climate change- natural causes Flashcards
tilt on earth
22.2 and 24.5 is the tilt of the earth. the mire it increases the more solar energy is received
this causes night and day BTW
eccentricity
the earth encounters more variation in the energy that the sun gives when the earth’s orbit is elongated than it does when earth’s orbit is more circular
every 100 000 years
precessions
every 26 000 years
affects places like Norway with long days in summer or long nights in winter.
a gradual change or wobble in the orientation of earth’s axis affects the relationship between the earth’s tilt or eccentricity
3 types of natural climate change
orbital theory
solar
volcanic
volcanic ash effects
blocks sun rays which reduces the temperature temporarily
volcanic eruption
the ash blocks sun rays which reduces the temperature temporarily
fine droplets are sulphar dioxide which turns to sulfuric acid. This acts like tiny mirrors reflecting the sun’s radiation.
causes temperature to drop
this could last for years
volcanoes and cooling of climate
volcanic winter
mount Tambora
in 1815 mount tambora erupted this caused the temperature to decrease by 0.4-0.7
many harvest failed too.
sunspot maximum
gives more heat and explosions
sunspot minimum
solar output reduces, low temperatures on earth
sunspot cycle duration
11 years
3 food crisis due to mount Tambora
world harvest failed
north America and Western Europe had a major food crisis
food prices increased sharply
food riots