A5078695555- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Geology and Paleoclimatology Research
- Cardiovascular Health and Disease Prevention
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
Danish Meteorological Institute
2013-2022
Abstract Motivated by recent event studies and modeling efforts on pulsating aurora, which conclude that the precipitation energy during these events is high enough to cause significant chemical changes in mesosphere, this study looks for bulk behavior of auroral pulsations. Based about 400 aurora events, we outline typical duration, geomagnetic conditions, change peak emission height events. We show both green blue decreases 8 km at start interval. This brings hardest 10% electrons down 90...
The non-negative Polar Cap PCC index built from PCN (North) and PCS (South) indices correlates better with the solar wind merging electric field is more representative for total energy input to magnetosphere development of geomagnetic disturbances represented by Kp ring current than either hemispheric indices. present work shows that index, Dst, a high degree accuracy can be derived source function integration PCC-based throughout interval 1992 2018 without attachment real Dst based on low...
The Polar Cap (PC) indices, PCN (North) and PCS (South) are based on polar geomagnetic observations from Qaanaaq (Thule) Vostok, respectively, processed to measure the transpolar plasma convection that may seriously affect space weather conditions. To establish reliable forecasts PC also ensure credibility of their use for scientific analyses solar wind-magnetosphere interactions, additional sources data indices investigated. In search alternative index sources, objective quality criteria...
Abstract The Polar Cap (PC) indices are derived from the magnetic variations generated by transpolar convection of magnetospheric plasma and embedded fields driven interaction with solar wind. PC potentially very useful for space weather monitoring forecasts related research. However, this study suggests that index series in near‐real‐time final versions endorsed International Association Geomagnetism Aeronomy (IAGA) invalid unreliable. Both include wind sector (SWS) effects calculation...
Abstract Polar Cap (PC) indices, PCN North based on magnetic observations from Qaanaaq (THL) in Greenland and PCS South data Vostok Antarctica, are very useful indices for studies of solar wind‐magnetosphere interactions space weather monitoring forecasts. issued the Danish Space Research Institute (DTU Space) while Arctic Antarctic (AARI) St Petersburg. Unfortunately, series invalid values have been provided AARI used a number publications since PC index concept was endorsed by...
Abstract. The description presented in the paper of relations solar wind sector structure to derivation quiet daily variation (QDC) polar magnetic recordings used for calculation cap (PC) indices is found be unclear and not properly justified. example on inclusion a term an actual QDC series questionable even authors' premises.
Abstract. The Polar Cap (PC) indices were approved by the International Association for Geomagnetism and Aeronomy (IAGA) in 2013 made available at web portal http://pcindex.org holding prompt (real-time) as well archival index values. present note provides first reported examination of validity IAGA-endorsed method to generate real-time PC It is demonstrated that features derivation procedure defined Janzhura Troshichev (2011) may cause considerable excursions values compared final In...
The Polar Cap (PC) indices were approved by the International Association for Geomagnetism and Aeromony (IAGA) Resolution No. 3 (2013) noting that “ IAGA … recommends use of PC index international scientific community in its near-real time definitive forms” . made available 2014 at web portal http://pcindex.org holding as well final values. values are not permanently available. However, analyses on basis occasional downloads have detected differences between up to 3.65 mV/m (Stauning, 2018b,...
Abstract The publication by Stauning (2022b, 10.1029/2022JA030355 ): “The use of invalid Polar Cap South (PCS) indices in publications.” Journal Geophysical Research: Space Physics , 127 e2022JA030355 is based on values the PCS derived at Arctic and Antarctic Research Institute (AARI) authors Comment made available web portal maintained International Service Geomagnetic Indices (ISGI) supported Association for Geomagnetism Aeronomy also AARI. One version (“pre‐2021PCS”) comprises a series...
Abstract The present study confirms the validity of previously derived relations between polar cap (PC) indices and ASY‐H Dst SYM‐H ring current when used in real‐time applications. PC are here simulated (SRT) versions by using past data only from −40 days up to time construction quiet reference levels (QDCs) for magnetic data. From analyses spanning a decade (2009–2018), equivalent index values were linear relation with SRT PCN (North) PCS (South) combined form non‐negative PCC indices. For...
The aim of the present contribution is to investigate timing relations between enhancements in Polar Cap (PC) indices and power grid disturbances related geomagnetically induced currents (GIC). polar cap indices, PCN (North) PCS (South), are based on measurements geomagnetic variations central caps. These strongly transpolar convection plasma magnetic fields driven by solar wind. During cases enhanced merging processes at front magnetosphere subsequent tailward embedded fields,...
Abstract The standard polar cap (PC) indices, PCN (North) based on magnetic data from Qaanaaq in Greenland and PCS (South) Vostok Antarctica, have been submitted the Arctic Antarctic Research Institute St. Petersburg, Russia, Danish Meteorological Institute, Space different versions. In order to consolidate indices or replace poor missing index data, derivation procedures developed generate alternative values Dome Concordia (Dome‐C) observations epoch 2009–2020 of solar cycle 24. reference...
In the publication Troshichev et al. (2006) on Polar Cap (PC) indices, PCN and PCS, an error was made by using components of Interplanetary Magnetic Field (IMF) in their Geocentric Solar Ecliptic (GSE) representation instead prescribed Magnetospheric (GSM) for calculations index scaling parameters. The mistake has caused a trail incorrect relations wrong conclusions extending since 2006 up to now (2020) which should be discontinued, instance, issuing corrigendum note from authors. present...
Abstract In the publication Troshichev et al. (2006) ( https://doi.org/10.1029/2005JA011402 ) on polar cap (PC) indices, PCN and PCS, an error was made by using components of interplanetary magnetic field (IMF) in their geocentric solar ecliptic (GSE) representation instead prescribed magnetospheric (GSM) for calculations index scaling parameters. The mistake has caused a trail incorrect relations wrong conclusions extending since 2006 up to now (2020) which should be discontinued, instance,...
Abstract. The only published description of the solar wind sector (SS) term used for reference level in post-event and real-time derivation Polar Cap (PC) indices, PCN (Polar North) PCS South), version endorsed by International Association Geomagnetism Aeronomy (IAGA) is found commented publication, Janzhura Troshichev: Identification IMF structure near-real time ground magnetic data, Annales Geophysicae, 29, 1491–1500, 2011. Actually, publication has served as a basis index endorsement IAGA...
Examination of the contribution from O.A. Troshichev, S. Dolgacheva, N.A. Stepanov, and D.A. Sormakov: “The PC index variations during 23/24 solar cycles: relation to wind parameters magnetic disturbances. https://doi.org/10.1029/2020JA028491 ” has disclosed inconsistencies in applied methods serious errors calculated values. Some discrepancies reported present commentary affect directly illustrations presented their while other possible may not be apparent since use relative values...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Physics. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]The use invalid Polar Cap South (PCS) indices in publicationsAuthorsPeterStauningiDSee all authors Peter StauningiDCorresponding Author• Submitting AuthorDanish...
Earth and Space Science Open Archive This work has been accepted for publication in Weather. Version of RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Transpolar convection magnetospheric ring current relations: real time applications Polar Cap (PC) indicesAuthorsPeterStauningiDSee all authors Peter StauningiDCorresponding Author• Submitting...
The Polar Cap (PC) indices are derived from the magnetic variations generated by transpolar convection of magnetospheric plasma and embedded fields driven interaction with solar wind. PC potentially very useful for Space Weather monitoring forecasts related research. However, index series in near-real time final versions endorsed International Association Geomagnetism Aeronomy (IAGA) considered unreliable. Both include wind sector (SWS) effects calculation reference levels which disturbances...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Other. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]The Polar Cap (PC) index combination, PCC: relations solar wind properties global magnetic disturbancesAuthorsPeterStauningiDSee all authors Peter StauningiDCorresponding Author• Submitting...
Abstract. The only published description of the solar wind sector (SS) term used for reference level in post-event and real-time derivation Polar Cap (PC) indices, PCN (North) PCS (South), version endorsed by International Association Geomagnetism Aeronomy (IAGA) is found commented publication, Janzhura Troshichev (2011): Identification IMF structure near-real time ground magnetic data, Annales Geophysicae, 29, 1491–1500. Actually, publication has served as basis index endorsement IAGA 2013....
The Polar Cap (PC) indices are derived from the magnetic variations generated by transpolar convection of magnetospheric plasma and embedded fields driven interaction with solar wind. PC potentially very useful for Space Weather monitoring forecasts related research. However, index series in near-real time final versions endorsed International Association Geomagnetism Aeronomy (IAGA) considered unreliable. Both include wind sector (SWS) effects calculation reference levels which disturbances...
<p>The Polar Cap (PC) indices are derived from the magnetic variations generated by transpolar convection of magnetospheric plasma and embedded fields driven interaction with solar wind. The PC potentially very useful for Space Weather monitoring forecasts related research. However, index series in near-real time final versions endorsed International Association Geomagnetism Aeronomy (IAGA) have been proven unreliable (Stauning, 2013, 2015, 2018a,b,c, 2020). Both include wind...
Abstract. In the publication Troshichev et al. (2006) on Polar Cap (PC) indices, PCN (North) and PCS (South), an error was made by using components of Interplanetary Magnetic Field (IMF) in their Geocentric Solar Ecliptic (GSE) representation instead prescribed Magnetosphere (GSM) for calculations index scaling parameters version AARI_1998-2001 (named AARI#3) issued from Arctic Antarctic Research Institute (AARI) St Petersburg, Russia. The mistake has caused a trail incorrect relations wrong...
In the publication Troshichev et al. (2006) on Polar Cap (PC) indices, PCN and PCS, an error was made by using components of Interplanetary Magnetic Field (IMF) in their Geocentric Solar Ecliptic (GSE) representation instead prescribed Magnetospheric (GSM) for calculations index scaling parameters. The mistake has caused a trail incorrect relations wrong conclusions extending since 2006 up to now (2020) which should be discontinued, instance, issuing corrigendum note from authors. present...