% Transparences to seminar on ozondestruction at IRF.
\documentclass[a4paper,20pt,dvips]{foils}
\usepackage{latexsym}
\usepackage[dvips]{graphicx}
\usepackage{epsfig}
\usepackage{swedish}
\usepackage[T1]{fontenc}
\usepackage{/home/johan/program/chemsym}
%\usepackage{/home/johan/program/aliphat}

\newcommand{\blista}{\begin{itemize}}
\newcommand{\elista}{\begin{itemize}}
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\title{Ozon och freoner}

\begin{document}
\LogoOff
%\maketitle
 
%\begin{abstract}

%\end{abstract}
\foilhead{What does a single number say about a winters ozone depletion?}
\begin{itemize}
\item {Introduction}
\item {Background}
  \begin{list}{-}{}
  \item natural reactions
  \item clorines in stratosphere
  \item recipe for \O_3 loss
  \end{list}
\item {Observations and models}
\item {Spring 2000}
\end{itemize}

\rotatefoilhead{Chapman reactions}
\begin{eqnarray}
\O_2 + h\nu & \rightarrow & 2\ \O,\hspace{31mm} \lambda = 100 - 200 \mathrm{nm} \\
 \O + \O_2 + M & \rightarrow & \mathbf{O_3} + M \\
 \mathbf{O_3} + h\nu & \rightarrow & \O_2 + \O,\hspace{20mm} \lambda = 200 - 300 \mathrm{nm}\\
 \O + \O_3 & \rightarrow & 2\ \O_2
\end{eqnarray}

\rotatefoilhead{Chlorines in the stratosphere}
\begin{figure}
  \begin{center}
    \setlength{\unitlength}{1mm}
    \begin{picture}(200,110)
      \put(0,105){\makebox(200,15){chlorines}}
      \put(80,105){\vector(-2,-1){30}}
      \put(120,105){\vector(2,-1){30}}
      \put(0,75){\makebox(100,15){organic chlorines \C\Cl_y}}
      \put(100,75){\makebox(100,15){inorganic chlorines \Cl_y}}
      \put(140,75){\vector(-1,-1){15}}
      \put(160,75){\vector(1,-1){15}}
      \put(50,75){\vector(0,-1){15}}
      \put(25,45){\makebox(50,10){CFC's}}
      \put(25,35){\makebox(50,10){HCFC's}}
      \put(25,25){\makebox(50,10){Halons}}
      \put(25,15){\makebox(50,10){\C\H_4}}
      \put(25,5){\makebox(50,10){\C\H_3-\C\Cl_3}}
      \put(100,45){\makebox(50,15){reservoir}}
      \put(150,45){\makebox(50,15){active}}
      \put(125,45){\vector(0,-1){15}}
      \put(175,45){\vector(0,-1){15}}
      \put(100,20){\makebox(50,10){\Cl\O\N\O_2}}
      \put(100,10){\makebox(50,10){\H\Cl}}
      \put(150,20){\makebox(50,10){\Cl\O}}
      \put(150,10){\makebox(50,10){\Cl_2}}
      \put(150,0){\makebox(50,10){\Cl_2\O_2}}
    \end{picture}
    
  \end{center}
\end{figure}

\rotatefoilhead{Recipe for ozone destruction}
\begin{description}
\item [Vortex formation] cold isolated air circulating the pole.
\item [PSC formation] while sufficient low temperatures.
\item [Chlorine activation] heterogeneous reactions on PSC particles.
\item [Sunlight] catalytic destruction with mainly \Cl\O and \Br\O.
\end{description}

\rotatefoilhead{Chlorine activation}
\begin{eqnarray}
\H\Cl + \Cl\O\N\O_2 & \rightarrow & \H\N\O_3 + \Cl_2\\
\Cl\O\N\O_2 + \H_2\O & \rightarrow & \H\N\O_3 + \H\O\Cl\\
\H\Cl + \H\O\Cl & \rightarrow & \H_2\O  + \Cl_2\\
\N_2\O_5 + \H\Cl & \rightarrow & \H\N\O_3 + \Cl\O\N\O\\
\N_2\O_5+ \H_2\O & \rightarrow & 2\ \H\N\O_3
\end{eqnarray}

\rotatefoilhead{Ozone depletion}
\begin{eqnarray}
2\ \Cl\O + M & \rightarrow & \Cl_2\O_2 + M\\
\Cl_2\O_2  h\nu & \rightarrow & \Cl + \Cl\O_2\\
\Cl\O_2 + M & \rightarrow & \Cl + \O_2 + M\\
2(\Cl + \O_3 & \rightarrow & \Cl\O + \O_2)\vspace{5mm}\\
\mbox{total} \hspace{3cm} 2\ \O_3 & \rightarrow & 3\ \O_2
\end{eqnarray}


\rotatefoilhead{Ozone measurements}
\begin{description}
\item [Ground based] lidar, doas 
\item [Balloons] ozone sondes, doas, insitu
\item [Aircrafts] doas, lidar
\item [Satellites] doas
\end{description}

\end{document}
\endinput