Last update 03 December 2010 ACCLAIM DEEP OCEAN BOTTOM PRESSURE RECORDER (BPR) STATIONS ========================================================== File format (FF) A indicates ACCLAIM Format (with 11 columns, and a 4 digit year - see http://www.pol.ac.uk/ntslf/acclaimdata/readme.formats). Note that these are DEEP SEA pressure records, not from coastal pressure sensors, so station names like 'Amsterdam' are just convenient labels. Also depths shown are approximate only. The 'IAPSO' column shows the codes used for these records within the IAPSO Pelagic Tidal Constants data set. Indian Ocean ============ Station Lat Long Depth Start End FF Filename IAPSO Amsterdam 37 54.10S 77 34.16E 310m 26-Jul-84 15-Feb-85 A amsterdam.8485 3.2.9 Amsterdam 37 54.10S 77 37.16E 178m 20-Mar-86 22-Dec-86 A amsterdam.8686 3.2.10 Amsterdam 37 54.10S 77 37.16E 165m 23-Dec-86 21-Dec-87 A amsterdam.8687 3.2.11 Amsterdam 37 54.10S 77 37.16E 180m 22-Dec-87 19-Dec-88 A amsterdam.8788 3.2.12 Amsterdam 37 54.00S 77 35.00E 470m 20-Mar-86 21-Dec-87 A amsterdam.deep.8687 3.2.17 Amsterdam 37 54.00S 77 35.00E 460m 23-Dec-87 19-Dec-88 A amsterdam.deep.8788 3.2.18 Amsterdam 37 54.26S 77 34.83E 350m 11-May-91 31-Jan-92 A amsterdam.9192 - Amsterdam 37 53.00S 77 35.00E 350m 01-May-92 11-Jul-93 A amsterdam.9293 - Amsterdam 37 54.20S 77 34.72E 350m 11-Jul-93 23-Oct-94 A amsterdam.9394 - Amsterdam 37 54.19S 77 34.71E 350m 24-Oct-94 30-Nov-95 Contact POL - Kerguelen 48 51.50S 70 10.00E 105m 27-Feb-86 17-Dec-86 A kerguelen.8686 3.2.13 Kerguelen 48 51.50S 70 10.00E 106m 18-Dec-86 18-Dec-87 A kerguelen.8687 3.2.14 Kerguelen 48 51.50S 70 10.00E 106m 18-Dec-87 15-Dec-88 A kerguelen.8788 3.2.15 Kerguelen 48 51.60S 70 10.80E 103m 16-Dec-88 31-Dec-89 A kerguelen.8889 - Kerguelen 47 39.60S 69 21.69E 185m 06-Jul-93 20-Oct-94 A kerguelen.9394 - ID2 28 19.18S 66 49.68E 3650m Aug-84 Feb-85 A id2.8485 3.2.16 Crozet 46 23.95S 51 56.52E 160m 30-Jun-93 09-Oct-94 A crozet.9394 - CK2 46 52.26S 52 28.29E 3600m 09-Mar-93 03-Mar-94 A ck2.9394 3.2.19/20/21 IO1 47 07.00S 54 54.05E 3944m 23-Jan-04 17-Feb-05 A IO1_2004-5_ch2+4.df4 - IO2 48 49.90S 61 16.78E 3925m 24-Jan-04 31-Jan-05 A IO2_2004-5_ch2+4.df4 - Equatorial and South Atlantic ============================= Station Lat Long Depth Start End FF Filename IAPSO FP1 00 00 N 20 01 W 2700m Feb-83 Sep-84 A fp1.8384 1.3.16 FP3 (=IAPSO 1.3.17) on Atlantic equator to be added FP4 (=IAPSO 1.3.18) .. .. .. Tristan-A 35 31.00S 11 02.00W 4080m 06-Nov-85 03-Oct-86 A tdca1.data-d 1.4.14/15/16 Tristan-A 35 31.00S 11 02.00W 4082m 04-Oct-86 26-Sep-87 A tdca2.data-d 1.4.17/18 Tristan-A 35 32.00S 11 00.00W 4090m 27-Sep-87 08-Oct-88 A tdca3.data-d 1.4.19 Tristan-B 37 00.00S 14 29.00W 3505m 02-Oct-86 25-Sep-87 A tdcb2.data-d 1.4.20/21/22 Tristan-C 38 31.00S 11 09.00W 3435m 02-Nov-85 30-Sep-86 A tdcc1.data-d 1.4.23/24/25 Tristan-C 38 31.00S 11 09.00W 3120m 21-Oct-86 24-Sep-87 A tdcc2.data-d 1.4/26/27/28 Tristan-H3 37 11.06S 07 46.16W 1600m 08-Jan-98 21-Jan-98 A tdcch3.acc - Marfrio 31 59.9 S 36 00.7 W 2604m 1-May-95 5-May-96 A marfrio.4p - (data exist after May 96, see below) PAVASAS 0 13.96N 41 12.62W 104m 23-Jul-87 29-Aug-87 A pavasas_2.dat - MOVE-A 16 20.85N 60 29.78W 4939m 24-Jan-02 26-Jun-03 A move_2002-3.acc-d - MOVE-B 16 22.29N 60 30.32W 4903m 29-Jul-03 01-Mar-04 A move_2003-4.acc-d - GRACE-2 44 25.20S 40 22.19W 5114m 16-May-02 16-May-03 A grace2_2002-3.acc-d - GRACE-3 43 11.9 S 45 18.1 W 5141m 16-May-02 17-May-03 A grace3_2002-3.acc-d - Drake Passage/Scotia Sea ======================== Station Lat Long Depth Start End FF Filename IAPSO FS1 53 32.39S 57 00.90W 2803m 27-Nov-88 11-Nov-89 A fs1.8889.acc 1.4.5/6/7 FS1 53 32.39S 57 01.89W 2800m 11-Nov-89 21-Nov-90 A fs1.8990.acc 1.4.8/9/10 FS1 53 30.70S 56 58.80W 2800m 21-Nov-90 09-Jan-92 A fs1.9092.acc 1.4.11/12/13 FS1 53 31.40S 57 01.90W 2800m 12-Jan-92 15-Nov-92 A fs1.9292.acc - FS2 56 41.97S 52 32.26W 3150m 28-Nov-88 12-Nov-89 A fs2.8889.acc 4.2.8/9/10 FS2 56 39.93S 52 28.55W 2861m 12-Nov-89 23-Nov-90 A fs2.8990.acc 4.2.11/12/13 FS3 60 02.23S 47 05.99W 2180m 14-Nov-89 24-Nov-90 A fs3.8990.acc 4.2.14/15/16 FS3 60 03.10S 47 05.10W 2010m 23-Nov-90 07-Jan-92 A fs3.9092.acc 4.2.17/18/19 FS3 60 03.10S 47 10.00W 2267m 07-Jan-92 23-Nov-92 A fs3.9292.acc - ND1 56 29.45S 62 59.13W 3925m 22-Dec-91 06-Nov-92 A nd1.9192 4.2.21 SD1 61 28.43S 61 17.43W 3946m 23-Dec-91 07-Nov-92 A sd1.9192 4.2.24 December 1996 Drake Passage Recoveries (North to South) ====================================== NNS 56 50.15S 57 30.09W 2096m 26-Nov-95 17-Nov-96 A dpnns956.i4d - CD 58 21.76S 56 21.28W 3776m 19-Nov-94 18-Nov-96 A dpc9496a.i4d - December 1998 Drake Passage Recoveries (North to South) ======================================================= CD 58 22.07S 56 21.47W 3880m 03-Jan-98 24-Nov-98 A dpc9798.acc - December 1999 Drake Passage Recoveries (North to South) ======================================================= CD 58 22.25S 56 21.20W 3776m 24-Nov-98 12-Nov-99 A dpc9899.acc - December 2000 Drake Passage Recoveries (North to South) ======================================================= CD 58 22.21S 56 21.15W 3862m 12-Nov-99 26-Nov-00 A dpc9900.acc - November 2004 Shagex Recoveries ============================================== SHAGEX1 53 04.86S 47 06.12W 1504m 25-May-2003 17-Nov-2004 A shagex1_0304.acc - SHAGEX2 53 23.21S 49 31.82W 1510m 25-May-2003 28-Nov-2004 A shagex1_0304.acc - February 1999: ROPEX Deployments and Recoveries. ================================================ CH1 59 52.046S 30 06.044W 2823m 18-Jan-1998 08-Apr-1999 A weddell_ch1.acc CH2 73 41.523S 34 36.954W 2826m 21-Jan-1998 17-Feb-1999 A weddell_ch2.acc MS2 76 35.09 S 32 0.4 W 389m 10-Feb-1998 21-Feb-1999 A weddell_ms2.acc BRIEF DOCUMENTATION FOR BPR STATIONS ==================================== Unless stated otherwise, records in this directory were obtained from deployments by the Proudman Oceanographic Laboratory. Also, unless stated otherwise, the datum of each record in each file from the same station (e.g. Amsterdam) should be regarded as being different as it is impossible to deploy a pop-up sensor at exactly the same location. In addition, consideration should be given to the fact that all pressure sensors, especially those at great depths, can be subject to long term drift. Station Amsterdam (files amsterdam.*) ================= This station was occupied by BPR's from POL during 1984-88 and from the University of Grenoble, France during 1991-94. POL instrumentation 1984-85 was strain gauge pressure sensor with temperature also recorded. For 1986-1988, a Paroscientific Digiquartz pressure transducer was used with temperature also recorded. As stated above, the datum of the pressure measurements is not maintained from one deployment to the next. See Vassie et al., Journal of Geophysical Research, 99(C1), 937-949, 1994. For each POL record a long term instrumental drift has been removed. Station positions (lat, lon) for the southern Indian Ocean should be regarded as being uncertain to 1 km (or 1 minute) in these pre-GPS days - if this is an important factor then notes of the scientists in charge can be consulted as to SATNAV etc. information. file amsterdam.8485: this file is in 11 column ACCLAIM format with three data channels: sea temperature (deg C), pressure (millibar) and non-tide residual pressure (millibar) after a tidal analysis. The third channel may be disregarded. The pressure time series is essentially flat over most of its length but with a drop of approximately 20 mbar between days 210 and 240 (August 1984). From comparisons with a second pressure sensor on the rig, which malfunctioned at day 271, we believe the rapid fall is an instrumental effect of the strain gauge. See Vassie et al., Journal of Geophysical Research, 99(C1), 937-949, 1994. files amsterdam.8686, amsterdam.8687 and amsterdam.8788: these files are in 11 column ACCLAIM format with one data channel: pressure (millibar). Data for 2-8 February 1987 were missing and were interpolated using tidal predictions. Also scans flagged as 'questionable data' data for 8-9 Feb. files amsterdam.deep.8687 and amsterdam.deep.8788: these files are in 11 column ACCLAIM format with total pressure in channel 8 in mbar. These deployments were at a greater depth than the previous ones. See Vassie et al., Journal of Geophysical Research, 99(C1), 937-949. For the records for 1991 onwards, obtained from colleagues at the University of Grenoble, files are in 11 column ACCLAIM format with a single data channel of pressure in millibar. No attempt has been made to remove possible long-term drifts in these pressure measurements. ========================================================================== Station Kerguelen (files kerguelen.*) ================= This station was occupied by BPR's from POL during 1986-88 and from the University of Grenoble, France thereafter. POL instrumentation consisted of Paroscientific Digiquartz pressure transducers, with long term instrumental drift removed from each of the records. As with data from Amsterdam and elsewhere, the datum of the pressure measurements is not maintained from one deployment to the next. See Vassie et al., Journal of Geophysical Research, 99(C1), 937-949, 1994. file kerguelen.8686: this file is in 11 column ACCLAIM format with two data channels: total pressure (millibar) and residual pressure (millibar) after a tidal analysis. This second channel may be ignored. files kerguelen.8687 and kerguelen.8788: these files are in 11 column ACCLAIM format with one data channel: total pressure in (millibar). For the records for 1988 onwards, obtained from colleagues at the University of Grenoble, files are in 11 column ACCLAIM format with a single data channel of pressure in millibar. No attempt has been made to remove possible long-term drifts in these pressure measurements. ========================================================================== Station ID2 (file id2.8485) =========== This station was a early POL deployment near to the 'triple point' of the Indian Ocean ridge. This file is in 11 column ACCLAIM format with total pressure (mbar) in channel 8. ========================================================================== Station Crozet (file crozet.9394) ============== This record was contributed to 11 column ACCLAIM by colleagues from the University of Grenoble, France and covers June 1993 - October 1994. No attempt has been made to remove possible long-term drifts in the pressure measurements. File is in 11 column ACCLAIM format with units of millibars for a single sensor. ========================================================================= Station CK2 (file ck2.9394) =========== CK2 was station number 2 on the west side of the 'Crozet-Kerguelen line' during a POL Indian Ocean cruise during March 93 - March 94. This file has instrumental drift removed and is in 11 column ACCLAIM format. Three pressure sensors were used: one Quartztronic (column 6 of file) which is very temperature sensitive; and two Digiquartz (columns 8 and 10) with their own temperature measurements (columns 7 and 9 respectively) which should be acceptable. Units in each channel: 6 (mbar), 7 (deg C), 8 (mbar), 9 (deg C), 10 (mbar) ========================================================================= Station IO1 =========== file IO1_2004-5_ch2+4.df4: File is in 11 column ACCLAIM format. Temperature in deg C * 100 is in columns 6, 8, while pressures in mbars above 402 bars are in columns 7 and 9. Residual pressure after harmonic analysis in columns 10 & 11 Apparent counter error (scans 1-2835) for column 8 (temperature) adjusted by addition of 414 to count before calibration. Instrumental drift removed on all pressures (columns 7 & 9). The file was QC'ed by David Blackman. ========================================================================= Station IO2 =========== file IO2_2004-5_ch2+4.df4: File is in 11 column ACCLAIM format. Temperature in deg C * 100 is in columns 6, 8, while pressures in mbars above 401 bars are in columns 7 and 9. Residual pressure after harmonic analysis in columns 10 & 11 Last scan not known - batteries dead so interval asssumed 900 seconds. Instrumental drift removed on all pressures (columns 7 & 9). The file was QC'ed by David Blackman. ========================================================================= Station FP1 (file fp1.8384) =========== This file is in 11 column ACCLAIM format with total pressure (mbar) in channel 9 obtained from a Digiquartz sensor. (Another total pressure measurement is in channel 8 but that is noisy). Temperature is in channel 7 (deg C). The file contains merged data from two separate deployments at almost the same position - see Cartwright et al., Journal of Geophysical Research, 92(C1), 725-741, 1987 for details. The deployment was one of several made on the Atlantic equator as part of the FOCAL experiment. ======================================================================== Stations Tristan-A, -B and -C ============================= These files are from POL's 'Tristan Triangle Experiment' around Tristan da Cunha which consisted of a series of BPR measurements made in a 'triangle' (sites A,B,C) around the island between 1985-88, for details see Spencer, R., Foden, P.R., McGarry, C., Harrison, A.J., Vassie, J.M., Baker, T.F., Smithson, M.J., Harangozo, S.A. and Woodworth, P.L. 1993. The ACCLAIM programme in the South Atlantic and Southern Oceans. International Hydrographic Review, 70, 7-21. Bottom pressure at all three sites was found to be very coherent, for example see Hughes, C.W. and Smithson, M.J. 1996. Bottom pressure correlations in the south Atlantic. Geophysical Research Letters, 23(17), 2243-2246. Files are in 11 column ACCLAIM format. For each one the Digiquartz transducer channels are the most quiet i.e. tdca1.data-d use channels 10 .. a2 .. 9 .. a3 .. 8/9 .. b2 .. 8/10 .. c1 .. 8/10 .. c2 .. 9/10 The -d in the filename indicates that long term drift has been removed from each pressure channel. Station Tristan H3 ================== file tdcch3.acc: This file has instrumental drift and mean removed and is in 7 column ACCLAIM format. Temperature in deg C *100 is in column 6, while pressure in mbars is in column 7. ========================================================================= Station MARFRIO =============== The Marfrio Mk4 BPR was deployed by the James Clark Ross (Karen Heywood's cruise) and was recovered by Bob Spencer, Afranio de Mesquita and Carlos Franca on board the Marfrio fishing boat in early 1997. The deployment was a collaboration between POL and the Instituto Oceanografico of the University of Sao Paulo. Data are in 11 column ACCLAIM format and good data exist for May 1995 to May 1996 in channels: Channel 6 QT3 (temperature deg C) 7 DQ35126 (pressure mbar) two digiquartz sensors used 8 DQ41083 (pressure mbar) .. .. .. .. 1st valid scan = Record No 25 Last valid scan = Record No 35472 Pressure data exists after record 35472 but it looks like the batteries began to run out. This data has been left in, in case someone may wish to try and extract something from it - and because the temperature data is OK. If you are interested in harmonic analysis, or the residual (non-tidal) signal, you are strongly recommended to use only the record between scans 25 and 35472. A summary of the harmonic analysis results are given below: Harmonic analysis results from Column 7 of marfrio.4p, using scans 25 to 35472, and the full (63) set of constituents. MAJOR CONSTITUENTS NSIG= 63 ------------------ NO NAME SPEED H G -- ---- ----- --- --- 1 ZO 0.0000000 7488.9150 0.000 9 Q1 13.3986609 1.9905 88.465 11 O1 13.9430356 7.0448 116.063 16 P1 14.9589314 1.5661 169.945 18 K1 15.0410686 4.6018 180.234 29 N2 28.4397295 3.7363 255.721 32 M2 28.9841042 10.6739 222.229 37 S2 30.0000000 4.3542 208.045 39 K2 30.0821373 1.4070 191.715 44 M3 43.4761563 0.0947 285.231 Harmonic analysis results from Column 8 of marfrio.4p, using scans 25 to 35472, and the full (63) set of constituents. MAJOR CONSTITUENTS NSIG= 63 ------------------ NO NAME SPEED H G -- ---- ----- --- --- 1 ZO 0.0000000 7256.7832 0.000 9 Q1 13.3986609 2.0202 88.689 11 O1 13.9430356 7.0140 116.188 16 P1 14.9589314 1.5685 171.012 18 K1 15.0410686 4.5673 180.483 29 N2 28.4397295 3.7534 255.505 32 M2 28.9841042 10.6358 221.802 37 S2 30.0000000 4.3363 207.903 39 K2 30.0821373 1.4122 191.392 44 M3 43.4761563 0.0900 285.902 These results were obtained using TIRA. The temperature channel has a much longer series. Contact POL if you are interested in having this. ========================================================================= Station PAVASAS =============== This record stems from a short deployment of a POL 'Mark 1' BPR by the Instituto Oceanografico of the University of Sao Paulo in 1987. PAVASAS stands for 'Pontos Anfidromicos e Variacoes Sazonais no Atlantico Sul (Amphidromic Points and Seasonal Variations in the South Atlantic)' which is the IOUSP research project. The deployment was in 104m water on the Brazilian shelf. Data are in 11 column ACCLAIM format in channels: Channel 6 Pressure (mbar) from a strain gauge sensor Channel 7 Pressure (mbar) from a digiquartz sensor (Temperature data are also available from original data files) The data in channel 7 are to be preferred over channel 6. Constituents from a tidal analysis of the data show good correspondence with the Texas CSR3.0 model. ========================================================================= Station MOVE-A ============== These files are from POL's 'Move Experiment' file : move_2002-3.acc-d File is in 7 column ACCLAIM format. Temperature in deg C is in column 6. Long term instrumental drift removed pressure in mbars above 504 bars is in column 7. The file was QC'ed by David Blackman. ========================================================================= Station MOVE-B ============== These files are from POL's 'Move Experiment' file : move_2003-4.acc-d File is in 7 column ACCLAIM format. Temperature in deg C is in column 6. Long term instrumental drift removed pressure in mbars above 504 bars is in column 7. The file was QC'ed by David Blackman. ========================================================================= Station Grace2 (Argentine Basin) ================================ This file is from POL's 'Grace Experiment' file : grace_2002-3.acc-d File is in 9 column ACCLAIM format. Temperatures in deg C are in columns 6, and 8. Long term instrumental drift removed pressures in mbars above 524 bars are in columns 7 and 9. The file was QC'ed by David Blackman. ========================================================================= Station Grace3 (Argentine Basin) ================================ These files are from POL's 'Grace Experiment' file grace3_2002-3.acc-d File is in 9 column ACCLAIM format. Temperatures in deg C are in columns 6 and 8. Long term instrumental drift removed pressures in mbars above 525 bars are in columns 7 and 9. The file was QC'ed by David Blackman. No timing information available for last scan so estimated by recording time when clock triggered. Data from sensor DQ87193 (Channels 6 and 7) is considered suspect due to unexplained drop in pressure. ========================================================================= Stations in the Scotia Sea and Drake Passage ============================================ POL deployments in this area were first made in a section between the Falkland Islands and Signy in the South Orkney islands. These stations have names like 'FS1'. Recording then moved west to two deeper (4000 m) stations on the western side of the Drake Passage ('ND1' and 'SD1'), and, most recently, have been on a section between the Falklands and Elephant Island along the official 'Drake Passage' hydrographic section for the World Ocean Circulation Experiment ('ND2' and 'SD2' with the stations including MYRTLE in between). The nomenclature 'ND1' etc. follows that of M.Meredith, 1995. On the temporal variability of the transport through the Drake Passage. University of East Anglia Ph.D thesis. In other publications, for example: Woodworth, P.L., Vassie, J.M., Hughes, C.W. and Meredith, M.P. 1996. A test of the ability of TOPEX/POSEIDON to monitor flows through the Drake Passage. Journal of Geophysical Research, 101(C5), 11935-11947. ND1 is referred to as DN92, SD1 as DS92, ND2 as DN93 and SD2 as DS93. Most instruments were Paroscientific Digiquartz (DQ) pressure transducers with temperature also recorded. BPR's had typically 3 sensors. Instrumental drift has attempted to be removed from all records. Station FS1 (Falkland-Signy Transect - Position 1 at the North) =============================================================== file fs1.8889.acc: this file is in 11 column ACCLAIM format with three pressure sensors in channels 8, 9 and 10 respectively. Units are mbar. Channels 9 and 10 may be used. Channel 8 should not. file fs1.8990.acc: this file is in 11 column ACCLAIM format, use channels 9 or 10 (mbar). file fs1.9092.acc: this file is in 11 column ACCLAIM format. Use channel 8 and 10 (mbar). From tidal analysis, data from this third deployment at FS1 appear to be about 6 minutes too soon using semidiurnals (i.e. phase lags are about 3 degrees less) and correspondingly different values for diurnals. There may well therefore be a systematic clock shift in this deployment. file fs1.9292.acc: this file is in 11 column ACCLAIM format. Use channels 8 or 9 (mbar). However, note that a temperature sensor failed on this deployment, thus data for 21st July 1992 onwards are not temperature-corrected and therefore not useable. Also note the warnings about timings etc. at start of file - phases here look about 3 degrees later compared to deployments 1 and 2, and there are residual tidal signals. No instrumental drift has been removed from this file as it seemed very small. Station FS2 (Falkland-Signy Transect - Position 2 in the Centre) ================================================================ file fs2.8889.acc: this file is in 11 column ACCLAIM format. Use channels 8, 9 or 10 (mbar). As well as the instrumental drift correction, a correction has been made for what appears to be the gauge slipping to greater depth after record 1502 (day 30 1989). file fs2.8990.acc: this file is in 11 column ACCLAIM format. Use channel 9 (mbar). Channel 8 fails on Day 217, 1990, probably due to a battery failure. This data is however sufficently long to allow a 6 month analysis. Channels 9 and 10 worked for the whole period, allowing a 1 year analysis. M2 values are within +/- 0.1 mbar and 0.1 deg from all three sensors. paxe, 22 May 1998 (info from imv) Station FS3 (Falkland-Signy Transect - Position 3 in the South) =============================================================== FS3 is a deep BPR station north-west of Signy Island. file fs3.8990.acc: this file is in 11 column ACCLAIM format. Use channel 9 (mbar). file fs3.9092.acc: this file is in 11 column ACCLAIM format. Use channel 8 or 10 (mbar). file fs3.9292.acc: this file is in 11 column ACCLAIM format. Use channel 9 or 10 (mbar). This file was updated by Philip Axe on 22 May 1998. 15 minutes was added to the timing of each scan, as the originals were 15 minutes too early. When the data was processed, the scan numbers did not tie up with the start and end of the record, and field deployment notes weren't available at that time. The correct timing was found as the sensors were unplugged at sea, and this time is identifiable in the record. For this 15 minute correction to be correct, we must accept that the scan counter did not increment by 1 at the beginning of the record. This has happened before, and so we are confident of the corrected timings. If you have any queries, please contact imv@pol.ac.uk, plw@pol.ac.uk, rsp@pol.ac.uk or paxe@pol.ac.uk Position ND1 ============ file nd1.9192: 11 column ACCLAIM format, use channels 8, 9 or 10 (mbar) Position SD1 ============ file sd1.9192: 11 column ACCLAIM format, use channels 8, 9 or 10 (mbar) ========================================================================= Drake Passage Recoveries December 1996 (North to South) ======================================================= Position NNS ============ file dpnns956.i4d: New 11 column ACCLAIM format, use pressures in data channel 2 (mbar) This BPR consists of a single podule deployed by Geoff Hargreaves and Chris Hughes in November 1995. Position CD =========== file dpc9496a.i4d: New 11 column ACCLAIM format, use pressures in data channel 2 (mbar) ====================================================================================== Drake Passage Recoveries November 1998 (North to South) ======================================================= Position CD =========== file dpc9798.acc: File is in 11 column ACCLAIM format. Temperatures in deg C *10 are in columns 6, 8 and 10 and pressures in mbars above 388 bars are in columns 7, 9 and 11. The file was QC'ed by David Blackman. He replaced the values of individual spikes in the data with interpolated values. ====================================================================================== Drake Passage Recoveries November 1999 (North to South) ======================================================= Position CD =========== file dpc9899.acc: File is in 7 column ACCLAIM format. Temperature in deg C *10 is in column 6 and pressure in mbars above 388 bars is in column 7. The file was QC'ed by David Blackman. He replaced the values of individual spikes in the data with interpolated values. ====================================================================================== Drake Passage Recoveries November 2000 (North to South) ======================================================= Position CD =========== file dpc9900.acc: File is in 7 column ACCLAIM format. Temperature in deg C * 10 is in column 6 and pressure in mbars above 389 bars is in column 7. The file was QC'ed by David Blackman. He replaced the values of individual spikes in the data with interpolated values. ===================================================================================== ===================================================================================== November 2004 Shagex Recoveries Position SHAGEX1 ================ file shagex1_0304.acc: File is in 7 column ACCLAIM format. Temperatures in deg C are in column 6 and pressure in mbars above 145 bars is in column 7. The file was QC'ed by David Blackman. Position SHAGEX2 ================ file shagex2_0304.acc: File is in 7 column ACCLAIM format. Temperatures in deg C are in column 6 and pressure in mbars above 147 bars is in column 7. The file was QC'ed by David Blackman. ============================================== ROPEX Recoveries in the Weddell Sea =================================== The aim of this work was to investigate the tides, and tidal interactions under the Filschner-Ronne Ice Shelf. Tides are the principle mechanism available for mixing, so a tidal model was prepared. This showed the existence of an M2 amphidrome under the ice, but the position of the amphidrome was very sensitve to model parameters. These deployments were to provide the necessary data to validate the model. Five BPRs were deployed in January/February 1998. They were due to be recovered in February 1999. Due to ice conditions however, only 3 have so far (as of June 2000) been recovered. This work is documented in POL Cruise reports 29 (deployment) and 33 (recovery). weddell_CH1 =========== This file is in 10 column ACCLAIM format: Channel 6 : Sea temperature (deg C * 10 - see note below) Channel 7 : Bottom pressure in millibars (282,000mb subtracted) Channel 8 : Non-tidal residual pressure (millibars, calculated with tira) Channel 9 : Predicted tide (millibars, from tira) Channel 10: Blank Location - 59deg 52.046'S 30deg 06.044'W Depth - 2823m Sensor - DQ 68486 2:52:30 18-Jan-1998 to 10:22:30 8-Apr-1999 15-minute data containing drift The temperatures in this file have been multiplied by 10, to make best use of the F8.2 file format that is used in ACCLAIM. This is documented in the header of the file. Harmonic analysis of the file gave the following: MAJOR CONSTITUENTS NSIG= 63 ------------------ NO NAME SPEED H G -- ---- ----- --- --- 1 ZO 0.0000000 661.6196 0.000 9 Q1 13.3986609 3.1642 24.630 11 O1 13.9430356 12.3124 33.845 16 P1 14.9589314 3.2081 42.231 18 K1 15.0410686 9.4538 42.984 29 N2 28.4397295 5.2037 256.051 32 M2 28.9841042 30.7488 265.426 37 S2 30.0000000 17.9744 282.216 44 M3 43.4761563 0.2633 96.935 (For the full set of constituents, see the GLOUP web pages at http://www.pol.ac.uk/psmslh/gloup/gloup.html). Looking at the residuals, the following total pressure values have been flagged, but the original data have not been altered. 6616 1 1998 87 0.625 6617 1 1998 87 0.875 6618 1 1998 87 1.125 17562 1 1998 201 1.125 17563 1 1998 201 1.375 17564 1 1998 201 1.625 29052 1 1998 320 17.625 29053 1 1998 320 17.875 29054 1 1998 320 18.125 34575 1 1999 13 6.375 34576 1 1999 13 6.625 34577 1 1999 13 6.875 34578 1 1999 13 7.125 34579 1 1999 13 7.375 We are grateful to our colleagues at University of East Anglia (UK) for recovering this BPR in April 1999. Ice cover was too thick to allow it to be recovered in February 1999. weddell_CH2 =========== This file is also in 10 column ACCLAIM format: Channel 6 : Sea temperature (deg C * 10 - see note below) Channel 7 : Bottom pressure in millibars (283,000mb subtracted) Channel 8 : Non-tidal residual pressure (millibars, calculated with tira) Channel 9 : Predicted tide (millibars, from tira) Channel 10: Blank Location - 73deg 41.523'S 34deg 36.954'W Depth - 2826m Sensor - DQ 68482 00:07:30 21-Jan-1998 to 16:37:30 17-Feb-1999 15-minute data containing drift The temperatures in this file have been multiplied by 10, to make best use of the F8.2 file format that is used in ACCLAIM. This is documented in the header of the file. Harmonic analysis of the file gave the following: MAJOR CONSTITUENTS NSIG= 63 ------------------ NO NAME SPEED H G -- ---- ----- --- --- 1 ZO 0.0000000 765.8372 0.000 9 Q1 13.3986609 8.1592 359.449 11 O1 13.9430356 34.2902 6.198 16 P1 14.9589314 11.2920 13.924 18 K1 15.0410686 33.8848 14.717 29 N2 28.4397295 8.9353 229.481 32 M2 28.9841042 58.7632 239.754 37 S2 30.0000000 40.2660 262.113 39 K2 30.0821373 12.1015 261.938 44 M3 43.4761563 0.3361 271.658 The file was QC'ed by Mike Smithson. He replaced the values of individual spikes in the data with interpolated values. The replaced scans are listed below: 3730 1 1998 59 20.375 11186 1 1998 137 12.375 3732 1 1998 59 20.875 11190 1 1998 137 13.375 7378 1 1998 97 20.375 11192 1 1998 137 13.875 7407 1 1998 98 3.625 11197 1 1998 137 15.125 7409 1 1998 98 4.125 12846 1 1998 154 19.375 7916 1 1998 103 10.875 12855 1 1998 154 21.625 8780 1 1998 112 10.875 12860 1 1998 154 22.875 8783 1 1998 112 11.625 12862 1 1998 154 23.375 8786 1 1998 112 12.375 12873 1 1998 155 2.125 8867 1 1998 113 8.625 12875 1 1998 155 2.625 8873 1 1998 113 10.125 12898 1 1998 155 8.375 8877 1 1998 113 11.125 12900 1 1998 155 8.875 8890 1 1998 113 14.375 12902 1 1998 155 9.375 8930 1 1998 114 0.375 12906 1 1998 155 10.375 8936 1 1998 114 1.875 12909 1 1998 155 11.125 8943 1 1998 114 3.625 12915 1 1998 155 12.625 8947 1 1998 114 4.625 12918 1 1998 155 13.375 8949 1 1998 114 5.125 34187 1 1999 12 2.625 8970 1 1998 114 10.375 34221 1 1999 12 11.125 9098 1 1998 115 18.375 34228 1 1999 12 12.875 9119 1 1998 115 23.625 34231 1 1999 12 13.625 9187 1 1998 116 16.625 34233 1 1999 12 14.125 9200 1 1998 116 19.875 34271 1 1999 12 23.625 9206 1 1998 116 21.375 34304 1 1999 13 7.875 9208 1 1998 116 21.875 34556 1 1999 15 22.875 9213 1 1998 116 23.125 34680 1 1999 17 5.875 9215 1 1998 116 23.625 34744 1 1999 17 21.875 9221 1 1998 117 1.125 37561 1 1999 47 6.125 9268 1 1998 117 12.875 37563 1 1999 47 6.625 9750 1 1998 122 13.375 37565 1 1999 47 7.125 10174 1 1998 126 23.375 37568 1 1999 47 7.875 11165 1 1998 137 7.125 37574 1 1999 47 9.375 11167 1 1998 137 7.625 37581 1 1999 47 11.125 11169 1 1998 137 8.125 Weddell_MS2 =========== This files is similar to the previous two, except that there is an additional temperature sensor. The same multiplication by 10, to make full use of the space allowed by an F8.2 format has been used, so remember to divide the temperature values by 10! The difference between the two temperature sensors is quite stable over the deployment (9.5 mdegC change in offset per year. Comparing the sensors over the length of the deployment, they have a relative gain of 1.0033 (QT1 vs the Digiquartz), and a mean offset of 0.622 degC). From the harmonic analysis, the signal in the residuals appears to have more high frequency noise after day 276, 1998. The residuals look good, however. A summary of the harmonic components is as follows: MAJOR CONSTITUENTS NSIG= 63 ------------------ NO NAME SPEED H G -- ---- ----- --- --- 1 ZO 0.0000000 549.5192 0.000 9 Q1 13.3986609 7.5116 358.714 11 O1 13.9430356 32.0311 5.188 16 P1 14.9589314 10.5203 12.065 18 K1 15.0410686 31.6815 11.861 29 N2 28.4397295 11.8946 237.195 32 M2 28.9841042 77.2372 247.683 37 S2 30.0000000 52.4889 269.320 39 K2 30.0821373 15.6304 269.335 44 M3 43.4761563 0.4396 263.674 There were no bad scans in this record.