Biological and Environmental Research - Earth and Environmental System Sciences
Earth and Environmental System Modeling

Cyclone-Cyclone Interactions through the Ocean Pathway

TitleCyclone-Cyclone Interactions through the Ocean Pathway
Publication TypeJournal Article
Year of Publication2014
AuthorsBalguru, Karthik, Taraphdar Sourav, L. Leung Ruby, Foltz Gregory R., and Knaff John A.
JournalGeophysical Research Letters
Abstract / Summary

The intense sea surface temperature cooling caused by tropical cyclone-induced mixing lasts several weeks and may thus influence a later cyclone passing over it. Using a 28 year analysis spanning the North Atlantic, eastern Pacific, and Northwest Pacific, we systematically demonstrate that, on average, when tropical cyclones encounter lingering wakes, they experience sea surface temperatures that are ∼0.25–0.5°C colder. Consequently, the intensification rates are ~0.4 - 0.7 ms -1/36h lower for cyclones when they interact with wakes, consistent with the maximum potential intensity theory. The probability for cyclones to encounter lingering wakes varies positively with cyclone frequency, is ∼10% on average, and has been as high as 27%–37% in the past. These large interaction probabilities reduce the mean intensification rates for cyclones by 3%–6% on average and by ∼12%–15% during the most active years. “Cyclone-cyclone interactions” may therefore represent a mechanism through which tropical cyclones self-regulate their activity to an extent on intraseasonal time scales.

DOI10.1002/2014GL061489
Journal: Geophysical Research Letters
Year of Publication: 2014
Publication Date: 10/2014

The intense sea surface temperature cooling caused by tropical cyclone-induced mixing lasts several weeks and may thus influence a later cyclone passing over it. Using a 28 year analysis spanning the North Atlantic, eastern Pacific, and Northwest Pacific, we systematically demonstrate that, on average, when tropical cyclones encounter lingering wakes, they experience sea surface temperatures that are ∼0.25–0.5°C colder. Consequently, the intensification rates are ~0.4 - 0.7 ms -1/36h lower for cyclones when they interact with wakes, consistent with the maximum potential intensity theory. The probability for cyclones to encounter lingering wakes varies positively with cyclone frequency, is ∼10% on average, and has been as high as 27%–37% in the past. These large interaction probabilities reduce the mean intensification rates for cyclones by 3%–6% on average and by ∼12%–15% during the most active years. “Cyclone-cyclone interactions” may therefore represent a mechanism through which tropical cyclones self-regulate their activity to an extent on intraseasonal time scales.

DOI: 10.1002/2014GL061489
Citation:
Balguru, K, S Taraphdar, LR Leung, GR Foltz, and JA Knaff.  2014.  "Cyclone-Cyclone Interactions through the Ocean Pathway."  Geophysical Research Letters.  https://doi.org/10.1002/2014GL061489.