Lamont-Doherty Earth Observatory
Office of Naval Research
Data Index by Source
Data Index by Type
Data Index by Number

Labrador Sea Deep Convection Experiment
Data Collection

assembled by Gerd Krahmann and Martin Visbeck
Lamont-Doherty Earth Observatory of Columbia University


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Deep convection is a central component of the thermohaline circulation of the world ocean. Cooling and salinization of surface waters at high latitudes cause them to sink to great depth. This cold, dense water then spreads away from the formation site to renew the deep and bottom waters of the world ocean. The details of the convective process remain largely unknown, however, because they are difficult to observe and model. The purpose of the Labrador Sea convection experiment is, by a combination of field observations, laboratory studies, theory and modeling, to improve our understanding of the convective process and hence the fidelity of parametric representations used in large-scale models.

Field work in support of the Labrador Sea Convection Experiment

The field work for this experiment had four components:


We have here collected data from the scientists who participated in the Labrador Sea Deep Convection Experiment or who did measurements or experiments during the same period as the main experiment (1996-1998). The collection contains three lists of the data sets. One organized by the Principal Investigator or contributor of the data, one by the type of the data, and one by the number of the dataset. These three lists can be accessed directly through links on the top of each html page. Have a look at the timecoverage of the datasets. We also created maps with the locations of velocity measurements, T and S measurements, floats and drifters, meteorological measurements, and model and ice data.

File format

All data files of the Labrador Sea Deep Convection Experiment data collection are stored in NetCDF format. We have tried to make the files and the information stored within as self-explanatory as possible. There exist several software packages which are able to read and visualize NetCDF data. A Matlab interface can be found at the mexcdf homepage. A great software package to have quick look at NetCDF data is ncview.

Updates and Errata

This is version 1.0 of the Labsea Data Collection.

If you have the CD-ROM follow this link to look for updates or Errata.

Look here for the release history of the data you are looking at.



This data has been released for free scientific usage. We request that you acknowledge the original sources of the data. We also suggest that users contact the original sources of the data before publishing own work with the data as the sources might have updated versions of the data. An acknowledgement of this data collection would be nice.


The software, data, and related materials are provided as-is, without warranty of any kind including warranties of performance or merchantability or fitness for a particular use or purpose (as set forth in UCC 2312-2313) or for any purpose whatsoever, for the enclosed product, however used.

In no event shall LDEO/Columbia University be liable for incidental or consequential damages of any kind, including economic damage or injury to property and lost profits, regardless of whether LDEO/Columbia University be advised, have reason to know, or in fact shall know of the possibility.

User bears all risk relating to quality and performance of the software and data.

This is Lamont-Doherty Earth Observatory Technical Report LDEO 2003-2 .

Copyright © 2003 Lamont-Doherty Earth Observatory.

Sponsored by the U.S. Government, ONR Grant N00014-98-1-0302. All rights reserved.

Last change: 03 Jun 2009. Gerd Krahmann