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Biology 451 > 8. Global climate is in crisis because of recent human activity > Flashcards

8. Global climate is in crisis because of recent human activity Flashcards

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1
Q

what does IPCC say about climate change

A
  • humans have warmed climate unprecedented in last 2000 years
  • CO2 highest in 2 M years
  • sea level rising fastest
  • artic sea ice lowest level
  • glaciers retreat unprecedented
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2
Q

what environmetal changes have been seen due to climate change

A
  • more frequent and intense heat
  • heavier rainfall and more frequent
  • increasing drought
  • more fire weather
  • ocean warming, acidifying and loosing O2
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3
Q

unless immediatee large scales reductions of greenhouse gas emissions will be made, limiting warming to what degree is out of reach

A

1.5

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4
Q

evidence for climate crisis

A

desertification
wildfire
permafrost melting
coreal bleaching
rising sea levels

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5
Q

hottest year

A

2023

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6
Q

regional warming highest in what areas and in what months

A

northern pole area
dec-feb

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7
Q

CO2 hasn’t been this high since

A

homo sapiens evolved

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8
Q

upshot of CO2 was bout

A

3 million yeaers ago when australopithecus was dominant hominid

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9
Q

what species lived through all this

A

horseshoe crab

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10
Q

what is major driver of CO2 emissions

A

fossil fuel usage

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11
Q

which country has highest CO2 emissions

A

china

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12
Q

what type of glaciers are disappearing

A

high elevation seen in NA

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13
Q

glacier thickness has gone

A

thinner

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14
Q

moost heat is captured by

A

oceans

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15
Q

what has oceans capturing heat causeed

A

anoxic dead zones due to phytoplankton blooms

less O2 production

extreme weather events

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16
Q

what makes most O2 in atmosphere

A

phytoplankton

17
Q

higher spring and summer temperature mean…

A

snow melting faster
wildfire risk increase
dry areas becoming drier
more severe fires

18
Q

sea levels and climate change

A
  • storm surges
  • coastal erosion
  • groundwater inundation
  • small islands at risk
19
Q

what is sea rise consensus

A

1m sea rise

20
Q

oceans acidification , lowering pH

A
  • oceans abosrb CO2, more acid
  • corals and marine animals can’t produce calcium carbonate skeletons
  • shell formation issues
  • coral bleaching leads to this too, expulsion or algae from polyps
21
Q

natural disasters

A

more
extreme weathers
flood
drought

22
Q

prooblem with natural disaster

A

costly damages

23
Q

which province thinks least that climate change is happening, and which party

A

alberta, conservative

24
Q

drivers of climate change

A

GHGs
carbon based greenhouse gas
CO2
methane
nitrous oxide

25
Q

most emisions are thru what in daily life

A

electricity

26
Q

primary contributors of increased CO2 in atmosphere

A

fossil fuel, industry and land use change

27
Q

what are sinks for climate change

A

ocean
atmosphere
land

28
Q

emission by country

A

1.7% is from canada, but 3rd highest per capita

wealthiest countries are major contributors

29
Q

who does most emission

A

top 25 countries is 91.8%

30
Q

change in individual decisions

A
  • renewabl energy
  • flying less
  • less diet in animals protein
  • less cars
31
Q

war room

A

has not tried to disprove global heating, but they promote AB oil and gas

32
Q

oil sands in alberta

A

release more carbon than rest of canada combined

just greenhouse gas

not even including fossil fuel burning

33
Q

impacts of climate change

A
  • water availabiloty less
  • food production
  • health effect
  • infrastructure problems
  • biodiversity issues
34
Q

things attributed to changes due to humans

A
  • ocean acidification
  • hot temperatures
  • global water rise
  • glacier retreat
35
Q

what if we increase about 1.5 or 2.5 degrees

A

temperature increase

soil moisture change

more rain but doesn’t mean distrubution will be equal

health risk

food supply will yield less fish and maize, less nutrition

inland migration

36
Q

how will alberta experience climate change

A

heat and drought
more days with 30+
more days or rain
more extreme rain does not mean more soil moisture, patchy rains

37
Q

human violence with hotter and drier weather

A

hotter= more violent crime

more drought = more inter-group riots

increased risk of conflict

38
Q

denying climate change is…

A

political
republicans usually
conservatives usually

Biology 451 (13 decks)

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