Automated Meteorological Data Acquisition System: Difference between revisions

Revision as of 08:43, 21 November 2017

Revision as of 08:44, 21 November 2017

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#REDIRECT [[Automated meteorological data acquisition system]]

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[[File:Expo AMeDAS-2005-7-22.jpg|thumb|AMeDAS]]

'''AMeDAS''' (automated meteorological data acquisition system)''', commonly known in Japanese as "アメダス" (''amedasu''), is a high-resolution [[surface observation]] network developed by the [[Japan Meteorological Agency]] (JMA) used for gathering regional weather data and verifying forecast performance. The system began operating on 1 November 1974, and currently comprises 1,300 stations throughout Japan (of which over 1,100 are unmanned), with an average separation of {{convert|17|km|mi|abbr=on}}.

Observations at manned stations cover weather, wind [[wind direction|direction]] and [[wind speed|speed]], types and amounts of [[Precipitation (meteorology)|precipitation]], [[List of cloud types|types]] and [[Cloud base|base]] heights of clouds, [[visibility]], air temperature, [[humidity]], [[sunshine duration]], and [[atmospheric pressure]]. All of these (except weather, visibility and cloud-related meteorological elements) are observed automatically.

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At unmanned stations, observations are performed every 10 minutes. About 700 of the unmanned stations observe precipitation, air temperature, wind direction and speed, and sunshine duration, while the other stations observe only precipitation.

For about 280 stations (manned or unmanned) located in areas of heavy snowfall, snow depth is also observed.

All the observational data is transmitted to the AMeDAS Center at JMA Headquarters in Tokyo on a [[Real-time computing|real time]] basis via dedicated telephone lines. The data is then delivered to the whole country after a quality check.

As well as weather conditions, AMeDAS is also used in the observation of [[natural disaster]]s. Temporary observation points are set up in areas where there are signs of [[volcanic eruption]]s or earthquakes.

== See also ==

* [[Mesonet]]

== External links ==

* [http://www.jma.go.jp/jma/en/Activities/observations.html Japan Meteorological Agency observations descriptions]

{{Meteorological equipment}}

{{Earth-based meteorological observation}}

{{DEFAULTSORT:Automated Meteorological Data Acquisition System}}

[[Category:Geography of Japan]]

[[Category:Japan Meteorological Agency]]

[[Category:Meteorological data and networks]]

[[Category:Meteorological instrumentation and equipment]]

[[Category:Science and technology in Japan]]

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