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dc.contributor.authorThakur, Ritabrata  Concept link
dc.contributor.authorShroyer, Emily L.  Concept link
dc.contributor.authorGovindarajan, Rama  Concept link
dc.contributor.authorFarrar, J. Thomas  Concept link
dc.contributor.authorWeller, Robert A.  Concept link
dc.contributor.authorMoum, James N.  Concept link
dc.date.accessioned2019-07-03T20:47:16Z
dc.date.available2019-10-08T08:04:52Z
dc.date.issued2019-04-08
dc.identifier.citationThakur, R., Shroyer, E. L., Govindarajan, R., Farrar, J. T., Weller, R. A., & Moum, J. N. (2019). Seasonality and buoyancy suppression of turbulence in the Bay of Bengal. Geophysical Research Letters, 46(8), 4346-4355.en_US
dc.identifier.urihttps://hdl.handle.net/1912/24314
dc.descriptionAuthor Posting. © American Geophysical Union, 2019. 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, 46(8), (2019):4346-4355, doi:10.1029/2018GL081577.en_US
dc.description.abstractA yearlong record from moored current, temperature, conductivity, and four mixing meters (χpods) in the northernmost international waters of the Bay of Bengal quantifies upper‐ocean turbulent diffusivity of heat (Kt) and its response to the Indian monsoon. Data indicate (1) pronounced intermittency in turbulence at semidiurnal, diurnal, and near‐inertial timescales, (2) strong turbulence above 25‐m depth during the SW (summer) and NE (winter) monsoon relative to the transition periods (compare Kt > 10−4 m2/s to Kt  ∼ 10−5 m2/s, and (3) persistent suppression of turbulence (Kt < 10−5 m2/s) for 3 to 5 months in the latter half of the SW monsoon coincident with enhanced near‐surface stratification postarrival of low‐salinity water from the Brahmaputra‐Ganga‐Meghna delta and monsoonal precipitation. This suppression promotes maintenance of the low‐salinity surface waters within the interior of the bay preconditioning the upper northern Indian Ocean for the next year's monsoon.en_US
dc.description.sponsorshipThis work was supported by the U.S. Office of Naval Research (ONR) Grants N00014‐14‐1‐0236 and N00014‐17‐1‐2472, and the Ocean Mixing and Monsoon program of the Indian Ministry of Earth Sciences. The deployment of the Woods Hole Oceanographic Institution mooring and RW and JTF were supported by ONR Grant N00014‐13‐1‐0453. The deployment and recovery of the mooring were carried out by RV Sagar Nidhi and RV Sagar Kanya, respectively, with the help of the crew and science parties. Thanks to National Institute of Ocean Technology (India) for buoy support. The authors acknowledge invaluable discussions with Johannes Becherer, Deepak Cherian, and Sally Warner at CEOAS, OSU, and Dipanjan Chaudhuri, J Sree Lekha, and Debasis Sengupta at CAOS, IISc. The authors thank two anonymous reviewers for their detailed reviews, which have helped sharpen many aspects of this paper. Data can be accessed as described in section S2.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2018GL081577
dc.subjectocean turbulenceen_US
dc.subjectturbulence suppressionen_US
dc.subjectIndian Monsoonen_US
dc.subjectBay of Bengalen_US
dc.subjectTurbulent Mixingen_US
dc.subjectChipoden_US
dc.titleSeasonality and buoyancy suppression of turbulence in the Bay of Bengalen_US
dc.typeArticleen_US
dc.description.embargo2019-10-08en_US
dc.identifier.doi10.1029/2018GL081577


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