This dataset comprises 12 hourly data of the envelope field of Northern hemispheric upper tropospheric (300 hPa) quasi-stationary waves calculated between1979-06-01 and 2015-08-31. The data were derived as part of the NERC funded ODYSEA project (Ocean Dynamics as Driver of Seasonal to Decadal European Atmospheric variability).
The envelope field in this dataset is a phase-independent measure of the wave amplitude and is derived from the meridional wind at 300 hPa of the ERA-Interim reanalysis data. To remove the faster transient signals a 15-day lowpass filter was applied to the meridional wind and then subtracted from a daily climatology. The envelope field allows for the identification of a slowly evolving stationary or slowly moving wave packet.
Full details of the method are described in the methodology statement that can be found in the docs section.
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Public data: access to these data is available to both registered and non-registered users.
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.
The data were produced as part of the NERC project Ocean Dynamics as Driver of Seasonal to Decadal European Atmospheric variability (ODYSEA; NE/M006107/1) and passed to the Centre for Environmental Data Analysis (CEDA) for archival and distribution.
The data were quality controlled by the project team and no quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
The data are provided in a single NetCDF file.
|Title||Calculation of the envelope field of Northern hemispheric upper tropospheric (300 hPa) quasi-stationary waves ( June 1979 to August 2015)|
|Abstract||The data are calculated from the meridional wind in ERA-Interim. A lowpass filter of 15-days is applied and the daily climatology (also lowpass filtered) subtracted. The method of Zimin et al. 2003 with a latitude dependent wavenumber range is then applied. The description of this method and the discussion about the climatology of quasi-stationary waves (this dataset) and their connection to European temperature anomalies and extreme events can be found in the attached methodology statement.|