My GeoNetwork catalogue
BASIS 1998 - Baltic Air Sea Ice Study 1998: meteorological measurements of the research aircraft Falcon and radiosoundings at the research vessel Aranda and 3 land stations
The field experiment BASIS 1998 took place in the Gulf of Bothnia in the Baltic Sea in a boundary zone between the open sea and the ice-covered sea from 16 February to 7 March, 1998. BASIS 1998 as well as the field experiments BASIS 2001 and ALKOR 2000 and 2001 are part of the research compound BALTIMOS (BALTic sea Integrated MOdel System). BALTIMOS in turn is part of the Baltic Sea Experiment (BALTEX).
The overall objective of all eight field experiments (ALKOR and BASIS) was to collect a comprehensive data set suited to validate the coupled model system BALTIMOS for the Baltic Sea region. The observations mainly focus on:
- the atmospheric boundary layer structure and processes and the air-sea-ice interaction over areas with inhomogeneous sea ice cover
- the atmospheric boundary layer structure over open water under different synoptic conditions such as cold-air advection, warm-air advection or frontal passages.
Observations during BASIS 2001 were made at three land stations and the Finnish research vessel Aranda. All stations performed radiosonde measurements. The German research aircraft Falcon had six flight missions with measurements of meteorological parameters and turbulent fluxes.
In addition to the published datasets several other measurements were performed during the experiment. Corresonding datasets will be published in the near future and are available on request.
Details about all used platforms and sensors and all performed measurements are listed in the fieldreport.
The following datasets are available on request: meteorological stations Kokkola, Umea, Merikarvia, ground data at RV Aranda
Simple
- Date (Publication)
- 2012-03-27
- Edition
-
1
- Citation identifier
- UNI_HH_MI_BASIS1998
- Citation identifier
- doi:10.1594/WDCC/UNI_HH_MI_BASIS1998
http://www.mi.uni-hamburg.de/
- Name
-
tar-File(s)
- Keywords
-
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Baltic Sea
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- Keywords
-
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aircraft
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- Keywords
-
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aircraft measurement
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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
- 1998-02-17
- End date
- 1998-03-06
- Distribution format
-
-
tar-File(s)
()
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tar-File(s)
()
- Transfer size
- 49
- OnLine resource
- https://www.wdc-climate.de/ui/entry?acronym=UNI_HH_MI_BASIS1998
- Hierarchy level
- collection
Completeness commission
- Name of measure
-
n/a
- Measure description
-
None
Non quantitative attribute accuracy
- Name of measure
-
n/a
- Measure description
-
None
- Attribute description
- dew_point_temperature
- Descriptor
-
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
- 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
- height
- Descriptor
-
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
- upward_air_velocity
- Descriptor
-
vertical wind velocity A velocity is a vector quantity. "Upward" indicates a vector component which is positive when directed upward (negative downward). Upward air velocity is the vertical component of the 3D air velocity vector. [CF-Standard Name]; unit: m s-1
- Attribute description
- northward_wind
- Descriptor
-
"Northward" indicates a vector component which is positive when directed northward (negative southward). 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.) [CF-Standard Name]; unit: m s-1
- Attribute description
- humidity_mixing_ratio
- Descriptor
-
Humidity mixing ratio of a parcel of moist air is the ratio of the mass of water vapor to the mass of dry air. [CF-Standard Name]; unit: g kg-1
- Attribute description
- air_pressure
- Descriptor
-
air_pressure [CF-Standard Name]; unit: hPa
- 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
- upwelling_longwave_flux_in_air
- Descriptor
-
"longwave" means longwave radiation. Upwelling radiation is radiation from below. It does not mean "net upward". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: W m-2
- 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
- upward_latent_heat_flux_in_air
- Descriptor
-
"Upward" indicates a vector component which is positive when directed upward (negative downward). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.[CF-Guidelines for construction] [CF-Standard Name]; unit: W m-2
- Attribute description
- surface_temperature
- Descriptor
-
The surface called "surface" means the lower boundary of the atmosphere. The surface temperature is the (skin) temperature at the interface, not the bulk temperature of the medium above or below. [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_temperature
- Descriptor
-
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [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
- relative_humidity
- Descriptor
-
relative_humidity [CF-Standard Name]; unit: not filled
- Attribute description
- dew_point_temperature
- Descriptor
-
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
- downwelling_shortwave_flux_in_air
- Descriptor
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downwelling_shortwave_flux_in_air [CF-Standard Name]; unit: W m-2
- Attribute description
- longitude
- Descriptor
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longitude [CF-Standard Name]; unit: degree_east
- Attribute description
- air_pressure_at_sea_level
- Descriptor
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sea_level means mean sea level, which is close to the geoid in sea areas. Air pressure at sea level is the quantity often abbreviated as MSLP or PMSL.[CF-Standard Name]; unit: hPa
- Attribute description
- relative_humidity
- Descriptor
-
relative_humidity [CF-Standard Name]; unit: not filled
- Attribute description
- height
- Descriptor
-
Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
- Attribute description
- eastward_wind
- Descriptor
-
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). 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.) [CF-Standard Name]; unit: m s-1
- Attribute description
- upwelling_shortwave_flux_in_air
- Descriptor
-
"shortwave" means shortwave radiation. Upwelling radiation is radiation from below. It does not mean "net upward". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: W m-2
- Attribute description
- height
- Descriptor
-
Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
- Attribute description
- air_pressure
- Descriptor
-
air_pressure [CF-Standard Name]; unit: hPa
- 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
- latitude
- Descriptor
-
latitude [CF-Standard Name]; unit: degree_north
- 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
- downwelling_longwave_flux_in_air
- Descriptor
-
downwelling_longwave_flux_in_air [CF-Standard Name]; unit: W m-2
- Attribute description
- time
- Descriptor
-
time [CF-Standard Name]; unit: s
- Attribute description
- upward_sensible_heat_flux_in_air
- Descriptor
-
"Upward" indicates a vector component which is positive when directed upward (negative downward). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.[CF-Guidelines for construction] [CF-Standard Name]; unit: W m-2
- File identifier
- wdc-climate.de:2250979 XML
- Metadata language
-
eng; USA
- Hierarchy level
- collection
- Hierarchy level name
-
UNI_HH_MI_BASIS1998
- Date stamp
- 2011-06-22T14:51:24
- Metadata standard name
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ISO 19115
- Metadata standard version
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ISO 19115-2:2009
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