Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions

Bonan, G B; Pollard, D; Thompson, S L

doi:10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2

Title: Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions

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Abstract

The statistical representation of multiple land surfaces within a grid cell has received attention as a means to parameterize the nonlinear effects of subgrid-scale heterogeneity on land-atmosphere energy exchange. However, previous analyses have not identified the critical land-surface parameters to which energy exchanges are sensitive; the appropriate number of within-grid-cell classes for a particular parameter, or the effects of interactions among several parameters on the nonlinearity of energy exchanges. The analyses reported here used a land-surface scheme for climate models to examine the effects of subgrid variability in leaf area index, minimum and maximum stomatal resistances, and soil moisture on grid-scale fluxes. Comparisons between energy fluxes obtained using parameter values for the average of 100 subgrid points and the average fluxes for the 100 subgrid points showed minor differences for emitted infrared radiation and reflected solar radiation, but large differences for sensible heat and evapotranspiration. Leaf area index was the most important parameter; stomatal resistances were only important on wet soils. Interactions among parameters increased the nonlinearity of land-atmosphere energy exchange. When considered separately, six to ten values of each parameter greatly reduced the deviation between the two flux estimates. However, this approach became cumbersome when all four parameters variedmore »« less

Authors:

Bonan, G B; Pollard, D; Thompson, S L ^[1]

National Center for Atmospheric Research, Boulder, CO (United States)

Publication Date:: Fri Oct 01 00:00:00 EDT 1993

OSTI Identifier:: 5510563

Resource Type:: Journal Article

Journal Name:: Journal of Climate; (United States)

Additional Journal Information:: Journal Volume: 6:10; Journal ID: ISSN 0894-8755

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; EARTH ATMOSPHERE; ENERGY TRANSFER; EARTH PLANET; BIOLOGICAL EFFECTS; CLIMATE MODELS; LEAVES; SURFACES; GEOGRAPHICAL VARIATIONS; HEAT; INFRARED RADIATION; MOISTURE; SOILS; SOLAR RADIATION; STOMATA; ELECTROMAGNETIC RADIATION; ENERGY; MATHEMATICAL MODELS; OPENINGS; PLANETS; RADIATIONS; STELLAR RADIATION; VARIATIONS; 540110*; 560400 - Other Environmental Pollutant Effects

Citation Formats


                    Bonan, G B, Pollard, D, and Thompson, S L. Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions.  United States: N. p., 1993. 
        Web.  doi:10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2.

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                    Bonan, G B, Pollard, D, & Thompson, S L. Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions.  United States.  https://doi.org/10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2

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                    Bonan, G B, Pollard, D, and Thompson, S L. 1993.  
        "Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions".  United States.  https://doi.org/10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2.

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@article{osti_5510563,

  title        = {Influence of subgrid-scale heterogeneity in leaf area index, stomatal resistance, and soil moisture on grid-scale land-atmosphere interactions},

  author       = {Bonan, G B and Pollard, D and Thompson, S L},

  abstractNote = {The statistical representation of multiple land surfaces within a grid cell has received attention as a means to parameterize the nonlinear effects of subgrid-scale heterogeneity on land-atmosphere energy exchange. However, previous analyses have not identified the critical land-surface parameters to which energy exchanges are sensitive; the appropriate number of within-grid-cell classes for a particular parameter, or the effects of interactions among several parameters on the nonlinearity of energy exchanges. The analyses reported here used a land-surface scheme for climate models to examine the effects of subgrid variability in leaf area index, minimum and maximum stomatal resistances, and soil moisture on grid-scale fluxes. Comparisons between energy fluxes obtained using parameter values for the average of 100 subgrid points and the average fluxes for the 100 subgrid points showed minor differences for emitted infrared radiation and reflected solar radiation, but large differences for sensible heat and evapotranspiration. Leaf area index was the most important parameter; stomatal resistances were only important on wet soils. Interactions among parameters increased the nonlinearity of land-atmosphere energy exchange. When considered separately, six to ten values of each parameter greatly reduced the deviation between the two flux estimates. However, this approach became cumbersome when all four parameters varied independently. These analyses suggest that the debate over how to best parameterize the nonlinear effects of subgrid-scale heterogeneity on land-atmosphere interactions will continue.},

  doi          = {10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2},

  url          = {https://www.osti.gov/biblio/5510563},
  journal      = {Journal of Climate; (United States)},

  issn         = {0894-8755},

  number       = ,

  volume       = 6:10,

  place        = {United States},

  year         = {Fri Oct 01 00:00:00 EDT 1993},

  month        = {Fri Oct 01 00:00:00 EDT 1993}

}

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https://doi.org/10.1175/1520-0442(1993)006<1882:IOSSHI>2.0.CO;2

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