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The World Ocean Database represents the world’s largest collection of ocean profile-plankton data available internationally without restriction. Data comes from the: (a) 65 National Oceanographic Data Centers and nine Designated National Agencies (DNAs) (in Croatia, Finland, Georgia, Malaysia, Romania, Senegal, Sweden, Tanzania, and Ukraine), (b) International Ocean Observing Projects such as historical [[WOCE|World Ocean Circulation Experiment]] (WOCE) and Joint Global Ocean Flux Study (JGOFS), as well as currently active programs such as [[CLIVAR]] and Argo, (c) International Ocean Data Management Projects such as the IOC/IODE Global Oceanographic Data Archaeology and Rescue Project (GODAR), and (d) Real-time Ocean Observing Systems such as the IOC/IODE [[Global_Temperature-Salinity_Profile_Program|Global Temperature-Salinity Profile Project]] (GTSPP). All ocean data acquired by WDC Silver Spring – USA are considered as part of the WDC archive and freely available as public ___domain data.
The World Ocean Database was first released in 1994<sup>1</sup> and updates have been released approximately every four years, 1998<sup>2</sup>, 2001<sup>3</sup>, and 2005<sup>4</sup>. The most recent World Ocean Database series,
==Table 1.0 Comparison of the amount of data in WOD09 with previous ocean databases==
'''Instrument Types'''▼
{| class="wikitable"
|-
! Instrument Type !! NODC (1974)<sup>6</sup> !! NODC (1991)<sup>7</sup> !! WOA94 !! WOD98 !! WOD01 !! WOD05 !! WOD09
|-
| OSD <sup>8</sup> || 425,000 || 783,912 || 1,194,407 || 1,373,440 || 2,121,042 || 2,258,437 || 2,541,298
|-
| CTD <sup>9</sup> || na || 66,450 || 89,000 || 189,555 || 311,943 || 443,953 || 641,845
|-
| MBT <sup>10</sup> || 775,000 || 980,377 || 1,922,170 || 2,077,200 || 2,376,206 || 2,421,940 || 2,426,749
|-
| XBT || 290,000 || 704,424 || 1,281,942 || 1,537,203 || 1,743,590 || 1,930,413 || 2,104,490
|-
| MRB || na || na || na || 107,715 || 297,936 || 445,371 || 566,544
|-
| DRB || na || na || na || na || 50,549 || 108,564 || 121,828
|-
| PFL || na || na || na || na || 22,637 || 168,988 || 547,985
|-
| UOR || na || na || na || na || 37,645 || 46,699 || 88,190
|-
| APB || na || na || na || na || 75,665 || 75,665 || 88,583
|-
| GLD || na || na || na || na || na || 338 || 5,857
|-
|'''Total Stations''' || '''1,490,000''' || '''2,535,163''' || '''4,487,519''' || '''5,285,113''' || '''7,037,213''' || '''7,900,349''' || '''9,155,099'''
|-
| Plankton || na || na || na || 83,650 || 142,900 || 150,250 || 218,695
|-
| SUR <sup>11</sup> || na || na || na || na || 4,743 || 9,178 || 9,178
|}
Ocean profile, plankton data, and metadata are available in the World Ocean Database for
29 depth-dependent variables (physical and biochemical) and 11 instruments types: Ocean Station Data (OSD), Mechanical Bathythermograph (MBT), Expendable Bathythermograph (XBT), Conductivity-Temperature-Depth (CTD), Undulating Oceanographic Recorder (UOR), Profiling Float (PFL), Moored Buoy (MRB), Drifting Buoy (DRB), Gliders (GLD), Autonomous Pinniped Bathythermograph (APB).
The data in the World Ocean Database are made available through the on line search and retrieval system known as the WODselect. Another project using the World Ocean Database variables is the [[World Ocean Atlas]] (WOAselect). The WOAselect is a selection tool by which the user can designate a geographic area, depth, and oceanographic variable to view climatological means or related statistics for a given variable at the requested depth for the requested geographic area. The World Ocean Atlas series is a set of gridded (1° grid), climatological, objectively analyzed fields of the variables in the World Ocean Database.
==References==
1. “World Ocean Atlas 1994”. [[National Oceanographic Data Center]].<br />
2. “World Ocean Database 1998”. [[National Oceanographic Data Center]].<br />
3. “World Ocean Database 2001”. [[National Oceanographic Data Center]].<br />
4. “World Ocean Database 2005”. [[National Oceanographic Data Center]].<br />
5. “World Ocean Database 2009”. [[National Oceanographic Data Center]].<br />
6. Based on statistics from Levitus, S. (1982) Climatological Atlas of the World Ocean). NOAA Professional paper No. 13, pp. 191.<br />
7. Based on NODC Temperature Profile CD-ROM.<br />
8. WOD09 OSD dataset includes data from 121,763 low-resolution CTD casts and 1,489 low-resolution XCTD casts.<br />
9. WOD09 CTD dataset includes data from 5,985 high-resolution XCTD casts.<br />
10. WOD09 MBT dataset includes data from 80,325 DBT profiles and 5,659 Micro-BT profiles.<br />
11. Surface data are represented differently than profile data in WOD09 – all observations in a single cruise are combined into one “station” with zero depth, values of measured variables along with latitude, longitude, and Julian year-day to identify and locate individual sets of observations.<br />
==External links==
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