,병용와도상관계통지면동보관측수거진행험증,모형반연치여지면관측치기본상부.추계식피복개하점면현열약위건축구적78%,위라토적60%;이잠열약위건축구적1.24배,위라토적1.55배;임지현열약위초지적97%,잠열위초지적1.12배.현열수식피복개도Pv적증가이강저,이잠열수Pv적증가이증가;재저식피복개도（Pv〈0.6）구역,제고Pv대강저현열、증가잠열적효과비고식피복개도（Pv〉0.6）구역요현저.
To evaluate how the green space project ronment, SEBAL inputs, such as land surface emissivity of Beijing Green Olympics improve urban ecological enviand surface temperature, were modified regarding Beijing urban land surface. Water and heat fluxes over Beijing urban green space were retrieved from Landsat TM image based on SEBAL. As the flux output from SEBAL was validated with that measured by eddy covariance, there was reasonable agreement between them： Sensible heat flux（ Qh ） over vegetation is estimated to be 78% of that over building area, 60% of that over bare soil in autumn. Meanwhile, latent heat flux （ Qe ） over vegetation exceeds that over building area 1.24 times, that over bare soil 1.55 times. Qh over forest is estimated to be 97% of that o- ver lawn, and Qe exceeds that over lawn I. 12 times. Qh decreases while vegetation fraction（ Pv ） increases. How- ever, Qe increases with Pv increase. The flux increasing or decreasing effect against Pv is much more significant o- ver sparse plant cover area （ Pv 〈 0.6） than over dense plant cover area （ Pv 〉 0. 6）.