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HOAPS 4.0 - Hamburg Ocean Atmosphere Parameters and Fluxes Climatology

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UNRESTRICTED

This data set is only available for a restricted user group, please contact us if you want to access these data.

RESTRICTED only accessable in CEN/MPI network or via CliSAP login What does that mean?

View data via LAS

Use data via OPeNDAP

Access data via file system: /data/icdc/atmosphere/hoaps/

 

Description

The Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data (HOAPS) set is a climatology derived from satellite data of the freshwater budget, near surface wind and humidity, latent heat flux and vertically integrated water vapor over the ice-free oceans. HOAPS 4.0 extends (compared to v3.2) the data coverage from the Special Sensor Microwave / Imager (SSM/I) period to the Special Sensor Microwave Imager and Sounder (SSMIS). The variables are derived from SSM/I and SSMIS passive microwave radiometers, with the exception of the sea-surface temperature, which is taken from the Reynolds data set. The data set includes instantaneous 6-hourly as well as monthly averaged data and is based on a inter-sensor difference calibrated SSM/I-SSMIS FCDR of brightness temperatures. For more information we refer to the Product User Guide, the ATBD and the Validation Report.

All intellectual property rights of the CM SAF products belong to EUMETSAT. The use of these
products is granted to every interested user, free of charge. If you wish to use these products,
EUMETSAT's copyright credit must be shown by displaying the words "copyright (year)
EUMETSAT" on each plot which is created from the product. For citing the used data in a paper
please refer to publications of the data record if applicable and use the doi.

Upgrade of the HOAPS data set from v3.2 to v4.0 took place at ICDC on July 27, 2018.

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Parameters

Name Unit Code
Wind speed at 10m height m / s wind, SWS
Near surface specific humidity g / kg hair, NSH
Precipitation mm / day rain, PRE
Latent heat flux W / m² late, LHF
Evaporation mm / day evap, EVA
Fresh water flux mm / day budg, EMP
Vertically integrated water vapour kg / m² wvpa, HTW

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Coverage, spatial and temporal resolution

Period and temporal resolution: 

  • 07/1987 to 12/2014
  • Monthly mean, 6-hourly composite

Coverage and spatial resolution:

  • quasi-global, over the oceans
  • Spatial resolution: 0.5° x 0.5°, cartesian grid
  • Geographic longitude: -180°E to 180°E
  • Geographic latitude: -80°N to 80°N
  • Dimension: 720 columns x 320 rows
  • Altitude: 0.0 m

Format:

  • NetCDF

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Data quality

The data set contains a number of error and uncertainty information such as

  • standard deviation [monthly data only]
  • sampling error (a function of satellite overpass density and number of satellites used) [monthly data only]
  • systematic uncertainty (as a result of standard error propagation)
  • random uncertainty (as a result of standard error propagation)

Information about how these are retrieved can be found in the ATBD.

In addition to the parameters the data sets also contain

  • number of days with observations [monthly data only]
  • observation time [6-hourly data only]
  • number of observations
  • satellite bit mask (indicating which satellites are used)

A few final notes:

- The product is only derived over sea surfaces; no geophysical parameter is observed within 50 km of any coastline and the sea-ice margin.

- All parameters except precipitation are NOT retrieved in presence of strong scattering (such as caused by strong precipitation)

- Useful information about the uncertainties, assumptions and limitations can be found in the ATBD, and the validation report.

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Contact

User Help Desk at CM-SAF
http://www.cmsaf.eu/EN/Service/UHD/UHD_node.html
email: contact.cmsaf (at) dwd.de

Stefan Kern
ICDC, CEN, University of Hamburg
email: stefan.kern (at) uni-hamburg.de

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References

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Data citation

Andersson, Axel; Graw, Kathrin; Schröder, Marc; Fennig, Karsten; Liman, Julian; Bakan, Stephan; Hollmann, Rainer; Klepp, Christian (2017): Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data - HOAPS 4.0, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/HOAPS/V002, http://dx.doi.org/10.5676/EUM_SAF_CM/HOAPS/V002

All intellectual property rights of the CM SAF products belong to EUMETSAT. The use of these
products is granted to every interested user, free of charge. If you wish to use these products,
EUMETSAT's copyright credit must be shown by displaying the words "copyright (year)
EUMETSAT" on each plot which is created from the product. For citing the used data in a paper
please refer to publications of the data record if applicable and use the doi.

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