Climate change Flashcards
Ice core analysis
Provides insight
Ocean acidification
Predicted to be so low in carbonate ions within a century to be corrosive to unprotected organisms
Rate of warming
2-3x rest of world as Albedo effect lessened by positive feedback loop
East
Slowing sea level rise by 0.1mm annually with ice sheet thickening, sea ice expanding due to precipitation making oceans less salty so increasing the temperature at which sea ice can form
West
Smaller warm based ice sheet more likely to slide in, 5m sea level rise if so
Peninsula
Most sensitive with temperature rise 5x rest of world
Larsen glacier
B collapsed 2002, fear for C-G
Tonnes of ice lost annually
150b
Krill effect
Shifting poleward for cooler waters
Sea ice change impact
Krill feed on bacteria on ice underside, emperor penguins need 9 months of ice so 2015-18 Halley Bay ice breaking meant nearly no chicks in 2nd largest colony survived
Antarctic and Southern Ocean Coalition
Formed by 30 NGOs in response to CRAMR threat, now 150, only NGO allowed in ATS meetings, calls to reduce emissions further in Polar Code, called for Marine Protected Area setup in Southern Ocean