Abstract
Water vapour and CO2 fluxes were measured by the eddy-covariance technique above a mixed needle and broad-leaved forest with affiliated meteorological measurements in Changbai Mountain as part of China’s FLUX projects since late August in 2002. Net water vapour exchange and environmental control over the forest were examined from September 1 to October 31 in 2002. To quantify the seasonal dynamics, the transition period was separated into leafed, leaf falling and leafless stages according to the development of leaf area. The results showed that (a) seasonal variation of water vapour exchange was mainly controlled by net radiation (R n ) which could account for 78.5%, 63.4% and 56.6% for leafed, leaf falling and leafless stages, respectively, while other environmental factors’ effects varied evidently; (b) magnitude of water vapour flux decreased remarkably during autumn and daily mean of water vapour exchange was 24.2 mg m−2 s−1 (100%), 14.8 mg m−2 s−1 (61.2%) and 10.3 mg m−2 s−1 (42.6%) for leafed, leaf falling and leafless stage, respectively; and (c) the budget of water vapour exchange during autumn was estimated to be 87.1 kg H2O m−2, with a mean of 1427.2 g H2O d−1 varying markedly from 3104.0 to 227.5 g H2O m−2d−1.
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References
Aubinet M, Grelle A, Ibrom Aet al., 2000. Estimates of the annual net carbon and water exchange of European forests: the EUROFLUX methodology.Adv. Ecol. Res., 30: 113–174.
Baldocchi D D, Falge E, Gu Let al., 2001. FLUXNET: a new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor and energy flux densities.Bull. Am. Meteorol. Soc, 82: 2415–2434.
Baldcchi D, J Finnigan, K Wilsonet al., 2000. On measuring net carbon exchange over tall vegetation on complex terrain.Boundary—Layer Meteorology, 96: 257–291.
Baldocchi D D, Hicks B B, Meyers T P, 1988. Measuring biosphere-atmosphere exchanges of biologically related gases with micrometeorological methods.Ecology, 69: 1331–1340.
Barford C C, Wofsy S C, Goulden M Let al., 2001. Factors controlling long-and short-term sequestration of atmospheric CO2 in a mid-latitude forest.Science, 294: 1688–1691.
Berbigier P, Bonnefond J-M, Mellmann P, 2001. CO2 and water vapour fluxes for 2 years above Euroflux forest site.Agricultural and Forest Meteorology, 108: 183–1975.
Black T A, den Hartog G, Neumann Het al., 1996. Annual cycles of CO2 and water vapor fluxes above and within a Boreal Aspen Stand.Global Change Biology, 2: 219–230.
Blaken P D, Black T A, Neumann H Het al., 2001. The seasonal water and energy exchange above and within a boreal aspen forest.Journal of Hydrology, 245: 118–136.
Greco S, Baldocchi D D, 1996. Seasonal variation of CO2 and water vapour exchange rates over a temperate deciduous forest.Global Change Biology, 2: 183–197.
Goulden M L, Daube B C, Fan S-Met al., 1997. Physiological responses of a black spruce forest to weather.Journal of Geophysical Research, 102: 96–101.
Goulden M L, Munger J W, Fan S-Met al., 1996. Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation of accuracy.Global Change Biology, 2: 169–182.
Goulden M L, Wofsy S C, Harden J Wet al., 1998. Sensitivity of boreal forest carbon balance to soil thaw.Science, 279: 214–217.
Kellomaki S, Wang Kaiyun, 1999. Short-term environmental controls of heat and water vapour fluxes above a boreal coniferous forest: model computations compared with measurements by eddy correlation.Ecological Modelling, 124: 145–173.
Law B E, Falge E, Gu Let al., 2002. Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation.Agricultural and Forest Meteorology, 113: 97–120.
Lee X, 1998. On micrometeorological observations of surface-air exchange over tall vegetation.Agricultural and Forest Meteorology, 91: 39–50
Lee X, Hu X Z, 2002. Forest-air fluxes of carbon, water and energy over non-flat terrain.Boundary—Layer Meteorology, 103: 277–301.
Lindroth A, Grelle A, Moren A S, 1998. Long-term measurements of boreal forest carbon balance reveal large temperature sensitivity.Global Change Biology, 4: 443–450.
Jarvis P G, Massheder J M, Hale S Eet al., 1997. Seasonal variation of carbon dioxide, water vapour and energy exchanges of a boreal black spruce forest.Journal of Geophysical Research, 102: 66–73.
Valentini R, Matteucci G, Dolman A Jet al., 2000. Respiration as the main determinant of carbon balance in European forests.Nature, 404: 861–865.
Pilegaard K, Hummelshøjb P, Jensen N Oet al., 2001. Two years of continuous CO2 eddy-flux measurements over a Danish beech forest.Agricultural and Forest Meteorology, 107: 29–41.
Webb E K, Pearman G I, Leuning R, 1980. Correction of flux measurement for density effects due to heat and water vapour transfer.Quarterly Journal Royal Meteorological Society, 106: 85–100.
Wofsy S C, Goulden M L, Munger J Wet al., 1993. Net exchange of CO2 in a mid-latitude forest.Science, 260: 1314–1317.
Zhang Yongqiang, Shen Yanjun, Liu Changminget al., 2002. Measurement and analysis of water, heat and CO2 flux from a farmland in the North China Plain.Acta Geographica Sinica, 57(3): 333–342. (in Chinese)
Zhu Zhilin, Sun Xiaomin, Zhang Renhua, 2001. The observation and analysis of sensible and latent fluxes of typical surface in Huaihe River Basin.Climatic and Environmental Research, 6(2): 214–220. (in Chinese)
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Xuefa, W., Guirui, Y., Xiaomin, S. et al. Net water vapour exchange over a mixed needle and broad-leaved forest in Changbai Mountain during autumn. J. Geogr. Sci. 13, 463–468 (2003). https://doi.org/10.1007/BF02837885
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DOI: https://doi.org/10.1007/BF02837885