Results 251 to 260 of about 17,761 (305)

Snow processes in a forest clearing and in a coniferous forest

Journal of Hydrology, 2002
An energy balance approach is applied to simulate snow accumulation and melt in a forest clearing and in a coniferous forest. The study site is located in southern Finland (60.1°N) where the winters are mild considering the high latitude. For forest simulations the snow model is coupled with a procedure, which accounts for the effects of the canopy on ...
H. Koivusalo, T. Kokkonen
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Heavy metals and litter decomposition in coniferous forests

2002
The dynamics of Mn, Zn, Fe, Cu, Pb, and Cd during litter decomposition was studied to understand how litter and soil metal concentrations influence the accumulation and/or the release of metals. Three types of leaf litters (green and brown leaves of Populus tremula L., green leaves of Betula pubescens Ehrh.) and four types of needle litters (green and ...
VIRZO DE SANTO A, FIERRO A. R, BERG B, RUTIGLIANO, Flora Angela, DE MARCO A.   +4 more
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Coniferous Forests of North America

1971
The boreal forest of North America has itself been differentiated from an earlier circumpolar mass and, hence, stands in close relationship to the coniferous forests of northern Europe and Siberia. It is even more closely related to the subalpine forests of the Rocky Mountains and the Sierran-Cascade system, which are to be regarded as more recent ...
J. E. Weaver, F. E. Clements
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Allelopathy and Competition in Coniferous Forests

1998
The paper deals with the growth inhibitions and interference potential of ericaceous shrubs in the coniferous forests, the possible biological and chemical mechanisms involved and suggests the control measures to combat the problems of growth inhibition. Competition, allelopathy, resource-toxin hypothesis and the involvement of ericoid mycorrhizae have
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Deposition of aerosol to coniferous forest

1995
Abstract The deposition velocity of ammonium(bi)sulphate (MMD 0.8 μm, σg 2) was derived from vertical concentration gradients using flux-profile relationships. The deposition velocity has a near-linear dependency on u* and an average value of 0.012–0.015 m s−1.
G.P. Wyers, A.C. Veltkamp, M. Geusebroek, A. Wayers, J.J. Möls   +4 more
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Macrofungi on soil in coniferous forests

1992
A survey is given about species composition of higher fungi in coniferous forest communities. Natural forest communities as weH as artificial forest stands are considered. Host range of mycorrhizal fungi, dependence of soil conditions (pH-value, nutrient content, moisture) and climate are discussed in detail. 1.
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Coniferous forests of the Pacific Northwest

1985
The coniferous forests described in this chapter are primarily those of Oregon, Washington, southern British Columbia, western Montana, and Idaho. This forest region is sharply bounded on the west by the Pacific Ocean, on the east by the crest of the Rocky Mountains, and ranges from central coastal California and southern Oregon to the southeast ...
James P. Lassoie, Thomas M. Hinckley, Charles C. Grier   +2 more
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Canopy Architecture and Turbulence Structure in a Coniferous Forest

Boundary-Layer Meteorology, 2003
Synchronous sonic anemometric measurements at five heightswithin a mixed coniferous forest were used to test two different parameterisations ofcanopy architecture in the application of a second-order turbulence closure model. Inthe computation of the leaf drag area, the aerodynamic sheltering was replaced with anarchitectural sheltering, assumed to be ...
Marcolla, Barbara, Pitacco, A., Cescatti, A.   +2 more
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Mechanisms of Deposition of Methylmercury and Mercury to Coniferous Forests

Water, Air, & Soil Pollution, 1995
Deposition of methylmercury (MeHg) and mercury (Hg) to a coniferous forest have been investigated using field measurements. Samples of open field (OF) wet deposition, throughfall (TF) and litterfall (LF) have been collected and analyzed for MeHg and Hg during the period November 1991 to April 1994. Average concentrations in TF were 22.8 and 0.38 ng L-1,
John Munthe, Hans Hultberg, �ke Iverfeldt   +2 more
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A radar backscatter model for discontinuous coniferous forests

IEEE Transactions on Geoscience and Remote Sensing, 1991
A radar backscattering model for low-to-medium-density woodland in which each tree is treated as an individual backscatterer is described. A forest stand viewed by radar is then an assemblage of scatterers standing on a background in a certain spatial pattern.
Guoqing Sun, David S. Simonett, Alan H. Strahler   +2 more
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