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Influence of Source/Sink Distributions on Flux–Gradient Relationships in the Roughness Sublayer Over an Open Forest Canopy Under Unstable Conditions

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Abstract

The flux–gradient relationships in the unstable roughness sublayer (RSL) over an open canopy of black spruce forest were examined using long-term observations from an instrumented tower. The observed gradients normalised with the surface fluxes and height above the zero-plane displacement showed differences from a universal function established in the surface layer. The magnitude of differences was not constant throughout the year even at the same observation height. Also the magnitude of the differences was different for each scalar, and scalar similarity in the context of the flux–gradient relationship did not always hold. The variation of the differences was explained by the relative contribution of overstorey vegetation to the total flux from the entire ecosystem. This suggests that a mismatch of the vertical source/sink distributions between scalars leads to a different strength of the near-field dispersion effect for each scalar, and this resulted in inequality of eddy diffusivity among scalars in the RSL. An empirical method that predicts the magnitude of differences is proposed. With this method, it is possible to estimate the eddy diffusivity of scalars provided that the relative contribution of overstorey vegetation to the total flux from the ecosystem is known. Also this method can be used to estimate the eddy diffusivity for scalars whose primary sources are at ground level, such as methane and nitrous oxide.

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References

  • Bergström H, Högström U (1989) Turbulent exchange above a pine forest. Part II: orgnized structures. Boundary-Layer Meteorol 49: 231–263

    Article  Google Scholar 

  • Bosveld FC (1997) Derivation of fluxes from profiles over a moderately homogeneous forest. Boundary-Layer Meteorol 84: 289–327

    Article  Google Scholar 

  • Brutsaert W (1982) Evaporation into the atmosphere. D. Reidel Publishing Company, Dordrecht, p 299

    Google Scholar 

  • Burba GG, McDermitt DK, Grelle A, Anderson DJ, Xu LK (2008) Addressing the influence of instrument surface heat exchange on the measurements of CO2 flux from open-path gas analyzers. Glob Change Biol 14: 1854–1876. doi:10.1111/j.1365-2486.2008.01606.x

    Article  Google Scholar 

  • Businger JA, Wyngaard JC, Izumi Y, Bradley EF (1971) Flux–profile relationships in the atmospheric surface layer. J Atmos Sci 28: 181–189

    Article  Google Scholar 

  • Cellier P, Brunet Y (1992) Flux-gradient relationships above tall plant canopies. Agric For Meteorol 58: 93–117

    Article  Google Scholar 

  • Chen F, Schwerdtfeger P (1989) Flux-gradient relationships for momentum and heat over a rough natural surface. Q J Roy Meteorol Soc 115: 335–352

    Article  Google Scholar 

  • Coppin PA, Raupach MR, Legg BJ (1986) Experiments on scalar dispersion within a model plant canopy. Part II: an elevated plane source. Boundary-Layer Meteorol 35: 167–191

    Article  Google Scholar 

  • Denmead OT, Bradley EF (1985) Flux-gradient relationships in a forest canopy. In: Hutchison BA, Hicks BB (eds) The forest–atmosphere interaction. D. Reidel Publishing Company, Dordrecht, pp 421–442

    Google Scholar 

  • Dias NL, Brutsaert W (1996) Similarity of scalars under stable conditions. Boundary-Layer Meteorol 80: 355–373

    Article  Google Scholar 

  • Dyer AJ (1967) The turbulent transport of heat and water vapour in an unstable atmosphere. Q J Roy Meteorol Soc 93: 715–721

    Article  Google Scholar 

  • Dyer AJ (1974) A review of flux–profile relationships. Boundary-Layer Meteorol 7: 363–372

    Article  Google Scholar 

  • Dyer AJ, Bradley EF (1982) An alternative analysis of flux–gradient relationships at the 1976 ITCE. Boundary-Layer Meteorol 22: 3–19

    Article  Google Scholar 

  • Finnigan JJ (1979) Turbulence in waving wheat. Part I: mean statistics and Honami. Boundary-Layer Meteorol 16: 181–211

    Article  Google Scholar 

  • Gao W, Shaw RH, Paw U KT (1989) Observation of organized structure in turbulent flow within and above a forest canopy. Boundary-Layer Meteorol 47: 349–377

    Article  Google Scholar 

  • Garratt JR (1978) Flux profile relations above tall vegetation. Q J Roy Meteorol Soc 104: 199–211

    Article  Google Scholar 

  • Garratt JR (1980) Surface influence upon vertical profiles in the atmospheric near-surface layer. Q J Roy Meteorol Soc 106: 803–819

    Article  Google Scholar 

  • Garratt JR (1983) Surface influence upon vertical profiles in the nocturnal boundary layer. Boundary-Layer Meteorol 26: 69–80

    Article  Google Scholar 

  • Garratt JR (1992) The atmospheric boundary layer. Cambridge University Press, U.K., p 316

    Google Scholar 

  • Grelle A, Burba G (2007) Fine-wire thermometer to correct CO2 fluxes by open-path analyzers for artificial density fluctuations. Agric For Meteorol 147: 48–57. doi:10.1016/j.agrformet.2007.06.007

    Article  Google Scholar 

  • Harazono Y, Mano M, Miyata A, Yoshimoto M, Zulueta RC, Vourlitis GL, Kwon H, Oechel WC (2006) Temporal and spatial differences of methane flux at arctic tundra in Alaska. Mem Natl Inst Polar Res 59: 79–95

    Google Scholar 

  • Hicks BB, Hess GD, Wesely ML (1979) Analysis of flux–profile relationships above tall vegetation—an alternative view. Q J Roy Meteorol Soc 105: 1074–1077

    Google Scholar 

  • Hirata R, Mogami THJ, Fujinuma Y, Inukai K, Saigusa N, Yamamoto S (2005) CO2 flux measured by an open-path system over a larch forest during the snow-covered season. Phyton 45: 347–351

    Google Scholar 

  • Högström U (1988) Non-dimensional wind and temperature profiles in the atmospheric surface layer: a re-evaluation. Boundary-Layer Meteorol 42: 55–78

    Article  Google Scholar 

  • Högström U, Bergström H, Smedman AS, Halldin S, Lindroth A (1989) Turbulent exchange above a pine forest. Part I: fluxes and gradients. Boundary-Layer Meteorol 49: 197–217

    Article  Google Scholar 

  • Kaimal JC, Finnigan JJ (1994) Atmospheric boundary layer flows. Oxford University Press, Oxford, p 289

    Google Scholar 

  • Kim Y, Ueyama M, Nakagawa F, Tsunogai U, Harazono Y, Tanaka N (2007) Assessment of winter fluxes of CO2 and CH4 in boreal forest soils of central Alaska estimated by the profile method and the chamber method: a diagnosis of methane emission and implications for the regional carbon budget. Tellus 59B: 223–233

    Google Scholar 

  • Legg BJ, Raupach MR, Coppin PA (1986) Experiments of scalar dispersion within a model plant canopy. Part III: an elevated line source. Boundary-Layer Meteorol 35: 277–302

    Article  Google Scholar 

  • Mahrt L, Lee X, Black A, Neumann H, Staebler RM (2000) Nocturnal mixing in a forest subcanopy. Agric For Meteorol 101: 67–78

    Article  Google Scholar 

  • Miyata A, Leuning R, Denmead OT, Kim J, Harazono Y (2000) Carbon dioxide and methane fluxes from an intermittently flooded paddy field. Agric For Meteorol 102: 287–303

    Article  Google Scholar 

  • Mölder M, Grelle A, Lindroth A, Halldin S (1999) Flux–profile relationships over a boreal forest—roughness sublayer corrections. Agric For Meteorol 98–99: 645–658

    Article  Google Scholar 

  • Monin AS, Obukhov AM (1954) Basic laws of turbulent mixing in the surface layer of the atmosphere. Tr Akad Nauk SSSR Geophiz Inst 24: 163–187

    Google Scholar 

  • Ono K, Miyata A, Yamada T (2008) Apparent downward CO2 flux observed with open-path eddy covariance over a non-vegetated surface. Theor Appl Climatol 92: 195–208. doi:10.1007/s00704-007-0323-3

    Article  Google Scholar 

  • Raupach MR (1979) Anomalies in flux–gradient relationships over forest. Boundary-Layer Meteorol 16: 467–486

    Article  Google Scholar 

  • Raupach MR (1988) Canopy transport processes. In: Steffen WL, Denmead OT (eds) Flow and transport in the natural environment. Springer, Berlin, pp 95–127

    Google Scholar 

  • Raupach MR (1994) Simplified expressions for vegetation roughness length and zero-plane displacement as functions of canopy height and area index. Boundary-Layer Meteorol 71: 211–216

    Article  Google Scholar 

  • Raupach MR, Stewart JB, Thom AS (1979) Comments on the paper ‘analysis of flux–profile relationships above tall vegetation—an alternative view’ by B. B. Hicks, G. D. Hess and M. L. Wesely (Q. J. 105, 1074–1077) I. Q J Roy Meteorol Soc 105: 1077–1078

    Article  Google Scholar 

  • Raupach MR, Coppin PA, Legg BJ (1986) Experiments on scalar dispersion within a model plant canopy. Part I: the turbulent structure. Boundary-Layer Meteorol 35: 21–52

    Article  Google Scholar 

  • Raupach MR, Finnigan JJ, Brunet Y (1996) Coherent eddies and turbulence in vegetation canopies: the mixing-layer analogy. Boundary-Layer Meteorol 78: 351–382

    Article  Google Scholar 

  • Shaw RH, Brunet Y, Finnigan JJ, Raupach MR (1995) A wind tunnel study of air flow in waving wheat: two-point velocity statistics. Boundary-Layer Meteorol 76: 349–376

    Article  Google Scholar 

  • Simpson IJ, Edwards GC, Thurtell GW, den Hartog G, Neumann HH, Staebler RM (1997) Micrometeorological measurements of methane and nitrous oxide exchange above a boreal aspen forest. J Geophys Res 102: 29331–29341

    Article  Google Scholar 

  • Simpson IJ, Thurtell GW, Neumann HH, den Hartog G, Edwards GC (1998) The validity of similarity theory in the roughness sublayer above forests. Boundary-Layer Meteorol 87: 69–99

    Article  Google Scholar 

  • Thom AS, Stewart JB, Oliver HR, Gash JHC (1975) Comparison of aerodynamic and energy budget estimates of fluxes over a pine forest. Q J Roy Meteorol Soc 101: 93–105

    Article  Google Scholar 

  • Ueyama M, Harazono Y, Ohtaki E, Miyata A (2006a) Controlling factors on the interannual CO2 budget at a subarctic black spruce forest in interior Alaska. Tellus 58B: 491–501

    Google Scholar 

  • Ueyama M, Harazono Y, Okada R, Nojiri A, Ohtaki E, Miyata A (2006b) Micrometeorological measurements of methane flux at a boreal forest in central Alaska. Mem Natl Inst Polar Res 59: 156–167

    Google Scholar 

  • Vickers D, Mahrt L (1997) Quality control and flux sampling problems for tower and aircraft data. J Atmos Oceanic Technol 14: 512–526

    Article  Google Scholar 

  • Webb EK, Pearman GI, Leuning R (1980) Correction of flux measurements for density effects due to heat and water vapour transfer. Q J Roy Meteorol Soc 106: 85–100

    Article  Google Scholar 

  • Wilson JD (1989) Turbulent transport within the plant canopy. In: Black T, Spittlehouse D, Novak M, Price D (eds) Estimation of areal evapotranspiration. IAHS Press, Wallingford, pp 43–80

    Google Scholar 

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Correspondence to Hiroki Iwata.

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Iwata, H., Harazono, Y. & Ueyama, M. Influence of Source/Sink Distributions on Flux–Gradient Relationships in the Roughness Sublayer Over an Open Forest Canopy Under Unstable Conditions. Boundary-Layer Meteorol 136, 391–405 (2010). https://doi.org/10.1007/s10546-010-9513-0

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  • DOI: https://doi.org/10.1007/s10546-010-9513-0

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