Bester, Marthán Nieuwoudt; Oosthuizen, W Christiaan; Bornemann, Horst (2015): SEAFOS seal census survey at Filchner Trough during campaign FIL2014 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855258, In: Bester, MN et al. (2015): SEAFOS seal census survey at Filchner Outflow System during campaign FIL2014 [dataset publication series]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.855259
Always quote citation above when using data! You can download the citation in several formats below.
Related to:
Knust, Rainer; Schröder, Michael (2014): The Expedition PS82 of the Research Vessel POLARSTERN to the southern Weddell Sea in 2013/2014. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 680, 155 pp, https://doi.org/10.2312/BzPM_0680_2014
Coverage:
Median Latitude: -77.423253 * Median Longitude: -37.262289 * South-bound Latitude: -77.919501 * West-bound Longitude: -39.579503 * North-bound Latitude: -76.555687 * East-bound Longitude: -33.778126
Date/Time Start: 2014-01-13T13:40:12 * Date/Time End: 2014-01-17T15:19:08
Event(s):
SEAFOS_20140113_2 * Latitude Start: -77.033024 * Longitude Start: -33.778126 * Latitude End: -76.555687 * Longitude End: -36.821373 * Date/Time Start: 2014-01-13T13:40:12 * Date/Time End: 2014-01-13T14:28:21 * Location: Filchner Trough * Campaign: FIL2014 (PS82) * Basis: Polarstern * Method/Device: Helicopter (HELI) * Comment: Length of transect: 93.692 km; Target altitude of flight: 60 m
SEAFOS_20140113_3 * Latitude Start: -76.690188 * Longitude Start: -37.109784 * Latitude End: -77.186433 * Longitude End: -33.950741 * Date/Time Start: 2014-01-13T14:35:21 * Date/Time End: 2014-01-13T15:23:21 * Location: Filchner Trough * Campaign: FIL2014 (PS82) * Basis: Polarstern * Method/Device: Helicopter (HELI) * Comment: Length of transect: 96.596 km; Target altitude of flight: 60 m
SEAFOS_20140116_4 * Latitude Start: -77.916367 * Longitude Start: -38.223392 * Latitude End: -77.730691 * Longitude End: -39.579503 * Date/Time Start: 2014-01-16T13:51:55 * Date/Time End: 2014-01-16T14:10:55 * Location: Filchner Trough * Campaign: FIL2014 (PS82) * Basis: Polarstern * Method/Device: Helicopter (HELI) * Comment: Length of transect: 37.892 km; Target altitude of flight: 60 m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Bester, Marthán Nieuwoudt | |||
| 2 | DATE/TIME | Date/Time | Bester, Marthán Nieuwoudt | Geocode – Start of transect [GMT] | ||
| 3 | DATE/TIME | Date/Time | Bester, Marthán Nieuwoudt | Geocode – End of transect [GMT] | ||
| 4 | LATITUDE | Latitude | Bester, Marthán Nieuwoudt | Geocode – Transect start | ||
| 5 | LONGITUDE | Longitude | Bester, Marthán Nieuwoudt | Geocode – Transect start | ||
| 6 | LATITUDE | Latitude | Bester, Marthán Nieuwoudt | Geocode – Transect end | ||
| 7 | LONGITUDE | Longitude | Bester, Marthán Nieuwoudt | Geocode – Transect end | ||
| 8 | Area/locality | Area | Bester, Marthán Nieuwoudt | Stratum | ||
| 9 | Identification | ID | Bester, Marthán Nieuwoudt | Transect | ||
| 10 | Length | l | km | Bester, Marthán Nieuwoudt | Transect Length | |
| 11 | Flight altitude | Flight altitude | m | Bester, Marthán Nieuwoudt | Target Altitude | |
| 12 | Duration | Duration | Bester, Marthán Nieuwoudt | Transect effort time [hh:mm:ss] | ||
| 13 | Identification | ID | Bester, Marthán Nieuwoudt | Segment; Observers divided each transect into 3 minute segments, while conducting the survey. Each observation can be linked to a segment. Three environmental (ice) variables were also collected for each segment while in the air. | ||
| 14 | Sample code/label | Sample label | Bester, Marthán Nieuwoudt | Segment label; SEAFOS_yyyy/mm/dd_transect_segment | ||
| 15 | LATITUDE | Latitude | Bester, Marthán Nieuwoudt | Geocode – Segment start | ||
| 16 | LONGITUDE | Longitude | Bester, Marthán Nieuwoudt | Geocode – Segment start | ||
| 17 | LATITUDE | Latitude | Bester, Marthán Nieuwoudt | Geocode – Segment end | ||
| 18 | LONGITUDE | Longitude | Bester, Marthán Nieuwoudt | Geocode – Segment end | ||
| 19 | Length | l | km | Bester, Marthán Nieuwoudt | Segment effort | |
| 20 | Date/time start | Date/time start | Bester, Marthán Nieuwoudt | Segment start [GMT] | ||
| 21 | Date/time end | Date/time end | Bester, Marthán Nieuwoudt | Segment end [GMT] | ||
| 22 | Duration | Duration | Bester, Marthán Nieuwoudt | Time on effort (hh:mm:ss) per segment | ||
| 23 | Investigator | Investigator | Bester, Marthán Nieuwoudt | Observer | ||
| 24 | Side | Side | Bester, Marthán Nieuwoudt | Left or right side of the helicopter | ||
| 25 | Method comment | Method comm | Bester, Marthán Nieuwoudt | Distance sampling options; Horst Bornemann made all observations from the right of the aircraft. Only conventional distance sampling (CDS) is an option. Marthan Bester and Chris Oosthuizen were independent observers on the left of the aircraft. Their data may be analysed using mark-recapture distance sampling (MRDS). | ||
| 26 | Species | Species | Bester, Marthán Nieuwoudt | Lobodon carcinophaga or Leptonychotes weddellii or unidentified seal if no certain species identification could have been made or empty cell if no data are available | ||
| 27 | Number of individuals | Ind No | # | Bester, Marthán Nieuwoudt | Size group | |
| 28 | Interval comments | Interval comm | Bester, Marthán Nieuwoudt | Distance interval where the observation was made. Bin intervals: Left truncation at 35.2 m | ||
| 29 | Distance | Distance | m | Bester, Marthán Nieuwoudt | Mean detection distance; Distance to the centre of each bin | |
| 30 | Comment | Comment | Bester, Marthán Nieuwoudt | MRDS inconsistancies; Cases where Marthan Bester and Chris Oosthuizen reported different seal species observed (Crabeater / Weddell / Unidentified), or where the observations were not made in the same bin (but in adjacent bins); or where the size of the group counted differed. | ||
| 31 | Comment | Comment | Bester, Marthán Nieuwoudt | Object; Unique integer for each seal sighted. | ||
| 32 | Comment | Comment | Bester, Marthán Nieuwoudt | Unique records; Only one of the duplicate sightings (of Marthan Bester and Chris Oosthuizen) have a 1 | ||
| 33 | Time of day | Time of day | Bester, Marthán Nieuwoudt | Observation time [GMT] | ||
| 34 | LATITUDE | Latitude | Bester, Marthán Nieuwoudt | Geocode – Observation | ||
| 35 | LONGITUDE | Longitude | Bester, Marthán Nieuwoudt | Geocode – Observation | ||
| 36 | Ice floe size | Floe | Bester, Marthán Nieuwoudt | Subjective scoring of ice concentration while flying. Open water; Brash Ice (Wreckage of ice); Cake Ice <10 m; Small floes 10-100 m; Medium floes 100-500 m; Large floes >500 m | ||
| 37 | Ice type | Ice type | Bester, Marthán Nieuwoudt | Segment ice concentration | ||
| 38 | Ice type | Ice type | Bester, Marthán Nieuwoudt | Segment ice surface; Rough or smooth; occasionally empty cell is segment in only associated with open water. | ||
| 39 | Temperature, air | TTT | °C | Bester, Marthán Nieuwoudt | Transect air temperature | |
| 40 | Wind speed, true | WindSpTru | m/s | Bester, Marthán Nieuwoudt | Transect wind velocity | |
| 41 | Visibility | Visib | m | Bester, Marthán Nieuwoudt | Transect visibility | |
| 42 | Comment | Comment | Bester, Marthán Nieuwoudt |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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4685 data points
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