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Bester, Marthán N; Oosthuizen, W Christiaan; Bornemann, Horst (2015): SEAFOS seal census survey at Filchner Outflow during campaign FIL2014. PANGAEA, https://doi.org/10.1594/PANGAEA.855257, In: Bester, MN et al. (2015): SEAFOS seal census survey at Filchner Outflow System during campaign FIL2014. Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.855259

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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: -74.474986 * Median Longitude: -33.776069 * South-bound Latitude: -75.245956 * West-bound Longitude: -38.133617 * North-bound Latitude: -73.710831 * East-bound Longitude: -28.659994
Date/Time Start: 2014-01-04T13:21:13 * Date/Time End: 2014-02-09T14:42:54
Event(s):
SEAFOS_20140104_1 * Latitude Start: -75.245956 * Longitude Start: -28.811598 * Latitude End: -74.369644 * Longitude End: -28.650448 * Date/Time Start: 2014-01-04T13:21:13 * Date/Time End: 2014-01-04T14:11:29 * Location: Filchner Outflow * Campaign: FIL2014 * Device: Helicopter (HELI) * Comment: Length of transect: 97.489 km; Target altitude of flight: 60 m
SEAFOS_20140122_8 * Latitude Start: -74.354003 * Longitude Start: -29.327110 * Latitude End: -74.784569 * Longitude End: -29.550745 * Date/Time Start: 2014-01-22T13:55:30 * Date/Time End: 2014-01-22T14:19:40 * Location: Filchner Outflow * Campaign: FIL2014 * Device: Helicopter (HELI) * Comment: Length of transect: 48.299 km; Target altitude of flight: 60 m
SEAFOS_20140122_9 * Latitude Start: -74.806574 * Longitude Start: -28.734500 * Latitude End: -74.349787 * Longitude End: -28.663539 * Date/Time Start: 2014-01-22T14:28:18 * Date/Time End: 2014-01-22T14:55:20 * Location: Filchner Outflow * Campaign: FIL2014 * Device: Helicopter (HELI) * Comment: Length of transect: 50.801 km; Target altitude of flight: 60 m
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventBester, Marthán N
2DATE/TIMEDate/TimeBester, Marthán NGeocode – Start of transect [GMT]
3DATE/TIMEDate/TimeBester, Marthán NGeocode – End of transect [GMT]
4LATITUDELatitudeBester, Marthán NGeocode – Transect start
5LONGITUDELongitudeBester, Marthán NGeocode – Transect start
6LATITUDELatitudeBester, Marthán NGeocode – Transect end
7LONGITUDELongitudeBester, Marthán NGeocode – Transect end
8Area/localityAreaBester, Marthán NStratum
9IdentificationIDBester, Marthán NTransect
10LengthlkmBester, Marthán NTransect Length
11Flight altitudeAltitudemBester, Marthán NTarget Altitude
12DurationDurationBester, Marthán NTransect effort time [hh:mm:ss]
13IdentificationIDBester, Marthán NSegment; 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.
14Sample code/labelSample labelBester, Marthán NSegment label; SEAFOS_yyyy/mm/dd_transect_segment
15LATITUDELatitudeBester, Marthán NGeocode – Segment start
16LONGITUDELongitudeBester, Marthán NGeocode – Segment start
17LATITUDELatitudeBester, Marthán NGeocode – Segment end
18LONGITUDELongitudeBester, Marthán NGeocode – Segment end
19LengthlkmBester, Marthán NSegment effort
20Date/time startDate/time startBester, Marthán NSegment start [GMT]
21Date/time endDate/time endBester, Marthán NSegment end [GMT]
22DurationDurationBester, Marthán NTime on effort (hh:mm:ss) per segment
23InvestigatorInvestigatorBester, Marthán NObserver
24SideSideBester, Marthán NLeft or right side of the helicopter
25Method commentMethod commBester, Marthán NDistance 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).
26SpeciesSpeciesBester, Marthán NLobodon carcinophaga or Leptonychotes weddellii or unidentified seal if no certain species identification could have been made or empty cell if no data are available
27Number of individualsInd No#Bester, Marthán NSize group
28Interval commentsInterval commBester, Marthán NDistance interval where the observation was made. Bin intervals: Left truncation at 35.2 m
29DistanceDistancemBester, Marthán NMean detection distance; Distance to the centre of each bin
30CommentCommentBester, Marthán NMRDS 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.
31CommentCommentBester, Marthán NObject; Unique integer for each seal sighted.
32CommentCommentBester, Marthán NUnique records; Only one of the duplicate sightings (of Marthan Bester and Chris Oosthuizen) have a 1
33Time of dayTime of dayBester, Marthán NObservation time [GMT]
34LATITUDELatitudeBester, Marthán NGeocode – Observation
35LONGITUDELongitudeBester, Marthán NGeocode – Observation
36Ice floe sizeFloeBester, Marthán NSubjective 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
37Ice typeIce typeBester, Marthán NSegment ice concentration
38Ice typeIce typeBester, Marthán NSegment ice surface; Rough or smooth; occasionally empty cell is segment in only associated with open water.
39Temperature, airTTT°CBester, Marthán NTransect air temperature
40Wind speed, trueWindSpTrum/sBester, Marthán NTransect wind velocity
41VisibilityVisibmBester, Marthán NTransect visibility
42CommentCommentBester, Marthán N
Size:
37616 data points

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