FN Archimer Export Format
PT J
TI Influence of air–sea coupling on Indian Ocean tropical cyclones
BT 
AF Lengaigne, Matthieu
   Neetu, S.
   Samson, Guillaume
   Vialard, Jérôme
   Krishnamohan, K. S.
   Masson, Sébastien
   Jullien, Swen
   Suresh, I.
   Menkes, Christophe E.
AS 1:1,2;2:3;3:4;4:1;5:1;6:1;7:5;8:3;9:1,6;
FF 1:;2:;3:;4:;5:;6:;7:PDG-ODE-LOPS-SIAM;8:;9:;
C1 Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRDMNHN, LOCEAN Laboratory, IPSL, Paris, France
   Indo.French Cell for Water Sciences, IISc.NIO.IITM.IRD Joint International Laboratory, National Institute of Oceanography, Dona Paula, Goa, India
   CSIR-National Institute of Oceanography, Dona Paula, Goa, India
   Mercator Ocean, Ramonville.Saint.Agne, France
   Laboratoire d’Océanographie Physique et Spatiale (LOPS), Univ. Brest, CNRS, IRD, Ifremer, IUEM, Plouzané, France
   Centre IRD, Nouméa, New Caledonia
C2 UNIV PARIS 06, FRANCE
   NIO, INDIA
   CSIR (INDIA), INDIA
   MERCATOR OCEAN, FRANCE
   IFREMER, FRANCE
   IRD, FRANCE
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-p187
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 4.486
TC 17
UR https://archimer.ifremer.fr/doc/00429/54017/85039.pdf
LA English
DT Article
DE ;Tropical cyclones;Air-sea coupling;Indian Ocean;Cold wake;Regional coupled ocean-atmosphere model
AB This paper assesses the impact of air–sea coupling on Indian Ocean tropical cyclones (TCs) by comparing a 20-year long simulation of a ¼° regional coupled ocean–atmosphere model with a twin experiment, where the atmospheric component is forced by sea surface temperature from the coupled simulation. The coupled simulation reproduces the observed spatio-temporal TCs distribution and TC-induced surface cooling reasonably well, but overestimates the number of TCs. Air–sea coupling does not affect the cyclogenesis spatial distribution but reduces the number of TCs by ~ 20% and yields a better-resolved bimodal seasonal distribution in the northern hemisphere. Coupling also affects intensity distribution, inducing a four-fold decrease in the proportion of intense TCs (Cat-2 and stronger). Air–sea coupling damps TCs growth through a reduction of inner-core upward enthalpy fluxes due to the TC-induced cooling. This reduction is particularly large for the most intense TCs of the northern Indian Ocean (up to 250 W m−2), due to higher ambient surface temperatures and larger TC-induced cooling there. The negative feedback of air–sea coupling on strongest TCs is mainly associated with slow-moving storms, which spend more time over the cold wake they induce. Sensitivity experiments using a different convective parameterization yield qualitatively similar results, with a larger (~ 65%) reduction in the number of TCs. Because of their relatively coarse resolution (¼°), both set of experiments however fail to reproduce the most intense observed TCs. Further studies with finer resolution models in the Bay of Bengal will be needed to assess the expectedly large impact of air–sea coupling on those intense and deadly TCs. 
PY 2019
PD JAN
SO Climate Dynamics
SN 0930-7575
PU Springer Nature
VL 52
IS 1-2
UT 000460619200034
BP 577
EP 598
DI 10.1007/s00382-018-4152-0
ID 54017
ER

EF