1986
DOI: 10.1007/bf02189371
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Estimating mean windflow in hilly terrain from tamarack (Larix lancina (Du Roi) K. Koch) deformation

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Cited by 16 publications
(10 citation statements)
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“…If wind direction is parallel to the ridge, wind can then pass around the obstacle so that wind speed and turbulence are greater at the bottom of the slope where the obstacle is larger (Hutte 1968). When wind blows perpendicular to the crest, wind speed will increase uphill, being maximum at the summit, whereas if wind direction is oblique, wind will be blowing around and over the upwind shoulder so that wind often becomes turbulent and changes direction at mid-slope (Robertson 1986). Just behind a hill top, windthrow hazard can be quite high since, even though wind speed abates, turbulence continues to increase (Hutte 1968;Moore 1977).…”
Section: Topographymentioning
confidence: 99%
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“…If wind direction is parallel to the ridge, wind can then pass around the obstacle so that wind speed and turbulence are greater at the bottom of the slope where the obstacle is larger (Hutte 1968). When wind blows perpendicular to the crest, wind speed will increase uphill, being maximum at the summit, whereas if wind direction is oblique, wind will be blowing around and over the upwind shoulder so that wind often becomes turbulent and changes direction at mid-slope (Robertson 1986). Just behind a hill top, windthrow hazard can be quite high since, even though wind speed abates, turbulence continues to increase (Hutte 1968;Moore 1977).…”
Section: Topographymentioning
confidence: 99%
“…Robertson (1991), working with larch in Newfoundland, was able to relate the presence of compression wood and wind direction. Stem characteristics could then be used on level ground but the formation of compression wood induced by slope would prevent their use on dissected topography (Robertson 1986). Robertson (1986Robertson ( ,1987 has also demonstrated a relationship between crown deformations and average wind speed and direction.…”
Section: Local Observationsmentioning
confidence: 99%
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“…Our data suggest patterns of distortion in alpine and subantarctic plants, regardless of growth form, do not simply relate to the most frequent strong winds, as is generally the case in other environments (Noguchi, 1979;Hadley and Smith, 1983;Robertson, 1986;Wooldridge et al, 1996), with some exceptions, such as seasonality of winds (Holtmeier, 2009).…”
Section: Correspondence Of Distortion To Wind Regimesmentioning
confidence: 54%
“…The tree is photographed perpendicular to the maximum deformation, and analyzed using a grid overlay on the photo to measure deformation angles. Tree ring analysis can also be used to estimate windspeed (Robertson 1986). Tree sections are measured for ring width on the lee and windward side of the trunk, with ring width wider on the lee or branched side.…”
Section: Experimental Methodsmentioning
confidence: 99%