ITP57 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.

After deployment, the buoy drifted north with the Transpolar Driftstream current predominantly between the 130 and 140 °E meridians, parallel to and several times crossing the Lomonsov Ridge. The system came as close as 210 km to the North Pole, before continuing towards Fram Strait. However, ITP 57 never completed the transect across the Eurasian Basin. After operating consistently for 472 days, and with substantial power still remaining in the surface package and profiler battery packs, the surface unit abruptly ceased communicating via Iridium in late December 2013.

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 57 data can also be found at the links below:

Level II hourly buoy location data in ASCII format: itp57rawlocs.dat

Level III 1-Hz processed profile data in MATLAB format: itp57cormat.tar.Z and itp57cormat.zip

Level III 1-db bin-averaged processed profile data in MATLAB format: itp57final.mat
Level III 1-db bin-averaged processed profile data in ASCII format: itp57final.tar.Z and itp57final.zip

Plot of buoy locations.

ITP57 temperature and salinity contours.

Composite plot of ITP temperature and salinity profiles.

ITP57 dissolved oxygen contours.

Composite plot of ITP dissolved oxygen profiles.