2018
DOI: 10.5194/acp-2018-995
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New insights into aerosol and climate in the Arctic

Abstract: <p><strong>Abstract.</strong> Motivated by the need to predict how the Arctic atmosphere will change in a warming world, this article summarizes recent advances made by the research consortium NETCARE (Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments) that contribute to our fundamental understanding of Arctic aerosol particles as they relate to climate forcing. The overall goal of NETCARE research has been to use an interdis… Show more

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Cited by 6 publications
(9 citation statements)
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References 182 publications
(264 reference statements)
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“…Aerosol acidity concentrations decreased by 76%, while sulfate decreased less by 52%. We suggest that, through the dehydration‐greenhouse feedback effect in Arctic winter ice clouds involving ice nucleation (Abbatt et al, ; Blanchet & Girard, ; Fisher et al, ; Girard et al, ), the observed increase in aerosol neutralization enhances ice formation (Abbatt et al, ) and ameliorates the infrared cooling caused by acidic sulfates at their peak in the 1980s.…”
Section: Resultsmentioning
confidence: 84%
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“…Aerosol acidity concentrations decreased by 76%, while sulfate decreased less by 52%. We suggest that, through the dehydration‐greenhouse feedback effect in Arctic winter ice clouds involving ice nucleation (Abbatt et al, ; Blanchet & Girard, ; Fisher et al, ; Girard et al, ), the observed increase in aerosol neutralization enhances ice formation (Abbatt et al, ) and ameliorates the infrared cooling caused by acidic sulfates at their peak in the 1980s.…”
Section: Resultsmentioning
confidence: 84%
“…In other words, the Alert aerosol showed an increase in neutralization associated with a shift from sulfuric acid to ammonium sulfate particles, due to a decline in SO 2 emissions relative to NH 3 emissions. One potential consequence of increased neutralization in the Arctic would be an increase in ice nuclei formation, which would ameliorate the infrared cooling effect of winter ice clouds associated with acidic arctic haze sulfates acting through the dehydration‐greenhouse feedback effect (Abbatt et al, ; Blanchet & Girard, ; Fisher et al, ; Girard et al, ).…”
Section: Seasonal and Long‐term Variation Of Aerosol Ozone And Mercmentioning
confidence: 99%
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“…When sufficient sunlight crosses the sea ice or the free ocean surface, phytoplankton can also bloom in the water column, taking advantage of nutrient stocks replenished over the winter and stable stratification caused by ice melt. These pulses of sympagic and pelagic algal growth, largely dominated by diatom species, account for a major portion of annual primary production in polar waters (Perrette et al, 2011;Wassmann and Reigstad, 2011;Renaut et al, 2018) and result in the emission of a wide diversity of biogenic particles and gases to the atmosphere (Levasseur, 2013;Gabric et al, 2018;Abbatt et al, 2019).…”
Section: Introductionmentioning
confidence: 99%
“…Biogenic emissions play an important role in the Arctic climate in late spring and summer, when biological activity is maximal and the atmosphere is depleted of aerosols (both natural and anthropogenic; Abbatt et al, 2019). The low aerosol baseline, caused by limited transport from lower latitudes and efficient scavenging (Heintzenberg et al, 2015;Croft et al, 2016), favors secondary aerosol formation from local gaseous emissions (Leaitch et al, 2013;Collins et al, 2017).…”
Section: Introductionmentioning
confidence: 99%