GEOMAGNETIC PALEOINTENSITY VARIATION WITH A 100 KYR QUASI-PERIOD
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dc.contributor.author | Yokoyama Y. | |
dc.contributor.author | Yamazaki T. | |
dc.date.accessioned | 2021-01-24T05:12:18Z | |
dc.date.available | 2021-01-24T05:12:18Z | |
dc.date.issued | 2000 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=367736 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2000, 181, 1-2, 7-14 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23643 | |
dc.description.abstract | We analyzed records of geomagnetic field intensity (paleointensity) during the last 700 kyr in five sediment cores from a wide region of the Pacific Ocean. A global paleointensity variation with a 100 kyr quasi-period was successfully extracted using the wavelet transform. Because the variation does not correlate with that of magnetic properties of the sediments, it originated from a change in the geomagnetic field. The 100 kyr quasi-period of the geomagnetic field is close to the timescales of eccentricity, one of the Earth's orbital elements, and of the glacial-interglacial cycle of the late Quaternary paleoclimate. In particular, there is a correlation between the variations of the geomagnetic field intensity and climate with an 18 kyr time lag. While the geodynamo has widely been thought to be a self-sustained system, our results support the possibility of an external energy supply of the variation through orbital forcing or climate change. | |
dc.subject | MAGNETIC FIELD | |
dc.subject | PALEOINTENSITY | |
dc.subject | SECULAR VARIATIONS | |
dc.subject | ECCENTRICITY | |
dc.subject | ORBITAL FORCING | |
dc.subject | CLIMATE CHANGE | |
dc.title | GEOMAGNETIC PALEOINTENSITY VARIATION WITH A 100 KYR QUASI-PERIOD | |
dc.type | Статья |
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