ITP54 Data Description

The ITP profiler was configured to operate on a standard sampling schedule of 2 one-way profiles between 7 and 750 m depth each day. In the surface package, the GPS receiver was powered hourly to obtain locations hourly, and buoy temperature and battery voltage status were recorded.

The buoy circulated with the anticyclonic Beaufort Gyre circulation, first heading southward, then westward and northward over the Chukchi Plateau bathymetry, back eastward into the basin, and then southward and westward over the Chukchi shelf. After crossing the dateline (180° longitude) the buoy eventually meandered westward of the Mendelyev Ridge and northward to over 82°N before finally ceasing to transmit after travelling over 11,000 km in over 3 years. While the Microcat provided data (with some large gaps) until July 2014, the last communications from the ITP profiler occurred on August 9, 2012 and the received CTD profiles terminate on October 22, 2011 while the system was still in the Beaufort Sea eastward of 143°W longitude.

The plots to the right are of the final, calibrated, edited data (as opposed to the raw data presented on the active instrument pages).

See the Data Products tab to the left for descriptions of the three levels (I, II, III) of data processing and to access all data.

ITP 54 data can also be found at the links below:

Level II hourly buoy location data in ASCII format: itp54rawlocs.dat

Level III 1-Hz processed profile and Microcat data in MATLAB format: itp54cormat.tar.Z and itp54cormat.zip

Level III 1-db bin-averaged processed profile and Microcat data in MATLAB format: itp54final.mat
Level III 1-db bin-averaged processed profile and Microcat data in ASCII format: itp54final.tar.Z and itp54final.zip

Plot of buoy locations.

ITP54 temperature and salinity contours.

Composite plot of ITP temperature and salinity contours.

ITP 54 dissolved oxygen contours.

Composite plot of ITP dissolved oxygen profiles.

Plot of Microcat time series.