Observations of the cold wake of Typhoon Fanapi (2010)

TitleObservations of the cold wake of Typhoon Fanapi (2010)
Publication TypeJournal Article
Year of Publication2013
AuthorsMrvaljevic RK, Black PG, Centurioni LR, Chang YT, D'Asaro EA, Jayne SR, Lee CM, Lien RC, Lin II, Morzel J, Niiler PP, Rainville L, Sanford TB
JournalGeophysical Research Letters
Date Published2013/01
Type of ArticleArticle
ISBN Number0094-8276
Accession NumberWOS:000317829300016
Keywordsboundary-layer; hurricane; intensity; ocean thermal structure; temperature response

Several tens of thousands of temperature profiles are used to investigate the thermal evolution of the cold wake of Typhoon Fanapi, 2010. Typhoon Fanapi formed a cold wake in the Western North Pacific Ocean on 18 September characterized by a mixed layer that was >2.5 degrees C cooler than the surrounding water, and extending to >80 m, twice as deep as the preexisting mixed layer. The initial cold wake became capped after 4 days as a warm, thin surface layer formed. The thickness of the capped wake, defined as the 26 degrees C-27 degrees C layer, decreased, approaching the background thickness of this layer with an e-folding time of 23 days, almost twice the e-folding lifetime of the Sea Surface Temperature (SST) cold wake (12 days). The wake was advected several hundreds of kilometers from the storm track by a preexisting mesoscale eddy. The observations reveal new intricacies of cold wake evolution and demonstrate the challenges of describing the thermal structure of the upper ocean using sea surface information alone. 

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