FN Archimer Export Format
PT J
TI Drivers of marine heatwaves in a stratified marginal sea
BT 
AF Gröger, Matthias
   Dutheil, Cyril
   Börgel, Florian
   Meier, Markus H. E.
AS 1:1;2:1,2;3:1;4:1;
FF 1:;2:;3:;4:;
C1 Department of Physical Oceanography and Instrumentation, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany
   MARBEC, University of Montpellier, CNRS, Ifremer, IRD, Sète, France, Montpellier, France
C2 LEIBNIZ INST BALT SEA RES (IOW), GERMANY
   IRD, FRANCE
SI SETE
SE IRD
UM MARBEC
IF 4.6
TC 0
UR https://archimer.ifremer.fr/doc/00872/98375/107737.pdf
   https://archimer.ifremer.fr/doc/00872/98375/107738.pdf
LA English
DT Article
AB Marine heatwaves (MHWs) can cause devastating impacts in coastal marine ecosystems, particularly in shallow marginal seas, thereby making the understanding of the drivers of these events of paramount importance. Here, drivers for summer and winter MHWs are explored for the period 1980–2016 in the Baltic Sea, a mid-latitude marginal sea with a permanent haline water-column stratification located on the northwestern European shelf. It was found that summer MHWs are mainly forced by local meteorological conditions over the open water. They are caused by a dominant blocking over Scandinavia promoting anomalous strong shortwave downflux, calm winds, and low vertical mixing with colder sub-thermocline waters. Wintertime MHWs are linked to the advection of warm and moist air originating from the North Atlantic. These air masses lower the oceanic net heat loss at the sea surface primarily in the form of reduced latent and sensible heat losses. Vertical ocean dynamics are also affected during winter MHWs. This study finds a strengthened coastal up- and downwelling due to anomalous strong westerly winds during the time before MHWs culminate in their maximal surface extension. 
PY 2024
PD JAN
SO Climate Dynamics
SN 0930-7575
PU Springer Science and Business Media LLC
DI 10.1007/s00382-023-07062-5
ID 98375
ER

EF