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\begin{document}

\title{Antecedent Conditions Mitigate Carbon Loss During Flash Drought Events}



\author[1]{Nicholas C Parazoo}%
\author[2]{Mahmoud Osman}%
\author[3]{Madeleine Pascolini-Campbell}%
\author[4]{Brendan Byrne}%
\affil[1]{Jet Propulsion Laboratory}%
\affil[2]{Johns Hopkins University}%
\affil[3]{NASA Jet Propulsion Laboratory}%
\affil[4]{Jet Propulsion Lab}%


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  \date{May 26, 2024}


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\begin{abstract}
Flash droughts-- the rapid drying of land and intensification of drought
conditions - have devasting impacts to natural resources, food supplies,
and the economy. Less is currently known about the drivers of flash
droughts and their impact to landscape carbon losses. We leverage carbon
and water cycle data from NASA OCO-2 and SMAP missions to determine the
net impact of flash drought events in the U.S. on the carbon sinks. On
average, pre-onset carbon uptake fully offsets post-onset losses,
creating a carbon neutral biosphere over a +/- 3 month period
surrounding flash drought onset. This contrasts with ecosystem models,
which underestimate pre-onset uptake and overestimate post-onset loss.
Furthermore, spaceborne observations of solar induced fluorescence (SIF)
provide a reliable indicator of flash droughts at lead times of 2-3
months, due to feedbacks between vegetation growth and soil water loss.
This study is expected to improve understanding and prediction of flash
droughts.%
\end{abstract}%



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\textbf{Hosted file}

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\textbf{Hosted file}

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