Productivity and CO 2 Exchange of Great Plains Ecoregions. I. Shortgrass Steppe: Flux Tower Estimates

Gilmanov, Tagir G.; Morgan, Jack A.; Hanan, Niall P.; Wylie, Bruce K.; Rajan, Nithya; Smith, David P.; Howard, Daniel M.

doi:10.1016/j.rama.2017.06.007

Rangeland Ecology & Management

2017

DOI: 10.1016/j.rama.2017.06.007

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Productivity and CO 2 Exchange of Great Plains Ecoregions. I. Shortgrass Steppe: Flux Tower Estimates

Tagir G. Gilmanov¹,

Jack A. Morgan²,

Niall P. Hanan³

et al.

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Cited by 8 publications

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“…Some comparisons between EC and BREB methods yielded similar results (Dugas et al, 2001; Wolf et al, 2008), whereas Alfieri et al (2009) found considerable differences between the methods for measurement of surface fluxes. Gilmanov et al (2017) and Skinner and Wagner‐Riddle (2012) identified the need for annual studies comparing EC and BREB to evaluate historical BREB data for integration with current EC network data. The BREB systems are commonly used to estimate evapotranspiration (Irmak et al, 2014; Vanomark et al, 2018).…”

mentioning

confidence: 99%

Nutrient Source and Tillage Effects on Maize: I. Micrometeorological Methods for Measuring Carbon Dioxide Emissions

O'Dell

Eash

Hicks³

et al. 2019

Agrosystems Geosci & Env

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Core Ideas Aerodynamic methods can be used to gap‐fill Bowen ratio energy balance micrometeorological measurements. Eddy covariance and Bowen ratio energy balance methods agree during turbulent daytime conditions. Measuring nighttime net ecosystem exchange is challenging using turbulence‐based micrometeorology. There is a need to understand the potential benefits of using the biotechnology waste by‐product from manufacturing as a fertilizer replacement in agriculture, by quantifying the economic value for the farmer and measuring the environmental impact. Measuring CO2 emissions can be used to assess environmental impact, including three widely used micrometeorological methodologies: (i) the Bowen Ratio Energy Balance (BREB), (ii) aerodynamic flux‐gradient theory, and (iii) eddy covariance (EC). As a first step in quantifying benefits of applying biotechnology waste in agriculture, a detailed examination of these three methods was conducted to understand their effectiveness in quantifying CO2 emissions for this specific circumstance. The study measured micrometeorological properties over a field planted to maize (Zea mays L. var. indentata), one plot treated with biotechnology waste applied as a nutrient amendment, and one plot treated with a typical farmer fertilizer practice. Carbon dioxide flux measurements took place over 1 yr, using both BREB and EC systems. The aerodynamic method was used to gap‐fill BREB system measurements, and those flux estimates were compared with estimates produced separately by the aerodynamic and EC methods. All methods found greater emissions over the biotechnology waste application. The aerodynamic method CO2 flux estimates were considerably greater than both the EC and a combined BREB‐aerodynamic approach. During the day, the EC and BREB methods agree. At night, the aerodynamic approach detects and accounts for buildup of CO2 at the surface during stable periods. The BREB systems combined with aerodynamic approaches provide alternate methods to EC in examining micrometeorological properties near the surface.

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mentioning

confidence: 99%

Nutrient Source and Tillage Effects on Maize: I. Micrometeorological Methods for Measuring Carbon Dioxide Emissions

O'Dell

Eash

Hicks³

et al. 2019

Agrosystems Geosci & Env

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CO2 exchanges and evapotranspiration of a grazed pasture under tropical climate conditions

Bezerra

Silva

Mendes

et al. 2022

Agricultural and Forest Meteorology

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