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キーワード:
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要旨:
Volatile organic compounds (VOCs) are ever-present compounds in the air we breathe.
They are emitted by natural and anthropogenic sources and are modified by atmospheric
oxidants. VOCs affect air quality and human health, form and grow aerosol particles, and
can impact Earth's radiative balance. Total hydroxyl radical (OH) reactivity measurements
are a valuable tool for assessing the comprehensiveness of measured VOCs and can give
valuable insights into in situ atmospheric chemistry. Especially in remote forested environ-
ments, missing or unaccounted for reactivity has been substantial, caused by either unmeas-
ured primary emissions or secondary oxidation products. This study presents OH reactivity
and VOC measurements over a Nordic, subarctic wetland in summer. Over half of the OH
reactivity from emissions could not be attributed, while the remaining measured fraction is
dominated by isoprene (42%), followed by sesquiterpenes (3%)
