Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Towards an improved LAI collection protocol via simulated field-based PAR sensing

Journal Article · · Sensors
DOI: https://doi.org/10.3390/s16071092 · OSTI ID:1263884
 [1];  [2];  [1];  [1];  [1]
  1. Rochester Institute of Technology, Rochester, NY (United States)
  2. Rochester Institute of Technology, Rochester, NY (United States); Univ. College London, London (United Kingdom)
+ Show Author Affiliations

In support of NASA’s next-generation spectrometer—the Hyperspectral Infrared Imager (HyspIRI)—we are working towards assessing sub-pixel vegetation structure from imaging spectroscopy data. Of particular interest is Leaf Area Index (LAI), which is an informative, yet notoriously challenging parameter to efficiently measure in situ. While photosynthetically-active radiation (PAR) sensors have been validated for measuring crop LAI, there is limited literature on the efficacy of PAR-based LAI measurement in the forest environment. This study (i) validates PAR-based LAI measurement in forest environments, and (ii) proposes a suitable collection protocol, which balances efficiency with measurement variation, e.g., due to sun flecks and various-sized canopy gaps. A synthetic PAR sensor model was developed in the Digital Imaging and Remote Sensing Image Generation (DIRSIG) model and used to validate LAI measurement based on first-principles and explicitly-known leaf geometry. Simulated collection parameters were adjusted to empirically identify optimal collection protocols. Furthermore, these collection protocols were then validated in the field by correlating PAR-based LAI measurement to the normalized difference vegetation index (NDVI) extracted from the “classic” Airborne Visible Infrared Imaging Spectrometer (AVIRIS-C) data (R2 was 0.61). The results indicate that our proposed collecting protocol is suitable for measuring the LAI of sparse forest (LAI < 3–5 ( m2/m2)).

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1263884
Journal Information:
Sensors, Vol. 16, Issue 7; ISSN 1424-8220
Publisher:
MDPI AGCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

NEON: the first continental-scale ecological observatory with airborne remote sensing of vegetation canopy biochemistry and structure journal January 2010
Importance of leaf area index and forest type when estimating photosynthesis in boreal forests journal March 1993
Assessing the impact of sub-pixel vegetation structure on imaging spectroscopy via simulation conference May 2015
Ceptometer Deployment Method Affects Measurement of Fraction of Intercepted Photosynthetically Active Radiation journal January 2010
Solar position algorithm for solar radiation applications journal January 2004
A comparison of spatial sampling techniques enabling first principles modeling of a synthetic aperture RADAR imaging platform conference April 2010
Mapping Regional Forest Evapotranspiration and Photosynthesis by Coupling Satellite Data with Ecosystem Simulation journal August 1989
Comparing Opticaland Direct Methods for Leafarea Index Determination in a Maize crop journal March 2010
Experimental Sentinel-2 LAI estimation using parametric, non-parametric and physical retrieval methods – A comparison journal October 2015
Review of methods for in situ leaf area index determination journal January 2004
Modelling the seasonal CO2 uptake by land vegetation using the global vegetation index journal April 1991
MODTRAN4 radiative transfer modeling for atmospheric correction
  • Berk, Alexander; Anderson, Gail P.; Bernstein, Lawrence S.
  • SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.366388
conference October 1999
On the relationship of NDVI with leaf area index in a deciduous forest site journal January 2005
Comparison of Three Leaf Area Index Meters in a Corn Canopy journal July 2000
Relationships between Leaf Area Index and Landsat TM Spectral Vegetation Indices across Three Temperate Zone Sites journal October 1999
Incorporation of a time-dependent thermodynamic model and a radiation propagation model into IR 3D synthetic image generation journal January 1992
Review of methods for in situ leaf area index (LAI) determination journal January 2004
Estimating Cotton leaf area Index Nondestructively with a Light Sensor journal July 2005
Defining leaf area index for non-flat leaves journal May 1992
Comparative Physiological Studies on the Growth of Field Crops.: iii. the Effect of Infection with beet Yellows and beet Mosaic Viruses on the Growth and Yield of the Sugar-Beet root crop journal March 1953
Direct measurements of canopy structure journal January 1990
Extinction coefficients for radiation in plant canopies calculated using an ellipsoidal inclination angle distribution journal April 1986
Comparison and sensitivity analysis of instruments and radiometric methods for LAI estimation: assessments from a boreal forest site journal April 2004
On the Factor Light in Plant Communities and its Importance for Matter Production journal December 2004
An Advanced Synthetic Image Generation Model and its Application to Multi/Hyperspectral Algorithm Development journal June 1999
Error and uncertainty in modeling and simulation journal March 2002
Photosynthesis in Sitka Spruce (Picea sitchensis (Bong.) Carr.): V. Radiation Penetration Theory and a Test Case journal December 1975
Application of some of Cauchy's theorems to estimation of surface areas of leaves, needles and branches of plants, and light transmittance journal June 1991
Land-Atmosphere interactions for climate system Models: coupling biophysical, biogeochemical, and ecosystem dynamical processes journal January 1995
Leaf area index of boreal forests: Theory, techniques, and measurements journal December 1997
A data fusion algorithm based on the Kalman filter to estimate leaf area index evolution in durum wheat by using field measurements and MODIS surface reflectance data journal March 2016
Modelling the seasonal CO 2 uptake by land vegetation using the global vegetation index journal January 1991
Importance of leaf area index and forest type when estimating photosynthesis in boreal forests journal March 1993
Extinction coefficients for radiation in plant canopies calculated using an ellipsoidal inclination angle distribution journal April 1986
Review of methods for in situ leaf area index (LAI) determination journal January 2004
Review of methods for in situ leaf area index determination journal January 2004
Experimental Sentinel-2 LAI estimation using parametric, non-parametric and physical retrieval methods – A comparison journal October 2015
On the relationship of NDVI with leaf area index in a deciduous forest site journal January 2005
Solar position algorithm for solar radiation applications journal January 2004
Modelling the seasonal CO2 uptake by land vegetation using the global vegetation index journal April 1991
Direct measurements of canopy structure journal January 1990
An Advanced Synthetic Image Generation Model and its Application to Multi/Hyperspectral Algorithm Development journal June 1999
On the Factor Light in Plant Communities and its Importance for Matter Production journal December 2004
A comparison of spatial sampling techniques enabling first principles modeling of a synthetic aperture RADAR imaging platform conference April 2010
Estimating Cotton leaf area Index Nondestructively with a Light Sensor journal July 2005
Comparison of Three Leaf Area Index Meters in a Corn Canopy journal July 2000
Mapping Regional Forest Evapotranspiration and Photosynthesis by Coupling Satellite Data with Ecosystem Simulation journal August 1989
Comparing Opticaland Direct Methods for Leafarea Index Determination in a Maize crop journal March 2010

Cited By (2)

A Simulation Study Using Terrestrial LiDAR Point Cloud Data to Quantify Spectral Variability of a Broad-Leaved Forest Canopy journal October 2018
A Simulation Study Using Terrestrial LiDAR Point Cloud Data to Quantify Spectral Variability of a Broad-Leaved Forest Canopy journal October 2018

Similar Records

Related Subjects

47 OTHER INSTRUMENTATION
HyspIRI
AVIRIS
DIRSIG
leaf area index
photosynthetically active radiation