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Liquid containing clouds at the North Slope of Alaska demonstrate sensitivity to local industrial aerosol emissions
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2021
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Source: Geophysical Research Letters, 48, e2021GL094307
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Journal Title:Geophysical Research Letters
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Description:Cloud condensation nucleus control alter cloud solar albedo through cloud droplet size. Here, we leverage anthropogenic emissions at the North Slope of Alaska as a natural laboratory to study relationships between aerosols and Arctic liquid-containing clouds. Averaging 14 years of MODIS observations, we found a reduction in temporally averaged cloud effective radius (urn:x-wiley:00948276:media:grl62868:grl62868-math-0001) of up to 1.0 μm related to localized pollution. Pronounced regional gradients in cloud frequency of occurrence and liquid water path prohibit the detection of potential changes of these variables. Observed changes of urn:x-wiley:00948276:media:grl62868:grl62868-math-0003 alter radiative fluxes and increase cloud-reflected shortwave radiation by up to 0.8 W m−2 in the Prudhoe Bay area for the period covered by observations (April–September). Due to the frequent occurrence of liquid-containing clouds, this implies that enhanced local emissions in Arctic regions can impact climate processes.
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Source:Geophysical Research Letters, 48, e2021GL094307
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Rights Information:CC BY
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Compliance:Submitted
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