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Energy flux partitioning over the Amazon forest

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Summary

The present study involved determination of the experimental energy receipt partitioning over the tropical Amazon forest. Diurnal variation of net radiation (Q *), sensible heat flux (Q H) and latent heat flux (Q E) is presented. The daytimeQ E is in phase withQ * and it is always an important term in the energy balance. The daily averagedQ E is 59 to 100% of the dailyQ * whereasQ H is 5 to 28% at the Amazon forest site (2° 57′ S; 59° 57′ W) for the sample periods. The results present evidence thatQ E over the Amazon forest is greater thanQ * in the afternoon hours. The role of sensible heat advection in maintaining largeQ E over the forest surface is discussed. Hourly Bowen ratio (β) values for two campaigns of the Amazon forest micrometeorological experiment are presented. During daylight hours, the differences inβ are not significant, and exhibit a systematic pattern. The only time that the variation in Bowen ratio increased significantly was at sunrise and sunset when the thermal structure of the air was changing from a strong inversion to lapse and vice versa. The diurnalβ values changed from −3.50 to 0.85. The mean hourlyβ calculated from values from 07.00 to 16.00 h, varied from 0.05 to 0.85.

Zusammenfassung

Diese Studie beschäftigt sich mit der Aufteilung der empfangenen Energie über dem tropischen Amazonasurwald. Es wird der Tagesgang der Strahlungsbilanz (Q *), des fühlbaren (Q H) und des latenten Wärmestromes (Q E) vorgestellt. Während der Tagesstunden istQ E in Phase mitQ * und ist immer ein wichtiger Term der Energiebilanz. Das Tagesmittel vonQ E beträgt 59 bis 100%,Q H 5 bis 28% des täglichenQ * an den Meßtagen bei der Amazonasurwaldstation (2° 57′ S; 59° 57′ W). Die Ergebnisse legen nahe, daß in den NachmittagsstundenQ E über dem Amazonasurwald größer ist alsQ *. Die Rolle der Advektion von fühlbarer Wärme zur Aufrechterhaltung des großenQ E über der Waldoberfläche wird diskutiert. Für zwei Meßkampagnen wurden die stündlichen Bowenverhältnisse (β) vorgestellt. Während der Tagesstunden ergaben sich keine signifikanten Änderungen vonβ, während bei Sonnenaufgang und -untergang, wenn der thermische Aufbau der Luft von einer starken Inversion zu neutral und umgekehrt wechselt, die Unterschiede deutlich anstiegen. Die Tageswerte vonβ lagen zwischen −3.50 und 0.85. Die Stundenmittel von 7.00 bis 16.00 Uhr schwankten zwischen 0.05 und 0.85.

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References

  • Anderson, M. C., 1964: Studies of the woodland light climate. II. Seasonal variation in the seasonal light climate.J. Ecol. 52, 643–663.

    Google Scholar 

  • André, R. G. B., Viswanadham, Y., 1983: Radiation balance of soybeans grown in Brazil.Agric. Meteor. 30, 157–173.

    Google Scholar 

  • Baldocchi, D. D., Matt, D. R., Hutchinson, B. A., McMillan, R. T., 1984: Solar radiation within an oak-hickory forest: An evaluation of the extinction coefficients for several radiation components during fully-leafed and leafless periods.Argic. Forest Meteor. 32, 307–322.

    Google Scholar 

  • Black, T. A., McNaughton, K. G., 1971: Psychometric apparatus for Bowen-ratio determination over forests.Bound.-Layer. Meteor. 2, 246–254.

    Google Scholar 

  • Bowen, I. S., 1926: The ratio of heat losses by conduction and by evaporation from any water surface.Phys. Rev. 27, 779–787.

    Google Scholar 

  • Bradley, E. F., 1968: A micrometeorological study of velocity profiles and surface drag in the region modified by a change in surface roughness.Quart. J. R. Meteor. Soc. 94, 361–379.

    Google Scholar 

  • Brinkmann, W. L. F., Santos, A., 1971: Natural waters in amazonia. V. Soluble magnesium properties. Turrialba,21, 459–465.

    Google Scholar 

  • Calder, I. R., 1976: The measurement of water losses from a forest area using a “natural” lysimeter.J. Hydrol. 30, 311–325.

    Google Scholar 

  • Colwell, J. E., 1977: Vegetation canopy reflectance.Remote Sensing Environ. 3, 175–183.

    Google Scholar 

  • Decico, A., Santos, H. M., Ribeiro, M. N. G., Salati, E., 1977: Estudos Climatológicos da Reserva Florestal Ducke, Manaus, Am.Acta Amazonica 7, 485–494.

    Google Scholar 

  • Denmead, O. J., 1969: Comparative micrometeorology of a wheat field and a forest of pinus radiation.Agric. Meteor. 6, 357–371.

    Google Scholar 

  • Droppo, J. G., Hamilton, H. L., 1973: Experimental variability in the determination of the energy balance in a deciduous forest.J. Appl. Meteor. 12, 781–791.

    Google Scholar 

  • Floyed, B. W., Burley, J. W., Noble, R. D., 1978: Foliar development effects on forest floor light quality.For. Sci. 24, 445–451.

    Google Scholar 

  • Fritschen, L. J,. Gay, L., Holbo, R., 1973: Estimating evapotranspiration from forests by meteorological and lysimetric methods. Paper presented at the AGU Symposium on Evaporation and Transpiration from Natural Terrain, Chairman R. Lee, San Francisco, 12 December 1973.

  • Fritschen, L. J., Hsia, J., Doraiswamy, P., 1977: Evapotranspiration of a douglas fir determined with a weighing lysimeter.Water Resour. Res. 13, 145–148.

    Google Scholar 

  • Gash, J. H. C., Stewart, J. B., 1975: The average surface resistance of a pine forest derived from Bowen ratio measurements.Bound.-Layer Meteor. 8, 453–464.

    Google Scholar 

  • Gay, L. W. K., Knoerr, R., Braaten, M. O., 1971: Solar radiation variability in the floor of a pine plantation.Agric. Meteor. 3, 39–50.

    Google Scholar 

  • Geiger, R., 1950:The Climate near the Ground. Cambridge, Mass.: Harvard University Press, 611 pp.

    Google Scholar 

  • Glesinger, E., 1962:Forest Influences. Rome: F.A.O., 307 pp.

    Google Scholar 

  • Hauschildt, P., 1984: Radiation balance studies in a mature mixed forest and at a field site at the Petawawa National Forestry Institute, Chalk River, Ontario. M.Sc. Thesis, Dept. of Geography, Queen's Univ., Kingston, Ontario. 108 pp.

    Google Scholar 

  • Hicks, B. B., Hyson, P., Moore, C. J., 1975: A study of eddy fluxes over a forest.J. Appl. Meteor. 14, 58–66.

    Google Scholar 

  • Holdridge, L. R., Grenke, W. C., Hatheway, W. H., Liang, T., Tosi, J. A., 1971:Forest Environments in Tropical Life Zones, a Pilot Study. New York: Pergamon Press, 747 pp.

    Google Scholar 

  • Horn, H. S., 1971:The Adaptive Geometry of Trees. Princeton: Princeton University Press, 144 pp.

    Google Scholar 

  • Hutchinson, B. A., 1979:Forest Meteorology. Research Needs for Energy and Resource Limited Future. Proceedings of Workshop, 28–30 August 1978, Ottawa, Canada. USDOE Technical Information Center, Oak Ridge, Tenn.

    Google Scholar 

  • Hutchinson, B. A., Matt, D. R., 1976: Beam enrichment of diffuse radiation in a deciduous forest.Agric. Meteor. 17, 93–110.

    Google Scholar 

  • Hutchinson, B. A., Matt, D. R., 1977: The distribution of solar radiation within a deciduous forest.Ecolog. Monogr. 47, 198–207.

    Google Scholar 

  • Hyson, P., Hicks, B. B., 1975: A single-beam infrared hygrometer for evaporation measurement.J. Appl. Meteor. 14, 301–307.

    Google Scholar 

  • Instituto de Pesquisas e Experimentação Agropecuária do Norte (IPEAN), 1969: Os Solos da Área Manaus — Itacoatiara.Serie Estudos e Ensaios, Belém,1, 1–177.

    Google Scholar 

  • Jarvis, P. G., James, G. B., Landsberg, J. J., 1976: Coniferous forests. In:Vegetation and the Atmosphere. Vol. 2, Case Studies (Monteith, J. L., ed.). London: Acad. Press, 171–240.

    Google Scholar 

  • Jordan, C. F., Heuveldop, J., 1981: The water budget of an Amazonian rain forest.Acta Amazonia 11, 87–92.

    Google Scholar 

  • Lettau, H., Lettau, K., Molion, L. C. B., 1979: Amazonia's hydrologic cycle and the role of atmospheric recycling in assessing deforestation effects.Mon. Wea. Rev. 107, 227–238.

    Google Scholar 

  • Lindroth, A., 1985: Canopy conductance of coniferous forests related to climate.Water Resour. Res. 21, 297–304.

    Google Scholar 

  • Lloyd, C. R., Shuttleworth, W. J., Gash, J. H. C., Turner, M., 1984: A microprocessor system for eddy-correlation.Agric. Forest Meteor. 33, 67–80.

    Google Scholar 

  • Manzi, A. O., Viswanadham, Y., Sá, L. D. A., André, R. G. B., 1984: Um Estudo sobre o Balanço de Radiação da Floresta Amazônica. Report no. INPE-3956-PRE/974, INPE, São José dos Campos, SP, Brazil (in Portuguese).

    Google Scholar 

  • Marques Filho, A. O., Ribeiro, M. N. G., Santos, H. M., Santos, J. M., 1981: Estudos Climatológicos da Reserva Florestal Ducke, Manaus, Am.Acta Amazonica 11, 759–768.

    Google Scholar 

  • McCaughey, J. H., 1978: Estimation of net radiation for a coniferous forest and the effects of logging on net radiation and the reflection coefficient.Can. J. Forest Res. 8, 450–455.

    Google Scholar 

  • McCaughey, J. H., 1978: Energy balance and evapotranspiration estimates for a mature coniferous forest.Can. J. Forest Res. 8, 456–462.

    Google Scholar 

  • McCaughey, J. H., 1980: Net radiation at Forest Montmorency, P. Q. Climatol. Bull., McGill Univ.28, 1–10.

    Google Scholar 

  • McCaughey, J. H., 1981: Impact of clearcutting of coniferous forest on the surface radiation balance.J. Appl. Ecol. 18, 815–826.

    Google Scholar 

  • McCaughey, J. H., 1985: A radiation and energy balance study of mature forest and clear-cut sites.Bound.-Layer Meteor. 32, 1–24.

    Google Scholar 

  • McNaughton, K. G., Black, J. A., 1973: A study of evapotranspiration from a douglas-fir forest using the energy balance approach.Water Resour. Res. 9, 1579–1590.

    Google Scholar 

  • McNeil, D. D., Shuttleworth, W. J., 1975: Comparative measurements of the energy fluxes over a pine forest.Bound.-Layer Meteor. 9, 297–313.

    Google Scholar 

  • Miller, P. C., 1969: Solar radiation profiles in opening in canopies of aspen and oak.Science 164, 308–309.

    Google Scholar 

  • Milne, R., 1979: Water loss and canopy resistance of a young sitka spruce plantation.Bound.-Layer Meteor. 16, 67–81.

    Google Scholar 

  • Moore, C. J., 1976a: A comparative study of radiation balance above forest and grassland.Quart. J. Roy. Meteor. Soc. 102, 889–899.

    Google Scholar 

  • Moore, C. J., 1976b: Eddy flux measurements above a pine forest.Quart. J. R. Meteor. Soc. 101, 913–918.

    Google Scholar 

  • Moore, C. J., 1983: On the calibration and temperature behaviour of single-beam infrared hygrometers.Bound.-Layer Meteor. 25, 245–269.

    Google Scholar 

  • Munn, R. E., 1966:Descriptive Micrometeorology. New York: Academic Press, 245 pp.

    Google Scholar 

  • Nimer, E., 1972: Climatologia da Região Norte: Introdução à Climatologia dinâmica.Revista Brasileira de Geografia,34, 124–153.

    Google Scholar 

  • Nnyamah, J. V., Black, T. A., 1977: Rates and patterns of water uptake in a douglas-fir forest.Soil Sci. Soc. Am. J. 41, 972–979.

    Google Scholar 

  • Norman, J. M., Jarvis, P. G., 1974: Photosynthesis in sitka spruce (Picea Sitchensis (Bong) (Carr.)). III. Measurements of canopy structure and interception of radiation.J. Appl. Ecol. 11, 375–398.

    Google Scholar 

  • Norman, J. M., Jarvis, P. G., 1975: Photosynthesis in sitka spruce. V. Radiation penetration theory and a test case.J. Appl. Ecol. 12, 839–878.

    Google Scholar 

  • Nunez, M., Oke, R. R., 1977: The energy balance of urban canyon.J. Appl. Meteor. 16, 11–19.

    Google Scholar 

  • Oke, T. R., 1979: Advectively-assisted evapotranspiration from irrigated urban vegetation.Bound.-Layer Meteor. 17, 167–173.

    Google Scholar 

  • Olson, J. S., Pfuderer, H. A., Chan, Y. H., 1978: Changes in the global carbon cycle and the biosphere. ORNL/EIS-109, Oak Ridge National Lab., Oak Ridge, TN, 169 pp.

    Google Scholar 

  • Pinker, R. J., Thompson, O. E., Eck, T. T., 1980: The albedo of a tropical evergreen forest.Quart. J. Roy. Meteor. Soc. 106, 551–558.

    Google Scholar 

  • Ratisbona, L. R., 1976: The climate of Brazil. In:World Survey of Climatology, Vol. 12 (edited by W. Schwerdt-feger). Amsterdam: Elsevier, 219–293.

    Google Scholar 

  • Rauner, J. L., 1976: Deciduous forests. In:Vegetation and the Atmosphere. Vol. II, J. L. Monteith (Editor). London: Academic Press, 241–264.

    Google Scholar 

  • Reifsnyder, W. E., Furnival, G. M., Horowitz, J. L., 1971: Spatial and temporal distribution of solar radiation beneath forest canopies.Agric. Meteor. 9, 31–37.

    Google Scholar 

  • Ribeiro, M. N. G., Adis, J., 1984: Local rainfall variability — a potential bias for bioecological studies in the central Amazon.Acta Amazonia 14, 159–174.

    Google Scholar 

  • Richards, P. W., 1981:The Tropical Rain Forest. Cambridge, New York: Cambridge University Press, 450 pp.

    Google Scholar 

  • Roberts, J., Pymar, C. F., Wallace, J. S., Pitman, R. H., 1980: Seasonal changes in leaf area, stomatal and canopy conductances and transpiration from bracken below a forest canopy.J. Appl. Ecol. 17, 409–422.

    Google Scholar 

  • Ross, J., 1976: Radiative transfer in plant communities. In:Vegetation and the Atmosphere. Vol. I, J. L. Monteith (Editor). London: Academic Press, 13–55.

    Google Scholar 

  • Ross, J., 1981:The Radiation Regime and Architecture of Plant Stands. The Hague: W. Junk (Publishers), 391 pp.

    Google Scholar 

  • Rutter, A. J., 1972: Evaporation from forests. In:Research Papers in Forest Meteorology. Aberystwyth: Cambrian News (Aberystwyth) Ltd., 75–90.

    Google Scholar 

  • Scholl, D. G., 1976: Soil moisture flux and evapotranspiration determined from soil hydraulic properties in a chaparral stand.Soil Sci. Soc. Am. J. 40, 14–18.

    Google Scholar 

  • Shuttleworth, W. J., McNeil, D. D., Moore, C. J., 1982: A switched continuous-wave sonic anemometer for measuring suring surface heat fluxes.Bound.-Layer Meteor. 23, 425–448.

    Google Scholar 

  • Shuttleworth, W. J., Gash, J. H. C., Lloyd, C. R., Moore, C. J., Roberts, J., Marques Filho, A. O., Fisch, G., Silva Filho, V. P., Ribeiro, M. N. G., Molion, L. C. B., Sá, L. D. A., Nobre, J. C. A., Cabral, O. M. R., Patel, S. R., Moraes, J. C., 1984a: Eddy correlation measurements of energy partition for Amazonian forest.Quart. J. R. Met. Soc. 110, 1143–1162.

    Google Scholar 

  • Shuttleworth, W. J., Gash, J. H. C., Lloyd, C. R., Moore, C. J., Roberts, J., Marques Filho, A. O., Fisch, G., Silva Filho, V. P., Ribeiro, M. N. G., Molion, L. C. B., Sá, L. D. A., Nobre, C. A., Cabral, O. M. R., Patel, S. R., Moraes, J. C., 1984b: Observations of radiation exchange above and below Amazonian forest.Quart. J. R. Meteor. Soc. 110, 1163–1169.

    Google Scholar 

  • Sinclair, T. R., Knoerr, K. R., 1982: Distribution of photosynthetically active radiation in the canopy of a lablolly pine plantation.J. Appl. Ecol. 19, 183–191.

    Google Scholar 

  • Spittlehouse, D. L., Black, T. A., 1979: Determination of forest evapotranspiration using Bowen ratio and eddy correlation measurements.J. Appl. Meteor. 18, 647–653.

    Google Scholar 

  • Spittlehouse, D. L., Black, T. A., 1980: Evaluation of the Bowen ratio/energy balance method for determining forest evapotranspiration.Atmosphere-Ocean 18, 98–116.

    Google Scholar 

  • Stewart, J. B., Thom, A. S., 1973: Energy budgets in pine forest.Quart. J. R. Meteor. Soc. 99, 154–170.

    Google Scholar 

  • Tajchman, S. J., 1972: The radiation and energy balance of coniferous and deciduous forests.J. Appl. Ecol. 9, 359–375.

    Google Scholar 

  • Tajchman, S. J., 1981: Comments on measuring turbulent exchange within and above forest canopy.Bull. Am. Meteor. Soc. 62, 1550–1559.

    Google Scholar 

  • Takeuchi, M., 1961: The structure of the Amazonian vegetation—II. Tropical rain forest.Jour. Fac. Sci. Tokyo Univ., Section III. Botany 8, 1–26.

    Google Scholar 

  • Tan, C. S., Black, T. A., 1976: Factors affecting the canopy resistance of a douglas-fir forest.Bound.-Layer Meteor. 10, 475–488.

    Google Scholar 

  • Tan, C. S., Black, T. A., Nnyamah, J. U., 1977: Characteristics of stomatal diffusion resistance in a douglas fir forest exposed to soil water deficits.Can. J. Forest Res. 7, 595–604.

    Google Scholar 

  • Tan, C. S., Black, T. A., Nnyamah, J. U., 1978: A simple diffusion model of transpiration applied to a thinned douglas-fir stand.Ecology 59, 1221–1229.

    Google Scholar 

  • Thom, A. S., Stewart, J. B., Oliver, H. R., Gash, J. H. C., 1975: Comparison of aerodynamic and energy budget estimates of fluxes over a pine forest.Quart. J. R. Meteor. Soc. 101, 93–105.

    Google Scholar 

  • Thompson, J. R., 1975: Energy budget for three small plots — substantiation of Priestley and Taylor's large-scale evaporation parameter.J. Appl. Meteor. 14, 1399–1401.

    Google Scholar 

  • Thompson, N., 1979: Turbulence measurements above a pine forest.Bound.-Layer Meteor. 16, 293–310.

    Google Scholar 

  • Thompson, D. R., Hinckley, T. M., 1977: Effect of vertical and temporal variations in stand microclimate and soil moisture on water status of several species in an oak-hickory forest.Am. Midl. Nat. 97, 373–380.

    Google Scholar 

  • Vila Nova, W., Salati, E., Matsui, E., 1976: Estimativa da Evapotranspiração na Bacia Amazônica.Acta Amazonica 6, 215–228.

    Google Scholar 

  • Viswanadham, Y., André, R. G. B., 1983: Energy balance of soybeans grown in Brazil.Arch. Met. Geoph. Biocl., Ser. B 33, 141–157.

    Google Scholar 

  • Warhaft, Z., 1976: Heat and moisture flux in the stratified boundary-layer.Quart. J. R. Met. Soc. 102, 703–704.

    Google Scholar 

  • Wenger, C. F., 1984:Forestry Handbook. New York: John Wiley and Sons, 1335 pp.

    Google Scholar 

  • Williams, R. J., Broesma, K., Ryswyk, A. L. van, 1978: Equilibrium and actual evapotranspiration from a very dry vegetated surface.J. Appl. Meteor. 17, 1827–1832.

    Google Scholar 

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  1. Instituto de Pesquisas Espaciais, Ministério de Ciência e Tecnologia, São José dos Campos, Brazil

    L. D. de Abreu Sá, Y. Viswanadham & A. O. Manzi

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de Abreu Sá, L.D., Viswanadham, Y. & Manzi, A.O. Energy flux partitioning over the Amazon forest. Theor Appl Climatol 39, 1–16 (1988). https://doi.org/10.1007/BF00867653

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