Effects of the air–sea coupling time frequency on the ocean response during Mediterranean intense events

Brossier, Cindy Lebeaupin; Ducrocq, Véronique; Giordani, Hervé

doi:10.1007/s10236-009-0198-1

Cited by 15 publications

(7 citation statements)

References 23 publications

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“…In the NOCPL experiment, the SST remains constant throughout the simulation. In the OML1D experiment, the SST evolves by activating the 1D oceanic mixing layer model which is part of the SURFEX model [43]. The latest simulation, CPL3D, includes the fully coupled system in which the atmosphere and ocean exchange information every hour.…”

Section: Atmosphere-ocean Coupled System and Numerical Experimentsmentioning

confidence: 99%

The Effect of Atmosphere-Ocean Coupling on the Structure and Intensity of Tropical Cyclone Bejisa in the Southwest Indian Ocean

et al. 2021

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A set of numerical simulations is relied upon to evaluate the impact of air-sea interactions on the behaviour of tropical cyclone (TC) Bejisa (2014), using various configurations of the coupled ocean-atmosphere numerical system Meso-NH-NEMO. Uncoupled (SST constant) as well as 1D (use of a 1D ocean mixed layer) and 3D (full 3D ocean) coupled experiments are conducted to evaluate the impact of the oceanic response and dynamic processes, with emphasis on the simulated structure and intensity of TC Bejisa. Although the three experiments are shown to properly capture the track of the tropical cyclone, the intensity and the spatial distribution of the sea surface cooling show strong differences from one coupled experiment to another. In the 1D experiment, sea surface cooling (∼1 ∘C) is reduced by a factor 2 with respect to observations and appears restricted to the depth of the ocean mixed layer. Cooling is maximized along the right-hand side of the TC track, in apparent disagreement with satellite-derived sea surface temperature observations. In the 3D experiment, surface cooling of up to 2.5 ∘C is simulated along the left hand side of the TC track, which shows more consistency with observations both in terms of intensity and spatial structure. In-depth cooling is also shown to extend to a much deeper depth, with a secondary maximum of nearly 1.5 ∘C simulated near 250 m. With respect to the uncoupled experiment, heat fluxes are reduced from about 20% in both 1D and 3D coupling configurations. The tropical cyclone intensity in terms of occurrence of 10-m TC wind is globally reduced in both cases by about 10%. 3D-coupling tends to asymmetrize winds aloft with little impact on intensity but rather a modification of the secondary circulation, resulting in a slight change in structure.

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Section: Atmosphere-ocean Coupled System and Numerical Experimentsmentioning

confidence: 99%

The Effect of Atmosphere-Ocean Coupling on the Structure and Intensity of Tropical Cyclone Bejisa in the Southwest Indian Ocean

et al. 2021

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“…Using 2.4 km atmospheric forcing, Lebeaupin-Brossier et al (2009) investigated the impact of the air-sea coupling time frequency on the winter ocean mixed layer in the GoL. A time resolution of 3-6 h was shown to be too coarse to reproduce a fine-scale response of the ocean: internal ocean boundary layers as well as cooling and deepening of the ocean mixed layer under heavy precipitation events were not reproduced.…”

Section: Introductionmentioning

confidence: 97%

Influence of high-resolution wind forcing on hydrodynamic modeling of the Gulf of Lions

Schaeffer

Garreau²,

Molcard³

et al. 2011

Ocean Dynamics

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The impact of the choice of high-resolution atmospheric forcing on ocean summertime circulation in the Gulf of Lions (GoL; Mediterranean Sea) is evaluated using three different datasets: AROME (2.5 km, 1 h), ALADIN (9.5 km, 3 h), and MM5 (9 km, 3 h). A shortterm ocean simulation covering a 3-month summer period was performed on a 400-m configuration of the GoL. The main regional features of both wind and oceanic dynamics were well-reproduced by all three atmospheric models. Yet, at smaller scales and for specific hydrodynamic processes, some differences became apparent. Inertial oscillations and mesoscale variability were accentuated when highresolution forcing was used. Sensitivity tests suggest a predominant role for spatial rather than temporal resolution of wind. The determinant influence of wind stress curl was evidenced, both in the representation of a mesoscale eddy structure and in the generation of a specific upwelling cell in the north-western part of the gulf.

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“…Notably, AROME-WMED explicitly solves the atmospheric convection, which is mandatory to well reproduce heavy precipitating systems. In fact, a high space-time resolution is necessary to accurately represent the intense and short peaks in the wind and/or precipitation surface forcing induced by intense weather systems in the Mediterranean region and thus the ocean response (Lebeaupin Brossier et al, 2009b, 2011. The highresolution ocean simulation covering the whole SOP1 is used as a numerical laboratory and enables us to follow the 4D evolution of the OML in the whole western Mediterranean Sea.…”

Section: Introductionmentioning

confidence: 99%

Ocean Mixed Layer responses to intense meteorological events during HyMeX-SOP1 from a high-resolution ocean simulation

et al. 2014

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Effects of the air–sea coupling time frequency on the ocean response during Mediterranean intense events

Cited by 15 publications

References 23 publications

The Effect of Atmosphere-Ocean Coupling on the Structure and Intensity of Tropical Cyclone Bejisa in the Southwest Indian Ocean

The Effect of Atmosphere-Ocean Coupling on the Structure and Intensity of Tropical Cyclone Bejisa in the Southwest Indian Ocean

Influence of high-resolution wind forcing on hydrodynamic modeling of the Gulf of Lions

Ocean Mixed Layer responses to intense meteorological events during HyMeX-SOP1 from a high-resolution ocean simulation

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