Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/103847
Title: Datasets of the solar quiet (Sq) and solar disturbed (SD) variations of the geomagnetic field from the mid latitudinal Magnetic Observatory of Coimbra (Portugal) obtained by different methods
Authors: Morozova, Anna L. 
Rebbah, Rania 
Ribeiro, Paulo 
Keywords: Geomagnetic field; Coimbra Magnetic Observatory (COI); Regular geomagnetic field variations; Solar quiet variation (Sq); Disturbed solar variation (SD); Principal component analysis
Issue Date: Aug-2021
Publisher: Elsevier
Project: UID /00611/2020 
PTDC/CTA-GEO/ 31744/2017 
UIDB/04434/2020 
metadata.degois.publication.title: Data in Brief
metadata.degois.publication.volume: 37
Abstract: The datasets of daily variations is obtained from the geomagnetic field raw observations at the Coimbra Magnetic Observatory (COI, Portugal). The data set was obtained for the 01.01.2007-31.12.2017 time interval and covers almost the entire solar cycle 24. The raw data were processed using two methods to extract daily variability. The first method uses the so-called "geomagnetically quiet days" to calculate S-type variations as daily means resulting in the data sub-set named "IQD Sq and SD". The second method uses the principal component analysis (PCA) to extract main variability modes of the original data. The first three modes produced by PCA and explaining up to 98% of the variability of the raw data are in the data sub-set named "PCA modes". Both methods allow to extract regular geomagnetic field variations related to daily variations (S-type variations) in the ionospheric dynamo region and some magnetospheric currents (e.g., field-aligned currents). The COI location in middle latitudes near the mean latitude of the ionospheric Sq current vortex's focus allows studying its seasonal and decadal variability using the S-type regular variations of the geomagnetic field measured near the ground. The S-type variations for the X and Y components of the geomagnetic field obtained at the COI observatory can also be re-scaled and used to analyze geomagnetic field variations obtained at other European geomagnetic observatories at close latitudes. The S-type variations for the Z component of the geomagnetic field obtained at the COI observatory can be compared to similar variations observed at more continental regions to study the so-called "coastal effect" in the geomagnetic field variations.
Description: to be submitted to Data in Brief
URI: https://hdl.handle.net/10316/103847
ISSN: 23523409
DOI: 10.1016/j.dib.2021.107174
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
1-s2.0-S2352340921004583-main.pdf3.26 MBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

1
checked on Nov 4, 2024

WEB OF SCIENCETM
Citations

1
checked on Nov 2, 2024

Page view(s)

134
checked on Nov 5, 2024

Download(s)

59
checked on Nov 5, 2024

Google ScholarTM

Check

Altmetric

Altmetric


This item is licensed under a Creative Commons License Creative Commons