ORNL FACE Leaf Area Index (LAI)

Norby, R.J.; Tharp, M.L.

doi:10.15485/1463810

Title: ORNL FACE Leaf Area Index (LAI)

Dataset
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Abstract

Leaf area data are available for 1999-2006. There is a daily file for each year which contains the leaf area index values (m2/m2).Leaf area index (LAI, total one-sided leaf area above a unit of ground area)was calculated for each plot for every day of the growing season.Leaf area production in the spring was calculated from the fractionaltransmittance of PAR (T), which was calculated from daily total PAR aboveand below the canopy. A curve was fit to ln(T)/-k data, wherethe extinction coefficient k was set such that maximum leaf areaproduction at budset (early to mid July) was equal to that determinedfrom litter basket collections. A canopy-averaged value of leaf mass perunit leaf area was used to convert abscised leaf mass in litter baskets togreen leaf area. A curve was fit through litter basket data to generatecumulative daily leaf area loss, which was subtracted from the leaf areaproduction curve to generate daily LAI.The data were generated for the elevated CO2 rings 1 and 2, and the ambient CO2 rings 3, 4, and 5. The following reference describes these data in more detail: Norby RJ, Sholtis JD, Gunderson CA,Jawdy SS. 2003. Leaf dynamics of a deciduous forest canopy: noresponse to elevated CO2. Oecologia,more » DOI 10.1007/s00442-003-1296-2« less

Authors:

Norby, R.J.; Tharp, M.L.

Environmental Sciences Division, Oak Ridge National Laboratory

Publication Date:: Tue Jul 10 00:00:00 EDT 2007

Other Number(s):: cdiac:ORNL FACE LAI

Research Org.:: Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)

Subject:: 54 ENVIRONMENTAL SCIENCES

Keywords:: carbon dioxide; CO2 enrichment; FACE; LAI; Leaf Area Index; ORNL FACE; sweetgum; Liquidambar Styraciflua; vegetation response; YEAR; DOY; RING; LAI (m2/m2)

Geolocation:: 35.9,-84.33|35.9,-84.33|35.9,-84.33|35.9,-84.33|35.9,-84.33

OSTI Identifier:: 1463810

DOI:: https://doi.org/10.15485/1463810

Project Location:

Citation Formats


                    Norby, R.J., and Tharp, M.L. ORNL FACE Leaf Area Index (LAI).  United States: N. p., 2007. 
        Web.  doi:10.15485/1463810.

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                    Norby, R.J., & Tharp, M.L. ORNL FACE Leaf Area Index (LAI).  United States.  doi:https://doi.org/10.15485/1463810

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                    Norby, R.J., and Tharp, M.L. 2007.  
"ORNL FACE Leaf Area Index (LAI)".  United States.  doi:https://doi.org/10.15485/1463810.  https://www.osti.gov/servlets/purl/1463810. Pub date:Tue Jul 10 00:00:00 EDT 2007

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@article{osti_1463810,

  title        = {ORNL FACE Leaf Area Index (LAI)},

  author       = {Norby, R.J. and Tharp, M.L.},

  abstractNote = {Leaf area data are available for 1999-2006. There is a daily file for each year which contains the leaf area index values (m2/m2).Leaf area index (LAI, total one-sided leaf area above a unit of ground area)was calculated for each plot for every day of the growing season.Leaf area production in the spring was calculated from the fractionaltransmittance of PAR (T), which was calculated from daily total PAR aboveand below the canopy. A curve was fit to ln(T)/-k data, wherethe extinction coefficient k was set such that maximum leaf areaproduction at budset (early to mid July) was equal to that determinedfrom litter basket collections. A canopy-averaged value of leaf mass perunit leaf area was used to convert abscised leaf mass in litter baskets togreen leaf area. A curve was fit through litter basket data to generatecumulative daily leaf area loss, which was subtracted from the leaf areaproduction curve to generate daily LAI.The data were generated for the elevated CO2 rings 1 and 2, and the ambient CO2 rings 3, 4, and 5. The following reference describes these data in more detail: Norby RJ, Sholtis JD, Gunderson CA,Jawdy SS. 2003. Leaf dynamics of a deciduous forest canopy: noresponse to elevated CO2. Oecologia, DOI 10.1007/s00442-003-1296-2},

  doi          = {10.15485/1463810},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jul 10 00:00:00 EDT 2007},

  month        = {Tue Jul 10 00:00:00 EDT 2007}

}

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DOI: https://doi.org/10.15485/1463810

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