A survival analysis of the gulf stream warm core rings
A survival analysis of the gulf stream warm core rings
Date
2020-10-14
Authors
Silva, E. Nishchitha S.
Gangopadhyay, Avijit
Fay, Gavin
Welandawe, Manushi K. V.
Gawarkiewicz, Glen G.
Silver, Adrienne M.
Monim, Mahmud-Ul-Hasan
Clark, Jenifer
Gangopadhyay, Avijit
Fay, Gavin
Welandawe, Manushi K. V.
Gawarkiewicz, Glen G.
Silver, Adrienne M.
Monim, Mahmud-Ul-Hasan
Clark, Jenifer
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DOI
10.1029/2020JC016507
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Keywords
Gulf Stream
Warm core rings
Survival analysis
Warm core rings
Survival analysis
Abstract
Survival of Gulf Stream (GS) warm core rings (WCRs) was investigated using a census consisting of a total of 961 rings formed during the period 1980–2017. Kaplan‐Meier survival probability and Cox hazard proportional models were used for the analysis. The survival analysis was performed for rings formed in four 5° zones between 75° W and 55° W. The radius, latitude, and distance from the shelf‐break of a WCR at formation all had a significant effect on the survival of WCRs. A pattern of higher survival was observed in WCRs formed in Zone 2 (70°–65° W) or Zone 3 (65°–60° W) and then demised in Zone 1 (75°–70° W). Survival probability of the WCRs increased to more than 70% for those formed within a latitude band from 39.5° to 41.5° N. Survival probability is reduced when the WCRs are formed near the New England Seamounts.
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Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 125(10),(2020): e2020JC016507, https://doi.org/10.1029/2020JC016507.
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Silva, E. N. S., Gangopadhyay, A., Fay, G., Welandawe, M. K. V., Gawarkiewicz, G., Silver, A. M., Monim, M., & Clark, J. (2020). A survival analysis of the gulf stream warm core rings. Journal of Geophysical Research: Oceans, 125(10), e2020JC016507.