Measurement of declination at South Georgia 1700–1984
ABSTRACT Declination, or the difference between true and magnetic north, is one of the earliest parameters to have been measured systematically over the earth's surface. Values are available for South Georgia and the surrounding area from 1700 to the present. Observations were made from ship by...
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Cambridge University Press (CUP)
1987
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Online Access: | http://dx.doi.org/10.1017/s0032247400007531 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400007531 |
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crcambridgeupr:10.1017/s0032247400007531 2024-03-03T08:38:52+00:00 Measurement of declination at South Georgia 1700–1984 Simmons, D. A. 1987 http://dx.doi.org/10.1017/s0032247400007531 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400007531 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 23, issue 145, page 419-426 ISSN 0032-2474 1475-3057 General Earth and Planetary Sciences Ecology Geography, Planning and Development journal-article 1987 crcambridgeupr https://doi.org/10.1017/s0032247400007531 2024-02-08T08:38:48Z ABSTRACT Declination, or the difference between true and magnetic north, is one of the earliest parameters to have been measured systematically over the earth's surface. Values are available for South Georgia and the surrounding area from 1700 to the present. Observations were made from ship by Edmond Halley in 1700, by James Cook in 1775 and thereafter more frequently. Land-based observations were made during the First Polar Year in 1882–3, more recently by the British Antarctic Survey 1975–82. Declination has diminished from 23°E in 1700 to about 9°W in 1980, approximately 0.1° per annum. The modern observations suggest that the rate of change has slowed in recent years. Article in Journal/Newspaper Antarc* Antarctic British Antarctic Survey Polar Record Cambridge University Press Antarctic Polar Record 23 145 419 426 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
spellingShingle |
General Earth and Planetary Sciences Ecology Geography, Planning and Development Simmons, D. A. Measurement of declination at South Georgia 1700–1984 |
topic_facet |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
description |
ABSTRACT Declination, or the difference between true and magnetic north, is one of the earliest parameters to have been measured systematically over the earth's surface. Values are available for South Georgia and the surrounding area from 1700 to the present. Observations were made from ship by Edmond Halley in 1700, by James Cook in 1775 and thereafter more frequently. Land-based observations were made during the First Polar Year in 1882–3, more recently by the British Antarctic Survey 1975–82. Declination has diminished from 23°E in 1700 to about 9°W in 1980, approximately 0.1° per annum. The modern observations suggest that the rate of change has slowed in recent years. |
format |
Article in Journal/Newspaper |
author |
Simmons, D. A. |
author_facet |
Simmons, D. A. |
author_sort |
Simmons, D. A. |
title |
Measurement of declination at South Georgia 1700–1984 |
title_short |
Measurement of declination at South Georgia 1700–1984 |
title_full |
Measurement of declination at South Georgia 1700–1984 |
title_fullStr |
Measurement of declination at South Georgia 1700–1984 |
title_full_unstemmed |
Measurement of declination at South Georgia 1700–1984 |
title_sort |
measurement of declination at south georgia 1700–1984 |
publisher |
Cambridge University Press (CUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1017/s0032247400007531 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400007531 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic British Antarctic Survey Polar Record |
genre_facet |
Antarc* Antarctic British Antarctic Survey Polar Record |
op_source |
Polar Record volume 23, issue 145, page 419-426 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247400007531 |
container_title |
Polar Record |
container_volume |
23 |
container_issue |
145 |
container_start_page |
419 |
op_container_end_page |
426 |
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1792507342623866880 |