Date (Creation)

2022-01-20

Identifier

http://data.bgs.ac.uk/id/dataHolding/13607898

Maintenance and update frequency

notApplicable notApplicable

GEMET - INSPIRE themes, version 1.0

• Geology

BGS Thesaurus of Geosciences

• NGDC Deposited Data
• Geomagnetic poles
• Geomagnetic fields

dataCentre

• NGDC Deposited Data

Keywords

• NERC_DDC

Access constraints

otherRestrictions Other restrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

otherRestrictions Other restrictions

Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Metadata language

EnglishEnglish

Topic category

• Geoscientific information

Begin date

2019-07-01

End date

2021-07-31

Distribution format

• text document ()

OnLine resource

Data

Hierarchy level

nonGeographicDataset Non geographic dataset

Other

non geographic dataset

Statement

The extreme forecast are prepared via the following procedure: 1. The magnetic field at the core-mantle boundary in 2019 is given by the CHAOS-7 geomagnetic field model 2. Using the optimisation methodology published in https://doi.org/10.3390/geosciences11080318, the flow that maximises the instantaneous rate-of-change in dipole latitude is derived. A root-mean-square flow speed of 13 km/yr at the core-mantle boundary is prescribed. Either unrestricted or equatorially symmetric flow geometries can be chosen. 3. The optimal flow is used to evolve the core-mantle boundary magnetic field in time by solving the induction equation via a second order AB time-stepping scheme. 4. After one year of evolution the optimal flow is calculated again from the resulting core-mantle boundary magnetic field 5. Repeat from 3.

File identifier

d6923465-3407-38e2-e054-002128a47908 XML

Metadata language

EnglishEnglish

Hierarchy level

nonGeographicDataset Non geographic dataset

Hierarchy level name

non geographic dataset

Date stamp

2025-07-28

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Dataset URI

http://data.bgs.ac.uk/id/dataHolding/13607898