Thermometer hut

Two thermometer huts in Poland

Inside view with older instruments: thermohygrograph (left), Hütten psychrometer (right back) and (right front top) maximum and (bottom) minimum thermometer

The thermometer hut , also climate hut , weather hut , weather house - more rarely: English hut , Stevenson hut (English Stevenson screen , named after the designer Thomas Stevenson ) - is used in a standardized design, especially in weather stations in climate measurement networks for meteorological - climatological measurements and in the synoptic measurement network .

execution

The thermometer hut is a white lacquered lamellar box, usually made of wood, and serves to protect the meteorological measuring devices inside from disruptive or even damaging environmental and weather influences such as solar radiation , precipitation (rain and snow) and strong winds . Standard features are:

• Slat construction (to ensure the necessary ventilation), double slats i. A. made of wood
• white paint (for the purpose of high reflection of solar radiation, therefore only slight warming in intense sunlight; albedo )
• Ventilation also at the bottom of the hut
• two double doors
• slightly sloping roof (in the northern hemisphere to the south, in the southern hemisphere to the north)

In addition to the (large) thermometer hut, there are also smaller versions, e.g. B. for measurements in the field ( agricultural meteorology )

A thermometer hut contains measuring instruments, previously purely mechanical instruments that had to be read manually on a regular basis, and since the 1990s increasingly electronic measuring devices with automatic data acquisition and data transmission, which are required to determine the meteorologically relevant air parameters such as air temperature and humidity .

These are usually:

• the psychrometer , consisting of
  • Thermometer for measuring the air temperature (on the dry thermometer vessel)
  • Thermometer for measuring the wet temperature (on the humidified thermometer vessel)
• the minimum thermometer
• the maximum thermometer
• the thermohygrograph
• the humidity sensor for dew point measurement

Lineup

Manual reading and recording of the measurement data in the 1940s.

• unshaded on the measuring field, if possible on a natural surface such as short-cut lawn; see climate garden
• at a considerable distance from trees, hedges and buildings or other obstacles (general rule: obstacle distance greater than twice the obstacle height)
• in measuring networks of the German Meteorological Service , in accordance with the requirements set by the World Meteorological Organization (WMO) so that the measuring sensors are 2 m above the ground. Internationally, heights of 1.25 to 2 m are still used in some cases.
• the door opening is to the north in the northern hemisphere and to the south in the southern hemisphere.
• The step in front of the hut has no contact with the support frame of the thermometer hut to avoid undesirable vibrations.

literature

• Technical manual (THB) for weather reporting points of the synoptic climatological measurement and observation network , from regulations and operating documents Volume 3 , German Weather Service, December 2015, PDF 3.4 MB
• Observer manual (BHB) for weather reporting points of the synoptic climatological measurement and observation network , from regulations and operating documents Volume 3 , German Weather Service, December 2015, PDF 3 MB

Web links

Commons : Thermometer Hut  - Collection of Images, Videos and Audio Files

Individual evidence

1. ↑ ^{a b c} Weather and Climate - German Weather Service - Glossary - T - Thermometerhütte. Retrieved September 24, 2019 . 
2. ↑ ^{a b} Thermometer hut. Retrieved September 24, 2019 .