THE EFFECT OF TROPICAL CYCLONE PASSAGE ON UNDERSEA ACOUSTIC PARAMETERS IN THE EAST CHINA SEA

This research examines the impact of tropical cyclone passage on undersea acoustic parameters in the East China Sea using 222 historical tropical cyclone tracks and seven acoustic parameters from 1979 to 2010 (i.e., the global warming period). Data from the Fleet Numerical Meteorology and Oceanography Center’s Climate Forecast System Reanalysis ocean dataset and Joint Typhoon Warning Center’s Western North Pacific Ocean Best Track Data were analyzed. The acoustic parameters include in-layer gradient, surface duct cutoff frequency, sonic layer depth, below layer gradient, deep sound channel axis, deep sound channel strength, and critical depth. Results show that all acoustic parameters, with the exception of below layer gradient, experience a response to tropical cyclone passage that is correlated with storm intensity. Furthermore, the most significant anomalous acoustic response occurs in the summer months, and is most drastic with super typhoon passage. Ultimately, recognition of the effect of tropical cyclone passage on the water column will allow for more accurate ocean predictions, to include underwater acoustics, in an operationally relevant region.

Department dc:contributor.department

Oceanography (OC)

Grantor dc:publisher

Monterey, CA; Naval Postgraduate School

Year dc:date.issued

2024

Author dc:creator

• Depompeo, Jasmine S.

Advisor dc:contributor.advisor

• Chu, Peter C.

Statement dc:rights

• This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.

Handle dc:identifier.uri

https://hdl.handle.net/10945/73101

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/73101