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Arctic Cloud Summer Expedition (ACSE): composite temperature, humidity and wind profiles and derived variables from the NCAS AMF radiosondes launched from Icebreaker Oden

Update Frequency: Not Planned
Latest Data Update: 2018-03-27
Status: Final
Online Status: ONLINE
Publication State: Citable
Publication Date: 2018-04-14
Download Stats: last 12 months
Dataset Size: 2 Files | 68MB


This dataset contains composite temperature, humidity and wind profiles, plus derived products, from the National Centre for Atmospheric Science's Atmospheric Measurement Facility (NCAS AMF) radiosondes launched from the Swedish Icebreaker Oden durning Arctic Cloud Summer Expedition (ACSE). ACSE took place in the Arctic during summer 2014. These measurements were used to complement a suite of other observations taken during the cruise. Those of the UK contribution, as well as selected other data, are available within the associated data collection in the Centre for Environmental Data Analysis (CEDA) archives. Other cruise data may be available in the NOAA ACSE and The Bolin Centre for Climate Research SWERUS (SWEdish-Russian-US) holdings - see online resources linked to this record.

These data consist of individual radiosonde profiles as 2D time/height fields, with all profiles interpolated onto a fixed vertical grid for ease of analysis/plotting across the outward (leg 1) and return (leg 2) parts of the expedition.

The vertical grid used is: 1m step to 5km, 10m step between 5 and 12 km, 50m step between 12 and 20 km. The data also includes derived variables (potential temperature etc).

Barbara Brooks (NCAS AMF) was responsible for the radiosonde ascents during the voyage and for the original data, whilst Ian Brookes prepared these data for archiving.

The Arctic Cloud Summer Expedition (ACSE) was a collaboration between the University of Leeds, the University of Stockholm, and NOAA-CIRES. ACSE aimed to study the response of Arctic boundary layer cloud to changes in surface conditions in the Arctic Ocean as a working package of the larger Swedish-Russian-US Investigation of Climate, Cryosphere and Carbon interaction (SWERUS-C3) Expedition in Summer 2014. This expedition was a core component to the overall SWERUS-C3 programme and was supported by the Swedish Polar Research Secretariat.

ACSE took place during a 3-month cruise of the Swedish Icebreaker Oden from Tromso, Norway to Barrow, Alaska and back over the summer of 2014. During this cruise ACSE scientists measured surface turbulent exchange, boundary layer structure, and cloud properties. Many of the measurements used remote sensing approaches - radar, lidar, and microwave radiometers - to retrieve vertical profiles of the dynamic and microphysical properties of the lower atmosphere and cloud.

The UK participation of ACSE was funded by the Natural Environment Research Council (NERC, grant: NE/K011820/1) and involved instrumentation from the Atmospheric Measurement Facility of the UK's National Centre for Atmospheric Science (NCAS AMF). This dataset collection contains data mainy from the UK contribution with some additional data from other institutes also archived to complement the suite of meteorological measurements.

Citable as:  Brooks, B.J.; Tjernström, M. (2018): Arctic Cloud Summer Expedition (ACSE): composite temperature, humidity and wind profiles and derived variables from the NCAS AMF radiosondes launched from Icebreaker Oden. Centre for Environmental Data Analysis, date of citation. doi:10.5285/61cd9961ecef43edadae89f842598f47.
Abbreviation: Not defined
Keywords: temperature, humidity, winds, profiles


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were collected, quality controlled and prepared for archiving by the instrument scientists before upload to the Centre for Environmental Data Analysis (CEDA) for long term archiving.

Data Quality:
Data quality were checked by the ACSE project data author before supplying to CEDA. Further information on quality may be available in related documentation.
File Format:
Data are CF-compliant NetCDF formatted.

Related Documents

No documents related to this record were found.

Process overview

This dataset was generated by instruments deployed on platforms as listed below.
Output Description


  • units: K
  • long_name: Dew point temperature (K)
  • var_id: DewPoint
  • units: %
  • long_name: Relative humidity (wrt ice) (%)
  • var_id: RelHumI
  • units: %
  • long_name: Relative humidity (wrt water) (%)
  • var_id: RelHum
  • units: K
  • var_id: Temperature
  • long_name: air temperature (K)
  • units: m
  • var_id: Height
  • long_name: altitude (m)
  • units: hPa
  • var_id: Pressure
  • long_name: atmospheric pressure (hPa)
  • units: K
  • long_name: equivalent potential temperature (K)
  • var_id: PotTempE
  • units: degrees
  • long_name: latitude (degrees)
  • var_id: SondeLat
  • units: degrees
  • long_name: longitude (degrees)
  • var_id: SondeLong
  • units: K
  • long_name: potential temperature (K)
  • var_id: PotTemp
  • var_id: time
  • units: days
  • long_name: time as decimal day of year
  • var_id: doy
  • units: s
  • long_name: time into sonde flight (s)
  • var_id: FlightTime
  • units: m/s
  • long_name: wind component to East (m/s)
  • var_id: WindU
  • units: m/s
  • long_name: wind component to North (m/s)
  • var_id: WindV
  • units: degrees
  • long_name: wind direction (degrees)
  • var_id: WindDirection
  • units: m/s
  • long_name: wind speed (m/s)
  • var_id: WindSpeed

Co-ordinate Variables

Temporal Range
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Geographic Extent