Envelope field of Northern hemispheric upper tropospheric (300 hPa) quasi-stationary waves (June 1979 to August 2015)
Dataset
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2018-04-20
Download Stats: last 12 months
 
Abstract

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.

Citable as:  Wolf, G.; Brayshaw, D.; Klingaman, N.; Czaja, A. (2018): Envelope field of Northern hemispheric upper tropospheric (300 hPa) quasi-stationary waves (June 1979 to August 2015). Centre for Environmental Data Analysis, date of citation. doi:10.5285/c0c7998800414e46b6823dc75751bb4c. http://dx.doi.org/10.5285/c0c7998800414e46b6823dc75751bb4c
Keywords:  quasi-stationary waves, wave packet, NE/M006107/1
Previous Info:
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Access rules:
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.
Abbreviation:
Not defined
Data lineage:

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.

Data Quality:
The data were quality controlled by the project team and no quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
File Format:
The data are provided in a single NetCDF file.
Process overview
This dataset was generated by the computation detailed below.

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.
Input Description
None
Output Description
None
Software Reference
None
No variables found
There are no comments about this dataset
Temporal Range
1976-06-01T00:00:00
2015-12-31T12:00:00
Geographic Extent

  90.0000°  
-180.0000°     180.0000°
  0.0000°  
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