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Water Vapor Near‐UV Absorption: Laboratory Spectrum, Field Evidence, and Atmospheric Impacts
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2019
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Source: Journal of Geophysical Research: Atmospheres, 124(24), 14310-14324
[PDF-6.39 MB]
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Journal Title:Journal of Geophysical Research: Atmospheres
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Description:Absorption of solar radiation by water vapor in the near ‐UV region is a poorly understood but important issue in atmospheric science. To better understand water vapor near ‐UV absorption, we constructed a cavity ring ‐down spectrometer with bandwidth of 5 cm−1(~0.05 nm) and obtained water vapor absorption cross sections at 1 ‐nm increments in the 290 ‐to 350 ‐nm region. Water vapor displays structured absorption over this range with maximum and minimum cross sections of 8.4 × 10−25and 1.6 × 10−25cm2/molecule. Major water vapor absorption bands were observed at 293 –295, 307 –313, 319, 321–322, and 325 nm, with cross ‐section values higher than 4.0 × 10−25cm2/molecule. To obtain further
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Source:Journal of Geophysical Research: Atmospheres, 124(24), 14310-14324
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ISSN:2169-897X;2169-8996;
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Rights Information:Other
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