A New Interpolation Algorithm in Fast Radiative Transfer Model

摘要：

　　Many schemes of interpolation can be used for mapping from various coordinates of the numerical weather predictions (NWP) to the vertical coordinates of data assimilation systems.While most of the schemes do not imply the availability of a corresponding vertical mapping between the coordinates,even they are not implemented expediently.This leads to very noisy gradient with large unrealistic spikes which are simulated by the fast radiance transfer(RT) model for the first guest values from the numerical weather system and,consequently to incorrect data assimilation.The memorandum analyses a new algorithm of piecewise weighted integral interpolation applied in the Radiative Transfer for (OS) Operation Vertical Sounders (RTTOV).Experimental(S) show that the internal interpolation incorporated into RTTOV can map the coordinate of NWP model to the coordinate of data assimilation system flexibility,and can use the atmospheric information of the profiles on coordinate of NWP model sufficiently.Also the internal RTTOV interpolation can avoid blind levels derived from the nearest-neighbor log-linear interpolator and successfully retain the smooth structure of the radiance gradients.

关键词： Data Assimilation NWP Model RTTOV Interpolation

作者: Yu Yi Zhang Weimin Huang Qunbo Yao Lu

作者单位: Computer Science, University of National Defense Technology, Changsha, China;NO.94865 Troops of Chin Computer Science, University of National Defense Technology, Changsha, China

会议类型: 国际会议

会议名称: 2012 2nd International Conference on Computer Application and System Modeling(2012第二届计算机应用与系统建模国际会议)(ICCASM-2012)

会议地点: 沈阳

会议语种:英文

页码: 595-598

在线出版日期: 2012-07-27（万方平台首次上网日期，不代表论文的发表时间）