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Synonym: ASAC Project 2298
Date: September - October 2003
Region: between approximately 110 and 140ºE
Participants: Andreas Pfaffling, Dennis Otto, Ingo Richter

 

Type of activity:

  • Sea ice remote sensing validation
    With its ability to monitor vast regions in a timely, repetitive and cost-effective manner, satellite remote sensing is a key tool in global climate and climate-change research. A number of important new satellite sensors have recently been launched, but so far, little work has been carried out to validate key satellite-derived Antarctic sea-ice geophysical products. The primary aim of this large program will be to obtain in-situ data on Antarctic sea ice to calibrate and validate the new satellite products.
    During this program the ship will be used for 18 days to characterize sea ice conditions and changes in an experimental area of about 75 km x 100 km. We will enter the ice to the east of Casey and, although the experiment will be performed on this one patch of sea ice, we expect that the ice will drift 200-300 km towards Casey during the experiment. The drift of the ice will be monitored with an array of 12 or more satellite-tracked buoys. There are number of subsidiary projects involved in this program, and a team of about 30 researchers, including international collaborators from institutions in Belgium, China, Germany, Japan and USA. Major components of the program will involve intensive helicopter operations for aerial photography, geophysical measurements, buoy deployment and floe access; and in-situ sampling and measurements on ice floes at a number of sites alongside the ship.
  • Sediment trap recovery and replacement.
  • Delivery of personnel and essential cargo for Casey base

 


 

 

Area of activity:

The mooring work will be done on the transit from Tasmania to Antarctica on approximately 142ºE. The sea-ice experiment will take place within the seasonal sea-ice zone to the south of the Antarctic Divergence and between approximately 110 and 140ºE (red arrow on map). The exact location will be chosen during the cruise itself, depending on ice conditions. Before returning to Hobart the ship will call in to Casey Base do deliver personnel an goods by helicopter.

 

 

 

Main scientific equipment used at the ship:

  • airborne EM-bird (AWI)
  • sledge pulled EMI
  • Ground penetrating Radar (AWI)

 

Schedule:


 
Location Arrival Date Departure Date Activity
Hobart 7th September 9th September On hire, bunker, load AVCAT, load Davis SAB and 2 x AS350BA helicopters, load & install marine science equipment. Embark personnel, essential, light Casey Cargo.
Marine Science 9th September 10th September Trial cruise - test marine science equipment
Port Arthur 10th September 12th September Marine science equipment calibration
Marine Science 14th September 16th September Attempt mooring recovery &replacement at 47S142E – SAZB.
Marine Science 20th September 22nd September Mooring replacement at 54S142E – SAZC.
Marine Science 26th September 28th September Mooring replacement at 61S142E – SAZF.
Marine Science 1st October 18th October Sea ice validation, somewhere between 110E and 140E.
Casey 19th October 25th October Fly-off of personnel and light essential cargo.
Hobart 1st November   Arrival back – disembark and unload

 

International co-operation:

  • Australian Bureau of Meteorology;
  • Alfred-Wegener-Institut, Germany;
  • Geology Department, University of Tasmania;
  • National Snow and Ice Data Center, Univ. of Colorado, USA;
  • Oceans and Ice Branch, NASA GSFC, USA;
  • Université Libre de Bruxelles, Belgium;
  • Université de Liège, Belgium;
  • Radar Systems and Remote Sensing Laboratory, Univ. of Kansas;
  • US Naval Research Lab (perhaps);
  • CSIRO Marine Research, Hobart, Tasmania;
  • CSIRO Division of Atmospheric Research, Melbourne;
  • Institute of Low Temperature Science, Japan;
  • Kitami Institute of Technology, Japan;
  • Center for Environmental Remote Sensing, Chiba University, Japan;
  • Polar Research Institute of China;
  • New York University.

 

Example results:

HEM ice thickness track overlayd on MODIS scenes from Oct. 19th & 20th 2003
HEM track by Andreas Pfaffling, MODIS scenes courtesy of Ted Scambos.


 
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