Directory taodata/currents/adcp Please note that this ftp site is not regularly maintained. The standard ADCP data delivery is now accessed through: http://www.pmel.noaa.gov/tao/data_deliv/ The sub-directories listed below contain files of daily averaged Acoustic Doppler Current Profiler (ADCP) data from moorings on the equator at 110W, 140W, 170W, 165E, and 156E (maintained by NOAA's Pacific Marine Environmental Laboratory, PMEL). The 170w data prior to July 1996 were provided by Prof. Robert Weisberg, University of South Florida. The 147e data prior to Feb 1993 by Prof. Kunio Kutsuwada, Tokai University, and the 147e data beginning Apr 94 by Dr. Yoshifumi Kuroda, Jamstec. At 165e, data were collected and processed by PMEL, except for the data from Feb 97 to Jul 01, collected and processed by Jamstec, Dr. Yoshifumi Kuroda. 170W (courtesy of Prof. Robert Weisberg, University of South Florida through July 1996, from PMEL thereafter), and 147E (courtesy of Prof. Kunio Kutsuwada, Tokai University), through February 1993, Dr. Yoshifumi Kuroda, Jamstec thereafter). There are also data from a single deployment at 8N, 125W. The 150 kHz ADCPs were mounted either downward looking from surface moorings or upward looking from subsurface moorings. The data are organized into location subdirectories listed below. Each file within the PMEL site subdirectories contain data from individual mooring deployments. At non-PMEL sites there may be one file which contains data from more than one mooring deployment. Filenames and time series start and end dates are also listed below. taodata/currents/adcp/110w filename start date end date orientation pr04d.adcp 17 May 91 26 Oct 91 down pr06d.adcp 30 Oct 91 11 May 92 down pr08d.adcp 14 May 92 3 Nov 92 down pr10d.adcp 6 Nov 92 7 May 93 down pr12d.adcp 9 May 93 8 Sep 93 down pr14d.adcp 11 Sep 93 4 May 94 down pr16d.adcp 8 Jun 94 22 Aug 94 down pr18d.adcp 20 Sep 94 22 Feb 95 down pr20d.adcp 25 Feb 95 10 Aug 95 down ea1d.adcp 12 Aug 95 18 May 96 up ea2d.adcp 20 May 96 8 Oct 96 up ea2bd.adcp 11 Oct 96 21 Feb 97 up ea3d.adcp 24 Feb 97 27 Feb 98 up ea4d.adcp 2 Mar 98 9 May 99 up ea5d.adcp 11 May 99 13 Nov 99 up ea6d.adcp 16 Nov 99 7 May 00 up ea7d.adcp 9 May 00 6 Apr 01 up ea8d.adcp 9 Apr 01 10 Mar 02 up ea9d.adcp 13 Mar 02 28 Oct 02 up ea10.adcp to Nov 03 available soon taodata/currents/adcp/140w pr01d.adcp 1 May 90 24 Oct 90 down pr02d.adcp 28 Oct 90 6 May 91 down pr03d.adcp 9 May 91 6 Nov 91 down pr05d.adcp 10 Nov 91 28 Apr 92 down pr07d.adcp 1 May 92 12 Sep 92 down pr09d.adcp 16 Sep 92 25 Apr 93 down pr11d.adcp 28 Apr 93 11 Oct 93 down pr13d.adcp 14 Oct 93 26 May 94 down pr15d.adcp 29 May 94 10 Oct 94 down pr17d.adcp 13 Oct 94 20 Mar 95 down pr19d.adcp 23 Mar 95 9 Sep 95 down ca2d.adcp 5 Sep 96 20 Oct 97 up ca3d.adcp 22 Oct 97 27 Sep 98 up ca4d.adcp 29 Sep 98 18 Sep 99 up ca5d.adcp 21 Sep 99 21 Sep 00 up ca6d.adcp 24 Sep 00 8 Sep 01 up ca7d.adcp 11 Sep 01 25 Sep 02 up ca8d.adcp 28 Aug 02 18 Sep 03 up taodata/currents/adcp/170w 170w.adcp 16 May 88 18 Feb 91 up 170w_4.adcp 22 Feb 91 28 jan 92 up 170w_5.adcp 31 Jan 92 29 Mar 93 up 170wrtu.adcp 1 Apr 93 20 Mar 94 down 170w_7.adcp 24 Mar 94 15 Apr 95 up 170w_8.adcp 18 Apr 95 26 Jul 96 up ka1d.adcp 29 Jul 96 22 May 97 up ka2d.adcp 25 May 97 22 Jun 98 up ka3d.adcp 24 Jun 98 18 Jul 99 up ka4ad.adcp 21 Jul 99 4 Nov 99 up ka4bd.adcp 6 Nov 99 1 Jul 00 up ka5d.adcp 5 Jul 00 16 Jun 01 up ka6d.adcp 18 Jun 01 19 Jun 02 up ka7d.adcp 21 Jun 02 28 Jun 03 up taodata/currents/adcp/165e fu1d.adcp 30 Mar 91 4 Aug 91 down fu3d.adcp 8 Aug 91 6 Feb 92 down fu5d.adcp 9 Feb 92 1 Aug 92 down fu7d.adcp 25 Aug 92 19 Nov 92 down fu7bd.adcp 13 Dec 92 14 Mar 93 down fu9d.adcp 24 Mar 93 23 Dec 93 down tc1d.adcp 26 Dec 93 14 Apr 94 down tc1bd.adcp 16 Apr 94 15 Dec 94 down tc5d.adcp 2 May 95 27 Jan 96 down wa1d.adcp 30 Jan 96 10 Jul 96 up wa1bd.adcp 12 Jul 96 29 Jan 97 up wa1cd.adcp 1 Feb 97 12 Jun 97 up 165ed97.adcp 1 Feb 97 7 Jan 98 up 165ed98.adcp 10 Jan 98 17 Mar 99 up 165ed99.adcp 20 Mar 99 28 Feb 00 up 165ed00.adcp 1 Mar 00 7 Jul 01 up wa2ad.adcp 7 Apr 01 8 Jul 01 up wa2d.adcp 10 Jul 01 2 Nov 01 up wa3d.adcp 4 Nov 01 4 Nov 02 up wa4d.adcp 6 Nov 02 22 Nov 03 up taodata/currents/adcp/156e fu2d.adcp 29 Aug 91 27 Feb 92 down fu4d.adcp 2 Mar 92 4 Sep 92 down fu6d.adcp 16 Sep 92 23 Dec 92 down fu6bd.adcp 8 Feb 93 8 Mar 93 down fu8d.adcp 12 Mar 93 27 Apr 94 up tc4d.adcp 30 Apr 94 10 Dec 94 down taodata/currents/adcp/147e 147ed92.adcp 1 Jan 92 23 Feb 93 up 147ed94.adcp 29 Apr 94 17 Dec 94 up 147ed95.adcp 4 Jan 95 10 Feb 96 up 147ed96.adcp 14 Feb 96 17 Feb 97 up 147ed97.adcp 20 Feb 97 22 Jan 98 up 147ed99.adcp 23 Feb 99 15 Nov 99 up 147ed00.adcp 18 Nov 99 6 Sep 00 up taodata/currents/adcp/125w8n pa1.adcp 2 Apr 97 23 Apr 98 up Daily means are computed between 0000 and 2359 GMT. In general surface moorings are recovered and redeployed at roughly 6-month intervals. Subsurface mooring deployments are typically 1 year long. After processing and quality checks have been performed data will be appended to existing files 6-12 months after recovery. ADCP data from moorings maintained by PMEL (110W, 170W, 140W, 165E, 156E) have been corrected for variations in sound velocity. The adcp bin width and pulse length were set to 8m, resulting in a velocity measurement that represents a weighted average over 16m depth, sampled at 8m-depth intervals. The corrected data available here have been remapped by interpolation to 5m depth intervals. Data from the moorings at 110W and 140W, between 1990 and 1995, and at 170W from Apr 1993 to Mar 1994 were at times significantly biased due to presence of fish near the moorings. Corrections to the ADCP data have been made using methods described in the following publications: Plimpton, P.E., H.P. Freitag, and M.J. McPhaden (1995): Correcting moored ADCP data for fish-bias errors at 0°, 110°W and 0°, 140°W from 1990 to 1993. NOAA Tech. Memo. ERL PMEL-107, 49 pp. http://www.pmel.noaa.gov/pubs/PDF/plim1586/plim1586.pdf Plimpton, P.E., H.P. Freitag, and M.J. McPhaden (1997): ADCP velocity errors from pelagic fish schooling around equatorial moorings. J. Atmos. Oceanic Tech., 14, 1212-1223. http://corona.pmel.noaa.gov/j_pdf/1998/plim1726.pdf Plimpton, P.E., H.P. Freitag, and M.J. McPhaden (2000): Correcting moored ADCP data for fish-bias errors at 0°, 110°W and 0°, 140°W from 1993 to 1995. NOAA Tech. Memo. OAR PMEL-117, NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, 35 pp. http://www.pmel.noaa.gov/pubs/PDF/plim2104/plim2104.pdf Plimpton, P.E., H.P. Freitag, M.J. McPhaden, and R.H. Weisberg (1997): Using echo intensity to correct moored ADCP data for fish-bias errors at 0°, 170°W. NOAA Tech. Memo. ERL PMEL-111, 163 pp. http://www.pmel.noaa.gov/pubs/PDF/plim1843/plim1843.pdf The PMEL processing techniques for adcp data from upward looking subsurface moorings are described in: Plimpton, P.E., H.P. Freitag, and M.J. McPhaden (2004): Processing of subsurface ADCP data in the equatorial Pacific. NOAA Tech. Memo. OAR PMEL-125, 41 pp http://www.pmel.noaa.gov/pubs/PDF/plim2635/plim2635.pdf Details on the 170W ADCP data may be found in: "Upper ocean variability on the equator in the west-central Pacific at 170W" by R.H. Weisberg and S.P. Hayes, J. Geophys. Res., 100, pp. 20485-20498, 1995 and for the period April 1993 to March 1994 in: "Using echo intensity to correct moored ADCP data for fish-bias error at 0, 170W", by Plimpton, P.E., H.P Freitag, M.J McPhaden, and R.H. Weisberg, NOAA Technical Memorandum ERL PMEL-111, 17pp., 1997. Details on the first 147E ADCP data may be found in: "Long-Range Measurement of Surface Oceanic Current in the Western Equatorial Pacific by Acoustic Doppler Current Profiler", by Kunio Kutsuwada and Hideo Inaba, J. of Meteor. Soc. of Japan, Vol 73, No. 1, pp. 1-11, 1995. Surface moorings have on occasion broken free from their anchors and drifted from their deployed location while still returning data. Daily mooring locations can be found in the corresponding met data files. For example, to find the locations for the mooring at 0n110w, refer to the file 0n110w.met in the directory taodata/surface. Daily velocity data from these drifting buoys have been corrected using drift velocities computed from location changes. Information on buoys that have drifted is listed in the file taodata/hourly/drifters.doc for early deployments and on the TAO web page for later deployments. Please send comments, questions or problems concerning these data to "freitag@pmel.noaa.gov".