Sea‐ice production over the Laptev Sea shelf inferred from historical summer‐to‐winter hydrographic observations of 1960s–1990s
Identifieur interne : 000398 ( Istex/Checkpoint ); précédent : 000397; suivant : 000399Sea‐ice production over the Laptev Sea shelf inferred from historical summer‐to‐winter hydrographic observations of 1960s–1990s
Auteurs : Igor A. Dmitrenko [Allemagne] ; Sergey A. Kirillov [Russie] ; L. Bruno Tremblay [Canada] ; Dorothea Bauch [Allemagne] ; Sascha Willmes [Allemagne]Source :
- Geophysical Research Letters [ 0094-8276 ] ; 2009-07.
Abstract
The winter net sea‐ice production (NSIP) over the Laptev Sea shelf is inferred from continuous summer‐to‐winter historical salinity records of 1960s–1990s. While the NSIP strongly depends on the assumed salinity of newly formed ice, the NSIP quasi‐decadal variability can be linked to the wind‐driven circulation anomalies in the Laptev Sea region. The increased wind‐driven advection of ice away from the Laptev Sea coast when the Arctic Oscillation (AO) is positive implies enhanced coastal polynya sea‐ice production and brine release in the shelf water. When the AO is negative, the NSIP and seasonal salinity amplitude tends to weaken. These results are in reasonable agreement with sea‐ice observations and modeling.
Url:
DOI: 10.1029/2009GL038775
Affiliations:
- Allemagne, Canada, Russie
- Québec, Rhénanie-Palatinat, Schleswig-Holstein
- Kiel, Montréal, Trèves (Allemagne)
- Université McGill, Université de Trèves
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<front><div type="abstract">The winter net sea‐ice production (NSIP) over the Laptev Sea shelf is inferred from continuous summer‐to‐winter historical salinity records of 1960s–1990s. While the NSIP strongly depends on the assumed salinity of newly formed ice, the NSIP quasi‐decadal variability can be linked to the wind‐driven circulation anomalies in the Laptev Sea region. The increased wind‐driven advection of ice away from the Laptev Sea coast when the Arctic Oscillation (AO) is positive implies enhanced coastal polynya sea‐ice production and brine release in the shelf water. When the AO is negative, the NSIP and seasonal salinity amplitude tends to weaken. These results are in reasonable agreement with sea‐ice observations and modeling.</div>
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