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530
19
550
19
Alaska
19
Alert
19
Arctic
19
Barrow
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Canada
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Ellesmere Island
Greenland
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Nunavut
19
Ny-Alesund
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Queen Elizabeth Islands
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Spitsbergen
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Svalbard
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Svalbard and Jan Mayen
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United States
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annual variation
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concentration (composition)
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filter
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ground-based measurement
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ice
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nucleation
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particulate matter
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