History/Past
what is global extinct
gone for ever from the earth
what is the negative feedback system
higher co2 promotes more plant life and more plants decreases co2 levels
What is global warming?
the warming of the earth´s oceans, landmasses and atmosphere.
how much has the sea levels risen
10-25 cm
What happens to coral reefs during global warming
The coral reefs bleach and lose color
What is the Pleistocene Epoch
the most recent ice age
what is the positive feedback system
high co2 levels promote faster decomposition which creates more co2
What is global climate change?
changes in the climate of the Earth
Who or what is causing most of the excess carbon dioxide?
Man-made activities such as fossil fuels and transportation
What changes about the ocean during global warming
The ocean acidifies
what is locally extinct
the species gone in the original place but found somewhere else
What is la Nina
cooler-than-normal ocean temperatures in the eastern Pacific Ocean near the equator
What is Global Change?
any chemical, physical, or biological change of the Earth
What are some non man-made causes of climate change?
volcanic eruptions, ¨wobble¨ on the axis (Milankovitch cycles), variations in cloud cover, and ocean currents.
what are forests in risk of
forest fires
Has the climate always been normal?
climate is never normal it is always changing throughout the centuries
What is el Nino?
when surface water in the equatorial Pacific becomes warmer than average and east winds blow weaker than normal
how much of the suns radiation is reflected back
1/3 of the suns radiation is reflected
does deforestation contribute to global warming
yes deforestation contributes to global warming
what changes about storms
storms intensify and become stronger
What is ecologically extinct
too few to play an ecological role
What is the name of the cycle were glaciers advance and retreat?
glacial and interglacial periods
what happens with the suns uv radiation
some is reflected and some is absorbed into the ozone layer
What is the main cause of climate change?
the excess amount of carbon dioxide trapped into the atmosphere.
What kind of storms form more with global warming
dust storms