FN Archimer Export Format
PT J
TI Dense shelf water production in the Adélie Depression, East Antarctica, 2004-2012: Impact of the Mertz Glacier calving
BT 
AF LACARRA, Maite
   HOUSSAIS, Marie-Noelle
   HERBAUT, Christophe
   SULTAN, Emmanuelle
   BEAUVERGER, Mickael
AS 1:1;2:1;3:1;4:1;5:1,2;
FF 1:;2:;3:;4:;5:;
C1 Sorbonne Universités (UPMC Univ, Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, Paris, France
   IFREMER, LM2E, Plouzane, France.
C2 UNIV PARIS 06, FRANCE
   CNRS, FRANCE
UM BEEP-LM2E
TC 29
UR https://archimer.ifremer.fr/doc/00204/31514/29928.pdf
LA English
DT Article
CR ALBION 2007
   ALBION 2008
   ALBION 2009
   ALBION 2010
   ALBION 2011
   ICOTA 2004
   ICOTA 2005
BO L'Astrolabe
AB Summer repeated hydrographic surveys and 4 years of mooring observations are used to characterize for the first time the interannual variability of the bottom water in the Mertz Glacier Polynya (MGP) on the East Antarctic shelf (142°E–146°E). Until 2010, large interannual variability was observed in the summer bottom salinity with year-to-year changes reaching 0.12 in Commonwealth Bay, the region with the highest sea ice production. The summer variability was shown to be linked to the efficiency of the convection during the preceding winter. The recent freshening of the bottom waters subsequent to the Mertz Glacier calving was well beyond the range of the precalving interannual variability. Within 2 years after the event, the bottom water of the shelf became too light to possibly contribute to renewal of the Antarctic Bottom Water. Rough estimates of the freshwater budget of the Adélie Depression indicate that the freshening necessary to compensate for net sea ice production in the MGP did not change drastically after the Mertz calving. The year-to-year salinity changes appeared to respond to the MGP activity. Yet, prior to the calving, the convective system in the polynya was also partly controlled by the late winter bottom salinity through a mechanism leading to a sequence of alternatively fresher and more saline bottom waters over the period 2007–2010. Exceptional events like the Mertz calving seem to be able to switch over the system into a less stratified state where convection responds more directly to changes in the surface forcing.
PY 2014
PD AUG
SO Journal Of Geophysical Research-oceans
SN 0148-0027
PU Amer Geophysical Union
VL 119
IS 8
UT 000342519500029
BP 5203
EP 5220
DI 10.1002/2013JC009124
ID 31514
ER

EF