Global warming

Question 1

GW definition

Answer 1

A gradual increase in the overall temperature attributed to greenhouse gas effect

Question 2

Quaternary period

Answer 2

last 2.6million years

Question 3

2 Quaternary periods

Answer 3

Pleistocene

Halocene

Question 4

The most recent holocene ____ was at its peak warmer than today

Answer 4

Subboreal

Question 5

3 pieces of evidence of climate change from ocean/ice cores

Answer 5

Oxygen isotope records
Carbon isotope record
Forams

Question 6

4 reasons GW is human caused

Answer 6

Greenhouse effect at highest levels in 420,000 years
Coal responsible for 43%
The sun’s radiative output hasn’t changed since 1978
3/4 of CO2 from fossil fuels in past 20 years

Question 7

2 reasons GW is natural

Answer 7

Volcanoes release 0.25giga tonnes/annum of CO2

El nino/ La Nina

Question 8

(3)La nina/El nino contradiction to global warming

Answer 8

Peak temperature rises occurring in 20th century occurred during El Nino including 1998 event where mean surface temperature rose 0.68’C
Trough temperature changes occurred during La nina including 1976 event had cooling effect of -0.08’C
98-99 La Nina event resulted in most severe drought in US history + 50k dead from Venezuelan landslide

Question 9

(2) Nino support of GW

Answer 9

Trend surface temperature still rises increasingly

Global warming has intensified events