Radiative transfer in mountains: Application to the Tibetan Plateau
Radiative transfer in mountains: Application to the Tibetan Plateau
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DOI：
10.1029/2007gl031762
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发表时间：
2007-12
影响因子：
5.2
通讯作者：
Kuo-Nan Liou;Wei‐Liang Lee;A. Hall
中科院分区：
文献类型：
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作者：
Kuo-Nan Liou;Wei‐Liang Lee;A. Hall
我们开发了一个三维蒙特卡罗光子追踪程序，用于计算不均匀和不规则地形中的宽带太阳和热红外辐射通量。在青藏高原以拉萨市为中心选取100 × 100 km 2的区域，利用MODIS/Terra卫星遥感资料和地表温度资料进行研究。我们发现，相对于一个平坦的表面，表面太阳能通量的异常可以高达600 W/m2，这取决于一天中的时间，山的配置，和太阳能电池。表面温度是确定异常的表面红外通量分布相对于一个平坦的表面，高达70 W/m2的值在寒冷的山区表面的主导因素。在100 × 100 km 2和50 × 50 km 2的区域范围内，包括强烈的地形，平均表面太阳通量可以偏离气候模式和GCM中传统假设的平滑表面10-50 W/m2。
We developed a 3D Monte Carlo photon tracing program for the transfer of radiation in inhomogeneous and irregular terrain to calculate broadband solar and thermal infrared fluxes. We selected an area of 100 × 100 km2 in the Tibetan Plateau centered at Lhasa city and used the albedo and surface temperature from MODIS/Terra for this study. We showed that anomalies of surface solar fluxes with reference to a flat surface can be as large as 600 W/m2, depending on time of day, mountain configuration, and albedo. Surface temperature is the dominating factor in determining anomalies of the surface infrared flux distribution relative to a flat surface with values as high as 70 W/m2 at cold mountain surfaces. The average surface solar flux over regional domains of 100 × 100 km2 and 50 × 50 km2 comprising intense topography can deviate from the smoothed surface conventionally assumed in climate models and GCMs by 10–50 W/m2.