Imperiled Freshwaters Quiz 4

Greenhouse gas effect

The effect that occurs when heat is retained by gases, such as CO2 (carbon dioxide), CH4 (methane), NOxs (nitrous oxide), and CFCS (chlorofluorocarbons) in the atmosphere

We compare rates of CO2 over

geologic and historic time

Threat multiplier

A factor that intensifies existing problems—such as resource scarcity, conflict, or instability—by making them more severe due to the impacts of climate change

Impacts of climate change depend on

Global location and system

Global location

climate change manifests differently depending on where you are

System

regional and local conditions will interact with climate change in different ways

Annual mean temp change (1850-1900)

Across warming levels, land areas warm more than ocean areas, and the Arctic and Antarctica warm more than the tropics

Annual mean precipitation change (1850-1900)

Projected to increase over high latitudes, the equatorial Pacific and parts of the moons

loss of ice cover leads to...

More sunlight, increased temperatures, more production, land longer stratification

Factors contributing to stratification lasting longer

warmer temperature —> warmer summer surface water, larger density difference between layers —> stratification lasts longer

When stratification lasts longer…

so does anoxia

Lake evaporation to increase by __ by end of century

16%