\documentclass[10pt]{article}

\usepackage{fullpage}
\usepackage{setspace}
\usepackage{parskip}
\usepackage{titlesec}
\usepackage[section]{placeins}
\usepackage{xcolor}
\usepackage{breakcites}
\usepackage{lineno}
\usepackage{hyphenat}





\PassOptionsToPackage{hyphens}{url}
\usepackage[colorlinks = true,
            linkcolor = blue,
            urlcolor  = blue,
            citecolor = blue,
            anchorcolor = blue]{hyperref}
\usepackage{etoolbox}
\makeatletter
\patchcmd\@combinedblfloats{\box\@outputbox}{\unvbox\@outputbox}{}{%
  \errmessage{\noexpand\@combinedblfloats could not be patched}%
}%
\makeatother


\usepackage{natbib}




\renewenvironment{abstract}
  {{\bfseries\noindent{\abstractname}\par\nobreak}\footnotesize}
  {\bigskip}

\titlespacing{\section}{0pt}{*3}{*1}
\titlespacing{\subsection}{0pt}{*2}{*0.5}
\titlespacing{\subsubsection}{0pt}{*1.5}{0pt}


\usepackage{authblk}


\usepackage{graphicx}
\usepackage[space]{grffile}
\usepackage{latexsym}
\usepackage{textcomp}
\usepackage{longtable}
\usepackage{tabulary}
\usepackage{booktabs,array,multirow}
\usepackage{amsfonts,amsmath,amssymb}
\providecommand\citet{\cite}
\providecommand\citep{\cite}
\providecommand\citealt{\cite}
% You can conditionalize code for latexml or normal latex using this.
\newif\iflatexml\latexmlfalse
\providecommand{\tightlist}{\setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}%

\AtBeginDocument{\DeclareGraphicsExtensions{.pdf,.PDF,.eps,.EPS,.png,.PNG,.tif,.TIF,.jpg,.JPG,.jpeg,.JPEG}}

\usepackage[utf8]{inputenc}
\usepackage[english]{babel}



\usepackage{float}








\begin{document}

\title{Comment on ``Troshichev et al. 2020: The PC index variations during
23/24 solar cycles: relation to solar wind parameters and magnetic
disturbances.'': Invalid data base.}



\author[1]{Peter Stauning}%
\affil[1]{Danish Meteorological Institute}%


\vspace{-1em}



  
  \date{May 18, 2024}


\begingroup
\let\center\flushleft
\let\endcenter\endflushleft
\maketitle
\endgroup





\selectlanguage{english}
\begin{abstract}
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.%
\end{abstract}%



\sloppy


\textbf{Hosted file}

\verb`essoar.10510289.1.docx`  available at \url{https://authorea.com/users/518952/articles/604689-comment-on-troshichev-et-al-2020-the-pc-index-variations-during-23-24-solar-cycles-relation-to-solar-wind-parameters-and-magnetic-disturbances-invalid-data-base}

\selectlanguage{english}
\FloatBarrier
\end{document}

