. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Ice dynamics and thermodynamics 219 170" 169° 168° 167° 166° 165°. •60° 174° Figure 13-7. Dynamic topography between 2 March and 15 March 1979 computed from CTD stations illustrated in Fig. 13-2. Note northwesterly set of lines of constant topography. This implies a relatively weak northwesterly current. the southern margin; ice processes over the Bering Sea shelf can thus be thought of as a conveyor belt. The interaction between the dynamic and thermo- dyna
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Ice dynamics and thermodynamics 219 170" 169° 168° 167° 166° 165°. •60° 174° Figure 13-7. Dynamic topography between 2 March and 15 March 1979 computed from CTD stations illustrated in Fig. 13-2. Note northwesterly set of lines of constant topography. This implies a relatively weak northwesterly current. the southern margin; ice processes over the Bering Sea shelf can thus be thought of as a conveyor belt. The interaction between the dynamic and thermo- dynamic processes of decay along the margin was ex- plored for March 1979 using measurements taken from the NOAA ship Surveyor. This analysis and remote sensing analysis by McNutt (Chapter 10, this volume) show that the same processes were at work during 1979, an extremely light ice year, as in 1974, a medium-heavy ice year (Muench and Ahlnas 1976). This suggests that the extent of the pack ice from one year to another is a function of both the advective scheme and thermodynamic processes. The conveyor belt process of ice growth and decay is responsible for enhancing salt content in northern and coastal waters (ice production areas) and reduc- ing salinity, resulting in stratified waters along the ice margin. This process has a considerable effect on the structure of water properties of the shelf, at least during the winter season. The vigor of the advective scheme, , wind blowing the ice, also affects the extent of freezing. ACKNOWLEDGMENTS This study was funded through the Marine Services Project at Pacific Marine Environmental Laboratories. The cruise time on the NOAA ship Surveyor was requested by the late Robert Charnell of PMEL and arranged by the OCSEAP Juneau Project Office. Dr. Seelye Martin of the Department of Oceanography at the University of Washington acted as chief scientist on the cruise. The routine oceanographic measure-. Please note that these images
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