Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Takesi Yukutake"'
Autor:
Takesi Yukutake, Hisayoshi Shimizu
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-20 (2018)
Abstract The geomagnetic field is comprised of drifting and standing fields. The drifting field has two remarkable features. One is predominance of sectorial harmonics when the field is expressed in a spherical harmonic series, and the other is unifo
Externí odkaz:
https://doaj.org/article/b79e55126fde49fe88af9657b25be186
Autor:
Hisayoshi Shimizu, Takesi Yukutake
Publikováno v:
Physics of the Earth and Planetary Interiors. 283:122-130
It is widely believed that in the Pacific region the geomagnetic secular variation is low and that the non-dipole field is weak. This is also known as hemispherical asymmetry between the Pacific and the Atlantic hemispheres, representing the low secu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1af0ca2b56108c5a1f436f9c24b91ad
https://doi.org/10.1016/j.pepi.2018.08.008
https://doi.org/10.1016/j.pepi.2018.08.008
On the latitude dependence of drift velocity of the geomagnetic main field and its secular variation
Autor:
Takesi Yukutake, Hisayoshi Shimizu
Publikováno v:
Physics of the Earth and Planetary Interiors. 257:28-39
There is an apparent difference in the westward drift between the geomagnetic main field and its time derivative, secular variation. The drift velocity of the main field is about 0.2°/year, definitely lower than that of the secular variation, 0.3°/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31c105d4f923fdf957a0efa266252961
https://doi.org/10.1016/j.pepi.2016.05.002
https://doi.org/10.1016/j.pepi.2016.05.002
Autor:
Hisayoshi Shimizu, Takesi Yukutake
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-20 (2018)
The geomagnetic field is comprised of drifting and standing fields. The drifting field has two remarkable features. One is predominance of sectorial harmonics when the field is expressed in a spherical harmonic series, and the other is uniform drift
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4b216c5f2b8114b88a7fdaac7988ffd
https://doi.org/10.1186/s40623-018-0908-3
https://doi.org/10.1186/s40623-018-0908-3
Autor:
Takesi Yukutake, Hisayoshi Shimizu
Publikováno v:
Physics of the Earth and Planetary Interiors. 248:63-72
Based on the field model by Jackson et al. (2000), we reanalyzed the data of historical times and decomposed the geomagnetic field into drifting and standing fields. It has been confirmed that the results are consistent with the earlier analyses. Whe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49b52475c9774dd90b25d69b896f91ab
https://doi.org/10.1016/j.pepi.2015.08.003
https://doi.org/10.1016/j.pepi.2015.08.003
Autor:
Takesi Yukutake
Publikováno v:
Physics of the Earth and Planetary Interiors. 121:103-137
This paper attempts to estimate the temperature of the deep interior of the early Earth. The initial temperature cannot be too high or too low in order to realize the present-day thermal state, such as the surface heat flow and the inner core size. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08fd852d7ee29a3ed9a9bc1c14bb145a
https://doi.org/10.1016/s0031-9201(00)00163-1
https://doi.org/10.1016/s0031-9201(00)00163-1
Publikováno v:
Tectonophysics. 299:317-331
Earth's resistivity variation has been continuously recorded in a vault at Aburatsubo, central Japan, since 1967. In the previous works, tidal, coseismic, and precursory resistivity variations were reported, which were explained by strain-induced cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0006cce33a856828e922e87e1622edb
https://doi.org/10.1016/s0040-1951(98)00210-8
https://doi.org/10.1016/s0040-1951(98)00210-8
Autor:
Takesi Yukutake
Publikováno v:
Physics of the Earth and Planetary Interiors. 108:1-13
A question whether thermal convection occurs in the solid inner core or not is not yet completely solved. In this paper the temperature profile in the core is examined when the solid core grows, being cooled from the surface. In order for convection
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2323b011175c3e945559dfa386125d32
https://doi.org/10.1016/s0031-9201(98)00097-1
https://doi.org/10.1016/s0031-9201(98)00097-1
Autor:
Yukiko Yokoyama, Takesi Yukutake
Publikováno v:
Structure and Dynamics of Earth's Deep Interior
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a71ad65483053a2dd5185f8c22b207db
https://doi.org/10.1029/gm046p0095
https://doi.org/10.1029/gm046p0095
Autor:
Graham Heinson, Hiroaki Toh, Hisashi Utada, Jiro Segawa, Takesi Yukutake, L. K. Law, Antony White, Yozo Hamano
Publikováno v:
Marine Geophysical Researches. 15:77-100
From July to November 1988, a major electromagnetic (EM) experiment, known as EMRIDGE, took place over the southern end of the Juan de Fuca Ridge in the northeast Pacific. It was designed to complement the previous EMSLAB experiment which covered the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22b38cbcef67746caa8295cf401b7aaa
https://doi.org/10.1007/bf01204130
https://doi.org/10.1007/bf01204130