Pathfinder Wiki - User contributions [en]

AY Honors/Weather - Advanced/Answer Key

2005-04-06T01:32:52Z

62.214.34.45:

[[Image:BAROGRAM.JPG|thumb|Barogram of a heavy storm over northern Germany 2005)]]

A '''barograph''' is a recording [[aneroid barometer]]. It produces a paper chart recording the [[barometric pressure]] over [[time]].

Barographs use one or more aneroid cells acting through a gear or lever train to drive a recording arm that has at its extreme end either a scribe or a pen. A scribe records on smoked foil while a pen records on paper. The recording material is mounted on a [[cylinder|cylindrical]] drum which is rotated slowly by [[clockwork]]. Commonly, the drum makes one revolution per [[day]], per [[week]], or per [[month]] and the rotation rate can often be selected by the user.

Because the amount of movement that can be generated by a single aneroid is minuscule, up to seven aneroids (so called Vidie-cans) are often stacked "in series" to amplify their motion. The french Lucien Vidie (1805-1866) was the inventor.

Barographs are required by the [[Federation Aeronautique Internationale|FAI]] to record certain tasks and record attempts associated with [[sailplanes]].

Nowadays, mechanical recording barographs have commonly been superseded by electronic weather instruments that use [[computer]] methods to record the barometric pressure. These are not only less expensive than mechanical barographs but they may also offer both greater recording length and the ability to perform further [[data analysis]] on the captured data including automated use of the data to forecast the weather.

[[Category:Measuring instruments]]
[[Category:Climate]]

[[de:Barograph]]

AY Honors/Weather - Advanced/Answer Key

2005-04-06T01:31:12Z

62.214.34.45:

[[Image:BAROGRAM.JPG|thumb|Barogram of a heavy storm over northern Germany 2005)]]

A '''barograph''' is a recording [[aneroid barometer]]. It produces a paper chart recording the [[barometric pressure]] over [[time]].

Barographs use one or more aneroid cells acting through a gear or lever train to drive a recording arm that has at its extreme end either a scribe or a pen. A scribe records on smoked foil while a pen records on paper. The recording material is mounted on a [[cylinder|cylindrical]] drum which is rotated slowly by [[clockwork]]. Commonly, the drum makes one revolution per [[day]], per [[week]], or per [[month]] and the rotation rate can often be selected by the user.

Because the amount of movement that can be generated by a single aneroid is minuscule, up to seven aneroids (so called Vidie-cans) are often stacked "in series" to amplify their motion. The french Vidie was the inventor.

Barographs are required by the [[Federation Aeronautique Internationale|FAI]] to record certain tasks and record attempts associated with [[sailplanes]].

Nowadays, mechanical recording barographs have commonly been superseded by electronic weather instruments that use [[computer]] methods to record the barometric pressure. These are not only less expensive than mechanical barographs but they may also offer both greater recording length and the ability to perform further [[data analysis]] on the captured data including automated use of the data to forecast the weather.

[[Category:Measuring instruments]]
[[Category:Climate]]

[[de:Barograph]]