paper 2 January mock figures Flashcards
(50 cards)
x/10 of the warmest years since 1880 have occurred since 2000?
10
ever since 1977 every year has been warmer than what average
2oth century average
athabasca glacier rate of retreat
1870-1950: 8m/year
1950-2005: 22m/year
montana glacier national park stats
used to have >150 glaciers in 1800s, now has 25
warming at 2-3 times the speed of global avg temp rise
average sea level rise since 1900
rate now
1-2.5mm/year
now 3mm/year
ice loss form Greenland ice sheet increase
has increased seven-fold from 34b tonnes/year between 1992 and 2001 to 247bn tonnes/year between 2012 and 2016
sea level rise in dover vs Sweden
2.4mm rise per year
7.8mm fall per year in some areas eg furuogrund
atmospheric water vapour conc change
for every 1C rise in temp, x2 warming rate due to WV
4% conc in 1976 to 17% conc in 2016
earth temp without GHE
-18C (rather than 15C)
GWP of methane vs CO2
CH4: 25
CO2: 1
fraction of GHG emissions from land use changes/deforestattion.wetland dev/agriculture
1/3
% of land surface covered by agriculture
40%
% of worlds energy production from burning fossil fuels
87%, contributing 3/4 of worlds atmospheric carbon
global pop growth
1bn in 1800
8.1bn in 2024
eccentricity differences in solar radiation
30% between perihelion and aphelion
eccentricity time scale
LT 100,000 years
obliquity time scale and angle
41,000 year cycle
22 to 24.5 degrees
precession time scale
22,000 years
solar output time scale of cycle
11 years
% change in solar output min to max
0.1%
Laki eruption volcano stats
lava and poisonous gases for 8 months
1/4 of Icelands population died from resulting famine
2 rainy summers across Europe
John Murray quote
volcanic eruptions have sig effects on weather patterns for 2 to 4 years which in turn have socioeconomic consequences (and political)
mount pinatubo eruption stats
1991
20 million tonnes SO2 into stratosphere, earths climate cooled by 1.3C over a 3 year period
when did continents break up from Pangea
250 million years ago
