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Pregled bibliografske jedinice broj: 303847

Časopis

Autori: Verbanac, Giuliana; Korte, Monika; Mandea, Mioara
Naslov: On long-term trends of the European geomagnetic observatory biases
( On long-term trends of the European geomagnetic observatory biases )
Izvornik: Earth, Planets and Space (1343-8832) 59 (2007), 7; 685-695
Vrsta rada: članak
Ključne riječi: geomagnetism ; observatory data ; annual means
( geomagnetism ; observatory data ; annual means )
Sažetak:
We investigated the European geomagnetic observatory biases over 42 years, considered as contributions of the crustal field, and generally assumed to be constant in time. To estimate these biases, we compared observatory annual means to predictions given by the continuous CM4 model, and to four other core field models for different epochs. Solar-cycle related external fields are clearly present in the residuals. Although well-known, no suitable model to minimise them exists. We found that an empirical approach, taking advantage of the homogeneity of the external influences in the European region, can minimise these influences. Their reduction is better than when the external field description included in the comprehensive CM4 model is used. At several locations clear long-term trends remain after subtraction of the core field and minimisation of external fields. We investigated whether they are due to an insufficient description of the core field secular variation by the CM4 model, or to changes in induced lithospheric fields.
Projekt / tema: 119-1193086-1314
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Kategorija: Znanstveni
Znanstvena područja:
Geologija
URL Internet adrese: https://link.springer.com/article/10.1186/BF03352731
Broj citata:
Altmetric:
DOI: 10.1186/BF03352731
URL cjelovitog teksta:
Google Scholar: On long-term trends of the European geomagnetic observatory biases
Upisao u CROSBI: Marijan Herak (herak@irb.hr), 22. Kol. 2007. u 07:18 sati



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