Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 46, Issue 7, Pages 4007-4016Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL082311
Keywords
Arctic; atmospheric aerosol; ice nucleating particles; ice cores
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Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), within the Transregional Collaborative Research Center ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3 [268020496 TRR 172]
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The historical development of ice nucleating particle concentrations (N-INP) is still unknown. Here, we present for the first time N-INP from the past 500 years at two Arctic sites derived from ice core samples. The samples originate from the EUROCORE ice core (Summit, Central Greenland) and from the Lomo09 ice core (Lomonosovfonna, Svalbard). No long-term trend is obvious in the measured samples, and the overall range of N-INP is comparable to present-day observations. We observe that the short-term variations in N-INP is larger than the long-term variability, but neither anthropogenic pollution nor volcanic eruptions seem to have influenced N-INP in the measured temperature range. Shape and onset temperature of several INP spectra suggest that INP of biogenic origin contributed to the Arctic INP population throughout the past.
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