Kawai and Hirookahave examined the results of archaeomagnetic observations, and those of secular variation, to investigate the movement of the geomagnetic dipole field during the past 2,000 yr. They found a wob
G. A.: Evolutionary processes and reversals of the Earth's magnetic field. Nature, 217, 46-47, 1968.Evolutionary processes and reversals of the earth’s magnetic field - A - 1968Harrison, C. G. A., 1968. Evolutionary processes and reversals of the Earth's magnetic field, Nature, 217,...
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Earth's magnetic field is unstable. Not only does it vary in intensity, but from time to time it flips, with the poles reversing sign. Much of this behaviour remains a mystery, but a combination of geomagnetic observations with theoretical studies has been providing enlightenment. This is a ...
命运的逆转mìng yùn de nì zhuǎn reversal of fortune 颠倒diān dǎo perversion; reversal; bottom up; upside down; overturn 地磁场dì cí chǎng geomagnetic field; terrestrial magnetic field; (earth) magnetic field 返航fǎn háng course reversal; go on the homeward voyage; make a return voy...
While it is well established that the Earth's magnetic field is generated by a self sustaining dynamo that reversed its polarity at irregular intervals in the geological past, the very mechanisms causing field reversals remain obscure. Paleomagnetic reconstructions of polarity transitions have been essen...
From his observations Brunhes then concluded that the Earth's magnetic field must have reversed its polarity in the past. This is the first documented suggestion for reversals of the geomagnetic field. Although later accepted by other scientists, at the ti ... 展开 ...
Oceanographic surveys in the 1950's revealed zebra-like magnetic stripes on the ocean floor. A decade later scientistis deduced they were the product of pole reversal of the Earth's magnetic field. These events are apparently innocuous. There is no credible evidence of mass extinctions associated...
Most of these parameters, however, are well synchronized over the last several decades and do not appear to be a significant factor in climate change. Decadal to millennial scale variations in the surface temperature of the earth can be obtained through proxy records. Millennial scale global and ...
Magnetic PolesPaleomagnetismGeophysicsVolcanoesDiscusses paleomagnetic records of the path of the pole during reversals of the Earth's magnetic field and the use of these records as a test of the hypothesis that dipolar or low-order axisymmetric components of the field dominate during reversals. What ...