The human impact - global warming [add el nio]

Causes, Evidence and impacts

How do Temps show global warming

Mean world tempreture has increaced annualy scince 1910-2022

how does ocean salinity show global warming

• West indeian ocean = saltier due to high levals of eveporation

• North atlantic ocean = fresher due to melting ice caps

how odes acidfication show global warming

oceans absorbe 50% of Co2 and scince 1750 PH has fallen by 0.1%

how does bilogical indicators show global warming

• Bee-eaters in the UK every spring

• Malaria now increased in southern Europe

• blanching of coral reefs

What are the causes of global warming

Increaced Greenhouse gasses resulted in enhanced greenhouse effect traping more heat and the O-Zone layer of the atmosphere is thicker

what are the types of greenhouse gases

• Co2

• CFC’s

• methane

• nitrous oxides

what causes CO2

• Fossil fuels and deforestation

Can reamain in atmosphere for 62 yrs

what causes methane

cattle and landfill sites

what causes CFCs

Refrigerators, and old airosoles

• can remain in air for 50,000 years

what causes nitrous oxides

fertilisers and fossil fuels

what are the impacts of global warming

• Melting ice = less albedo = more absorption

• higher temp = more evaporation

• higher temp in high pressure areas = less rain

• permafrost releases methane

• ice melts = dark rocks = less albedo

• extreme weather e.g.. storms

• high sea levels = flooding

climate change

the increase in average temperature in the atmosphere and ocean

global warming

the long term increace in the earths average surface tempreture