JET2000

General Info

Title:	JET2000
Type:	Data Entity
Sub-Type:	Measurement
Abbreviation:	JET2000
Publication State:	published
The publication state of this metadata: 'old' - for redundant records; 'working' - for new/in progress records; 'published' - for records approaching maturity, which may still change, but should be available via the discovery services; and 'Published' for mature records that are unlikely to change and should be available via the discovery services.

URI:	http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dataent_JET2000

Summary
A brief description of the data.

The African Easterly Jet (AEJ) is part of a climatic system which is of critical importance to African and global weather and climate, but is poorly observed and not well represented in model analyses. The Met Office Met Research flight (MRF) aircraft performed four flights, involving transects along and across the jet and the baroclinic zone, to make observations of unprecedented resolution for this part of the world. 110 dropsondes were dropped along the fight path.

Content
The actual data being described by this document. NB, in the case of data granules, this content may just be a reference to an ingested CSML or CDML file.

Introduction

The African Easterly Jet is part of a climatic system which is of critical importance to African and global weather and climate, but is poorly observed and not well represented in model analyses or forecasts. This project capitalised on the fact that in the summer of 2000 the MRF C-130 aircraft was stationed in Cape Verde, and was available to make observations over West Africa. Four flights were made, involving transects along and across the jet and the baroclinic zone, to make observations of unprecedented resolution for this part of the world. 110 dropsondes were dropped along the flight path.

The Objectives were:

African Easterly Jet: To provide detailed synoptic observations of the basic state over mainland West Africa. This will focus on the AEJ and its associated temperature, humidity and PV contrasts.
African Easterly Waves: To provide detailed synoptic observations of the AEWs over mainland tropical West Africa.

Operational analyses and Forecasts: To assess the impact on operational analyses and forecasts of having extra observations over mainland West Africa for the period of the experiment.

Restricted Data Access

JET2000 data are available to users subject to the terms and conditions of the JET2000 Data Protocol which aims at encouraging rapid dissemination of scientific results while simultaneously protecting the rights of individual scientists. For these reasons JET2000 data are not currently available to anonymous users through these WWW pages.

Initially, under the conditions of the data protocol, access to data is limited to JET2000 project participants only. If you think you are entitled to access the data you can apply for access to JET2000 data (we will then check your details before granting you access).

Data availability and file format

JET2000 has adopted NASA Ames Format for Data Exchange as its standard file format. Complete guidelines on the NASA Ames standard are available to assist data providers in formatting their data files. Files conforming to this standard can be submitted to the BADC archive using a WWW based tool.

You may browse the files in the data archive. To see the individual files you will need to have electronically accepted the JET2000 Data Protocol as part of the online dataset application. The files can be downloaded either via the WWW, or using ftp.

Documentation and Links to further information and references

General Information on NASA-Ames file format
Directory Structure
File naming conventions

Services for JET2000 participants

NASA-Ames File Checking - A WWW based tool for checking NASA Ames Files comply with the standard. All files submitted to the archive will be checked.
Submit a NASA-Ames file to the BADC JET2000 archive.
Submit a text file to the BADC JET2000 archive.

Several references are available for this project:

Parker, D.J.; Thorncroft, C.D.; Burton, R.R.; Diongue-Niang, A (2005) - Analysis of the African easterly jet, using aircraft observations from the JET2000 experiment, Quaterly Journal of Royal Meteorological Society, 131, pp.1461-1482.

Taylor, C.M.; Ellis, R.J.; Parker, D.J; Burton, R.R.; Thorncroft, C.D. (2003) - Linking boundary layer variability with convection: A case-study from JET2000, Quarterly Journal of Royal Meteorological Society, 129, pp. 2233-2253.

Thorncroft, C.D.; Parker, D.J., Burton, R.R.; Diop. M.; Ayers, J.H; Barjat, H.;Devereau, S.; Diongue, A.; Dumelow, R.; Kindred, D.R.; Price, N.M.; saloum, M.; Taylor , C.M.; Tompkins, A.M. (2003): The JET2000 Project: Aircraft observations of the African Easterly jet and African easterly Waves, Bulletin of the American Meteorological society, 84, pp. 337-351.

Citation

Date of citation

Who to contact

If you have queries about these pages or difficulties accessing JET2000 data at the BADC then you should contact BADC Support

For more details on the flight campaign contact Dr. Doug Parker (doug@env.leeds.ac.uk).

Lineage
Summary of the origins of the dataset, e.g.: "Dataset produced from NASA MODIS instrument on Terra and collected at the University of York's groundstation 1999-2003 and a copy provided to NEODC in June 2007".

Data collected by the Met Office research flight then prepared before transfer to BADC

Quality Statement
Description of the relative quality of the dataset.

Research data

Author
The principal author of the actual underlying data. Only one author can be specified per atom; if there are multiple authors, these should be specified as 'contributors'. NB, an atom MUST have an author specified.

Name	email
www.metoffice.gov.uk (Met Office)	enquiries@metoffice.gov.uk

Contributors
Any other authors of the actual underlying data. NB, the principal author should be specified in the 'Author' input field. Also, note, three contributors can be added at once; after these are added a further three may be specified - and so on.

Name	email
Douglas Parker, University of Leeds

Online References
Online references with a specific relationship to the data being described here. NB, if links are supplied they must be valid and include the transport protocol - e.g. 'http://blah.co.uk'. Also, note, three online references can be added at once; after these are added a further three may be specified - and so on.

Relation	Title
Apply for access	Apply for access to JET2000
Logo	JET2000 Logo
Download	JET2000 Data Directory

Parent Data Entity
Define the parent of this record. There should probably only be one parent, but this is not enforced.

No data specified at present

Sub Data Entities
Lists all entities which have the current entity as their parent.

None

Associated Deployments

Data Coverage
Summary of the temporal and spatial data coverage for the data.

Spatial coverage
Max Y: 8.0
Min X: -23.0	Max X 6.0
Min Y -19.0

Temporal coverage
Start Date:	2000-08-25
End Date:	2000-08-30

Spatial resolution

No spatial resoultion information available.

Vertical extent

No vertical extent information available.

Responsible Parties
Parties responsible for the metadata - e.g. data curator. Responsible parties can have a role specified to make their function clearer. Multiple responsible parties can be specified.

Role	Name	URI
Data Curator	badc.nerc.ac.uk	http://badc.nerc.ac.uk

Other Info
Other miscellaneous information. Note, update frequency relates to the update frequency of the underlying data, not the metadata.

Dataset language

English

Update frequency

notPlanned

Links and Services
	Downloadable XML version of this record

Not all information in this record may be rendered in this view. Please see the XML version for complete content

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