|Title||Observations of the cold wake of Typhoon Fanapi (2010)|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Mrvaljevic 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|
|Journal||Geophysical Research Letters|
|Type of Article||Article|
|Keywords||boundary-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.