Influence of gap size on wind damage variables in a forest

Panferov, O.; Sogachev, Andrey

doi:10.1016/j.agrformet.2008.06.012

Cited by 35 publications

(26 citation statements)

References 30 publications

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“…During the last decade several studies focused on estimation of clear-cutting and thinning effects on wind and turbulent exchange within atmospheric boundary and surface layers (e.g. [15][16][17][18][19]). In relation to forest microclimate such studies are very important because the turbulence regime is one of the main factors determining thermal and moisture status of ground surface and the atmospheric surface layer.…”

Section: Introductionmentioning

confidence: 99%

Radiation and Temperature Responses to a Small Clear-Cut in a Spruce Forest

Radler¹

2010

TOGEOGJ

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Effects of a small clear-cutting on solar radiation, soil and air temperature regimes were investigated by continuous field measurements in a spruce forest in Solling, Central Germany, during vegetation period of 2005. Five meteorological stations, installed in central part of a small clear-cut area (2.5 ha) and close to edges of a surrounding forest, allowed to quantify the spatial variability of meteorological parameters within the clear-cut and to describe the impacts of the forest on clear-cut microclimate. The differences of microclimatic conditions between the clear-cut and the surrounding forest were derived using an additional station installed inside the forest about 150 m from the clear-cut. Results showed that clear-cutting leads to significant changes of spatial and temporal patterns of solar radiation and soil temperature. Solar radiation at the clear-cut was very heterogeneously distributed and about 5-11 times higher than inside the forest. It reached maximum at northeastern part and minimum at southwestern part of the clear-cut. The daily maximal soil temperature at 10 cm depth was measured at northern parts of the clear-cut and it was by up to 6°C higher than in the forest. Daily minimal soil temperature at the clear-cut was about 1-3°C higher than in the forest, too. The main factors influencing the soil temperature patterns were seasonally changed incoming solar radiation, ground vegetation and its phenology, as well as soil moisture. The mean daily maximal air temperature measured at the clear-cut was by up to 2.5°C higher and the mean daily minimal temperature by up to 0.5°C lower than in the surrounded forest.

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Section: Introductionmentioning

confidence: 99%

Radiation and Temperature Responses to a Small Clear-Cut in a Spruce Forest

Radler¹

2010

TOGEOGJ

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“…The 4 x/ ht gap size in the simulation did not have any re-circulation (any negative horizontal velocity, or reverse flow, would have shown up as white) within the clearing, in fact no recirculating effects were output downwind of a stand, which agrees with simulations by Panferov and Sogachev (2008). At heights of 0.4 h x , the simulations by Panferov and Sogachev (2008) reported no reverse flow in gaps at 1.7 and 6.1 tree heights in length.…”

Section: Horizontal Wind Velocitysupporting

confidence: 80%

“…This is contradictory to other studies which do show similar peaks of TKE between one and two tree heights (eg. Frank and Ruck, 2008;Panferov and Sogachev, 2008;and Foudhil et al, 2005) and then report a noticeable decrease above two tree heights (Frank and Ruck, 2008;and Foudhil et al, 2005), in both their simulations and observations.…”

Section: Comparison Of Flow Traits With Other Studiesmentioning

confidence: 99%

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Numerical modelling of airflow within and above forests and forest clearings using computational fluid dynamics.

Phaneuf¹

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“…Model equations and details about numerical schemes and boundary conditions can be found in Sogachev et al (2002). It should be noted however, that the model is capable to describes separately the mean and gust loads on trees which allows more exact evaluation of possible wind damage cause and of high risk areas within the stand (Panferov and Sogachev, 2008). The estimation of critical loads leading to overturning or breakage of trees is described in details in Panferov et al (2009Panferov et al ( , 2010.…”

Section: Wind Loadmentioning

confidence: 99%