This is a Non-Federal dataset covered by different Terms of Use than

Primary Production Data Sets from Pump Casts

Metadata Updated: August 15, 2019

Land-Margin Ecosystem Research in the Columbia River Estuary is an interdisciplinary approach to investigating couplings between hydrological, geochemical and ecological processes within estuarine turbidity maxima. General hydrographic profiles indicate the nature of physical, biological, and particle stratification in the water column. From these data, the principle investigators determined depths to sample during pump casts. In addition, profiles of hydrographic and biophysical parameters may be used to explore potential links between or among these parameters and to verify instrument accuracy. The specific data set description is the following: Estuarine turbidity maxima (ETM) are hypothesized to be sites of enhanced biological activity and chemical transformations. An active microbial loop and enhanced copepod grazing relative to surrounding areas may lead to rapid regeneration of nutrients capable of fueling primary production. Production and its associated biochemical parameters can be used to map the ETM and determine the riverine versus marine contributions to ETM particulate matter.

Access & Use Information

Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

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Metadata Date June 15, 1998
Metadata Created Date August 15, 2019
Metadata Updated Date August 15, 2019
Reference Date(s) January 1, 1998 (publication)
Frequency Of Update annually

Metadata Source

Harvested from Pennsylvania Geospatial Data Clearinghouse

Additional Metadata

Resource Type Dataset
Metadata Date June 15, 1998
Metadata Created Date August 15, 2019
Metadata Updated Date August 15, 2019
Reference Date(s) January 1, 1998 (publication)
Responsible Party Oregon State University, College of Oceanic and Atmospheric Sciences (Point of Contact)
Contact Email
Access Constraints Use Constraints: None, Access Constraints: None
Bbox East Long -123
Bbox North Lat 46.2667
Bbox South Lat 46.1667
Bbox West Long -124
Coupled Resource
Frequency Of Update annually
Harvest Object Id e8d29c1f-3c39-468a-83c7-46a29fc66bcc
Harvest Source Id 461fc638-8de6-4c37-9f60-43399e6f6031
Harvest Source Title Pennsylvania Geospatial Data Clearinghouse
Licence Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Metadata Language
Metadata Type geospatial
Progress underDevelopment
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1990-01-01
Temporal Extent End 1995-01-01

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