README FILE FOR CBL XBT DATA 1st June 2006 Rebecca Woodgate, UW Funded by NSF-ANS OPP-0117480 ================================================================ 1234567890123456789012345678901234567890123456789012345678901234567890 This is an archive of data of 47 distinct XBT casts taken at 41 locations in the Mendeleev Ridge and Chukchi Borderland region of the Arctic between 22nd August and 22nd September 2002, from the from the USCGC Polar Star (cruise CBL2002, also called AWS-02-II) as part of an NSF sponsored project. ------------------------------------------------------- For science overview, (and links to articles, including on line access to cruise report) please see: http://psc.apl.washington.edu/CBL.html For queries, please contact: Dr Rebecca A Woodgate Applied Physics Laboratory Tel: (206)-221-3268 University of Washington Fax: (206)-616-3142 1013 NE 40th Street, Seattle Email: woodgate@apl.washington.edu Washington 98105-6698, U.S.A. http://psc.apl.washington.edu/HLD ===================================================================== Meta data ========== 1) Platform: XBT casts made from the USCGC Polar Star during the CBL2002 cruise. 2) Project title: The Influence of the Mendeleev Ridge and Chukchi Borderland on the Large-scale Circulation of the Arctic Ocean. (Short title:The Chukchi Borderland (CBL) Arctic Crossroads) 3) Data collection dates: August 2002 to September 2002 4) PIs: Rebecca Woodgate (woodgate@apl.washington.edu) Knut Aagaard (aagaard@apl.washington.edu) Jim Swift (jswift@ucsd.edu) Bill Smethie (bsmeth@ldeo.columbia.edu) Kelly Falkner (kfalkner@coas.oregonstate.edu) 5) Data collection method: manual XBT casts, using Sippican Deep Blue XBTs 6) Data calibration method: Data calibration based on manufacturer's specs. 7) Instrumentation used: Sippican Deep Blue XBTs 8) Quality control procedures: Only preliminary QC performed. Multiple casts were thrown at one location when the earlier profile was bad, i.e. xxx08, xbt08 xbt14, xbt15 xbt18,xbt19,xbt20 xbt21,xbt22 xbt23,xbt24 In these cases, the final number in the list is the most complete cast. 9) Data format: Ascii data files, one file per cast. Each file gives - a first line with file name and position, commented with % - header from the original file, commented with % - depth (m), temperature (deg C) pairs Two different XBT machines were used 1) cblxbt01-32 and 43-46 used the older machine in the MetLab - in these files, the first position given is the most accurate (the position in the XBT header is the time of loading, not the time of firing) 2) cblxbt33-42 used the newer machine in the aft wetlab - in these files, both positions should agree, the XBT header position is the most accurate, as it is read from the ship's GPS automatically at the time of firing. For ease of use, the two formats are combined into a common, ascii format. The full list of original file names and positions are : % % Lat Long filename orig name sndg/m depth/m 75 51.8 N 168 24.9 W cblxbt01.dat XBT089.DAT 290 289 75 58.9 N 168 39.4 W cblxbt02.dat XBT090.DAT 496 489 76 02.0 N 168 39.7 W cblxbt03.dat XBT091.DAT 818 803 76 03.8 N 168 56.3 W cblxbt04.dat XBT092.DAT 1254 1228 76 06.8 N 168 59.8 W cblxbt05.dat XBT093.DAT 1567 1535 76 10.2 N 169 10.4 W cblxbt06.dat XBT094.DAT 1888 1851 76 18.9 N 169 32.7 W cblxbt07.dat XBT095.DAT 2172 2131 76 24.4 N 175 39.7 E cblxxx08.dat XBT096.DAT 540 532 76 24.4 N 175 39.7 E cblxbt08.dat XBT097.DAT 540 532 76 31.8 N 176 06.3 E cblxbt09.dat XBT098.DAT 846 830 76 42.1 N 176 26.0 E cblxbt10.dat XBT099.DAT 1107 1085 77 10.9 N 177 03.0 E cblxbt11.dat XBT100.DAT 1231 1207 77 24.5 N 177 40.7 E cblxbt12.dat XBT101.DAT 1015 995 77 45.2 N 177 56.9 E cblxbt13.dat XBT102.DAT 1253 1227 78 16.0 N 176 47.7 E cblxbt14.dat XBT103.DAT 1874 1838 78 16.4 N 176 47.0 E cblxbt15.dat XBT104.DAT 1871 1835 78 50.9 N 175 31.5 E cblxbt16.dat XBT105.DAT 2195 2154 79 06.2 N 174 39.9 E cblxbt17.dat XBT106.DAT 2440 2396 78 30.5 N 164 40.3 W cblxbt18.dat XBT107.DAT 695 683 78 31.2 N 164 38.9 W cblxbt19.dat XBT108.DAT 695 683 78 31.5 N 164 38.0 W cblxbt20.dat XBT109.DAT 695 683 78 46.3 N 164 00.2 W cblxbt21.dat XBT110.DAT 952 932 78 46.7 N 163 59.9 W cblxbt22.dat XBT111.DAT 964 944 79 05.0 N 157 35.8 W cblxbt23.dat XBT112.DAT 3407 3353 79 05.0 N 157 34.9 W cblxbt24.dat XBT113.DAT 3467 3413 78 59.5 N 157 24.4 W cblxbt25.dat XBT114.DAT 3265 3212 78 48.1 N 156 51.2 W cblxbt26.dat XBT115.DAT 3863 3804 78 40.2 N 156 22.7 W cblxbt27.dat XBT116.DAT 3865 3806 77 19.5 N 163 47.5 W cblxbt28.dat XBT117.DAT 352 348 77 16.9 N 165 38.5 W cblxbt29.dat XBT118.DAT 928 908 77 08.0 N 167 07.5 W cblxbt30.dat XBT119.DAT 585 577 75 22.0 N 163 48.6 W cblxbt31.dat XBT120.DAT 1823 1787 75 18.1 N 164 44.4 W cblxbt32.dat XBT121.DAT 628 617 75 14.8 N 166 02.1 W cblxbt33.dat TD_00122.EDF 507 500 75 11.7 N 167 19.8 W cblxbt34.dat TD_00124.EDF 193 195 75 12.5 N 168 37.7 W cblxbt35.dat TD_00125.EDF 198 200 75 25.5 N 169 41.4 W cblxbt36.dat TD_00126.EDF 431 427 75 34.3 N 170 38.1 W cblxbt37.dat TD_00127.EDF 1398 1369 75 38.6 N 171 10.6 W cblxbt38.dat TD_00129.EDF 1580 1548 74 56.4 N 168 08.0 W cblxbt39.dat TD_00130.EDF 162 164 74 46.2 N 167 36.0 W cblxbt40.dat TD_00131.EDF 303 301 74 36.1 N 167 05.9 W cblxbt41.dat TD_00133.EDF 365 361 74 26.1 N 166 34.6 W cblxbt42.dat TD_00134.EDF 313 311 74 03.7 N 165 28.0 W cblxbt43.dat XBT122.DAT 193 195 73 55.9 N 165 03.7 W cblxbt44.dat XBT123.DAT 173 175 73 45.9 N 164 33.6 W cblxbt45.dat XBT124.DAT 170 172 73 36.3 N 164 04.3 W cblxbt46.dat XBT125.DAT 147 149 The Soundings are from a hull mounted Knudsen echosounder. The corrected depth is computed using a depth dependent speed of sound from AOS94 data and corrected to full water depth by adding the transducer depth of 9m. For dates and times, please see the cruise report, CBL2002cruisereport.pdf and CBL2002cruiseappendices.pdf, also available at http://psc.apl.washington.edu/CBL.html 10) Data collection problems: See notes above about position. Depth information is based on manufacturer's assumed fall rate, and should be checked against CTD casts. 11) Other related data sets: CBL2002 CTD and Bottle data set - set of 126 CTD-O casts with L-ADCP, with water sampling for salinity, oxygen, nutrients, CFCs, O18, Ba, He, I-129, Cs-137 (contact: Rebecca Woodgate or Jim Swift) 12) Conditions for use or citation: Data freely available Please, as a courtesy, contact the PIs before using these data 13) Data qualifications or warnings: Standard Sippican Deep Blue limitations apply. Estimated accuracy:- - for temperature = 0.1 deg C - for depth = the greater of ~ 5m or 2% of depth 14) Grant numbers: NSF: Arctic Natural Sciences OPP-0117480 15) Sample repository locations: Not applicable ================================================================= FILE LISTING ============= - 47 data files - 1 readme file (this file) - 2 cruise report files Name Size/bytes CBL2002XBT.readme.txt 7945 CBL2002cruiseappendices.pdf 3966282 CBL2002cruisereport.pdf 1219418 cblxbt01.dat 113736 cblxbt02.dat 113736 cblxbt03.dat 113908 cblxbt04.dat 113736 cblxbt05.dat 113736 cblxbt06.dat 113908 cblxbt07.dat 113736 cblxbt08.dat 113908 cblxbt09.dat 113736 cblxbt10.dat 113736 cblxbt11.dat 113736 cblxbt12.dat 113908 cblxbt13.dat 101008 cblxbt14.dat 47774 cblxbt15.dat 84238 cblxbt16.dat 113736 cblxbt17.dat 113650 cblxbt18.dat 69790 cblxbt19.dat 7010 cblxbt20.dat 113650 cblxbt21.dat 110124 cblxbt22.dat 109350 cblxbt23.dat 113908 cblxbt24.dat 113650 cblxbt25.dat 113650 cblxbt26.dat 113650 cblxbt27.dat 113650 cblxbt28.dat 69016 cblxbt29.dat 113908 cblxbt30.dat 113736 cblxbt31.dat 113736 cblxbt32.dat 113736 cblxbt33.dat 19436 cblxbt34.dat 19436 cblxbt35.dat 19436 cblxbt36.dat 19436 cblxbt37.dat 19436 cblxbt38.dat 19436 cblxbt39.dat 19436 cblxbt40.dat 19436 cblxbt41.dat 19436 cblxbt42.dat 19436 cblxbt43.dat 113650 cblxbt44.dat 113736 cblxbt45.dat 88796 cblxbt46.dat 69016 cblxxx08.dat 33498 =================================================================