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Estuarine Salinity Zones in US East Coast, Gulf of Mexico, and US West Coast from 1999-01-01 to 1999-12-31 (NCEI Accession 0127396)

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
26 September 2015
Modified Date
11 October 2015
Update Frequency
asNeeded
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Identifier
estuarine-salinity-zones-in-us-east-coast-gulf-of-mexico-and-us-west-coast-from-1999-01-01-to-1
Landing Page
http://catalog.data.gov/dataset/estuarine-salinity-zones-in-us-east-coast-gulf-of-mexico-and-us-west-coast-from-1999-01-01-to-1
Temporal Coverage
1 January 1999 — 31 December 1999
Language
eng

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Description

These unprojected (geographic coordinates) 3-Zone Average Annual Salinity Digital Geographies are based on analysis of long-term salinity data for 147 estuaries of the contiguous United States. Each estuary is subdivided into three zones between the head(s) of tide, and the seaward boundaries based on annual-averaged and depth-averaged salinities. The salinities used to define the three zones are: (1) Tidal Fresh Zone (0 to 0.5 parts per thousand); (2) Mixing Zone (0.5 to 25 parts per thousand); (3) Seawater Zone (25 parts per thousand or greater). This 3-zone scheme is considered static rather than dynamic, because it does not take into account the seasonal variations in salinity patterns and stratification that occur in most estuaries. Nonetheless, it provides a simple and readily understandable way to depict the long-term salinity characteristics of U.S. estuarine waters. Note that not all estuaries contain all three zones - for example, Baffin Bay, Texas, receives relatively little annual freshwater inflow, and is considered to be entirely Seawater Zone. This 3-zone scheme was originally presented in the National Estuarine Inventory (NEI) Data Atlas, Vol. I (NOAA/NOS 1985) for 92 estuaries of the contiguous United States. In the 1990s, digital geographies were refined and many estuaries were added to become a key layer within the Coastal Assessment Framework (NOAA 2007). These 3-Zone Average Annual Salinity Digital Geography have been used for applications in natural resource science and management. They provided the spatial framework and basis for development of NOAA's Estuarine Living Marine Resources (ELMR) Program (Nelson and Monaco 2000), and also for NOAA's National Estuarine Eutrophication Assessment (Bricker et al. 2007).

General Information

Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

  • The rights statement is at

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