global warming

Question 1

how does the greenhouse effect work

Answer 1

incoming short wave radiation enter the atmosphere, some is re-radiated back as long wave radiation but some is trapped by greenhouse gases and heats up earth

Question 2

what are the 7 pieces of evidence of global warming

Answer 2

-increase in global temps
-ocean salinity
-melting sea ice
-rising sea levels
-melting ice caps
-ocean acidification
-biological indicators

Question 3

since when has global temps been rising not due to natural factors

Answer 3

1970

Question 4

examples of ocean salinity and its impact

Answer 4

-in western Indian Ocean due to evaporation ocean is saltier, in North Atlantic ice melting made it fresher
-thermohaline circulation slows down making EU colder

Question 5

what does melting sea ice do

Answer 5

lowers albedo so more heat is retained

Question 6

how much have sea levels rose and what is it due to

Answer 6

average of 3.1mm/year between 1992-2010
-due to melting ice caps and thermal expansion

Question 7

how much of co2 do oceans absorb

Answer 7

50%

Question 8

what does absorbing c02 do, and since when has the PH fallen

Answer 8

-causes carbonic acids
-since 1750 ph has fallen from 8.2-8.1

Question 9

what are the biological indicators of global warming

Answer 9

-mosquitos migrate= malaria in southern Europe
-blanching of coral reefs

Question 10

what is el niño

Answer 10

periodic warming of sea temperature across central and east central equatorial pacific that develop over N America in winter causing warmer temps

Question 11

what does El Niño influence

Answer 11

weather patterns, ocean conditions, marine fisheries

Question 12

what are 7 impacts of global warming

Answer 12

-melt arctic-lower albedo-more heating
-more evaporation= more moisture in air= cyclones etc.
-warmer temps=draughts
-heat waves-30,000 died in EU,2013
-permafrost melting=methane released
-more frequent and violent storms
-storm surges and flooding

Question 13

what is the atmospheric concentration of CO2 and how long does it stay in the atmosphere for

Answer 13

-400 parts per million
-62 years