ECCO Gent-McWilliams Ocean Bolus Velocity - Monthly Mean 0.5 Degree (Version 4 Release 4)

This dataset contains monthly-averaged Gent-McWilliams ocean bolus velocity interpolated to a regular 0.5-degree grid from the ECCO Version 4 revision 4 (V4r4) ocean and sea-ice state estimate. Estimating the Circulation and Climate of the Ocean (ECCO) ocean and sea-ice state estimates are dynamically and kinematically-consistent reconstructions of the three-dimensional, time-evolving ocean, sea-ice, and surface atmospheric states. ECCO V4r4 is a free-running solution of the 1-degree global configuration of the MIT general circulation model (MITgcm) that has been fit to observations in a least-squares sense. Observational data constraints used in V4r4 include sea surface height (SSH) from satellite altimeters [ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1,2,3, CryoSat-2, and SARAL/AltiKa]; sea surface temperature (SST) from satellite radiometers [AVHRR], sea surface salinity (SSS) from the Aquarius satellite radiometer/scatterometer, ocean bottom pressure (OBP) from the GRACE satellite gravimeter; sea ice concentration from satellite radiometers [SSM/I and SSMIS], and in-situ ocean temperature and salinity measured with conductivity-temperature-depth (CTD) sensors and expendable bathythermographs (XBTs) from several programs [e.g., WOCE, GO-SHIP, Argo, and others] and platforms [e.g.,research vessels, gliders, moorings, ice-tethered profilers, and instrumented pinnipeds]. V4r4 covers the period 1992-01-01T12:00:00 to 2018-01-01T00:00:00.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	August 11, 2026, 01:34 (UTC)
Created	April 1, 2025, 15:32 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	57df18b5-5e83-4737-bebb-9b0e0598cee9
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/ECG5M-BOL44
license	https://www.usa.gov/government-works
modified	2026-08-03T22:16:05Z
programCode	{026:000}
publisher	NASA/JPL/PODAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	1c45fd5f110621e8da89a98312c08325a9af068c5f049c0870ffdc44bc2aac03
source_schema_version	1.1
spatial	["CARTESIAN", [{"EastBoundingCoordinate": 180.0, "NorthBoundingCoordinate": 90.0, "SouthBoundingCoordinate": -90.0, "WestBoundingCoordinate": -180.0}]]
temporal	1992-01-01/2018-01-01
theme	{"Earth Science"}