HR: 10:20h
AN: C22A-01 INVITED    [Abstracts]
TI: Observing the Dynamic Component of the Arctic Sea Ice Mass Balance
AU: * Richter-Menge, J
EM: Jacqueline.A.Richter-Menge@erdc.usace.army.mil
AF: Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755, United States
AU: Hutchings, J
EM: jenny@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks 930 Koyukuk Drive P.O. Box 757340, Fairbanks, AK 99775, United States
AU: Geiger, C
EM: cgeiger@udel.edu
AF: University of Delaware, Department of Geography c/o CRREL 72 Lyme Road, Hanover, NH 03755, United States
AB: Changes in the mass balance of the Arctic sea ice cover are a function of thermodynamic (ice growth, melt and decay) and dynamic (formation of leads and ridges and transport) processes. Improvements in model predictions of the fate of the Arctic sea ice cover can be made by improving the understanding of these contributing processes. The Sea Ice Experiment: Dynamic Nature of the Arctic (SEDNA) project has been undertaken to further explore the mechanical redistribution of the ice cover through direct observations. SEDNA features a joint field-remote sensing-modeling campaign. The field campaign was recently completed in April 2007, operating out of an ice camp in the Alaskan Beaufort Sea at the edge of the perennial ice pack. The design of the field campaign built on previous related work, much of it based on data collected during the Arctic Ice Dynamics Joint Experiment (AIDJEX, 1975-76), the Sea Ice Mechanics Initiative (SIMI, 1993-94), and Surface HEat Budget of the Arctic (SHEBA, 1997-98). We will describe the application of recent technological advances, including satellite and airborne instrumentation and autonomous buoys, which allowed us to make a suite of highly coordinated measurements of ice stress, strain rate and redistribution on scales ranging from 10 km to 1000 km. A major end product of SEDNA will be a comprehensive data set to validate and improve dynamic- thermodynamic sea ice models.
DE: 0750 Sea ice (4540)
DE: 0762 Mass balance (1218, 1223)
DE: 0774 Dynamics
DE: 0794 Instruments and techniques
SC: Cryosphere [C]
MN: 2007 Fall Meeting