ACM13 (Hunter Channel component of Deep Basin)

This component of the Deep Basin experiment produced 40 current meter records from 8 moorings. From here you can

In addition to current meters, two thermistor chains were deployed on the ACM13 moorings. You can reach the thermistor data by clicking here. Note also that Deep Basin moorings 349 and 363, which were not in Hunter Channel, have been included in this dataset and can be accessed below.

If you download any of the records you should read the note on file format.

mooringdepthinstr typedatesmetadatadownload
349 997 meters Aanderaa RCM8 19 Dec 92 - 04 Apr 95 view metadata download record
349 4352 meters Aanderaa RCM8 19 Dec 92 - 04 Apr 95 view metadata download record
349 4849 meters Aanderaa RCM8 19 Dec 92 - 04 Apr 95 view metadata download record
353 175 meters Aanderaa RCM8 11 Dec 92 - 27 May 94 view metadata download record
353 2025 meters Aanderaa RCM8 11 Dec 92 - 27 May 94 view metadata download record
353 3125 meters Aanderaa RCM8 11 Dec 92 - 27 May 94 view metadata download record
353 3830 meters Aanderaa RCM8 11 Dec 92 - 27 May 94 view metadata download record
353 4105 meters Aanderaa RCM8 11 Dec 92 - 27 May 94 view metadata download record
354 4000 meters Aanderaa RCM8 12 Dec 92 - 28 May 94 view metadata download record
354 4335 meters Aanderaa RCM8 12 Dec 92 - 28 May 94 view metadata download record
355 905 meters Aanderaa RCM8 13 Dec 92 - 28 May 94 view metadata download record
355 2005 meters Aanderaa RCM8 13 Dec 92 - 28 May 94 view metadata download record
355 3155 meters Aanderaa RCM8 13 Dec 92 - 28 May 94 view metadata download record
355 4310 meters Aanderaa RCM8 13 Dec 92 - 22 May 94 view metadata download record
356 4100 meters Aanderaa RCM8 15 Dec 92 - 30 May 94 view metadata download record
357 4233 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
357 4470 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
358 4 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 13 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 22 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 30 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 39 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 48 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 56 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 65 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 74 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 82 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 91 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 100 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 108 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 117 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 126 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 134 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 143 meters ADCP 15 Dec 92 - 14 Apr 94 view metadata download record
358 900 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
358 2000 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
358 3100 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
358 4310 meters Aanderaa RCM8 15 Dec 92 - 29 May 94 view metadata download record
363 3485 meters Aanderaa RCM8 16 Dec 92 - 26 May 94 view metadata download record
363 3705 meters Aanderaa RCM8 16 Dec 92 - 26 May 94 view metadata download record

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Brief description of ACM13

The Deep Basin Experiment took place in and around the Brazil Basin, a region west of the Mid-Atlantic Ridge stretching from the Ceara Rise near the equator in the north, to the Santos Plateau - Rio Grande Rise system near 30 deg S. A principal objective was to understand the mean circulation below the thermocline; the Brazil Basin was selected because it is a region of expected low eddy KE, a useful attribute in a program aimed at the mean flow.

Five current meter arrays were deployed at passages that connect the Brazil Basin to neighboring regions. We are concerned here with six moorings that were installed by IFM-Kiel in the Hunter Channel, a deep passage at the southeastern corner of the basin, and two additional moorings north of Hunter Channel. The moorings were installed in December 1992 and recovered about a year and a half later.

Related publications

Zenk, W., G. Siedler, B. Lenz and N.G. Hogg (1999): Antarctic Bottom Water flow through the Hunter Channel. J. Phys. Oceanogr., 29(11), 2785-2801.

Paetzold, J., K. Heidland, W. Zenk and G. Siedler (1996): On Bathymetry of the Hunter Channel. In: Wefer, G., W.H. Berger, G. Siedler and D.J. Webb (Eds.): The South Atlantic: Present and Past Circulation. Springer Verlag, Berlin, Heidelberg, 355-361.

Speer, K.G. and W. Zenk (1993): The flow of Antarctic Bottom Water into the Brazil Basin. J. Phys. Oceanogr., 23, 2667-2682.

Speer, K. G., W. Zenk, G. Siedler, J. Patzold and C. Heidland (1992): First resolution of bottom water flow through the Hunter Channel in the South Atlantic. Earth and Planetary Science Letters, 113, 287-292.

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Format of the current records

These files have been compressed with the ZIP compression utility. After downloading them, you will need to expand them. On a PC, WinZip or Pkunzip will do the job. Other utilities are available for the Unix and Macintosh environments. After expansion, you will have ascii files in OSU's stranger format.

The stranger format begins with several lines of header information that are meant to be machine-readable. They contain a Fortran format specification that will be useful in reading the file, a pointer to the first line of data, and a description of the data. Each line of the current record itself contains the time of the sample, the values recorded, and a line count.

Please be aware that end-of-line in these files is a carriage-return plus line-feed (the PC convention). This means that in a Unix environment (where a single line-feed serves as end-of-line) you may want to remove the carriage-returns.

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