12th lecture: observed changes: Global Flashcards
What is Walkers circulation?
Its in tropical Pacific Ocean, driven by differences in sea surface temperature and pressure.
What is Southern oscillation?
Phenomenom about periodic changes in air pressure.
El Nino and La Nina are part of it
What is El Nino? (warm stage) By what it is created?
Weakening of Walker circulation (less push of warmer water into West side of Pacific ocean)- slowers movement of air masses in the sea.
What are impacts of El Nino in:
South America?
increased rainfalls and warming
What are impacts of El Nino in:
North America?
drier and warmer winters at NW US, wetter winters at SW USA, warming in western Canada
What are impacts of El Nino in:
Asia?
drought season in SE Asia and Northern Australia
What is La Nina?
Strengthening of Walker’s circulation-
Cold phase
What are negative impacts of El Nino and La Nina?
More frequent floods,
More frequent drought
Huricanes, tornadoes, tsunamis,
Increasing sea level-can cause land loss
What is ENSO? El Nino Souther Oscillation
The resulting effect caused by the interaction between the atmosphere and the Pacific Ocean.
What is the precursor of ground-level ozone?
nitrogen oxides
What kind of greenhouse gas is mainly produced from anaerobic processes?
methane
What was the first protocol regulating CFC?
Montreal
Which statement does not apply to the phenomenon of ENSO (El Nino Southern Oscillation)?
a.
The area where the phenomenon is located is affected by the Walker circulation.
b.
It has a hot and cold phase.
c.
The phenomenon caused by the interaction between the atmosphere and the Pacific Ocean.
d.
There are periodic changes in air pressure.
e.
It manifests with the demise of the Peruvian current.
e) peruvian sea