\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{Stratospheric chlorine processing after the unprecedented Hunga Tonga
eruption}



\author[1]{Jun Zhang}%
\author[2]{Peidong Wang}%
\author[3]{Douglas Edward Kinnison}%
\author[4]{Susan Solomon}%
\author[2]{Jian Guan}%
\author[5]{Yunqian Zhu}%
\affil[1]{NSF National Center for Atmospheric Research}%
\affil[2]{Massachusetts Institute of Technology}%
\affil[3]{NCAR/CLAS}%
\affil[4]{MIT}%
\affil[5]{University of Colorado Boulder}%


\vspace{-1em}



  
  \date{May 17, 2024}


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





\selectlanguage{english}
\begin{abstract}
Following the Hunga Tonga--Hunga Ha'apai (HTHH) eruption in January
2022, a significant reduction in stratospheric hydrochloric acid (HCl)
was observed in the Southern Hemisphere mid-latitudes during the latter
half of 2022, suggesting potential chlorine activation. The objective of
this study is to comprehensively understand the substantial loss of HCl
in the aftermath of HTHH. Satellite measurements along with a global
chemistry-climate model are employed for the analysis. We find strong
agreement of 2022 anomalies between the modeled and the measured data.
The observed tracer-tracer relations between N2O and HCl indicate a
significant role of chemical processing in the observed HCl reduction,
especially during the austral winter of 2022. Further examining the
roles of chlorine gas-phase and heterogeneous chemistry, we find that
heterogeneous chemistry emerges as the primary driver for the chemical
loss of HCl, with the reaction between HOBr and HCl on sulfate aerosols
identified as the dominant loss process.%
\end{abstract}%



\sloppy




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

