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자료유형
학술저널
저자정보
이정은 (기상청) 정성화 (기상청) 김해림 (기상청) 이선기 (기상청)
저널정보
한국기상학회 대기 대기 Vol.27 No.4
발행연도
2017.12
수록면
467 - 481 (15page)

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A correction method of reflectivity in partial beam blockage (PBB) area is suggested, which is based on the combination of digital terrain information and self-consistency principle between polarimetric observation. First, the reflectivity was corrected by adding the radar energy loss estimated from beam blockage simulation using digital elevation model (DEM) and beam propagation geometry in standard atmosphere. The additional energy loss by unexpected obstacles and non-standard beam propagation was estimated by using the coefficient between accumulated reflectivity (Z<SUB>H</SUB>) and differences of differential phase shift (Φ<SUB>DP</SUB>) along radial direction. The proposed method was applied to operational S-band dual-polarization radar at Jindo and its performance was compared with those of simulation method and selfconsistency method for six rainfall cases. When the accumulated reflectivity and increment of ΦDP along radial direction are too small, the self-consistency method has failed to correct the reflectivity while the combined method has corrected the reflectivity bias reasonably. The correction based on beam simulation showed the underestimation. For evaluation of rainfall estimation, the FBs (FRMSEs) of simulation method and self-consistency principle were −0.32 (0.59) and −0.30 (0.57), respectively. The proposed method showed the lowest FB (−0.24) and FRMSE (0.50). The FB and FMSE were improved by about 18% and by 19% in comparison to those before correction (−0.42 and 0.70). We can conclude that the proposed method can improve the accuracy of rainfall estimation in PBB area.

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Abstract
1. 서론
2. 자료
3. 방법론
4. 결과
5. 요약 및 결론
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