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Lecture 1

GEOG 1F91 Lecture Notes - Lecture 1: Mount Pinatubo, Siberian Traps, Sensible Heat


Department
Geography
Course Code
GEOG 1F91
Professor
Jayson Childs
Lecture
1

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GEOG 1F91
Main indicators of climate change
INCREASING
-GHG concentrations
-global temp since 1880
land temperatures
temperatures in acrtic
precipitation change
area of drought increases
seal level
ocean temps
DECREASING
- sea ice, thickness/extent
-land ice
-frozen ground
-snow cover
-cold days
Natural Climate Change
1. Greenhouse gas concentrations
2. Volcanic activity
3. Changes in Solar Output
4. Changes in orbit/ tilt around the sun
5. Plate tectonics and ocean currents
6. Changes in Earths Albedo (land and atmosphere)
Natural Climate Change:
Mount Pinatubo
Mass Extinctions – 250 mya
Siberian Traps (volcanoes) = CO2, CH4, Ash, SO2
Natural Climate Change
Tree rings
Ice core
Sediment cores
Coral reefs
Sedimentary rocks
Anthropogenic Climate Change
Climate a<ected by human activity
What do we do? (burn fossil fuels, change land use)
Add GHG’s to atmosphere - disrupt energy balance- ehance the GHE
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