Validation and application of altimetry-derived upper ocean thermal structure in the western North Pacific ocean for typhoon-intensity forecast

Iam Fei Pun, I. I. Lin*, Chau-Ron Wu, Dong Shan Ko, W. Timothy Liu

*此作品的通信作者

    研究成果: 雜誌貢獻期刊論文同行評審

    57 引文 斯高帕斯(Scopus)

    摘要

    This paper uses more than 5000 colocated and near-coincident in-situ profiles from the National Oceanic and Atmospheric Administration/Global Temperature and Salinity Profile Program database spanning over the period from 2002 to 2005 to systematically validate the satellite-altimetry-derived upper ocean thermal structure in the western North Pacific ocean as such ocean thermal structure information is critical in typhoon-intensity change. It is found that this satellite-derived information is applicable in the central and the southwestern North Pacific (covering 122-170° E, 9-25°N) but not in the northern part (130-170°E, 25-40°N). However, since > 80% of the typhoons are found to intensify in the central and southern part, this regional dependence should not pose a serious constraint in studying typhoon intensification. Further comparison with the U.S. Naval Research Laboratory's North Pacific Ocean Nowcast/Forecast System (NPACNFS) hydrodynamic ocean model shows similar regional applicability, but NPACNFS is found to have a general underestimation in the upper ocean thermal structure and causes a large underestimation of the tropical cyclone heat potential (TCHP) by up to 60 kJ/cm2. After validation, the derived upper ocean thermal profiles are used to study the intensity change of supertyphoon Dianmu (2004). It is found that two upper ocean parameters, i.e., a typhoon's self-induced cooling and the during-typhoon TCHP, are the most sensitive parameters (with R2 ∼ 0.7) to the 6-h intensity change of Dianmu during the study period covering Dianmu's rapid intensification to category 5 and its subsequent decay to category 4. This paper suggests the usefulness of satellite-based upper ocean thermal information in future research and operation that is related to typhoon-intensity change in the western North Pacific.

    原文英語
    頁(從 - 到)1616-1630
    頁數15
    期刊IEEE Transactions on Geoscience and Remote Sensing
    45
    發行號6
    DOIs
    出版狀態已發佈 - 2007 六月 1

    ASJC Scopus subject areas

    • 電氣與電子工程
    • 地球與行星科學(全部)

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