Results 211 to 220 of about 31,069 (262)
Some of the next articles are maybe not open access.
Canopy Closure Rate and Forest Structure
Ecology, 1997Natural disturbances produce openings in forest canopies. Gap opening and closure create a mosaic of regenerating phases in the forest, which are a source of environmental heterogeneity, contributing to the maintenance of community diversity. In this study we measured the rate of canopy closure using hemispherical photographs taken in the same points ...
Teresa Valverde, Jonathan Silvertown
openaire +1 more source
Application of bistatic MIMICS to forest canopies
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004A bistatic version of the Michigan Microwave Canopy Scattering model (MIMICS) is developed to simulate bistatic scattering from forest canopies. We present the applications of bistatic MIMICS in This work. By simulating the forest canopy scattering from multiple viewpoints, we can observe how a forest's structure, orientation and density affect the ...
Pan Liang, Leland E. Pierce
openaire +1 more source
Forest Inventory Using Forest Canopy Profiles
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005A helicopter-borne 8-channel ranging scatterometer HUTSCAT (Helsinki University of Technology Scatterometer) was used to measure forest canopy profiles (FCP). The FCP data were used in order to determinate the mean and dominant tree height and total volume per hectare.
J. Hyyppa, M. Hallikainen, H. Hyyppa
openaire +1 more source
Canopy Structure of the Forest
2003In order to assess herbivory rates (see Chap. 11) and also to calculate the effect of foliage removal on canopy carbon and water relations (see Chaps. 12 and 14), it is necessary to gain sufficient information on the amount of foliage present and its arrangement in space.
Rainer Wirth +4 more
openaire +1 more source
Polarimetric signatures of a forested canopy
IEEE Antennas and Propagation Society International Symposium 1992 Digest, 1992A microwave signature model based on the vector radiative transfer equation has been developed for a forested canopy. The model is designed to operate over a wide frequency band and to account for the size and orientation distributions of each forest component, the layering effect, and multiple scattering.
M.A. Karam, F. Amar, A.K. Fung
openaire +1 more source
The radiation budget of a forest canopy
Archiv für Meteorologie, Geophysik und Bioklimatologie Serie B, 1970Models were developed to separate the radiation-transfer processes of plant canopies from those of the underlying soil surface. The effect of the canopy was then examined by applying the model to springtime measurements of the fluxes of short- and longwave radiation entering and leaving a pine plantation.
Lloyd W. Gay, Kenneth R. Knoerr
openaire +1 more source
Science Intensive Technologies
The work is devoted to satellite microwave radiometric methods, which are of great scientific and practical interest for studies of tropical, temperate and boreal forests. Task: It is to assess the relevance and technological priorities of satellite microwave radiometry in relation to monitoring environmental and climatic processes occurring in forest
I.A. Sidorov +5 more
openaire +1 more source
The work is devoted to satellite microwave radiometric methods, which are of great scientific and practical interest for studies of tropical, temperate and boreal forests. Task: It is to assess the relevance and technological priorities of satellite microwave radiometry in relation to monitoring environmental and climatic processes occurring in forest
I.A. Sidorov +5 more
openaire +1 more source
1966
There Is A magnificent Polish epic poem, Pan Tadeusz by Adam Mickiewicz, in which a wild forest is the background to the story. Part of it is called ‘The Forest Community’ and the first seven lines of this run as follows: Those woods of Lithuania — who has dared explore Their depths abysmal, penetrate their midmost core?
openaire +1 more source
There Is A magnificent Polish epic poem, Pan Tadeusz by Adam Mickiewicz, in which a wild forest is the background to the story. Part of it is called ‘The Forest Community’ and the first seven lines of this run as follows: Those woods of Lithuania — who has dared explore Their depths abysmal, penetrate their midmost core?
openaire +1 more source
Forest canopy transformation of atmospheric deposition
Water, Air, and Soil Pollution, 1988Solute fluxes to the ground in open plots and under the forest canopy of different species were investigated in a number of long-term ecosystem studies in West Germany. From the canopy flux balance, rates of interception deposition and canopy/deposition interactions were assessed. Chemically, both open precipitation and throughfall are dilute solutions
openaire +1 more source
1966
The Rich leaf-eating populations of the forest canopy support an even richer assemblage of active parasites and predators, whose influence on the level of their numbers has attracted much discussion and some serious field study, but whose exact role is still by no means understood.
openaire +1 more source
The Rich leaf-eating populations of the forest canopy support an even richer assemblage of active parasites and predators, whose influence on the level of their numbers has attracted much discussion and some serious field study, but whose exact role is still by no means understood.
openaire +1 more source