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Agricultural and forest meteorology
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environmental factors
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diurnal variation
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- Author:
- Garrity, Steven R.; Vierling, Lee A.; Bickford, Keith
- Source:
- Agricultural and forest meteorology 2010 v.150 no.3 pp. 489-496
- ISSN:
- 0168-1923
- Subject:
- carbon dioxide; sampling; canopy; solar radiation; measuring devices; soil water content; gas exchange; air temperature; hyperspectral imagery; environmental factors; diurnal variation; seasonal variation; remote sensing; plant physiology; reflectance; accuracy; vegetation; satellites
- Abstract:
- ... Recent advances in understanding relationships between spectral reflectance of vegetation canopies and the structural and physiological drivers of canopy-atmosphere carbon dioxide exchange highlight the potential for using narrowband spectral vegetation indices to spatially scale CO₂ fluxes beyond the area of a tower footprint. However, ground reference observations of narrowband spectral reflecta ...
- DOI:
- 10.1016/j.agrformet.2010.01.004
- https://doi.org/10.1016/j.agrformet.2010.01.004
- Author:
- Marques Filho, E.P.; Sá, L.D.A.; Karam, H.A.; Alvalá, R.C.S.; Souza, A.; Pereira, M.M.R.
- Source:
- Agricultural and forest meteorology 2008 v.148 no.6-7 pp. 883-892
- ISSN:
- 0168-1923
- Subject:
- wetlands; atmospheric circulation; turbulent flow; microclimate; drought; water stress; environmental factors; diurnal variation; meteorological parameters; spatial variation; field experimentation; flooded conditions; biodiversity; surface water; heat transfer; hydrologic cycle; Brazil
- Abstract:
- ... In this manuscript, some micrometeorological characteristics of the Pantanal are presented. This region, one of the greatest wetlands in the world, is located in the central western part of South America. It has very peculiar environmental and ecological characteristics, a great biodiversity and an irregular hydrological cycle, which often presents floods during the wet season and droughts and fir ...
- DOI:
- 10.1016/j.agrformet.2007.12.004
- https://doi.org/10.1016/j.agrformet.2007.12.004
- Author:
- Jeffrey D. Wood; Robert J. Gordon; Claudia Wagner-Riddle
- Source:
- Agricultural and forest meteorology 2013 v.171-172 pp. 295-305
- ISSN:
- 0168-1923
- Subject:
- dairy manure; diurnal variation; emissions; environmental factors; gases; greenhouse gases; manure storage; methane; monitoring; nitrous oxide; surface temperature; tanks; time series analysis; warm season
- Abstract:
- ... Manure slurry storage systems are possible sources of methane (CH4) and nitrous oxide (N2O), both of which are strong greenhouse gases (GHG). The most commonly used methods to measure these emissions rely on chamber techniques deployed at discrete intervals (i.e. non-continuously). Due to long-term and diurnal variations in GHG emissions, discrete sampling may yield biased estimates when integrati ...
- DOI:
- 10.1016/j.agrformet.2012.12.014
- https://doi.org/10.1016/j.agrformet.2012.12.014
- Author:
- Qiang Zhang; Rui Sun; Guoqing Jiang; Ziwei Xu; Shaomin Liu
- Source:
- Agricultural and forest meteorology 2016 v.230-231 pp. 45-57
- ISSN:
- 0168-1923
- Subject:
- Phragmites australis; arid zones; carbon; carbon dioxide; carbon sinks; constructed wetlands; diurnal variation; ecosystems; eddy covariance; energy flow; energy transfer; environmental factors; evapotranspiration; greenhouse gas emissions; greenhouse gases; growing season; heat transfer; humans; irrigation; issues and policy; methane; methane production; models; net ecosystem exchange; seasonal variation; soil depth; soil temperature; summer; uncertainty; China
- Abstract:
- ... Wetlands play an important role in the exchange of carbon and energy between the land and the atmosphere. Moreover, wetlands are sensitive to global changes because of their unique water-heat effects and greenhouse gas (GHG) metabolic processes. However, the temporal variations in carbon and energy fluxes in wetlands are not yet fully understood. As an artificial wetland in an arid area, the Zhang ...
- DOI:
- 10.1016/j.agrformet.2016.02.019
- https://doi.org/10.1016/j.agrformet.2016.02.019
- Author:
- Víctor Resco de Dios; Arthur Gessler; Juan Pedro Ferrio; Josu G. Alday; Michael Bahn; Jorge del Castillo; Sébastien Devidal; Sonia García-Muñoz; Zachary Kayler; Damien Landais; Paula Martín-Gómez; Alexandru Milcu; Clément Piel; Karin Pirhofer-Walzl; Olivier Ravel; Serajis Salekin; David T. Tissue; Mark G. Tjoelker; Jordi Voltas; Jacques Roy
- Source:
- Agricultural and forest meteorology 2017 v.239 pp. 185-191
- ISSN:
- 0168-1923
- Subject:
- beans; canopy; carbon dioxide; circadian rhythm; cotton; diurnal variation; ecosystems; environmental factors; gas exchange; photosynthesis; physiological response; shrubs; stomatal conductance; temperature; vapor pressure
- Abstract:
- ... Studies on the dependence of the rates of ecosystem gas exchange on environmental parameters often rely on the up-scaling of leaf-level response curves (‘bottom-up’ approach), and/or the down-scaling of ecosystem fluxes (‘top-down’ approach), where one takes advantage of the natural diurnal covariation between the parameter of interest and photosynthesis rates. Partly independent from environmenta ...
- DOI:
- 10.1016/j.agrformet.2017.03.014
- https://doi.org/10.1016/j.agrformet.2017.03.014
- Author:
- Laura Morillas; Luis Villagarcía; Francisco Domingo; Héctor Nieto; Olga Uclés; Mónica García
- Source:
- Agricultural and forest meteorology 2014 v.189-190 pp. 140-158
- ISSN:
- 0168-1923
- Subject:
- air temperature; arid lands; diurnal variation; ecosystems; eddy covariance; energy; environmental factors; evapotranspiration; grasslands; heat transfer; models; water stress; wind speed
- Abstract:
- ... The temperature-based two-source model (TSM) of Norman et al. (1995) has not been properly evaluated under the water stress conditions that are typical in natural Mediterranean drylands. In such areas, the asynchrony between precipitation and energy supply strongly reduces evapotranspiration, E (or latent heat flux, LE, if expressed in energy terms), making sensible heat flux (H) the dominant turb ...
- DOI:
- 10.1016/j.agrformet.2014.01.018
- https://doi.org/10.1016/j.agrformet.2014.01.018
- Author:
- Houborg, Rasmus; Anderson, Martha C.; Norman, John M.; Wilson, Tim; Meyers, Tilden
- Source:
- Agricultural and forest meteorology 2009 v.149 no.11 pp. 1875-1895
- ISSN:
- 0168-1923
- Subject:
- primary productivity; gas exchange; leaf area index; vegetation cover; carbon; seasonal variation; grasslands; water vapor; forests; estimation; carbon dioxide; stomatal conductance; mechanistic models; elevated atmospheric gases; ecosystems; photosynthesis; soil-atmosphere interactions; leaves; simulation models; soil-plant-atmosphere interactions; quantitative analysis; relative humidity; agricultural land; equations; radiation use efficiency; accuracy; evapotranspiration; canopy; environmental factors; water; diurnal variation; heat transfer; energy transfer; light; United States
- Abstract:
- ... Biophysical models intended for routine applications at a range of scales should attempt to balance the competing demands of generality and simplicity and be capable of realistically simulating the response of CO₂ and energy fluxes to environmental and physiological forcings. At the same time they must remain computationally inexpensive and sufficiently simple to be effectively parameterized at th ...
- Handle:
- 10113/37392
- DOI:
- 10.1016/j.agrformet.2009.06.014
- https://doi.org/10.1016/j.agrformet.2009.06.014
- Author:
- V. Manstretta; V. Rossi
- Source:
- Agricultural and forest meteorology 2015 v.207 pp. 83-93
- ISSN:
- 0168-1923
- Subject:
- Aspergillus flavus; Fusarium graminearum; Fusarium verticillioides; canopy; corn; crop residues; data collection; diurnal variation; drying; environmental factors; fungi; heading; inoculum; models; plant diseases and disorders; plant pathogens; prediction; rain; relative humidity; soil; vapor pressure; water content; wheat; France; Italy
- Abstract:
- ... Maize residues on the soil surface are a major inoculum source of several fungal pathogens of maize. Because the moisture content of crop residues can greatly affect fungal survival and inoculum production, we studied the effects of rainfall and relative humidity (RH) on the moisture content in maize stalk residues on bare soil and on soil under a wheat crop at the heading stage (i.e., when the ca ...
- DOI:
- 10.1016/j.agrformet.2015.04.001
- https://doi.org/10.1016/j.agrformet.2015.04.001
- Author:
- Haijun Peng; Qian Guo; Hanwei Ding; Bing Hong; Yongxuan Zhu; Yetang Hong; Cheng Cai; Yu Wang; Linggui Yuan
- Source:
- Agricultural and forest meteorology 2019 v.276-277 pp. 107616
- ISSN:
- 0168-1923
- Subject:
- air temperature; anthropogenic activities; climate change; diurnal variation; ecosystems; eddy covariance; environmental factors; freezing; friction velocity; greenhouse gas emissions; growing season; methane; peatlands; seasonal variation; soil temperature; synergism; thawing; time series analysis; tropics; vapor pressure deficit; water table; wavelet; China
- Abstract:
- ... Most previous studies on methane (CH4) emissions from peatlands have focused on the boreal, subarctic, and tropical regions. Little is known about CH4 emissions from the alpine peatlands that are widely distributed in the eastern Qinghai-Tibetan Plateau (QTP), which are sensitive to climate change and human disturbance. To assess the magnitudes of daily and seasonal variations in CH4 flux in this ...
- DOI:
- 10.1016/j.agrformet.2019.107616
- https://doi.org/10.1016/j.agrformet.2019.107616
- Author:
- Xiaosong Zhao; Yuanbo Liu
- Source:
- Agricultural and forest meteorology 2017 v.244-245 pp. 98-110
- ISSN:
- 0168-1923
- Subject:
- climate; diurnal variation; eddy covariance; energy transfer; environmental factors; freshwater lakes; heat; phase transition; surface water; temperature; water vapor; wind speed; China
- Abstract:
- ... Energy exchanges between the water surface and the atmosphere over lakes play an important role in regulating regional climate. In shallow lakes, the lake bottom may shift from being inundated to being exposed, which substantially alters the energy exchange pattern. We measured the turbulent fluxes of sensible (H) and latent (LE) heat over Poyang Lake, the largest freshwater lake in China, using t ...
- DOI:
- 10.1016/j.agrformet.2017.05.024
- https://doi.org/10.1016/j.agrformet.2017.05.024
- Author:
- Zheng-Hong Tan; Jun-Fu Zhao; Guan-Ze Wang; Meng-Ping Chen; Lian-Yan Yang; Chun-Sheng He; Natalia Restrepo-Coupe; Shu-Shi Peng; Xue-Yan Liu; Humberto R. da Rocha; Yoshiko Kosugi; Takashi Hirano; Scott R. Saleska; Michael L. Goulden; Jiye Zeng; Fang-Jun Ding; Fu Gao; Liang Song
- Source:
- Agricultural and forest meteorology 2019 v.275 pp. 317-328
- ISSN:
- 0168-1923
- Subject:
- aerodynamics; diurnal variation; dry season; eddy covariance; environmental factors; evaporation; evapotranspiration; models; momentum; seasonal variation; transpiration; tropical forests; turbulent flow; water vapor
- Abstract:
- ... Tropical forests are responsible for the evaporation and transpiration of large quantities of water into the atmosphere annually. Surface conductance (gs) is a poorly understood phenomenon that plays a central role in regulating this evapotranspiration. We studied the calculations, variations, and environmental factors controlling gs based on eddy flux measurements from 10 tropical forest sites th ...
- DOI:
- 10.1016/j.agrformet.2019.06.006
- https://doi.org/10.1016/j.agrformet.2019.06.006
- Author:
- Savage, Kathleen; Davidson, Eric A.; Richardson, Andrew D.; Hollinger, David Y.
- Source:
- Agricultural and forest meteorology 2009 v.149 no.11 pp. 2012-2021
- ISSN:
- 0168-1923
- Subject:
- boreal forests; soil temperature; temperate forests; gas exchange; depth; seasonal variation; soil respiration; heterotrophs; gas emissions; measurement; carbon dioxide; phenology; weather; photosynthesis; autotrophs; soil-atmosphere interactions; simulation models; soil water content; equations; air temperature; accuracy; organic horizons; environmental factors; diurnal variation; Maine; Massachusetts
- Abstract:
- ... Soil respiration (R s) is a combination of autotrophic and heterotrophic respiration, but it is often modeled as a single efflux process, influenced by environmental variables similarly across all time scales. Continued progress in understanding sources of variation in soil CO₂ efflux will require development of R s models that incorporate environmental influences at multiple time scales. Coherenc ...
- Handle:
- 10113/36844
- DOI:
- 10.1016/j.agrformet.2009.07.008
- https://doi.org/10.1016/j.agrformet.2009.07.008
- Author:
- Guo, Haiqiang; Noormets, Asko; Zhao, Bin; Chen, Jiquan; Sun, Ge; Gu, Yongjian; Li, Bo; Chen, Jiakuan
- Source:
- Agricultural and forest meteorology 2009 v.149 no.11 pp. 1820-1828
- ISSN:
- 0168-1923
- Subject:
- primary productivity; soil temperature; organic matter; gas exchange; carbon sequestration; seasonal variation; soil respiration; carbon; spectral analysis; gas emissions; altitude; carbon dioxide; coasts; ecosystems; estuaries; surface water level; salt marshes; flooded conditions; cell respiration; net ecosystem exchange; seawater; diurnal variation; China
- Abstract:
- ... One year of continuous data from two eddy-flux towers established along an elevation gradient in coastal Shanghai was analyzed to evaluate the tidal effect on carbon flux (F c) over an estuarine wetland. The measured wavelet spectra and cospectra of F c and other environmental factors demonstrated that the dynamics of F c at both sites exhibited a tidal-driven pattern with obvious characteristics ...
- Handle:
- 10113/36846
- DOI:
- 10.1016/j.agrformet.2009.06.010
- https://doi.org/10.1016/j.agrformet.2009.06.010
- Author:
- Dierick, Diego; Hölscher, Dirk; Schwendenmann, Luitgard
- Source:
- Agricultural and forest meteorology 2010 v.150 no.12 pp. 1568-1578
- ISSN:
- 0168-1923
- Subject:
- interspecific variation; plant available water; forest trees; stems; soil water content; water use efficiency; tropical forests; Bambusa; sap flow; transpiration; environmental factors; diurnal variation; spatial variation; energy balance; heat transfer; Philippines
- Abstract:
- ... We studied water use in a common bamboo species (Bambusa blumeana J.A. and J.H. Schultes) in the Philippines with the aim to (1) estimate bamboo water use and its dependence on environmental factors, (2) evaluate internal water storage and water dynamics and (3) compare water use characteristics of this bamboo species with those of co-occurring tree species. Two thermal sap flow methods were appli ...
- DOI:
- 10.1016/j.agrformet.2010.08.006
- https://doi.org/10.1016/j.agrformet.2010.08.006