Canopy chlorophyll content (Chl) closely relates to plant photosynthetic capacity, nitrogen status and productivity. The goal of this study is to develop remote sensing techniques for accurate estimation of canopy Chl during the entire growing season without re-parameterization of algorithms for two contrasting crop species, maize and soybean. These two crops represent different biochemical mec...

As the most basic knowledge of remote sensing, spectral radiances that are reflected from the surface and received by the sensor are under the influence of various physical factors. One of the most important factors is the reflectance properties of the surface such as spatial, spectral and biophysical conditions. On the other hand, Tropical Rainforest is known as the most important for us to su...

Estimates of forest canopy cover are widely used in forest research and management, yet methods used to quantify canopy cover and the estimates they provide vary greatly. Four commonly used ground-based techniques for estimating overstory cover – line-intercept, spherical densiometer, moosehorn, and hemispherical photography – and cover estimates generated from crown radii parameters of the wes...

The hydrological recovery of watersheds from disturbances such as ®re and harvest can change the magnitude and distribution of ̄ow paths as the canopy regenerates. The spatial distribution of net water input to the soil±topography system is mediated by vegetation patterns through the processes of interception, evapotranspiration and snowmelt. We have previously described RHESSys, a distributed ...

Title of Document: ENHANCEMENT OF A CANOPY REFLECTANCE MODEL FOR UNDERSTANDING THE SPECULAR AND SPECTRAL EFFECTS OF AN AQUATIC BACKGROUND IN AN INUNDATED TIDAL MARSH Kevin Ross Turpie, Ph.D., 2012 Directed By: Professor Michael Kearney, Department of Geographical Sciences The presence of water produces unique specular and spectral characteristics in an inundated tidal marsh canopy. The aquatic ...

Vegetation controls important ecosystem processes responsible for energy and mass exchanges within the terrestrial biosphere. A comprehensive characterization of the vegetation canopy is thus required to monitor the heterogeneous and dynamic terrestrial biosphere. Although Earth Observation provides detailed measurements of the Earth surface, it has been a challenge to produce reliable data set...

Efforts inEurope to convertNorway spruce (Piceaabies) plantations tobroadleaf ormixedbroadleaf-conifer forests could be bolstered by an increased understanding of how artificial regeneration acclimates and functions under a range of Norway spruce stand conditions. We studied foliage characteristics and leaflevel photosynthesis on 7-year-old European beech (Fagus sylvatica) and pedunculate oak (...

Canopy defoliation is an important source of disturbance in forest ecosystems that has rarely been represented large-scale manipulation experiments. Scalable crown to canopy level experimental needed disentangle effects variable intensity, timing, and frequency on structure, function, mortality. We present a novel pressure washing-based method can be: implemented at the canopy-scale, throughout...

The composition and structure of vegetation are key attributes of ecosystems, affecting their current and future carbon, water, and energy fluxes. Information on these attributes has traditionally come from ground-based inventories of the plant canopy within small sample plots. Here we show how imaging spectrometry and waveform lidar can be used to provide spatially comprehensive estimates of f...

a r t i c l e i n f o Post-fire regrowth is an important component of carbon dynamics in Canada's boreal forests, yet observations of structural development following fire are lacking across this remote and expansive region. Here, we used Landsat time-series data (1985–2010) to detect high-severity fires in the Boreal Shield West ecozone of Canada, and assessed post-fire structure for N 600 bur...