Seasonal variations of CO and HCN in the troposphere measured by solar absorption spectroscopy over Poker Flat, Alaska

Tropospheric partial column abundances of CO and HCN have been retrieved from infrared solar spectra observed with a ground‐based spectrometer at Poker Flat Alaska (65°N, 147°W) over the time period from 2000 to 2004. From these data we report the transpacific transport induced inter‐annual variabil...

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Bibliographic Details
Published in:Geophysical research letters 2005-10, Vol.32 (19), p.L19812.1-n/a
Main Authors: Kasai, Yasuko J., Kagawa, Akiko, Jones, Nicholas, Fujiwara, Akimitsu, Seki, Koji, Murayama, Yasuhiro, Murcray, Frank
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Americas
Asian
Carbon monoxide
Earth sciences
Earth, ocean, space
Eastern
Exact sciences and technology
Infrared
Parcels
Partial
Pollution abatement
Position (location)
Sampling
Seasonal variations
Siberia
Solar spectra
Spectrometers
Stations
Transport
Troposphere
Variability
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Summary:Tropospheric partial column abundances of CO and HCN have been retrieved from infrared solar spectra observed with a ground‐based spectrometer at Poker Flat Alaska (65°N, 147°W) over the time period from 2000 to 2004. From these data we report the transpacific transport induced inter‐annual variability of tropospheric CO over Poker Flat. This is the first report of solar infrared data from the Poker Flat station, where the geographical location of the site means that remote sensing measurements are sampling the transport of transpacific air parcels going to Northern America from Eastern Siberia and Asia. The five year time‐span of the data also show significant differences in year to year CO and HCN tropospheric column enhancements driven by changes in Siberian/Asian pollution sources.
ISSN:0094-8276
1944-8007
DOI:10.1029/2005GL022826