He says that's because soot is
washed out of the atmosphere within a few months, whereas carbon dioxide persists up to 200 years.
By the way, CO2 dissolves readily in H2O and moreso in cold H2O, so every time it rains / snows / etc, a whole lot of CO2 is
washed out of the atmosphere.
Water has a residence time of 8 - 10 days in the atmosphere, so whenever it rains carbon dioxide is being
washed out of the atmosphere, because, water (vapour, liquid, solid) in the atmosphere attracts all carbon dioxide in the vicinity — together forming carbonic acid which gives all natural unpolluted rain its pH of around 5.6 - 8.
Black carbon is
washed out of the atmosphere by rain, and only has a lifetime of a few weeks.
Also, the aerosol
washes out of the atmosphere within days.
Not exact matches
It relies on a dank,
washed -
out atmosphere that informs the narrative by very lack
of its presence.
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Could there be something different about the local source material — ocean plankton producing one kind
of sediment exposed to the
atmosphere, versus say peat bogs or coal seams being
washed out upstream and delivering locally derived material directly to the sediment beds?
And more, in these days
of Cold PDO and especially more precipitation due to the solar condition, we might see more CO2
washed faster
out of the
atmosphere.
Severe haze in Beijing is more likely to develop in winter months — December, January, and February — because
of high levels
of polluting emissions and a lack
of rain to
wash pollution
out of the
atmosphere.
It's even more attractive because black carbon
washes quickly
out of the
atmosphere, and so reducing soot emissions would lead to a fast fall in the concentration
of black carbon in the
atmosphere.