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What are the Fundemental Drivers of climate (3)?
- 1. solar radiation
- 2. atmospheric gases and particulates
- 3. adiabatic processes
Why do deserts exist?
- Air near equator is heated and rises until it hits the stratosphere where
- further heating ceases.
Air below pushes the stratospheric air outward, north and south.
Once air hits the stratosphere it continues cooling + flows north and south.
cools enough to begin to sink.
Asit sinks, warms and picks up water vapor, drying the environment.
This occurs around 30o and 60 latitude, north and south.(deserts)
what does vegetation do for local climate?
moderates temp fluctuations
specific habitats. climates on very small scale
ex: burrows, litter, underbark, north facing side of tree
w/in 10 deg n and s of equator
little temp variation
+100mm of rainfall/yr
nutrient poor soils
high diversity of species/biomes
Tropical Dry Forest
btwn 10 and 25 deg n and s of eq8r
6-7 months dry, 5-6 mo. wet season
more nutrients in soil and more wind pollination than rainforests
btwn 10 and 20 deg n and s of equator
dry and wet season. wet = intense lightning and fires to kill young trees and let grasses grow
low permeability of soil = pools of water for mgratory animals
around 30 deg n and s of equ8r
20% of land surface on earth
dry as fuck least precipitation
24% of earths vegetation, n america, europe
deep fertile soils
used to be hella grazing heards
between 30 and 55 deg n and s of eq8r
moder8 temp ample rain
best temporate biodiversity
fertile and rich soil
btwn 50 and 65 deg latitude
long winter short summer
summer temp exceed 30 deg winter lees than negative 70 celsius
low soil fetility ,permafrost
- dry and cold
- greater latitude than boreal forests
- soggy summer ponds and streams
- permafrost common
- Increasing elevation is analogous to
- increasing latitude
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