Data Description

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Schodlok, MP et al. (2006): (Table 1) Iceberg characteristics and start and end date and location of iceberg buoys in the Weddell Sea. Dataset #854974 (DOI registration in progress),
Supplement to: Schodlok, Michael P; Hellmer, Hartmut H; Rohardt, Gerd; Fahrbach, Eberhard (2006): Weddell Sea iceberg drift: Five years of observations. Journal of Geophysical Research, 111(C6), doi:10.1029/2004JC002661
The drift of 52 icebergs tagged with GPS buoys in the Weddell Sea since 1999 has been investigated with respect to prevalent drift tracks, sea ice/iceberg interaction, and freshwater fluxes. Buoys were deployed on small- to medium-sized icebergs (edge lengths ? 5 km) in the southwestern and eastern Weddell Sea. The basin-scale iceberg drift of this size class was established. In the western Weddell Sea, icebergs followed a northward course with little deviation and mean daily drift rates up to 9.5 ± 7.3 km/d. To the west of 40°W the drift of iceberg and sea ice was coherent. In the highly consolidated perennial sea ice cover of 95% the sea ice exerted a steering influence on the icebergs and was thus responsible for the coherence of the drift tracks. The northward drift of buoys to the east of 40°W was interrupted by large deviations due to the passage of low-pressure systems. Mean daily drift rates in this area were 11.5 ± 7.2 km/d. A lower threshold of 86% sea ice concentration for coherent sea ice/iceberg movement was determined by examining the sea ice concentration derived from Special Sensor Microwave Imager (SSM/I) and Advanced Microwave Scanning Radiometer for EOS (AMSR-E) satellite data. The length scale of coherent movement was estimated to be at least 200 km, about half the value found for the Arctic Ocean but twice as large as previously suggested. The freshwater fluxes estimated from three iceberg export scenarios deduced from the iceberg drift pattern were highly variable. Assuming a transit time in the Weddell Sea of 1 year, the iceberg meltwater input of 31 Gt which is about a third of the basal meltwater input from the Filchner Ronne Ice Shelf but spreads across the entire Weddell Sea. Iceberg meltwater export of 14.2 × 103 m3 s?1, if all icebergs are exported, is in the lower range of freshwater export by sea ice.
Median Latitude: -68.753118 * Median Longitude: -14.912294 * South-bound Latitude: -75.446000 * West-bound Longitude: -56.623000 * North-bound Latitude: -54.752000 * East-bound Longitude: 22.534000
Note: Two positions (ordinal number 7 and 51, parameters: latitude 2 and longitude 2) given by the authors seem to be wrong and are therefore labelled with a "?".
#NameShort NameUnitPrincipal InvestigatorMethodComment
1ORDINAL NUMBER *Ord NoSchodlok, Michael P *Geocode
2Identification *IDSchodlok, Michael P *
3Date/time start *Date/time startSchodlok, Michael P *date of deployment
4Record length *LengthmSchodlok, Michael P *
5Width *wmSchodlok, Michael P *
6Freeboard *FreeboardmSchodlok, Michael P *
7Freeboard *FreeboardmSchodlok, Michael P *min
8Freeboard *FreeboardmSchodlok, Michael P *max
9LATITUDE *LatitudeSchodlok, Michael P *Geocode
10LONGITUDE *LongitudeSchodlok, Michael P *Geocode
11Date/time end *Date/time endSchodlok, Michael P *last date of transmission
12Latitude 2 *Lat 2Schodlok, Michael P *
13Longitude 2 *Long 2Schodlok, Michael P *
422 data points

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