Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya
Journal of Geophysical Research. Bd. 115. H. C5. American Geophysical Union (AGU) 2010 S. 1 - 9 C05015
Erscheinungsjahr: 2010
Publikationstyp: Zeitschriftenaufsatz
Sprache: Deutsch
Doi/URN: 10.1029/2009jc005798
Inhaltszusammenfassung
This paper examines a hydrographic response to the wind‐driven coastal polynya activity over the southeastern Laptev Sea shelf for April–May 2008, using a combination of Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) and TerraSAR‐X satellite imagery, aerial photography, meteorological data, and SBE‐37 salinity‐temperature‐depth and acoustic Doppler current profiler land‐fast ice edgemoored instruments. When ASAR observed the strongest end‐of‐April polynya event wi...This paper examines a hydrographic response to the wind‐driven coastal polynya activity over the southeastern Laptev Sea shelf for April–May 2008, using a combination of Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) and TerraSAR‐X satellite imagery, aerial photography, meteorological data, and SBE‐37 salinity‐temperature‐depth and acoustic Doppler current profiler land‐fast ice edgemoored instruments. When ASAR observed the strongest end‐of‐April polynya event with frazil ice formation, the moored instruments showed maximal acoustical scattering within the surface mixed layer, and the seawater temperatures were either at or 0.02°C below freezing. We also find evidence of the persistent horizontal temperature and salinity gradients across the fast ice edge to have the signature of geostrophic flow adjustment as predicted by polynya models.» weiterlesen» einklappen
Autoren
Klassifikation
DDC Sachgruppe:
Naturwissenschaften
