cold climates: focus on boreal lands
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Chapter 20. Cold climates: Focus on Boreal lands. Introduction to the Boreal Climate. Two types of cold climate are : Tundra climate – coldest (furthest from equator) Boreal climate. ‘Boreal’ means ‘northern’ Tundra climate is in Arctic Circle Boreal climate is between 50-66.5 N. - PowerPoint PPT PresentationTRANSCRIPT
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COLD CLIMATES: FOCUS ON BOREAL LANDS
Chapter 20
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Introduction to the Boreal ClimateTwo types of cold climate are:• Tundra climate –
coldest (furthest from equator)
• Boreal climate‘Boreal’ means ‘northern’
Tundra climate is in Arctic CircleBoreal climate is between 50-66.5 N.
January: very cold, temperatures down -29C in places
Short, warm summers up to 16C
Less than 400mm of rain per year
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Spruce TreesFir TreesPine trees
There are many coniferous forests of:• Spruce trees• Pine trees• Fir trees
Natural Vegetation
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• Most conifers are evergreen
• Slender shape offers little resistance to the wind which prevents damages from storms
• Thick bark keeps moisture in and stops wind and cold from getting into the trees.
• Thin needles don’t wither in the wind.
• The branches slope towards the ground to allow the snow to fall off.
• Shallow roots develop in the thin layers of soil.
• Sustainable logging is extremely important.
• Rule: Cut one, plant two trees (as said by Swedish Government)
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Taiga 1/3 of the worlds trees
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Chapter SummaryMain details from this chapter include:
Russia, USA, Canada, Finland, Norway and Sweden are the Boreal lands of the world.
They are located in the northern hemisphere between 50-=66.5 (north of the equator).
There are two types:TundraBoreal
The climate type : Cool temperate Climate
Cold winters: -29C (high latitudes)Summers: 16C in JulyPrecipitation: 400mm per year
Natural vegetation: coniferous trees (spruce, fir, pine).Vegetation adapts by: Shape, bark, needles, shallow roots and sloping branches‘Taiga’ = forests of the Boreal area 1/3 of the worlds trees).