气候变化领域集成服务门户(CCPortal): Phase Changes of Electromagnetic Oceanic Tidal Signals

CCPortal

DOI	10.1029/2019JC015960
	Phase Changes of Electromagnetic Oceanic Tidal Signals
	Saynisch-Wagner J.; Petereit J.; Irrgang C.; Thomas M.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	Over the last years, the number of studies that investigate or utilize the electromagnetic (EM) signals generated by ocean tides is steadily growing. However, the majority of these studies focuses on the amplitudes of EM tidal signals. This study investigates the phases of EM tidal signals and their changes. Twenty-six years of monthly observation-based datasets of tidal velocities, geomagnetic field, and oceanic conductivity are fed into an EM induction solver to generate varying EM tidal signals. The sensitivities of the resulting EM signals are analyzed by forbidding or allowing the input datasets to vary in time. We report on the phase's sensitivities with respect to changes in the EM properties, that is, secular variation of the geomagnetic field and changes in oceanic conductivity. Distinct temporal behavior and distinct geographic pattern for the two sensitivities can be reported. In general, apart from global phase shifts of 3–5 degrees, concentrated areas with phase shifts of up to 45 degrees occur all over the globe, over the oceans, for example, Arctic and Atlantic Ocean, as well as on coastal land regions, for example, Southwest Greenland and Japan. Very locally, phase shifts of 90 degree or higher occur. ©2020. The Authors.
英文关键词	climate and interannual variability; electromagnetic fields; ocean tides; tidal phases
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186914
作者单位	Earth System Modelling, Helmholtz Centre Potsdam, GFZ German Research Centre, Potsdam, Germany; Institute of Meteorology, Freie Universität Berlin, Berlin, Germany
推荐引用方式 GB/T 7714	Saynisch-Wagner J.,Petereit J.,Irrgang C.,et al. Phase Changes of Electromagnetic Oceanic Tidal Signals[J],2020,125(4).
APA	Saynisch-Wagner J.,Petereit J.,Irrgang C.,&Thomas M..(2020).Phase Changes of Electromagnetic Oceanic Tidal Signals.Journal of Geophysical Research: Oceans,125(4).
MLA	Saynisch-Wagner J.,et al."Phase Changes of Electromagnetic Oceanic Tidal Signals".Journal of Geophysical Research: Oceans 125.4(2020).