Source ID AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd AWI-Grnlnd
Platform ID uls26-91-92 uls31-92 uls32-93-94 uls49-94-95 uls32-97-98 uls47-98-99 uls25-99-00 uls32-99-00 uls48-00-01 uls31-00-01 uls47-01-02
Project Name AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data AWI Moored ULS Data
Region/location Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea Greenland Sea
Institution Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute Alfred Wegener Institute
Investigators H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach H. Witte and E. Fahrbach
Contact and email Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de Dr Wolfgang Dierking    Wolgang.Dierking@awi.de
Project web site nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html nsidc.org/data/docs/noaa/g02139_aws_moored_uls_data/index.html
Documentation files AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002.pdf
Method ULS ULS ULS ULS ULS ULS ULS ULS ULS ULS ULS
Draft, freeboard, or thickness draft draft draft draft draft draft draft draft draft draft draft
Instrument model and maker Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory Applied Phyics Laboratory
Instrument Serial Number APL26 APL31 APL32 APL49 APL32 APL47 APL25 APL32 APL48 APL31 APL47
Point Data location
Point Data files
Header files
Latitude maximum 75 74.882 74.878 74.962 79.008 79.003 78.996 74.408 79.025 74.407 74.409
Latitude minimum 75 74.882 74.878 74.962 79.008 79.003 78.996 74.408 79.025 74.407 74.409
Longitude maximum -12.5 -11.717 -7.628 -12.978 -2.042 -2.043 -2.055 -10.25 -2.026 -10.203 -10.203
Longitude minimum -12.5 -11.717 -7.628 -12.978 -2.042 -2.043 -2.055 -10.25 -2.026 -10.203 -10.203
Start date Aug-91 Aug-92 Aug-93 Jul-94 Aug-97 Sep-98 Sep-99 Oct-99 Aug-00 Sep-00 Sep-01
Start year 1991 1992 1993 1994 1997 1998 1999 1999 2000 2000 2001
Start day 230 236 239 202 244 252 264 280 227 262 263
Stop date Nov-92 Dec-92 Jul-94 Oct-95 Sep-98 Sep-99 Aug-00 Sep-00 Oct-01 Sep-01 Sep-02
Stop year 1992 1992 1994 1995 1998 1999 2000 2000 2001 2001 2002
Stop day 313 366 204 284 250 261 219 259 301 260 267
Total number of point samples 107634 35657 93797 104353 103233 106319 89886 96782 122890 104589 99051
Total number of PDF's and averages 16 5 12 15 13 13 12 12 15 13 13
PDF nbins 300 300 300 300 300 300 300 300 300 300 300
PDF bin width 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100
PDF first center 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
PDF sample intervals 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min
 
Mooring specific information
Mooring name AWI411 AWI412-2 AWI414-2 AWI410-2 V10-1 V10-2 V10-3 AWI419-1 F10-4 AWI419-2 AWI419-3
Mooring depth 1002m 2362m 3425m 413m 2600m 2609m 2582m 3229m 2554m 3160m 3160m
Instrument depth 48m 50m 70m 73m 58m 54m 53m 63m 67m 65m 82m
ADCP
Pseudo-spatial sampling No No No No No No No No No No No
Ping frequency (hz) 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width 300 kHz, 1 ms width
Ping beam width
Ping interval  5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min 5 min
 
Processing Notes Data were processed and calibrated by AWI. Statistical summaries were computed and reformatted by R. Lindsay, PSC from the 5-minute point data. 
Dr. Dierking notes one problem with the data sets available at NSIDC is that a bias factor was applied to account for the width of the sonar beam. However, only sort of an average value was used that was based on a limited comparison of ice thickness values derived from ULS and obtained from drilling. Since we think that sucha value is not generally valid we decided not to include such a bias correction in our future data sets, leaving the choice of handling this problem to the end-user. 
The map in the NSIDC documentation appears to be wrong.