These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: 26 Feb 1989 - 10 Mar 1989 Observers: Unknown Translation to ASPeCt data format: Vladimir Smirnov Summary of voyage track: 26/2 Ice edge at approx. 71S, 138W 26/2-2/3 Ice edge to Russkaya (136W) partly in company with Prof Zubov. 7-10/3 West through Ross Sea 10/3 Ice edge at approx. 74S, 176E The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: 06 Jan 1993 - 03 Feb 1993 Observers: Unknown Translation to ASPeCt data format: Vladimir Smirnov Summary of voyage track: 6/1 Ice edge at approx. 63S, 80E 6-8/1 From ice edge to Mirny (93E) 12-18/1 From Mirny to Dumont d'Urville (140E) 18-20/1 From DD to Leningradskaya (159E) 21-23/1 From Leningradskaya to McMurdo (168E) 29/1-1/2 From McMurdo to Russkaya (136W) 1-3/2 From Russkaya to Bellingshausen (59W) No observations after Bellingshausen The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: May 1992 to June 1992 Observers: Unknown The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: 15 Dec 1990 - 17 Jan 1991 Observers: Unknown Translation to ASPeCt format: Vladimir Smirnov Summary of voyage track: 15/12 Ice edge at approx. 60S, 23E 15-22/12 Steam to Molodezhnaya (45E) 24-28/12 Steam to Progress (75E) 28-31/12 Steam to Mirny (93E) 1-7/1 Ship stopped at Mirny 8-14/1 Vicinity of Mirny, Farr Bay 16-17/1 Steam to ice edge at approx. 64S, 94E The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

In 1985, the Nella Dan was trapped in sea ice for several weeks while undertaking a marine science voyage. During the time it was trapped, iceberg drift was measured in the region, tracking the movement of several icebergs relative to the ship. Iceberg movements included mt biscoe angle, bearing, and ship position so can get rotations with redundancy. Observations were done several times a day. The physical logs are archived at the Australian Antarctic Division.

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: United States Vessel: Nathaniel B. Palmer Dates in ice: 26 Dec 1999 - 06 Feb 2000 Observers: Steve Ackley, Jackie Ackley, others Summary of voyage track: 26/12 Ice edge at approx. 67S, 180 26/12 - 14/1 Complicated cruise track through the Ross Sea toward SE then NE to 128W 14/1 - 6/2 Back through pack ice toward the west 6/2 Obs completed at Cape Colbeck (157W) The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER HH:MM:SS VISIBILITY CODE CLOUD IN OKTAS WEATHER CODE COMMENTS

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: 31 Dec 1993 - 13 Feb 1994 Observers: Unknown Translation to ASPeCt data format: Vladimir Smirnov Summary of voyage track: 31/12 Ice edge at approx. 67S, 1W 31/12-1/1 Ice edge to SANAE (2W) 7-9/1 SANAE to Novolazarevskaya (12E) 11-15/1 Novolazarevskaya to Molodezhnaya (46E) 17-23/1 Molodezhnaya to Mirny (93E) 29-31/1 Mirny to Malygincev (100E) 2-10/2 Malygincev to McMurdo (168E) 11-13/2 McMurdo to ice edge at approx. 73S, 161W The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: Russia Vessel: Akademic Fedorov Dates in ice: 08 Mar 1992 - 21 Apr 1992 Observers: Unknown Translation to ASPeCt data format: Vladimir Smirnov Summary of voyage track: 23/3 Ice edge at approx. 67S, 45E 23/3 Arrive Molodezhnaya 27/3 - 1/4 Molodezhnaya to Mirny (mostly out of the ice) 3-5/4 Mirny to Oazis (approx. 100E) 6-8/4 Oazis to Mirny 10-15/4 Mirny to Molodezhnaya 17-20/4 Molodezhnaya to Novolazarevskaya 20-21/4 Novolazarevskaya to ice edge at approx. 67S, 13E The fields in this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS

Readme - Bathymetry Files Data for BROKE-WEST 2006 1) Zipped folder contains .csv files created from each acoustics ev file for Transects 1 to 11. 2) These files contain subsections of each transect of variable length (usually between 50 and 100 km). 3) No data exists for files; Transect01_01 and 01_02 as the sea floor was greater than 5000m deep in these areas and was below the range set for the sounder. 4) Each file contains 11 columns of data; Ping_date, Ping_time, Ping_milliseconds, Latitude, Longitude, Position_status, Depth, Line_Status, Ping_status, Altitude, GPS_UTC time. 5) For practical purposes, the columns of interest will be Ping_date, Ping_time, Latitude, Longitude and Depth. Other columns are ancillary acoustics information and can be ignored. Line status should be 1 (meaning good) as sea floor was only picked when it could be easily defined. If the sea floor could not be visually defined or was deemed to uncertain, it was not picked in the echogram. Hence sea floor may not be totally contiguous. 6) Depth of the sea floor was only defined for those areas deemed to be 'on transect', i.e. straight transects for acoustics survey purposes. Deviations from the transect, i.e. to pick up moorings, conduct target or routine trawls or visit nice looking bergs were deemed 'off transect' and were excluded from the analysis. 7) Sea floor depth was primarly defined for the purposes of the acoustics analysis, i.e. exclusion from the echograms. Hence the values in the files are for the 'sea floor exclusion line' that is set above the true sea floor in order to exclude noise from the analysis. This means the sea floor depths in these files are likely to be an underestimate of the true depth. The uncertainty is likely to be of the order of 2 to 10m. 8) Another source of error is that depth was calculated with values of absorption coefficient and sound speed set to default values derived from pre-cruise hydrographic data. One value for each parameter was applied to the whole data set. These values were; 0.028 dB/m (120 KhZ), 0.010 dB/m (38kHz), 0.041 dB/m (200 kHz), 0.0017 dB/m (12kHz - bathy sounder) for absorption coefficient and 1456 m/s for sound speed. 9) These values will be recalculated from the oceanographic data derived during the voyage and applied to the data set during post-processing (forthcoming analyses for May-June 2006). Revision of these parameters may cause a slight shift in the calculated depths, although this is likely to be small. 10) Reprocessing of the data may also result in more accurate bottom detection. This data should be available post June 2006 and will be sent to interested parties as soon as it is completed. 11) Dataset was created by Esmee van Wijk.

These data describe pack ice characteristics in the Antarctic sea ice zone. These data are in the ASPeCt format. National program: United States Vessel: Nathaniel B. Palmer Dates in ice: 27 Aug 1995 - 12 Sep 1995 Observers: Martin Jeffries, others Summary of voyage track: 27/8 Ice edge at approx. 67S, 110W 27-30/8 Transect south along 110W to approx. 70S 30/8 - 12/9 Zig zag transects eastward to ice edge at approx. 63S, 78W The fields for this dataset are: SEA ICE CONCENTRATION SEA ICE FLOE SIZE SEA ICE SNOW COVER SEA ICE THICKNESS SEA ICE TOPOGRAPHY SEA ICE TYPE RECORD DATE TIME LATITUDE LONGITUDE OPEN WATER TRACK SNOW THICKNESS SNOW TYPE SEA TEMPERATURE AIR TEMPERATURE WIND VELOCITY WIND DIRECTION FILM COUNTER FRAME COUNTER FOR FILM VIDEO RECORDER COUNTER VISIBILITY CODE CLOUD WEATHER CODE COMMENTS