论文标题
使用热力学原理对空间分布的表面能通量的全局估计
Global Estimates of Spatially Distributed Surface Energy Fluxes using Thermodynamic Principles
论文作者
论文摘要
有限的表面观察结果导致有关驱动气候系统的表面能量平衡的不完整知识。在这里，我们开发了一种基于最大功率的热力学原理的新型，纯粹的基于物理的分析方法。该方法仅来自陆地表面的四个输入和辐射的四个输入。与现有的表面能量平衡模型不同，所提出的方法不使用任何参数化，因此由于相同而不会遭受不确定性。我们用全球各地的102个Eddy协方差观测站验证了我们的方法论，其土地使用土地覆盖率不同。使用从1度的空间分辨率的铜绿的卫星观测值，我们首次获得了对明智（H），潜热（LE）和地表热储存（DELQS）通量的空间分布的全局分析估计。对于卫星的全球观察到的陆净辐射为84 W/m2，我们发现H，LE和DELQ分别为42 W/M2、40 W/M2和2 W/M2。所有表面能量平衡成分的理论和精确估计将提高我们对全球不同土地使用土地覆盖的表面变暖的理解。
Limited surface observations of turbulent heat fluxes result in incomplete knowledge about the surface energy balance that drives the climate system. Here, we developed a novel, purely physics-based analytical method grounded on the thermodynamic principle of maximum power. The approach derives the turbulent heat flux only from the four inputs of incoming and outgoing radiations at the land surface. The proposed approach does not use any parameterization, unlike the existing surface energy balance models, and hence does not suffer from uncertainty due to the same. We validated our methodology with 102 eddy covariance observation stations around the globe with different land use land covers. Using the satellite observations from CERES at a spatial resolution of 1 degree, we have obtained spatially distributed global analytical estimates of Sensible (H), latent heat (LE), and land surface heat storage (delQs) fluxes for the first time. For a global observed land Net radiation of 84 W/m2 from the satellite, we found H, LE and delQs to be 42 W/m2, 40 W/m2 and 2 W/m2, respectively. The theoretical and precise estimates of all surface energy balance components will improve our understanding of surface warming for different land use land covers across the globe.
