Abstract:In the publication Troshichev et al. (2006) (https://doi.org/10.1029/2005JA011402) on the polar cap (PC) indices, PCN and PCS, an error was made by using components of the interplanetary magnetic field (IMF) in their geocentric solar ecliptic (GSE) representation instead of the prescribed geocentric solar magnetospheric (GSM) representation for calculations of index scaling parameters. The mistake has caused a trail of incorrect relations and wrong conclusions extending since 2006 up to now (2020) which should… Show more
“…The main blame for the devaluation of the above‐mentioned 9 publications that join the 40 publications, listed in Section 5.2 of Stauning (2021a), which also suffer from having used invalid PC indices, is carried by IAGA for having endorsed the unclear Resolution #3 (2013) and neglected adhering to the requirements in par#2 of IAGA Criteria for endorsement of indices by IAGA (2009):“ 2. The derivation of the index will be clearly defined; the algorithm will be available through appropriate refereed and citeable publication(s); the algorithm must be shown to be independently reproducible and the responsible institute will ensure the homogeneity of the data series over the whole time series .”…”
Section: Discussionmentioning
confidence: 99%
“…The computer software initially developed by A. Janzhura (then at AARI) has recently been adjusted by Nielsen and Willer (2019). The PC index derivation methods have been questioned and modifications suggested in Stauning (2013aStauning ( , 2013bStauning ( , 2015Stauning ( , 2018aStauning ( , 2020Stauning ( , and 2021a.…”
Polar Cap (PC) indices, PCN North based on magnetic observations from Qaanaaq (THL) in Greenland and PCS South based on magnetic data from Vostok in Antarctica, are very useful indices for studies of solar wind‐magnetosphere interactions and for space weather monitoring and forecasts. PCN indices are issued from the Danish Space Research Institute (DTU Space) while PCS indices are issued from the Arctic and Antarctic Research Institute (AARI) in St Petersburg. Unfortunately, series of invalid PCS values have been provided from AARI and used in a number of publications issued since the PC index concept was endorsed by the International Association of Geomagnetism and Aeronomy (IAGA) in 2013. In spite of the disclosure of the failure in the PCS indices in 2018, publishing at the IAGA‐supported International Service of Geomagnetic Indices of the invalid indices has continued up to now (2022). The present contribution defines the invalidating features of the PCS indices in question, conveys examples, and discusses the applications in peer‐reviewed publications.
“…The main blame for the devaluation of the above‐mentioned 9 publications that join the 40 publications, listed in Section 5.2 of Stauning (2021a), which also suffer from having used invalid PC indices, is carried by IAGA for having endorsed the unclear Resolution #3 (2013) and neglected adhering to the requirements in par#2 of IAGA Criteria for endorsement of indices by IAGA (2009):“ 2. The derivation of the index will be clearly defined; the algorithm will be available through appropriate refereed and citeable publication(s); the algorithm must be shown to be independently reproducible and the responsible institute will ensure the homogeneity of the data series over the whole time series .”…”
Section: Discussionmentioning
confidence: 99%
“…The computer software initially developed by A. Janzhura (then at AARI) has recently been adjusted by Nielsen and Willer (2019). The PC index derivation methods have been questioned and modifications suggested in Stauning (2013aStauning ( , 2013bStauning ( , 2015Stauning ( , 2018aStauning ( , 2020Stauning ( , and 2021a.…”
Polar Cap (PC) indices, PCN North based on magnetic observations from Qaanaaq (THL) in Greenland and PCS South based on magnetic data from Vostok in Antarctica, are very useful indices for studies of solar wind‐magnetosphere interactions and for space weather monitoring and forecasts. PCN indices are issued from the Danish Space Research Institute (DTU Space) while PCS indices are issued from the Arctic and Antarctic Research Institute (AARI) in St Petersburg. Unfortunately, series of invalid PCS values have been provided from AARI and used in a number of publications issued since the PC index concept was endorsed by the International Association of Geomagnetism and Aeronomy (IAGA) in 2013. In spite of the disclosure of the failure in the PCS indices in 2018, publishing at the IAGA‐supported International Service of Geomagnetic Indices of the invalid indices has continued up to now (2022). The present contribution defines the invalidating features of the PCS indices in question, conveys examples, and discusses the applications in peer‐reviewed publications.
“…The blame for the devaluation of the above-mentioned 8 publications that join the 40 publication listed in section 5.2 of Stauning (2021c), which also suffer from having used invalid PC indices, is carried by IAGA for having endorsed the unclear Resolution #3 (2013) and neglected adhering to the requirements in par#2 of IAGA Criteria for endorsement of indices by IAGA ( 2009): "2. The derivation of the index will be clearly defined; the algorithm will be available through appropriate refereed and citeable publication(s); the algorithm must be shown to be independently reproducible and the responsible institute will ensure the homogeneity of the data series over the whole time series.…”
Section: Discussionmentioning
confidence: 99%
“…The computer software initially developed by A. Janzhura has recently been adjusted by Nielsen and Willer (2019). The PC index derivation methods have been questioned and modifications suggested in Stauning (2013aStauning ( ,b, 2015Stauning ( , 2018aStauning ( , 2020Stauning ( , and 2021c).…”
Polar Cap PC) indices, PCN North based on magnetic observations from Qaanaaq (THL) in Greenland and PCS South based on magnetic data from Vostok in Antarctica, are very useful indices for studies of solar wind-magnetosphere interactions and for space weather monitoring and forecasts. PCN indices are issued from the Danish Space Research Institute (DTU Space) while PCS indices are issued from the Arctic and Antarctic Research Institute (AARI) in St Petersburg. Unfortunately, series of invalid PCS values have been provided from AARI and used in a number of publications issued since the PC index concept was endorsed by the International Association of Geomagnetism and Aeronomy (IAGA) in 2013. The present contribution defines the invalidating features of the PCS indices in question, conveys examples, and discusses the applications in peer-reviewed publications.
“…The computer software initially developed by A. Janzhura has recently been adjusted by . The PC index derivation methods have been questioned and modifications suggested in Stauning (2013aStauning ( ,b, 2015Stauning ( , and 2021c.…”
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 solar wind parameters and magnetic disturbances. https://doi.org/10.1029/2020JA028491 " has disclosed inconsistencies in the applied methods and serious errors in the calculated values. Some of the discrepancies reported in the present commentary affect directly the illustrations presented in their contribution while other possible errors may not be apparent since the use of relative values in their presentation makes thorough assessments difficult.
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