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Core Angular Momentum Change Data: Excess length of day in milliseconds over standard day of 86400 seconds - Jackson et al. data

Entry ID: IERS_GGFC_SBC_CAM_LOD_JACKSON

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Summary

Abstract: [Adapted from http://www.astro.oma.be/SBC/data1.html]

Core angular momentum (CAM) is estimated by Jackson et al. using
modelling hypotheses applied to magnetic data. CAM is then
transformed into change in the length of day (LOD). Data is expressed
as excess length of day in milliseconds over a standard day of 86400
seconds.

Modelling hypotheses:
The zonal toroidal t_1^0 and t_3^0 ...

Related URL

Link: GET DATA

Description: Excess length of day in milliseconds over standard day of 86400
seconds data in ASCII format

Link: VIEW PROJECT HOME PAGE

Description: IERS GGFC Special Bureau for the Core home page.

Data Set Citation

Dataset Originator/Creator: Jackson, A., J. Bloxham and D. Gubbins

Dataset Title: Data of Core Angular Momentum Changes

Dataset Publisher: Special Bureau for the Core, GGFC, IERS

Data Presentation Form: Table

Online Resource: http://www.astro.oma.be/SBC/data1.html

Parent DIF

This data set description is a member of a collection. The collection is described in
IERS_GGFC_SBC_CAM_LOD

Temporal Coverage

Start Date: 1840-01-01

Stop Date: 1990-12-31

Location Keywords

SOLID EARTH > CORE

Data Resolution

Temporal Resolution: 1 year

Science Keywords

SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > ROTATIONAL MOTION/VARIATIONS

ISO Topic Category

GEOSCIENTIFIC INFORMATION

Project

SBC > Special Bureau for the Core, GGFC, IERS

Access Constraints No constraints

Use Constraints Please cite data provider.

Reference to be mentioned when data are used:
Jackson A., 1997. Time-Depency of geostrophic core surface
motions, Phys. Earth Planet. Int., 103, pp 293-311.

Ancillary Keywords

CORE

ANGULAR MOMENTUM

Data Set Progress

COMPLETE

Data Center

Global Geophysical Fluids Center, International Earth Rotation Service

Data Center URL: http://bowie.gsfc.nasa.gov/ggfc/

Data Center Personnel
Name: BENJAMIN F. CHAO Email: chao at bowie.gsfc.nasa.gov Contact Address: Space Geodesy Branch, Code 926 NASA's Goddard Space Flight Center (GSFC) City: Greenbelt Province or State: Maryland Postal Code: 20771 Country: USA

Distribution

Distribution Media: Online (HTTP)

Distribution Format: ASCII

Fees: None

Personnel

GENE R. MAJOR

Role: DIF AUTHOR

Email: gsfc-gcmduso at mail.nasa.gov

ANDREW JACKSON

Role: INVESTIGATOR

Contact Address:

Department of Earth Sciences

University of Leeds

Leeds LS2 9JT

JEREMY BLOXHAM

Role: INVESTIGATOR

Phone: (617) 495-9517

Fax: (617) 495-7660

Email: jeremy_bloxham at harvard.edu

Contact Address:

Department of Earth and Planetary Sciences

Harvard University

20 Oxford Street

City: Cambridge

Province or State: MA

Postal Code: 02138

Country: USA

DAVID GUBBINS

Role: INVESTIGATOR

Contact Address:

Department of Earth and Planetary Sciences

Harvard University

20 Oxford Street

City: Cambridge

Province or State: MA

Postal Code: 02138

Country: USA

Publications/References

Reference to be mentioned when data are used: Jackson A., 1997. Time-Depency of geostrophic core surface motions, Phys. Earth Planet. Int., 103, pp 293-311.

Related reference:
Bloxham J. & Jackson A., 1992. Time-dependent mapping of the magnetic field at the core-mantle boundary, J. Geophys. Res., 97, pp 19537-19563.

Creation and Review Dates

DIF Creation Date: 2003-10-16

Last DIF Revision Date: 2003-10-17

Future DIF Review Date: 2004-10-16

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