Climate Change

Question 1

Name 3 sedementary archives

Answer 1

lake sediments
peat bogs
ice

Question 2

Name 3 natural archives

Answer 2

paleoecological material
material protected from oxidation
accumulations of material

Question 3

Isotope delta 18O2 is heavier than 16O2, what is it related to and why

Answer 3

oceans because it’s too heavy to be evaporated

Question 4

What oxygen is present in oceans in glacial periods

Answer 4

delta 16O2 (less in ice more in oceans)

Question 5

What was the Green Sahara?

Answer 5

paintings found in 1800s show elephants, giraffes etc in the Sahara, a climate they can’t cope in today, between 6000-9000 years ago

Question 6

5 things the anthropogenic have caused

Answer 6

increased sea level
increased marine air temp
increased sea surface temp
increased land temp
decreased summer arctic ice

Question 7

What data is found from ice cores

Answer 7

temperature, humidity, volcanic activity, atmospheric composition

Question 8

Summarise the Milankovitch Cycles

Answer 8

Eccentricity refers to the orbit of earth around sun, ~100ka
Obliquety refers to the angle of the earth, ~41ka
Precession refers to the spinning of the earth, ~23ka