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Long-Term Agricultural Research (LTAR) network - Meteorological Collection

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posted on 2023-11-30, 08:46 authored by USDA ARS LTAR Network

The LTAR network maintains stations for standard meteorological measurements including, generally, air temperature and humidity, shortwave (solar) irradiance, longwave (thermal) radiation, wind speed and direction, barometric pressure, and precipitation. Many sites also have extensive comparable legacy datasets. The LTAR scientific community decided that these needed to be made available to the public using a single web source in a consistent manner. To that purpose, each site sent data on a regular schedule, as frequently as hourly, to the National Agricultural Library, which has developed a web service to provide the data to the public in tabular or graphical form.

This archive of the LTAR legacy database exports contains meteorological data through April 30, 2021. For current meteorological data, visit the GeoEvent Meteorology Resources page, which provides tools and dashboards to view and access data from the 18 LTAR sites across the United States.

Resources in this dataset:

  • Resource Title: Meteorological data.

    File Name:

    Resource Description: This is an export of the meteorological data collected by LTAR sites and ingested by the NAL LTAR application. This export consists of an SQL schema definition file for creating database tables and the data itself.

    The data is provided in two formats: SQL insert statements (.sql) and CSV files (.csv). Please use the format most convenient for you. Note that the SQL insert statements take much longer to run since each row is an individual insert.

    Description of zip files

    The ltararchive*.zip files contain database exports. The schema is a .sql file; the data is exported as both SQL inserts and CSV for convenience. There is a README in markdown and PDF in the zips.

    Contains the database export of the schema and data for the site, site_station, and met tables as SQL insert statements. --> has data until 2020-12-31 --> has data until 2021-04-30

    Contains the database export of the schema and data for the site, site_station, and met tables as CSV. --> has data until 2020-12-31 --> has data until 2021-04-30

    Contains the raw CSV files that were sent to NAL from the LTAR sites/stations. --> has data until 2021-04-30


Agricultural Research Service


Data contact name

Sadler, John

Data contact email


USDA Agricultural Research Service

Intended use

Provide meteorological data in near-real time for agricultural areas around the United States

Temporal Extent Start Date


Temporal Extent End Date



  • irregular


  • Not specified

Geographic Coverage


ISO Topic Category

  • climatologyMeteorologyAtmosphere

Ag Data Commons Group

  • Long-Term Agroecosystem Research

National Agricultural Library Thesaurus terms

agricultural research; air temperature; humidity; light intensity; wind speed; atmospheric pressure; meteorological data; rain gauges; photons; detectors; photosynthetically active radiation; anemometers; vanes; hygrometers; spectrometers; radiometers; surface temperature; climate; shortwave radiation; wind direction; terrestrial radiation; biosphere; vegetation

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

USDA ARS LTAR Network (2021). Long-Term Agricultural Research (LTAR) network - Meteorological Collection. USDA Agricultural Research Service.

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