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Ohkubo, Shinjiro; Kosugi, Yoshiko (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
Subjects:
Storage fluxes of CO2, air temperature and relative humidity were measured in a temperate Japanese cypress forest for 3 yr. The 3-yr means of diurnal storage fluxes of CO2 (Sc), latent heat (Qa) and sensible heat (Qw) ranged from −1.3 to 1.2 μmol m-2 s-1, −9 to 12 W m-2 and -2 to 5 W m-2, respectively. The mean diurnal eddy fluxes of CO2 (Fc), sensible heat (H) and latent heat (λE) ranged from −13.1 to 2.6 μmol m-2 s-1, −37 to 187 and 7 to 146 W m-2, respectively. The variation and amplitude of diurnal changes in Sc, Qa and Qw were generally similar to those reported for other forests. However, the amplitude of diurnal changes in Sc was much smaller than that of tropical rain forests. The amplitudes of diurnal changes in Sc and Qw in summer were larger than those in winter, although the amplitude of Qa exhibited no clear seasonal variation. This was likely because of the small seasonal change in the source (sensible heat exchange) in comparison with CO2 and latent heat exchange.DOI: 10.1111/j.1600-0889.2007.00321.x
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