Heat, salt and volume transports by eddies in the vicinity of the Luzon Strait

Wang, Xidong; Li, Wei; Qi, Yiquan; Han, Guijun

doi:10.1016/j.dsr.2011.11.006

Cited by 39 publications

(40 citation statements)

References 46 publications

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“…Mesoscale eddies are ubiquitous in oceans globally [1][2][3][4][5][6] and play integral roles in redistributing ocean heat, salt, momentum and nutrients [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These structures span tens to hundreds of kilometers and can occur from tens to hundreds of days.…”

Section: Introductionmentioning

confidence: 99%

Regional Dependence of Atmospheric Responses to Oceanic Eddies in the North Pacific Ocean

Chiang

et al. 2020

Remote Sensing

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Based on sea surface height anomaly (SSHA) from satellite altimeter and microwave radiometer datasets, this study investigates atmospheric responses to oceanic eddies in four subdomains of the North Pacific Ocean with strongest eddy activity: Kuroshio Extension (KE), Subtropical Front (SF), California Coastal Current (CC) and Aleutian Islands (AI). Analyses show that anticyclonic eddies cause sea surface temperature, surface wind speed and precipitation rate to increase in all four subdomains, and vice versa. Through a further examination of the regional dependence of atmospheric responses to oceanic eddies, it is found that the strongest and the weakest surface wind speed responses (in winter and summer) are observed in the KE and AI region, respectively. For precipitation rate, seasonal variation of the atmospheric responses to oceanic eddies is strongest in winter and weakest in summer in the KE, CC and AI regions, but stronger in summer in the SF area. The reasons for such regional dependence and seasonality are the differences in the strength of SST anomalies, the vertical kinetic energy flux and atmospheric instability in the four subdomains. 149 the 90-day high pass-filtered surface EKE averaged from 2002 to 2010 in the North Pacific. The highest 150 EKE occurs in the KE and SF regions [42-43]. In addition, compared with adjacent areas, EKE is also 151 high in the AI and CC regions. The largest EKE in the KE region is primarily caused by the strong 152 horizontal shear and the meandering of the Kuroshio path [42]. The higher EKE in the SF region is 153 predominantly modulated by the baroclinic instability of the background currents [44]. The CC 154 region is characterized by strong eddy activity where the persistent equatorward wind causes coastal 155 upwelling fronts. Instability of these upwelling fronts results in eddy generation. The instability of 156 the coast shelf trapped jet causes the eddy formation in the AI region. One can see that the eddy 157 generation mechanisms are varied in the four subdomains, which could cause a difference in 158 mesoscale air-sea interaction characteristics in the four regions.159 160 Figure 2. 90-day high pass-filtered eddy kinetic energy (EKE; shaded) averaged from January 2002 to 161 December 2010. The black dashed lines delineate the four subdomains in this study.Remote Sens. 2020. 4 of 18 0.05 °C (for anticyclonic eddies), and radii larger than 20 km, are selected. As a result, there are about 138 14677, 19636, 16684 and 12220 cyclonic eddies, and 14469, 22043, 16747 and 13195 anticyclonic eddies 139 in the KE, SF, CC and AI regions, respectively. The matching method is adopted from Ma et al. [24]. 157 generation mechanisms are varied in the four subdomains, which could cause a difference in 158 mesoscale air-sea interaction characteristics in the four regions. Remote Sens. 2020. 5 of 18 Satellite altimetry data provides an opportunity to characterize eddies in terms of their basic 163 parameters such as polarity, lifetime, size, vorticity and moving speed in the ...

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Section: Introductionmentioning

confidence: 99%

Regional Dependence of Atmospheric Responses to Oceanic Eddies in the North Pacific Ocean

Chiang

et al. 2020

Remote Sensing

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“…As a ubiquitous phenomenon in the ocean, eddies play an important role in the transport and distribution of heat, salt, energy (Bishop et al, ; Chelton et al, , ; Chen et al, ; Chen, Gan, et al, ; Chen, Wang, et al, ; Chu et al, ; Dong et al, ; Liu et al, ; Roemmich & Gilson, ; Stammer, ; Stammer et al, ; Volkov et al, ; Wang et al, ; Xu et al, ; Yang et al, ; Z. G. Zhang et al, ; Z. W. Zhang et al, ), and marine biological and chemical processes (e.g., Gaube et al, ; Gruber et al, ; Johnson & McTaggart, ; Kouketsu et al, ; Vaillancourt et al, ). Dong et al () suggest that the global oceanic eddy movement can significantly influence distribution of the heat and fresh water in the ocean.…”

Section: Introductionmentioning

confidence: 99%

“…As a ubiquitous phenomenon in the ocean, eddies play an important role in the transport and distribution of heat, salt, energy Chelton et al, 2007Chelton et al, , 2011Chen et al, 2011;Chen, Gan, et al, 2012;Chen, Wang, et al, 2012;Chu et al, 2014;Dong et al, 2014;Liu et al, 2017;Roemmich & Gilson, 2001;Stammer, 1997;Stammer et al, 2001;Volkov et al, 2008;Wang et al, 2012;Xu et al, 2016;Yang et al, 2015;Z. G. Zhang et al, 2014;, and marine biological and chemical processes (e.g., Gaube et al, 2015;Gruber et al, 2011;Johnson & McTaggart, 2010;Kouketsu et al, 2016;Vaillancourt et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Oceanic Eddy Characteristics and Generation Mechanisms in the Kuroshio Extension Region

Dong

Zhang

et al. 2018

JGR Oceans

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The Kuroshio Extension region is well known for its strong eddy activity. In this paper, using satellite altimetry‐measured sea surface height anomaly data from 1993 to 2012 in an extended Kuroshio Extension region (140–180°E, 25–45°N), we analyze eddy characteristics: eddy size, polarity, lifetime, intensity, trajectory, and spatial and temporal distributions. Using temperature and salinity vertical profiles measured by Argo floats, we examine the eddy impact on vertical stratification. During the 20‐year period, 7,574 eddies are identified (based on following complete eddy trajectories) with a lifetime equal to or longer than 4 weeks. The numbers of cyclonic and anticyclonic eddies are found to be approximately the same. The distribution of eddy sizes peaks at a radius of about 40 km. The radius at the peak is at the same order as the first baroclinic deformation radius or the horizontal shear scale of the Kuroshio flow. The normalized eddy statistical characteristics show that eddies have different characteristics at different stages of their lifetimes. Among eddies with lifetimes longer than 50 weeks, more anticyclonic (cyclonic) eddies are found north (south) of 35°N. In contrast, among eddies with lifetimes shorter than 20 weeks, more cyclonic (anticyclonic) eddies are found north (south) of 35°N. The asymmetric distribution of eddies suggests two different eddy generation mechanisms: (1) the development of meanders in the Kuroshio path leading to the pinch off of eddies with longer lifetime (larger size) and (2) horizontal shear instability (barotropic instability) leading to eddies of shorter life (smaller size). We further apply an eddy‐resolved numerical product to quantitatively investigate the eddy generation mechanisms.

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“…This phenomenon is called “cold suction” [ Chen et al ., ]. The passage of the “cold suction” is also found from the Modular Ocean Assimilation System (MODAS) [ Fox et al ., ], which is improved to generate three‐dimensional (3‐D) ocean temperature and salinity fields based on sea surface observations [ Wang et al ., ] during the typhoon passage (Figure ). Figure shows that the isotherms from 0 to 100 m depth are lifted along 26.9°N, especially for the right side of the typhoon center.…”

Section: Resultsmentioning

confidence: 99%

Impact of sea spray on the Yellow and East China Seas thermal structure during the passage of Typhoon Rammasun (2002)

Zhang

Chu

et al. 2017

JGR Oceans

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Strong winds lead to large amounts of sea spray in the lowest part of the atmospheric boundary layer. The spray droplets affect the air‐sea heat fluxes due to their evaporation and the momentum due to the change of sea surface, and in turn change the upper ocean thermal structure. In this study, impact of sea spray on upper ocean temperatures in the Yellow and East China Seas (YES) during typhoon Rammasun's passage is investigated using the POMgcs ocean model with a sea spray parameterization scheme, in which the sea spray‐induced heat fluxes are based on an improved Fairall's sea spray heat fluxes algorithm, and the sea spray‐induced momentum fluxes are derived from an improved COARE version 2.6 bulk model. The distribution of the sea spray mediated turbulent fluxes was primarily located at Rammasun eye‐wall region, in accord with the maximal wind speeds regions. When Rammasun enters the Yellow sea, the sea spray mediated latent (sensible) heat flux maximum is enhanced by 26% (13.5%) compared to that of the interfacial latent (sensible) heat flux. The maximum of the total air‐sea momentum fluxes is enhanced by 43% compared to the counterpart of the interfacial momentum flux. Furthermore, the sea spray plays a key role in enhancing the intensity of the typhoon‐induced “cold suction” and “heat pump” processes. When the effect of sea spray is considered, the maximum of the sea surface cooling in the right side of Rammasun's track is increased by 0.5°C, which is closer to the available satellite observations.

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Heat, salt and volume transports by eddies in the vicinity of the Luzon Strait

Cited by 39 publications

References 46 publications

Regional Dependence of Atmospheric Responses to Oceanic Eddies in the North Pacific Ocean

Regional Dependence of Atmospheric Responses to Oceanic Eddies in the North Pacific Ocean

Oceanic Eddy Characteristics and Generation Mechanisms in the Kuroshio Extension Region

Impact of sea spray on the Yellow and East China Seas thermal structure during the passage of Typhoon Rammasun (2002)

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