My GeoNetwork catalogue
ARKTIS 1991 - Cellular Convection over the Norwegian Sea: radiosoundings at the research vessel Valdivia and station Bear Island
The field experiment ARKTIS 1991 was an expedition planned by meteorologists of the Collaborative Research Centre 318 entitled "Climatically relevant processes in the system ocean-atmosphere-ice" which is funded by the German Research Foundation and established at the University of Hamburg. The expedition took place in the Norwegian Sea between Northern Norway, Bear Island and Jan Mayen during the period 17 February until 15 March 1991.
The main aim of the experiment was the investigation of cold air outbreaks from the surrounding Arctic ice sheets. During such weather episodes the air mass coming from the ice is rapidly modified over the water due to the contrasts in temperature, heat conduction, humidity and roughness between ice and water. This leads to the formation of a "new" boundary layer. Its depth, mean temperature and moisture increases with increasing distance from the ice edge mainly due to sensible and latent heat supply from the ocean.
The investigations of cold air outbreaks and Arctic stratus by scientists of the Collaborative Research Centre 318 began already three years before with the field experiment ARKTIS 1988 which took place in the area west of Spitsbergen in May 1988. ARKTIS 1991 is a continuation of this work under winterly weather conditions. ARKTIS 1991 was followed by the experiment ARKTIS 1993.
As in ARKTIS 1988 the research vessel Valdivia and the two research aircraft FALCON-20 of the DLR at Oberpfaffenhofen and DO-128 of the TU Braunschweig were at our disposal. Radiosonde measurements were performed on board of RV Valdivia and on Bear Island.
Simple
- Date (Publication)
- 2012-03-28
- Edition
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1
- Citation identifier
- UNI_HH_MI_ARKTIS1991
- Citation identifier
- doi:10.1594/WDCC/UNI_HH_MI_ARKTIS1991
http://www.mi.uni-hamburg.de/
- Name
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tar-File(s)
- Keywords
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arctic
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- Keywords
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buoy
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- Keywords
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ice
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- Keywords
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observational data
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- Keywords
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radiosonde
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- Keywords
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ship
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- Use limitation
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scientific use: For scientific use only
- Language
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eng; USA
))
- Begin date
- 1991-02-17
- End date
- 1991-03-15
- Distribution format
-
-
tar-File(s)
()
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tar-File(s)
()
- Transfer size
- 5
- OnLine resource
- https://www.wdc-climate.de/ui/entry?acronym=UNI_HH_MI_ARKTIS1991
- Hierarchy level
- collection
Completeness commission
- Name of measure
-
n/a
- Measure description
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None
Non quantitative attribute accuracy
- Name of measure
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n/a
- Measure description
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None
- Attribute description
- air_pressure
- Descriptor
-
air_pressure [CF-Standard Name]; unit: hPa
- Attribute description
- relative_humidity
- Descriptor
-
relative_humidity [CF-Standard Name]; unit: not filled
- Attribute description
- height
- Descriptor
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Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
- Attribute description
- wind_speed
- Descriptor
-
Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) The wind speed is the magnitude of the wind velocity.[CF-Standard Name]; unit: m s-1
- Attribute description
- specific_humidity
- Descriptor
-
"specific" means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.[CF-Standard Name]; unit: g kg-1
- Attribute description
- height
- Descriptor
-
Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
- Attribute description
- wind_from_direction
- Descriptor
-
Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) In meteorological reports, the direction of the wind vector is usually (but not always) given as the direction from which it is blowing (wind_from_direction) (westerly, northerly, etc.). In other contexts, such as atmospheric modelling, it is often natural to give the direction in the usual manner of vectors as the heading or the direction to which it is blowing (wind_to_direction) (eastward, southward, etc.) "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. [CF-Standard Name]; unit: degree
- Attribute description
- air_temperature
- Descriptor
-
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: not filled
- Attribute description
- wind_from_direction
- Descriptor
-
Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) In meteorological reports, the direction of the wind vector is usually (but not always) given as the direction from which it is blowing (wind_from_direction) (westerly, northerly, etc.). In other contexts, such as atmospheric modelling, it is often natural to give the direction in the usual manner of vectors as the heading or the direction to which it is blowing (wind_to_direction) (eastward, southward, etc.) "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. [CF-Standard Name]; unit: degree
- Attribute description
- air_pressure
- Descriptor
-
air_pressure [CF-Standard Name]; unit: hPa
- Attribute description
- relative_humidity
- Descriptor
-
relative_humidity [CF-Standard Name]; unit: not filled
- Attribute description
- air_temperature
- Descriptor
-
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: not filled
- Attribute description
- wind_speed
- Descriptor
-
Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) The wind speed is the magnitude of the wind velocity.[CF-Standard Name]; unit: m s-1
- Attribute description
- dew_point_temperature
- Descriptor
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Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity. [CF-Standard Name]; unit: not filled
- Attribute description
- specific_humidity
- Descriptor
-
"specific" means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.[CF-Standard Name]; unit: g kg-1
- Attribute description
- dew_point_temperature
- Descriptor
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Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity. [CF-Standard Name]; unit: not filled
- File identifier
- wdc-climate.de:2250976 XML
- Metadata language
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eng; USA
- Hierarchy level
- collection
- Hierarchy level name
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UNI_HH_MI_ARKTIS1991
- Date stamp
- 2011-06-22T14:51:00
- Metadata standard name
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ISO 19115
- Metadata standard version
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ISO 19115-2:2009
Overviews
Spatial extent
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