An ocean coupling potential intensity index for tropical cyclones
Black, Peter G.
Price, James F.
Chen, Shuyi S.
D'Asaro, Eric A.
MetadataShow full item record
Timely and accurate forecasts of tropical cyclones (TCs, i.e., hurricanes and typhoons) are of great importance for risk mitigation. Although in the past two decades there has been steady improvement in track prediction, improvement on intensity prediction is still highly challenging. Cooling of the upper ocean by TC-induced mixing is an important process that impacts TC intensity. Based on detail in situ air-deployed ocean and atmospheric measurement pairs collected during the Impact of Typhoons on the Ocean in the Pacific (ITOP) field campaign, we modify the widely used Sea Surface Temperature Potential Intensity (SST_PI) index by including information from the subsurface ocean temperature profile to form a new Ocean coupling Potential Intensity (OC_PI) index. Using OC_PI as a TC maximum intensity predictor and applied to a 14 year (1998–2011) western North Pacific TC archive, OC_PI reduces SST_PI-based overestimation of archived maximum intensity by more than 50% and increases the correlation of maximum intensity estimation from r2 = 0.08 to 0.31. For slow-moving TCs that cause the greatest cooling, r2 increases to 0.56 and the root-mean square error in maximum intensity is 11 m s−1. As OC_PI can more realistically characterize the ocean contribution to TC intensity, it thus serves as an effective new index to improve estimation and prediction of TC maximum intensity.
© American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 40 (2013): 1878–1882, doi:10.1002/grl.50091.
Suggested CitationArticle: Lin, I.-I., Black, Peter G., Price, James F., Yang, C.-Y., Chen, Shuyi S., Lien, C.-C., Harr, Patrick, Chi, N.-H., Wu, C.-C., D'Asaro, Eric A., "An ocean coupling potential intensity index for tropical cyclones", Geophysical Research Letters 40 (2013): 1878–1882, DOI:10.1002/grl.50091, https://hdl.handle.net/1912/6120
Showing items related by title, author, creator and subject.
Chen, Sue; Cummings, James A.; Schmidt, Jerome M.; Sanabia, Elizabeth; Jayne, Steven R. (John Wiley & Sons, 2017-05-13)A 3-D variational ocean data assimilation adjoint approach is used to examine the impact of ocean observations on coupled tropical cyclone (TC) model forecast error for three recent hurricanes: Isaac (2012), Hilda (2015), ...
Liu, Ling Ling; Wang, Wei; Huang, Rui Xin (American Meteorological Society, 2008-06)Wind stress and tidal dissipation are the most important sources of mechanical energy for maintaining the oceanic general circulation. The contribution of mechanical energy due to tropical cyclones can be a vitally important ...
Miltenberger, Alexander R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)The purpose of this study is to understand the interactions of tropical cyclones with ocean eddies. In particular we examine the influence of a cold-core eddy on the cold wake formed during the passage of Typhoon Fanapi ...