On the detectability of the magnetic fields induced by ocean circulation in geomagnetic satellite observations
-
Published:2022-12-09
Issue:1
Volume:74
Page:
-
ISSN:1880-5981
-
Container-title:Earth, Planets and Space
-
language:en
-
Short-container-title:Earth Planets Space
Author:
Hornschild AaronORCID, Baerenzung Julien, Saynisch-Wagner Jan, Irrgang Christopher, Thomas Maik
Abstract
AbstractDue to their sensitivity to conductivity and oceanic transport, magnetic signals caused by the movement of the ocean are a beneficial source of information. Satellite observed tidal-induced magnetic fields have already proven to be helpful to derive Earth’s conductivity or ocean heat content. However, magnetic signals caused by ocean circulation are still unobserved in satellite magnetometer data. We present a novel method to detect these magnetic signals from ocean circulation using an observing system simulation experiment. The introduced approach relies on the assimilation of satellite magnetometer data based on a Kalman filter algorithm. The separation from other magnetic contributions is attained by predicting the temporal behavior of the ocean-induced magnetic field through presumed proxies. We evaluate the proposed method in different test case scenarios. The results demonstrate a possible detectability of the magnetic signal in large parts of the ocean. Furthermore, we point out the crucial dependence on the magnetic signal’s variability and show that our approach is robust to slight spatial and temporal deviations of the presumed proxies. Additionally, we showed that including simple prior spatial constraints could further improve the assimilation results. Our findings indicate an appropriate sensitivity of the detection method for an application outside the presented observing system simulation experiment. Therefore, we finally discussed potential issues and required advances toward the method’s application on original geomagnetic satellite observations.
Graphical Abstract
Funder
Deutsche Forschungsgemeinschaft Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Geology
Reference47 articles.
1. Alken P, Thébault E, Beggan CD, Amit H, Aubert J, Baerenzung J, Bondar TN, Brown WJ, Califf S, Chambodut A, Chulliat A, Cox GA, Finlay CC, Fournier A, Gillet N, Grayver A, Hammer MD, Holschneider M, Huder L, Hulot G, Jager T, Kloss C, Korte M, Kuang W, Kuvshinov A, Langlais B, Léger J-M, Lesur V, Livermore PW, Lowes FJ, Macmillan S, Magnes W, Mandea M, Marsal S, Matzka J, Metman MC, Minami T, Morschhauser A, Mound JE, Nair M, Nakano S, Olsen N, Pavón-Carrasco FJ, Petrov VG, Ropp G, Rother M, Sabaka TJ, Sanchez S, Saturnino D, Schnepf NR, Shen X, Stolle C, Tangborn A, Tøffner-Clausen L, Toh H, Torta JM, Varner J, Vervelidou F, Vigneron P, Wardinski I, Wicht J, Woods A, Yang Y, Zeren Z, Zhou B (2021) International geomagnetic reference field: the thirteenth generation. Earth Planets Space 73(1):49. https://doi.org/10.1186/s40623-020-01288-x 2. Amante C, Eakins B (2009) ETOPO1 1 arc-minute global relief model: procedures, data sources and analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center, Boulder, Colorado 3. Baerenzung J, Holschneider M, Wicht J, Lesur V, Sanchez S (2020) The Kalmag model as a candidate for IGRF-13. Earth Planets Space 72(1):163. https://doi.org/10.1186/s40623-020-01295-y 4. Baerenzung J, Holschneider M, Saynisch-Wagner J, Thomas M (2022) Kalmag: a high spatio-temporal model of the geomagnetic field. Earth Planets Space 74(1):139. https://doi.org/10.1186/s40623-022-01692-5 5. Bao S, Wang H, Ren Z, Yan H, Chen J (2020) Spatial and temporal scales of sea surface salinity in the tropical Indian Ocean from SMOS, Aquarius and SMAP. J Oceanogr 76(5):389–400
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|