natural causes of cimate change

Question 1

variations in solar output

Answer 1

increase in magnetic solar activity -> increase in number of sunspots -> higher solar radiation -> areas surrounding sunspots radiate more energy -> compensate for the lower temperature of sunspots -> temperature increases

in 2000, peak in number of sunspots, increased global temp

Question 2

volcanic eruptions

Answer 2

erupt -> release SO2, dust, ash, water vapour
SO2 and water vapour reacts to form sulpher based particles
sulphur based particles and dust and ash reflect solar energy back into space -> temoerature are lower

mount pinatubo, phillipines, 1991, temperature decreased by 0.6oC