Sensitivity of inter‐annual variation of CO2 seasonal cycle at Mauna Loa to atmospheric transport

Origins of the inter‐annual variations of the Mauna Loa atmospheric CO2 seasonal cycle related to atmospheric transport were examined using a global atmospheric transport model with prescribed land biota CO2 source functions at 11 land sections. On average, the seasonal variation of atmospheric CO2...

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Bibliographic Details
Published in:Tellus. Series B, Chemical and physical meteorology Chemical and physical meteorology, 2003-04, Vol.55 (2), p.547-554
Main Authors: TAGUCHI, SHOICHI, MURAYAMA, SHOHEI, HIGUCHI, KAZ
Format: Article
Language:English
Subjects:
Chemical composition and interactions. Ionic interactions and processes
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
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Summary:Origins of the inter‐annual variations of the Mauna Loa atmospheric CO2 seasonal cycle related to atmospheric transport were examined using a global atmospheric transport model with prescribed land biota CO2 source functions at 11 land sections. On average, the seasonal variation of atmospheric CO2 at Mauna Loa is influenced mostly by the Siberian CO2 flux, followed by temperate Asia and North America. The inter‐annual variability of the seasonal cycle is caused mainly by the inter‐annual variation in the transport of the Siberian signal to Mauna Loa. The characteristics of the simulated seasonal cycle and its inter‐annual variability at Mauna Loa are found to be sensitive to the quality of the wind data used to drive the transport model. Implication of this result is that for studying a long‐term variations of atmospheric transport a meteorological data set for driving an atmospheric transport model should be obtained from the same production procedure.
ISSN:0280-6509
1600-0889
DOI:10.1034/j.1600-0889.2003.00027.x