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DOI | 10.1029/2018JD029379 |
The Influences of Orography and Ocean on Track of Typhoon Megi (2016) Past Taiwan as Identified by HWRF | |
Li, Dian-Yi1; Huang, Ching-Yuang1,2 | |
2018-10-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:20页码:11492-11517 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan |
英文摘要 | Typhoon Megi (2016) headed northwestward toward Taiwan with southward deflection near landfall. In this study, Hurricane Weather Research and Forecast system (HWRF) was used to investigate the mechanism of the track changes over free ocean and track deflection near landfall. HWRF simulations using more realistic Hybrid Coordinate Ocean Model sea surface temperature (SST) analysis improve the northward biased track compared with that using Global Forecast System SST, due to the initial cooler SST below the storm path. The initial warmer Global Forecast System SST leads to a northward track shifting with an overintensified typhoon. As the Princeton Ocean Model is coupled, the SST over South China Sea becomes warmer leading to a northward track shifting compared to a southward shifting induced by the upper ocean cooling due to the typhoon-ocean interactions in the vicinity of the typhoon. Regardless of track shifting, southward deflection near landfall is mainly controlled by orographic effects of the Central Mountain Range (CMR). Cyclonic northerly is enhanced to the west of the typhoon center ahead and over the CMR that results in southward deflection. Diagnostics of potential vorticity (PV) tendency budget indicates that southward deflection can be explained by the southeastward tendency of latent heating effects near landfall. The combined effects of latent heating and cyclonic rotation of positive wave numer-1 (WN-1) potential vorticity vertical advection dominate the southward deflection when the typhoon is closer to Taiwan. Furthermore, the typhoon movement near landfall is slowed down mainly due to WN-1 negative vertical differential latent heating over the northern CMR. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452000300014 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; POTENTIAL VORTICITY TENDENCY ; TROPICAL CYCLONE ; IDEALIZED SIMULATIONS ; TRANSLATION SPEED ; MOUNTAIN-RANGE ; BOUNDARY-LAYER ; COUPLED MODEL ; MORAKOT 2009 ; IMPACT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33285 |
专题 | 气候变化 |
作者单位 | 1.Natl Cent Univ, Dept Atmospher Sci, Jhongli, Taiwan; 2.Taiwan Typhoon & Flood Res Inst, Natl Appl Res Labs, Taipei, Taiwan |
推荐引用方式 GB/T 7714 | Li, Dian-Yi,Huang, Ching-Yuang. The Influences of Orography and Ocean on Track of Typhoon Megi (2016) Past Taiwan as Identified by HWRF[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(20):11492-11517. |
APA | Li, Dian-Yi,&Huang, Ching-Yuang.(2018).The Influences of Orography and Ocean on Track of Typhoon Megi (2016) Past Taiwan as Identified by HWRF.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(20),11492-11517. |
MLA | Li, Dian-Yi,et al."The Influences of Orography and Ocean on Track of Typhoon Megi (2016) Past Taiwan as Identified by HWRF".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.20(2018):11492-11517. |
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