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Original Research Papers

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

Authors:

Shoichi Taguchi ,

National Institute of Advanced Industrial Science and Technology, AIST-West, 16.1, Onogawa, Tsukuba, Ibaraki 305–8569, JP
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Shohei Murayama,

National Institute of Advanced Industrial Science and Technology, AIST-West, 16.1, Onogawa, Tsukuba, Ibaraki 305–8569, JP
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Kaz Higuchi

Meteorological Service of Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, CA
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Abstract

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.

How to Cite: Taguchi, S., Murayama, S. and Higuchi, K., 2003. Sensitivity of inter-annual variation of CO2 seasonal cycle at Mauna Loa to atmospheric transport. Tellus B: Chemical and Physical Meteorology, 55(2), pp.547–554. DOI: http://doi.org/10.3402/tellusb.v55i2.16702
  Published on 01 Jan 2003
 Accepted on 12 Sep 2002            Submitted on 25 Jan 2002

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