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\begin{document}

\title{An Analytical Model for the Meridional Gradient in CO2 Forcing}



\author[1]{Nadir Jeevanjee}%
\author[2]{Jacob Seeley}%
\author[3]{David Paynter}%
\author[1]{Stephan Fueglistaler}%
\affil[1]{Princeton University}%
\affil[2]{University of California Berkeley}%
\affil[3]{NOAA GFD Lab-Princeton University}%


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  \date{May 20, 2024}


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\begin{abstract}
Meridional gradients in CO2 forcing are known to drive increases in
poleward heat transport (Huang and Zhang 2014, Huang et al. 2017).
However, the climate factors which control these meridional forcing
gradients are not well understood. Building upon the work of Wilson
(2012), we build a first-principles, analytical model for CO2 forcing
which requires as input only the temperatures at the surface and roughly
30 hPa, as well as column relative humidity. This model quantitatively
captures global variations in clear-sky CO2 forcing, and shows that the
meridional forcing gradient is directly attributable to the meridional
surface temperature gradient.%
\end{abstract}%



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