大孔径闪烁仪测量戈壁地区感热通量

Surface Sensible Heat Fluxes Monitored by Large Aperture Scintillometers at Gebi of Jinta

利用2008年6月11～30日在金塔开展的"绿洲系统非均匀下垫面能量水分交换和边界层过程观测与理论研究"期间第一阶段戈壁下垫面大孔径闪烁仪(LAS)的观测资料,用混合对流方法和自由对流方法分别计算了戈壁感热通量。结果表明,对于利用LAS资料计算地表感热通量的方法中,混合对流方法相对于自由对流方法更加适用,且混合对流方法中Andreas给出的参数相对于DeBruin的参数更加适用于戈壁下垫面。此外,LAS测得的感热通量相对涡动相关方法的值较大,提高了地表能量闭合度。

The surface sensible heat flux of Jinta desert was calculated by MIX methods and FRE method by using the Large Aperture Scinillometer （LAS） data derived from Jinta desert experiment, which was implemented from 11 to 30 June 2008. It was found that the MIX method is more suitable than FRE method as the sensible heat flux calculated by the MIX method can enhance the energy balance ration, and the Andreas parameter is better than De Bruin parameter in calculating sensible heat flux. All the results show a good consistence with the sensible heat flux derived from EC system in the same period.