A New Interpolation Algorithm in Fast Radiative Transfer Model
- DOI
- 10.2991/iccasm.2012.151How to use a DOI?
- Keywords
- Data Assimilation, NWP Model, RTTOV, Interpolation
- Abstract
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 TIROS Operation Vertical Sounders (RTTOV). Experimental results 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.
- Copyright
- © 2012, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Yi Yu AU - Weimin Zhang AU - Qunbo Huang AU - Lu Yao PY - 2012/08 DA - 2012/08 TI - A New Interpolation Algorithm in Fast Radiative Transfer Model BT - Proceedings of the 2012 International Conference on Computer Application and System Modeling (ICCASM 2012) PB - Atlantis Press SP - 595 EP - 598 SN - 1951-6851 UR - https://doi.org/10.2991/iccasm.2012.151 DO - 10.2991/iccasm.2012.151 ID - Yu2012/08 ER -