Naslov
Temporal changes of the geomagnetic field in Croatia

Autori
Mandić, Igor ; Curman, Dino

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
19th IAGA Workshop - Abstracts / - , 2023, 25-25

Skup
19th IAGA Workshop on on Geomagnetic Observatory Instruments, Data Acquisition and Processing

Mjesto i datum
Sopron, Mađarska ; Tihany, Mađarska, 21.05.2023. - 26.05.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Geomagnetic variations

Sažetak
The Republic of Croatia is surrounded by 11 geomagnetic observatories. All observatories, except one, are located within the radius of 500 km from the Croatian observatory Lonjsko Polje (LON). The data from surrounding observatories were used to model the long-term and short-term variations of the geomagnetic field over the area bounded by 6 observatories, while 5 observatories are located within the polygon. LON data were not used as a model input, they were used only to evaluate errors of the modeled values. In 95% of cases, i.e. in periods when K<=4, the maximum differences between the LON time series and modeled values are within 5 nT, while the standard errors are five times smaller. Similar results were obtained using test measurements in South Dalmatia. From this we can conclude that the short-term variations are quite uniform over the observed area. On the other hand, the errors of the modeled secular variation are around 0.5 nT/year. At first glance, the errors seems small, but we should consider that in some components have almost constant misfit between the measured and modeled values.This means that a model of the long-term variations will have cumulative error around 5 nT per decade.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika

POVEZANOST RADA