Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079306 |
Temporal Dynamics of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks | |
Chu, Housen1; 39;Halloran, Thomas L.2 | |
2018-09-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:17页码:9275-9287 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Peoples R China |
英文摘要 | Aerodynamic canopy height (h(a)) is the effective height of vegetation canopy for its influence on atmospheric fluxes and is a key parameter of surface-atmosphere coupling. However, methods to estimate h(a) from data are limited. This synthesis evaluates the applicability and robustness of the calculation of h(a) from eddy covariance momentum-flux data. At 69 forest sites, annual h(a) robustly predicted site-to-site and year-to-year differences in canopy heights (R-2=0.88, 111site-years). At 23 cropland/grassland sites, weekly h(a) successfully captured the dynamics of vegetation canopies over growing seasons (R-2>0.70 in 74site-years). Our results demonstrate the potential of flux-derived h(a) determination for tracking the seasonal, interannual, and/or decadal dynamics of vegetation canopies including growth, harvest, land use change, and disturbance. The large-scale and time-varying h(a) derived from flux networks worldwide provides a new benchmark for regional and global Earth system models and satellite remote sensing of canopy structure. Plain Language Summary Vegetation canopy height is a key descriptor of the Earth surface and is in use by many modeling and conservation applications. However, large-scale and time-varying data of canopy heights are often unavailable. This synthesis evaluates the applicability and robustness of the calculation of canopy heights from the momentum flux data measured at eddy covariance flux tower sites (i.e., meteorological observation towers with high frequency measurements of wind speed and surface fluxes). We show that the aerodynamic estimation of annual canopy heights robustly predicts the site-to-site and year-to-year differences in canopy heights across a wide variety of forests. The weekly aerodynamic canopy heights successfully capture the dynamics of vegetation canopies over growing seasons at cropland and grassland sites. Our results demonstrate the potential of aerodynamic canopy heights for tracking the seasonal, interannual, and/or decadal dynamics of vegetation canopies including growth, harvest, land use change, and disturbance. Given the amount of data collected and the diversity of vegetation covered by the global networks of eddy covariance flux tower sites, the flux-derived canopy height has great potential for providing a new benchmark for regional and global Earth system models and satellite remote sensing of canopy structure. |
英文关键词 | momentum flux AmeriFlux eddy covariance canopy height phenology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445727500064 |
WOS关键词 | ZERO-PLANE DISPLACEMENT ; CARBON-DIOXIDE FLUXES ; NET ECOSYSTEM PRODUCTION ; MIXED HARDWOOD FOREST ; WATER-USE EFFICIENCY ; BLACK SPRUCE FOREST ; LEAF-AREA INDEX ; ROUGHNESS LENGTH ; INTERANNUAL VARIABILITY ; DECIDUOUS FOREST |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28027 |
专题 | 气候变化 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Earth & Environm Sci Area, Berkeley, CA USA; 2.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 3.Calif State Univ Sacramento, Dept Civil Engn, Sacramento, CA 95819 USA; 4.Michigan State Univ, Great Lakes Bioenergy Res Ctr, E Lansing, MI 48824 USA; 5.Univ Wisconsin Madison, Dept Atmospher & Ocean Sci, Madison, WI USA; 6.Ohio State Univ, Dept Civil Environm & Geodet Engn, Columbus, OH 43210 USA; 7.McMaster Univ, Sch Geog & Earth Sci, Hamilton, ON, Canada; 8.Univ Minnesota, Dept Soil Water & Climate, Minneapolis, MN USA; 9.Univ Colorado, Dept Geog, Boulder, CO 80309 USA; 10.Clemson Univ, Forestry & Environm Conservat Dept, Clemson, SC USA; 11.Virginia Tech, Dept Forest Resources & Environm Conservat, Blacksburg, VA USA; 12.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN USA; 13.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China; 14.US Forest Serv, USDA, Rocky Mt Res Stn, Ft Collins, CO USA; 15.USDA ARS, Natl Lab Agr & Environm, Ames, IA USA; 16.Univ Guelph, Sch Environm Sci, Guelph, ON, Canada; 17.Univ British Columbia, Fac Land & Food Syst, Vancouver, BC, Canada; 18.Virginia Commonwealth Univ, Dept Biol, Med Coll Virginia Campus, Richmond, VA 23284 USA; 19.Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR 97331 USA; 20.Yale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511 USA; 21.Michigan State Univ, Dept Geog Environm & Spatial Sci, E Lansing, MI 48824 USA; 22.US Forest Serv, USDA, Northern Res Stn, New Lisbon, NJ USA; 23.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA; 24.USDA ARS, Soil & Water Res Unit, St Paul, MN USA |
推荐引用方式 GB/T 7714 | Chu, Housen,39;Halloran, Thomas L.. Temporal Dynamics of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(17):9275-9287. |
APA | Chu, Housen,&39;Halloran, Thomas L..(2018).Temporal Dynamics of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks.GEOPHYSICAL RESEARCH LETTERS,45(17),9275-9287. |
MLA | Chu, Housen,et al."Temporal Dynamics of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks".GEOPHYSICAL RESEARCH LETTERS 45.17(2018):9275-9287. |
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