Summary:

The BOREAS RSS-07 team collected various data sets to develop and validate an algorithm to allow the retrieval of the spatial distribution of LAI from remotely sensed images. Ground measurements of LAI and FPAR absorbed by the plant canopy were made using the LAI-2000 and TRAC optical instruments during focused periods from 09-AUG-1993 to 19-SEP-1994. The measurements were intensive at the NSA and SSA tower sites, but were made just once or twice at auxiliary sites.

A guide document which includes more information about this data set can be found at https://daac.ornl.gov/daacdata/boreas/RSS/r07elaid/comp/RSS07_Ground_LAI_FPAR.txt .

ORNL DAAC maintains information on the entire BOREAS Project.

Data Citation

Cite this data set as follows:

Chen, J. M., and J. Cihlar . 1998. BOREAS RSS-07 LAI, Gap Fraction, and fPAR Data. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/ORNLDAAC/294.

References:

Chen, J.M. and T.A. Black. 1992a. Defining leaf area index for non-flat leaves. Plant, Cell and Environment. 15:121-129.

Chen, J.M. and T.A. Black. 1992b. Foliage area and architecture of plant canopies from sunfleck size distributions. Agric. For. Meteorol. 60:249-266.

Chen, J.M. and J. Cihlar. 1995a. Plant canopy gap size analysis theory for improving optical measurements of leaf area index. Applied Optics. 34:6211-6222.

Chen, J.M. and J. Cihlar. 1995b. Quantifying the effect of canopy architecture on optical measurements of leaf area index using two gap size analysis methods. IEEE Trans. Geosci. Remote Sens. 33:777-787.

Chen, J.M. and J. Cihlar. 1996. Retrieving leaf area index for boreal conifer forests using Landsat TM images. Remote Sensing of Environment. 55:153-162.

Chen, J.M. 1996a. Optically-based methods for measuring seasonal variation in leaf area index of boreal conifer forests. Agricultural and Forest Meteorology 80:135-163.

Chen, J.M. 1996b. Canopy architecture and remote sensing of the fraction of photosynthetically active radiation in boreal conifer stands. IEEE Transactions on Geoscience and Remote Sensing. 34:1353-1368.

Chen, J.M. 1996c. Evaluation of vegetation indices and a simple ratio for boreal applications. Canadian Journal of Remote Sensing 22: 229-242.

Chen, J.M., P. Blanken, T.A. Black., M. Guilbeault, and S. Chen. 1997a. Radiation regime and canopy architecture of a boreal aspen forest. Agricultural and Forest Meteorology 86:107-125.

Chen, J. M., P. M. Rich, S. T. Gower, J. M. Norman, S. Plummer, 1997b, "Leaf Area Index of Boreal Forests: Theory, techniques, and measurements," Journal of Geophysical Research, BOREAS Special Issue, 102, 29429-29443.

Deblonde, G., M. Penner, and A. Royer. 1994. Measuring leaf area index with the LI-COR LAI-2000 in pine stands. Ecology 75:1507-1511.

Fassnacht, K.S., S.T. Gower, J.M. Norman, and R.E. McMurtie. 1994. A comparison of optical and direct methods for estimating foliage surface area index in forests. Agric. For. Meteorol. 71:183-207.

Gower, S.T. and J.M. Norman. 1991. Rapid estimation of leaf area index for forests using LI-COR LAI-2000. Ecology. 72:1896-1900. v Lang, A.R.G.. 1991. Application of some of Cauthy's theorems to estimation of surface areas of leaves, needles and branches of plants, and light transmittance. Agric. For. Meteorol. 55:191-121.

Sellers, P. and F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1994-3.0, NASA BOREAS Report (EXPLAN 94).

Sellers, P. and F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1996-2.0, NASA BOREAS Report (EXPLAN 96).

Sellers, P. and F. Hall. 1997. BOREAS Overview Paper. JGR Special Issue, 102.

Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere Study: 1994 Operations. NASA BOREAS Report (OPS DOC 94).

Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere Study: 1996 Operations. NASA BOREAS Report (OPS DOC 96).

Sellers, P., F. Hall, H. Margolis, B. Kelly, D. Baldocchi, G. den Hartog, J. Cihlar, M.G. Ryan, B. Goodison, P. Crill, K.J. Ranson, D. Lettenmaier, and D.E. Wickland. 1995. The boreal ecosystem-atmosphere study (BOREAS): an overview and early results from the 1994 field year. Bulletin of the American Meteorological Society. 76(9):1549-1577.

Welles, J.M. and J.M. Norman. 1991. Instrument for indirect measurement of canopy architecture. Agronomy Journal 83:818-825.

Data Format:

For information on Parameter/Variable Names, Variable Description/Definition, Units of Measurement, and Data File Format see this companion file https://daac.ornl.gov/daacdata/boreas/RSS/r07elaid/comp/r07elaid.def

Document Information:

12-Oct-1998 (data citation revised on 26-Sep-2002)

Document Review Date:

12-Oct-1998

Document Curator:

uso@daac.ornl.gov

Document URL:

https://daac.ornl.gov