DOI: 10.1007/s00382-014-2252-z
Scopus记录号: 2-s2.0-84939884988
论文题名: Regional mesoscale air–sea coupling impacts and extreme meteorological events role on the Mediterranean Sea water budget
作者: Lebeaupin Brossier C. ; Bastin S. ; Béranger K. ; Drobinski P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 44, 期: 2017-03-04 起始页码: 1029
结束页码: 1051
语种: 英语
英文关键词: Air–sea coupling
; Extreme events
; HyMeX
; Med-CORDEX
; Mediterranean Sea
; MORCE
; Water budget
英文摘要: The Mediterranean Sea water budget (MWB) is a key parameter, as it controls the Mediterranean Sea water loss and thus the Atlantic Water inflow and the Mediterranean general circulation. More accurately, the MWB controls the net flow through the Strait of Gibraltar, which implies both inflow and outflow. Generally considered at the basin scale and over long-term periods, the MWB is in fact characterized by a large variability in space and time, induced by the complex topography of the region, mesoscale processes and (short) intense events in the ocean and atmosphere compartments. In this study, we use an ocean-atmosphere coupled system at mesoscale able to represent such phenomena, to evaluate the MWB atmospheric components: Evaporation (E) and Precipitation (P). We compare two companion regional simulations: an uncoupled atmospheric run using the ERA-interim Sea Surface Temperature (SST) reanalysis and a coupled run using the MORCE system with the two-way coupling between the NEMO-MED12 eddy-resolving ocean model and the non-hydrostatic Weather Research and Forecasting atmospheric model. We first evaluate the SST validity against satellite data and evidence the coupled system ability in representing SST mesoscale structures, characteristics of the Mediterranean circulation and of small-scale ocean processes, despite a colder mean value and a lower amplitude of the annual cycle. Then, the comparison aims to examine the coupled processes effects (meaning the impacts of the interactive high-resolution and high-frequency SST) on E and P and on their variability. The comparison highlights that the SST is the controlling factor for E and P budgets, with reduction by 6 and 3 % in the coupled run compared to the uncoupled run, respectively. The modifications propagate until 750 km inland far from the Mediterranean coast, as towards the Atlantic Ocean and the Black Sea. This indicates that coupling plays a major role in distributing water at mesoscale. The coupling directly modifies the seasonal variability. It also significantly decreases extreme evaporation and precipitation occurences and intensities. This extreme events mitigation in the coupled run contributes for ~50 % to the decrease in the E and P budgets. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54655
Appears in Collections: 过去全球变化的重建
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作者单位: Groupe d’études de l’Atmosphère Météorologique - Centre National de Recherches Météorologiques (GAME-CNRM), CNRS UMR3589/Météo-France, 42 Avenue Coriolis, Toulouse Cedex, France; Laboratoire Atmosphères Milieux Observations Spatiales (LATMOS), CNRS UMR8190/UVSQ/UPMC, Guyancourt, France; Ecole Nationale Supérieure de Techniques Avancées (ENSTA) - ParisTech, Unité de Mécanique (UME), Palaiseau, France; Laboratoire de Météorologie Dynamique (LMD, CNRS UMR8539/Ecole Polytechnique/ENS/UPMC, Palaiseau, France
Recommended Citation:
Lebeaupin Brossier C.,Bastin S.,Béranger K.,et al. Regional mesoscale air–sea coupling impacts and extreme meteorological events role on the Mediterranean Sea water budget[J]. Climate Dynamics,2014-01-01,44(2017-03-04)