CAJ | 학술논문

利用三维变分同化技术，通过将 ATOVS(Advanced TIROS-N Operational Vertical Sounder)(包括 AMSUA 和AMSUB微波辐射探测器及高分辨率红外辐射探测器HIRS)亮度温度资料直接同化进中尺度数值预报模式WRF中，以提高模式对台风路径的模拟精度。针对两个台风个例鲇鱼(2010)和纳沙(2011)进行了同化试验，结果表明：1)同化卫星亮温资料能够改善台风初始场结构(大气流场、温度场和水汽场)，进而提高对台风路径的模拟精度；2)不同资料的同化效果不一样，同化AMSUA资料对台风的路径模拟有较明显的改善效果，而同化HIRS3资料和AMSUB资料则无明显改善效果；3)卫星资料同化对于改变环境引导气流有较大作用，可以通过影响副高的强弱和位置改变环境气流场，从而影响台风的路径。
이용삼유변분동화기술，통과장 ATOVS(Advanced TIROS-N Operational Vertical Sounder)(포괄 AMSUA 화AMSUB미파복사탐측기급고분변솔홍외복사탐측기HIRS)량도온도자료직접동화진중척도수치예보모식WRF중，이제고모식대태풍로경적모의정도。침대량개태풍개례점어(2010)화납사(2011)진행료동화시험，결과표명：1)동화위성량온자료능구개선태풍초시장결구(대기류장、온도장화수기장)，진이제고대태풍로경적모의정도；2)불동자료적동화효과불일양，동화AMSUA자료대태풍적로경모의유교명현적개선효과，이동화HIRS3자료화AMSUB자료칙무명현개선효과；3)위성자료동화대우개변배경인도기류유교대작용，가이통과영향부고적강약화위치개변배경기류장，종이영향태풍적로경。
In this study, the Advanced Television and Infrared Observation Satellite Operational Vertical Sounder (ATOVS) radiance (including AMSUA, AMSUB and HIRS) was assimilated into the Weather Research and Forecasting (WRF) model to improve track simulation of Typhoon Megi (2010) and Typhoon Nesat (2011) using the three-dimensional variational (3DVAR) approach. The results from a series of assimilation experiments are as follows. 1) The assimilation of the radiance data can improve the accuracy of typhoon track simulation through adjusting the initial fields of typhoon structure including the atmospheric circulation, temperature and moisture. 2) Different satellite radiance data have different effects on improving typhoon track simulation. The improvement by AMSUA data is obviously greater than that by AMSUB data or HIRS3 data. 3) The assimilation of satellite radiance data can significantly influence the environmental steering flow through changing the strength and location of the subtropical high, leading to the improvement of typhoon track simulation.