deletions | additions       diff --git a/section_Background_Dust_devils_are__.tex b/section_Background_Dust_devils_are__.tex  index 1d0f628..78ff2aa 100644  --- a/section_Background_Dust_devils_are__.tex  +++ b/section_Background_Dust_devils_are__.tex 
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The dust-lifting capacity of dust devils seems to depend sensitively on their structures, in particular on the pressure wells at their centers \citep{Neakrase_2006}, so the dust supply from dust devils on both planets may be dominated by the seldom observed larger devils. Thus, elucidating the origin, evolution, and population statistics of dust devils is critical for understanding important terrestrial and Martian atmospheric properties and for in-situ exploration of Mars.   Studies of Martian dust devils have been conductedeither  through direct imaging of the devils, devils and  identification of their tracks on Mars' dusty surface \citep[cf.][]{Balme_2006}. Studies with in-situ meteorological instrumentation have also identified dust devils,either via obscuration of the Sun by the dust column \citep{Zorzano_2013} or their pressure signals \citep{Ellehoj_2010}. Studies of terrestrial dust devils frequently involve in-person monitoring of field sites, and dust devils are visually surveyed \citep{Pathare_2010} or directly sampled \citep{Balme_2003}. There is a long history of terrestrial dust devil studies using in-situ meteorological equipment as well \cite{Sinclair_1973, Lorenz_2012}.
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