The effects of oceanic barrier layer on the upper ocean response to tropical cyclones

2017 ◽  
Vol 122 (6) ◽  
pp. 4829-4844 ◽  
Author(s):  
Youfang Yan ◽  
Li Li ◽  
Chunzai Wang
Keyword(s):  
Tropical Cyclones ◽  
Barrier Layer ◽  
Upper Ocean ◽  
Ocean Response ◽  
Upper Ocean Response

scholarly journals Upper Ocean Response to Two Sequential Tropical Cyclones over the Northwestern Pacific Ocean

2019 ◽  
Vol 11 (20) ◽  
pp. 2431 ◽  
Author(s):  
Jue Ning ◽  
Qing Xu ◽  
Tao Feng ◽  
Han Zhang ◽  
Tao Wang
Keyword(s):  
Pacific Ocean ◽  
Tropical Cyclones ◽  
Mixed Layer ◽  
Upper Ocean ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Surface Cooling ◽  
Chl A ◽  
Ocean Response ◽  
Upper Ocean Response

The upper ocean thermodynamic and biological responses to two sequential tropical cyclones (TCs) over the Northwestern Pacific Ocean were investigated using multi-satellite datasets, in situ observations and numerical model outputs. During Kalmaegi and Fung-Wong, three distinct cold patches were observed at sea surface. The locations of these cold patches are highly correlated with relatively shallower depth of the 26 °C isotherm and mixed layer depth (MLD) and lower upper ocean heat content. The enhancement of surface chlorophyll a (chl-a) concentration was detected in these three regions as well, mainly due to the TC-induced mixing and upwelling as well as the terrestrial runoff. Moreover, the pre-existing ocean cyclonic eddy (CE) has been found to significantly modulate the magnitude of surface cooling and chl-a increase. With the deepening of the MLD on the right side of TCs, the temperature of the mixed layer decreased and the salinity increased. The sequential TCs had superimposed effects on the upper ocean response. The possible causes of sudden track change in sequential TCs scenario were also explored. Both atmospheric and oceanic conditions play noticeable roles in abrupt northward turning of the subsequent TC Fung-Wong.

scholarly journals Upper ocean response to tropical cyclones: a review

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Han Zhang ◽  
Hailun He ◽  
Wen-Zhou Zhang ◽  
Di Tian
Keyword(s):  
Tropical Cyclones ◽  
Numerical Models ◽  
Environmental Parameters ◽  
Surface Flux ◽  
Sea Surface Salinity ◽  
Upper Ocean ◽  
Surface Salinity ◽  
Translation Speed ◽  
Ocean Response ◽  
Upper Ocean Response

AbstractTropical cyclones (TCs) are strong natural hazards that are important for local and global air–sea interactions. This manuscript briefly reviews the knowledge about the upper ocean responses to TCs, including the current, surface wave, temperature, salinity and biological responses. TCs usually cause upper ocean near-inertial currents, increase strong surface waves, cool the surface ocean, warm subsurface ocean, increase sea surface salinity and decrease subsurface salinity, causing plankton blooms. The upper ocean response to TCs is controlled by TC-induced mixing, advection and surface flux, which usually bias to the right (left) side of the TC track in the Northern (Southern) Hemisphere. The upper ocean response usually recovers in several days to several weeks. The characteristics of the upper ocean response mainly depend on the TC parameters (e.g. TC intensity, translation speed and size) and environmental parameters (e.g. ocean stratification and eddies). In recent decades, our knowledge of the upper ocean response to TCs has improved because of the development of observation methods and numerical models. More processes of the upper ocean response to TCs can be studied by researchers in the future.

The upper ocean response to tropical cyclones in the northwestern Pacific analyzed with Argo data

2007 ◽  
Vol 25 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Zenghong Liu ◽  
Jianping Xu ◽  
Bokang Zhu ◽  
Chaohui Sun ◽  
Lifeng Zhang
Keyword(s):  
Tropical Cyclones ◽  
Upper Ocean ◽  
Northwestern Pacific ◽  
Argo Data ◽  
Ocean Response ◽  
Upper Ocean Response

scholarly journals Upper-Ocean Response to Precipitation Forcing in an Ocean Model Hindcast of Hurricane Gonzalo

2020 ◽  
Vol 50 (11) ◽  
pp. 3219-3234
Author(s):  
John Steffen ◽  
Mark Bourassa
Keyword(s):  
Barrier Layer ◽  
Turbulent Mixing ◽  
Ocean Model ◽  
Upper Ocean ◽  
Freshwater Flux ◽  
Model Case ◽  
Near Surface ◽  
Ocean Stratification ◽  
Ocean Response ◽  
Upper Ocean Response

AbstractPreexisting, oceanic barrier layers have been shown to limit turbulent mixing and suppress mixed layer cooling during the forced stage of a tropical cyclone (TC). Furthermore, an understanding of barrier layer evolution during TC passage is mostly unexplored. High precipitation rates within TCs provide a large freshwater flux to the surface that alters upper-ocean stratification and can act as a potential mechanism to strengthen the barrier layer. Ocean glider observations from the Bermuda Institute of Ocean Sciences (BIOS) indicate that a strong barrier layer developed during the approach and passage of Hurricane Gonzalo (2014), primarily as a result of freshening within the upper 30 m of the ocean. Therefore, an ocean model case study of Hurricane Gonzalo has been designed to investigate how precipitation affects upper-ocean stratification and sea surface temperature (SST) cooling during TC passage. Ocean model hindcasts of Hurricane Gonzalo characterize the upper-ocean response to TC precipitation forcing. Three different vertical mixing parameterizations are tested to determine their sensitivity to precipitation forcing. For all turbulent mixing schemes, TC precipitation produces near-surface freshening of about 0.3 psu, which is consistent with previous studies and in situ ocean observations. The influence of precipitation-induced changes to the SST response is more complicated, but generally modifies SSTs by ±0.3°C. Precipitation forcing creates a dynamical coupling between upper-ocean stratification and current shear that is largely responsible for the heterogeneous response in modeled SSTs.

scholarly journals Upper Ocean Response to Rain Observed From a Vertical Profiler

2019 ◽  
Vol 124 (6) ◽  
pp. 3664-3681 ◽  
Author(s):  
A. Doeschate ◽  
G. Sutherland ◽  
H. Bellenger ◽  
S. Landwehr ◽  
L. Esters ◽  
...  
Keyword(s):  
Upper Ocean ◽  
Ocean Response ◽  
Upper Ocean Response
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