几种下垫面对紫外辐射的反射率

利用ＥＰＰＬＥＹ紫外辐射仪测量了６种下垫面对紫外辐射的反射率。初步结果是：（１）裸地、水泥地、草地、砂子和黑土的紫外反射率分别为２．４％，６．７％，２．１％，４．２％和６．６％，而新雪的紫外反射率为８３．５％。（２）紫外反射率均小于太阳总辐射的反射率，尤其是前５种下垫面。（３）紫外反射率的日变化与太阳总辐射反率的日变化相似。

ALBEDO OF ULTRAVIOLET RADIATION ON SEVERAIL UNDERLYING SURFACE

This study makes use of EPPLEY's ultraviolet radiometer to measure the albedos of ultraviolet radiation(UV) on six kinds of underlying surface. The primary re-sults are presented as follows: (1) The albedo of UV-radiation is 2.4% for bare soil, 6.7% concrete, 2.1% grassland. 4.2% sands,6.6% black soil and 83.5% new snow surface , respectively. (2) The UV-albedos are smaller than those of total solar short-wave radiation, espccialy for previous five kinds of underlying surface , namely. except for snow. (3) The daily curve of UV-albedo is similar to albedo of total solar short-wave radiation.