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\title{Effect of Regional Marine Cloud Brightening Interventions on Climate
Tipping Elements}



\author[1]{Haruki Hirasawa}%
\author[1]{Dipti Swapnil Hingmire}%
\author[1]{Hansi Alice Singh}%
\author[2]{Philip J. Rasch}%
\author[3]{Peetak Mitra}%
\affil[1]{University of Victoria}%
\affil[2]{Pacific Northwest National Laboratory (DOE)}%
\affil[3]{Palo Alto Research Center}%


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  \date{May 07, 2026}


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\begin{abstract}
It has been proposed that increasing greenhouse gas (GHG) driven climate
tipping point risks may prompt consideration of solar radiation
modification (SRM) climate intervention to reduce those risks. Here, we
study marine cloud brightening (MCB) SRM interventions in three
subtropical oceanic regions using Community Earth System Model 2 (CESM2)
experiments. We assess the MCB impact on tipping element-related metrics
to estimate the extent to which such interventions might reduce tipping
element risks. Both the pattern and magnitude of the MCB cooling depend
strongly on location of the MCB intervention. We find the MCB cooling
effect reduces most tipping element impacts; though differences in MCB
versus GHG climate response patterns mean MCB is an imperfect remedy.
However, MCB applied in certain regions may exacerbate certain GHG
tipping element impacts. Thus, it is crucial to carefully consider the
pattern of MCB interventions and their teleconnected responses to avoid
unintended climate effects.%
\end{abstract}%



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