DOI: 10.1002/2017JC013742
Scopus记录号: 2-s2.0-85045951345
论文题名: On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals
作者: Saynisch J. ; Irrgang C. ; Thomas M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 2305
结束页码: 2314
语种: 英语
英文关键词: ocean currents
; ocean heat budget
; oceanic induction
; remote sensing
; satellite altimetry
Scopus关键词: detection method
; electromagnetic field
; heat budget
; magnetic field
; magnetometer
; oceanic circulation
; oceanic current
; remote sensing
; satellite altimetry
; satellite data
; time series analysis
; Southern Ocean
英文摘要: Oceanic magnetic signals are sensitive to ocean velocity, salinity, and heat content. The detection of respective signals with global satellite magnetometers would pose a very valuable source of information. While tidal magnetic fields are already detected, electromagnetic signals of the ocean circulation still remain unobserved from space. We propose to use satellite altimetry to construct proxy magnetic signals of the ocean circulation. These proxy time series could subsequently be fitted to satellite magnetometer data. The fitted data could be removed from the observations or the fitting constants could be analyzed for physical properties of the ocean, e.g., the heat budget. To test and evaluate this approach, synthetic true and proxy magnetic signals are derived from a global circulation model of the ocean. Both data sets are compared in dependence of location and time scale. We study and report when and where the proxy data describe the true signal sufficiently well. Correlations above 0.6 and explained variances of above 80% can be reported for large parts of the Antarctic ocean, thus explaining the major part of the global, subseasonal magnetic signal. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114310
Appears in Collections: 气候减缓与适应
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作者单位: Earth System Modelling, Helmholtz Centre Potsdam, GFZ German Research Centre, Potsdam, Germany; Institute of Meteorology, Freie Universität Berlin, Berlin, Germany
Recommended Citation:
Saynisch J.,Irrgang C.,Thomas M.. On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)