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Dataset

 

Arctic Cloud Summer Expedition (ACSE): wave statistics, wave spectra and raw buoy displacement data from the University of Leeds Datawell DWR-G4-Waverider buoy deployed from the Icebreaker Oden

Update Frequency: Not Planned
Status: Final
Online Status: ONLINE
Publication State: Citable
Publication Date: 2018-12-13
Download Stats: last 12 months

Abstract

This dataset contains derived wave statistics, directional wave spectra and raw buoy displacement data from the University of Leeds Datawell DWR-G4-Waverider buoy deployed 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.

The buoy was deployed on numerous occasions during the voyage, including multiple deployments per day (the deployment number during the day is given in the filename following the date of deployment). However, some deployments are omitted from the archive where significant problems with the raw data were found (failure to obtain GPS lock; too-short a deployment, etc.). The deployment number for the day has been maintained to coincide with the buoy's deployment logs. Data are truncated to remove the deployment and recovery. No further quality control has been applied to the data.

The raw displacement timeseries data contains raw buoy displacements (up, north, west) from which the spectra were calculated. The spectra were calculated as 10-minute averages. The methodology used is detailed within the files, but include both raw (quite noisy) and smoothed spectra.

The overall wave statistics file contains all wave statistics data obtained during the voyage (significant wave height, spectral peak details, etc, along with the spectral moments from which the stats are calculated). These are all given for each spectrum as a whole, and partitioned into windsea and swell components. References to the techniques used to produce these statistics are given in the file.

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, I.; Salisbury, D.J. (2018): Arctic Cloud Summer Expedition (ACSE): wave statistics, wave spectra and raw buoy displacement data from the University of Leeds Datawell DWR-G4-Waverider buoy deployed from the Icebreaker Oden. Centre for Environmental Data Analysis, date of citation. doi:10.5285/72d29f16054d4a8ca056796a8c5d6e3d. http://dx.doi.org/10.5285/72d29f16054d4a8ca056796a8c5d6e3d
Abbreviation: Not defined
Keywords: waverider, waves, sea state, wind sea, swell, wave spectra, directional spectra,

Details

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: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. 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:
Waverider buoy data were truncated to remove the deployment and recovery phase of the readings only. Data from other deployments not in the archive as a result of issues with the deployment (e.g. too short, failure to lock onto a GPS signal etc)
File Format:
Data are netCDF formatted.

Process overview

This dataset was generated by instruments deployed on platforms as listed below.
Output Description None
  • units: degrees
  • long_name: direction of spectral peak (swell)
  • var_id: dirp_swell
  • names: direction of spectral peak (swell)
  • long_name: direction of spectral peak (total spectrum)
  • var_id: dirp
  • units: degrees
  • names: direction of spectral peak (total spectrum)
  • long_name: direction of spectral peak (wind sea)
  • var_id: dirp_windsea
  • units: degrees
  • names: direction of spectral peak (wind sea)
  • var_id: S
  • units: m2 s deg-1
  • long_name: directional wave spectral energy density (m2 s deg-1)
  • names: directional wave spectral energy density (m2 s deg-1)
  • units: m
  • long_name: displacement to north (m)
  • var_id: displacement_north
  • names: displacement to north (m)
  • units: m
  • long_name: displacement to west (m)
  • var_id: displacement_west
  • names: displacement to west (m)
  • units: m
  • long_name: displacment vertically (m)
  • var_id: displacement_up
  • names: displacment vertically (m)
  • var_id: Sp_swell
  • units: m2 s deg-1
  • long_name: energy density at spectral peak (swell)
  • names: energy density at spectral peak (swell)
  • long_name: energy density at spectral peak (total spectrum)
  • var_id: Sp
  • units: m2 s deg-1
  • names: energy density at spectral peak (total spectrum)
  • long_name: energy density at spectral peak (wind sea)
  • var_id: Sp_windsea
  • units: m2 s deg-1
  • names: energy density at spectral peak (wind sea)
  • units: m2 s
  • long_name: first negative spectral moment (swell)
  • var_id: mn1_swell
  • names: first negative spectral moment (swell)
  • units: m2 s
  • long_name: first negative spectral moment (total spectrum)
  • var_id: mn1
  • names: first negative spectral moment (total spectrum)
  • units: m2 s
  • long_name: first negative spectral moment (wind sea)
  • var_id: mn1_windsea
  • names: first negative spectral moment (wind sea)
  • units: m2 s-1
  • long_name: first spectral moment (swell)
  • var_id: m1_swell
  • names: first spectral moment (swell)
  • units: m2 s-1
  • long_name: first spectral moment (total spectrum)
  • var_id: m1
  • names: first spectral moment (total spectrum)
  • var_id: m1_windsea
  • units: m2 s-1
  • long_name: first spectral moment (wind sea)
  • names: first spectral moment (wind sea)
  • units: m2 s-4
  • long_name: fourth spectral moment (swell)
  • var_id: m4_swell
  • names: fourth spectral moment (swell)
  • units: m2 s-4
  • long_name: fourth spectral moment (total spectrum)
  • var_id: m4
  • names: fourth spectral moment (total spectrum)
  • units: m2 s-4
  • long_name: fourth spectral moment (wind sea)
  • var_id: m4_windsea
  • names: fourth spectral moment (wind sea)
  • long_name: latitude (degrees)
  • var_id: lat
  • units: degrees
  • names: latitude (degrees)
  • long_name: longitude (degrees)
  • var_id: long
  • units: degrees
  • names: longitude (degrees)
  • units: s
  • long_name: mean period (swell)
  • var_id: Tm_swell
  • names: mean period (swell)
  • units: s
  • long_name: mean period (total spectrum)
  • var_id: Tm
  • names: mean period (total spectrum)
  • units: s
  • var_id: Tm_windsea
  • long_name: mean period (wind sea)
  • names: mean period (wind sea)
  • var_id: U10dir
  • units: degrees
  • long_name: mean wind direction at 10m
  • names: mean wind direction at 10m
  • units: m s-1
  • var_id: U10
  • long_name: mean wind speed at 10m
  • names: mean wind speed at 10m
  • units: s
  • long_name: mean zero crossing period (swell)
  • var_id: Tz_swell
  • names: mean zero crossing period (swell)
  • units: s
  • long_name: mean zero crossing period (total spectrum)
  • var_id: Tz
  • names: mean zero crossing period (total spectrum)
  • units: s
  • long_name: mean zero crossing period (wind sea)
  • var_id: Tz_windsea
  • names: mean zero crossing period (wind sea)
  • units: s
  • var_id: Tp_swell
  • long_name: period of spectral peak (swell)
  • names: period of spectral peak (swell)
  • units: s
  • long_name: period of spectral peak (total spectrum)
  • var_id: Tp
  • names: period of spectral peak (total spectrum)
  • units: s
  • var_id: Tp_windsea
  • long_name: period of spectral peak (wind sea)
  • names: period of spectral peak (wind sea)
  • var_id: mn2_swell
  • units: m2 s2
  • long_name: second negative spectral moment (swell)
  • names: second negative spectral moment (swell)
  • long_name: second negative spectral moment (total spectrum)
  • var_id: mn2
  • units: m2 s2
  • names: second negative spectral moment (total spectrum)
  • var_id: mn2_windsea
  • units: m2 s2
  • long_name: second negative spectral moment (wind sea)
  • names: second negative spectral moment (wind sea)
  • var_id: m2_swell
  • units: m2 s-2
  • long_name: second spectral moment (swell)
  • names: second spectral moment (swell)
  • long_name: second spectral moment (total spectrum)
  • var_id: m2
  • units: m2 s-2
  • names: second spectral moment (total spectrum)
  • units: m2 s-2
  • long_name: second spectral moment (wind sea)
  • var_id: m2_windsea
  • names: second spectral moment (wind sea)
  • units: m
  • long_name: significant wave height (swell)
  • var_id: Hs_swell
  • names: significant wave height (swell)
  • units: m
  • long_name: significant wave height (total spectrum)
  • var_id: Hs
  • names: significant wave height (total spectrum)
  • units: m
  • long_name: significant wave height (wind sea)
  • var_id: Hs_windsea
  • names: significant wave height (wind sea)
  • long_name: smoothed directional wave spectral energy density (m2 s deg-1)
  • var_id: S_smooth
  • units: m2 s deg-1
  • names: smoothed directional wave spectral energy density (m2 s deg-1)
  • long_name: third spectral moment (swell)
  • var_id: m3_swell
  • units: m2 s-3
  • names: third spectral moment (swell)
  • long_name: third spectral moment (total spectrum)
  • var_id: m3
  • units: m2 s-3
  • names: third spectral moment (total spectrum)
  • long_name: third spectral moment (wind sea)
  • var_id: m3_windsea
  • units: m2 s-3
  • names: third spectral moment (wind sea)
  • var_id: time
  • units: days
  • long_name: time as decimal day of year
  • var_id: doy
  • names: time as decimal day of year
  • long_name: zeroth spectral moment (swell)
  • var_id: m0_swell
  • units: m2
  • names: zeroth spectral moment (swell)
  • long_name: zeroth spectral moment (total spectrum)
  • var_id: m0
  • units: m2
  • names: zeroth spectral moment (total spectrum)
  • long_name: zeroth spectral moment (wind sea)
  • var_id: m0_windsea
  • units: m2
  • names: zeroth spectral moment (wind sea)

Co-ordinate Variables

Coverage
Temporal Range
Start time:
2014-09-19T12:15:00
End time:
2014-09-24T23:05:00
Geographic Extent

 
85.2300°
 
-180.0000°
 
180.0000°
 
69.6600°