Response of Upper Ocean during passage of MALA cyclone utilizing ARGO data

Vissa, Naresh Krishna; Satyanarayana, A. N. V.; Kumar, B. Prasad

doi:10.1016/j.jag.2011.08.015

Cited by 34 publications

(14 citation statements)

References 40 publications

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“…However, the mechanism of subsurface temperature change is more complicated than expected. The Argo program, which collects the in situ temperature and salinity profiles in the upper ocean, provides opportunities to better understand the subsurface response to typhoons [25][26][27][28]. It appears that some important physical processes under complicated ocean backgrounds, such as the pre-existing mesoscale eddies and initial mixed layer depth, which could influence the temperature change during the passages of typhoons, might be ignored [28,29].…”

Section: Introductionmentioning

confidence: 99%

Impact of Cyclonic Ocean Eddies on Upper Ocean Thermodynamic Response to Typhoon Soudelor

Ning

Zhang

et al. 2019

Remote Sensing

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By using multiplatform satellite datasets, Argo observations and numerical model data, the upper ocean thermodynamic responses to Super Typhoon Soudelor are investigated with a focus on the impact of an ocean cyclonic eddy (CE). In addition to the significant surface cooling inside the CE region, an abnormally large rising in subsurface temperature is observed. The maximum warming and heat content change (HCC) reach up to 4.37 °C and 1.73 GJ/m2, respectively. Moreover, the HCC is an order of magnitude larger than that calculated from statistical analysis of Argo profile data in the previous study which only considered the effects caused by typhoons. Meanwhile, the subsurface warming outside the CE is merely 1.74 °C with HCC of 0.39 GJ/m2. Previous studies suggested that typhoon-induced vertical mixing is the primary factor causing subsurface warming but these studies ignored an important mechanism related to the horizontal advection caused by the rotation and movement of mesoscale eddies. This study documents that the eddy-induced horizontal advection has a great impact on the upper ocean responses to typhoons. Therefore, the influence of eddies should be considered when studying the responses of upper ocean to typhoons with pre-existing mesoscale eddies.

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Section: Introductionmentioning

confidence: 99%

Impact of Cyclonic Ocean Eddies on Upper Ocean Thermodynamic Response to Typhoon Soudelor

Ning

Zhang

et al. 2019

Remote Sensing

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“…Argo program automatically collected nearly in situ temperature profiles in the upper 2000-m global ocean with an interval of a few days and provided a unique opportunity to study ocean subsurface responses to translating TCs (Park et al 2011;Sun et al 2012;Vissa et al 2012;Wu and Chen 2012). Unlike these studies which were all focused on the open ocean, the present study will be focused on understanding the subsurface temperature changes of the Kuroshio by means of 10-year satellite SST images and Argo data during the periods of TCs' passage.…”

Section: Introductionmentioning

confidence: 99%

Understanding surface and subsurface temperature changes induced by tropical cyclones in the Kuroshio

Liu

Wei

2015

Ocean Dynamics

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Surface and subsurface temperature changes in the Kuroshio induced by tropical cyclones (TCs) were investigated using both 10-year observational datasets (SST maps and Argo data) and temperature budget analysis of idealized numerical simulations. Although Argo data are very limited during a TC's passage, they provided unique in situ measurements at the subsurface of the Kuroshio. Compared to the surface water in the Kuroshio and in the general ocean, the subsurface water of the Kuroshio shows a rapid temperature warming (recovery) after a TC's passage. Budget analysis on the model simulations suggested that the temperature changes at surface Kuroshio are dominated by the wind-induced vertical mixing, while the subsurface temperature changes are primarily dominated by TC-induced Ekman pumping (downwelling-upwelling-downwelling pattern). The Kuroshio subsurface water is warmed up mainly by the downwelling process, and then transported downstream by strong Kuroshio currents. Sensitivity experiments suggested that the recovery time of the subsurface temperature cooling is more sensitive to TC translation speeds and less sensitive to the Kuroshio current velocities.

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“…The trajectory of NARGIS along with the locations of ARGO floats and RAMA buoy is shown in Figure . The ARGO floats are grouped as (a)–(j) based on float ID which have repetitive cycle of 4–10 days providing T / S profiles (Vissa et al, ). RV2 SST daily differences during 27 April to 2 May and a week difference (27 April to 3 May) for NARGIS are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Response of oceanic cyclogenesis metrics forNARGIScyclone: a case study

Vissa

Satyanarayana

Kumar

2013

Atmospheric Science Letters

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In this study, variability of two oceanic cyclogenesis metrics, tropical cyclone heat potential (TCHP) and effective oceanic layer for cyclogenesis (EOLC) in the Bay of Bengal (BoB) during NARGIS cyclone is investigated. EOLC represents the geopotential thickness of near surface stratified layer forms because of the spread of low salinity waters due to fresh water influx from rivers and precipitation. Climatological fields of TCHP and EOLC reveal that NARGIS translated towards the region of higher EOLC as seen in the observations. A maximum daily sea surface cooling of 2• C is observed along the right and rear side of NARGIS track.

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Response of Upper Ocean during passage of MALA cyclone utilizing ARGO data

Cited by 34 publications

References 40 publications

Impact of Cyclonic Ocean Eddies on Upper Ocean Thermodynamic Response to Typhoon Soudelor

Impact of Cyclonic Ocean Eddies on Upper Ocean Thermodynamic Response to Typhoon Soudelor

Understanding surface and subsurface temperature changes induced by tropical cyclones in the Kuroshio

Response of oceanic cyclogenesis metrics forNARGIScyclone: a case study

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