Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): Reference state data

Reference state data derived from the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA5 reanalysis for the nudging experiments of the Stratospheric Nudging And Predictable Surface Impacts (SNAPSI) project.

These reference states are used to nudge the stratosphere towards a specified evolution in the ensemble forecasts carried out by the SNAPSI project.

The data contain:

(a) lightly processed horizontal winds and temperatures from ERA5 spanning three case studies of sudden stratospheric warmings from 2018 to 2019 and

(b) climatological horizontal winds and temperatures.

Date (Publication): 2022-04-19T16:51:10

Date (Creation): 2022-04-19T16:51:10

Citation identifier: https://catalogue.ceda.ac.uk/uuid/540a4c4cdfa6497993bbfa7c3e3df51a

Citation identifier: NERC EDS Centre for Environmental Data Analysis / 540a4c4cdfa6497993bbfa7c3e3df51a

Citation identifier: doi / 10.5285/540a4c4cdfa6497993bbfa7c3e3df51a

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Unavailable	Hitchcock, Peter	Unavailable	Author
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Custodian
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	pointofContact
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Unknown

Update scope: Dataset

Keywords

stratosphere
arctic
antarctic
stratospheric polar vortex
SNAPSI
SNAP
APARC

GEMET - INSPIRE themes, version 1.0

atmospheric conditions

Access constraints: Other restrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: Other restrictions

Other constraints: Under the following licence https://creativecommons.org/licenses/by-sa/4.0/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 2010-01-01T00:00:00

End date: 2019-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
netCDF

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/540a4c4cdfa6497993bbfa7c3e3df51a	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/snap/data/post-cmip6/SNAPSI/SNAP/SNAPSI-REF	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5194/gmd-2021-394	Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): A Protocol for Investigating the Role of the Stratospheric Polar Vortex in Subseasonal to Seasonal Forecasts

OnLine resource

Protocol	Linkage	Name
	https://www.sparc-climate.org/2021/04/30/new-set-of-controlled-numerical-experiments-stratospheric-nudging-and-predictable-surface-impacts-snapsi/	New set of controlled numerical experiments: Stratospheric Nudging And Predictable Surface Impacts (SNAPSI)

Hierarchy level: Dataset

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Statement: Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).

The data is based on model-level output from ERA5, downloaded on a 1x1 degree horizontal grid. It has been lightly processed to compute the climatology and put in a format consistent with the SNAPSI data request.

Metadata

File identifier: 540a4c4cdfa6497993bbfa7c3e3df51a XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Date stamp: 2025-07-16T02:23:49

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Point of contact

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