Climate Change Flashcards
Climate change is
a long-term change in the
average weather patterns that have come to
define Earth’s local, regional and global
climates.
Climate change is a long-term shift in global or
regional climate patterns. Often climate change refers
specifically to from
the mid-20th century to present.
the rise in global temperatures
Climate change refers to long-term shifts in temperatures and weather patterns. Such shifts can be natural, due to ?. But since the
1800s, ? have been the main driver of climate
change.
changes in
the sun’s activity or large volcanic eruptions,
human activities
Climate change refers to long-term shifts in temperatures and weather patterns. Such shifts can be natural, due to ?. But since the
1800s, ? have been the main driver of climate
change.
changes in
the sun’s activity or large volcanic eruptions,
human activities
Evidences (5)
Changing temperature and
precipitation patterns.
Increases in ocean temperatures,
sea level, and acidity.
Melting of glaciers and sea ice.
Changes in the frequency,
intensity, and
duration of extreme weather
events.
Shifts in ecosystem characteristics,
like the length of the growing season, timing of flower blooms, and
migration of birds.
The gases accumulated
in the atmosphere
prevent some of the heat
from radiating back out
into space and serve as a
thick enclosure that
causes the earth’s
temperature to rise
Greenhouse effect
It is the primary greenhouse gas contributing to
recent climate change.
Co2
enters the
atmosphere through burning fossil fuels, solid waste,
trees, and other biological materials, and because of
certain chemical reactions, such as cement
manufacturing.
Co2
absorbed and emitted naturally as part of the
carbon cycle, through plant and animal
respiration, volcanic eruptions, and ocean-
atmosphere exchange.
Co2
Both natural and human activities produce
Methane
For example, natural wetlands,
agricultural activities, and fossil fuel extraction and
transport all emit
Methane
It is produced mainly through agricultural
activities and natural biological processes.
Nitrous Oxide
Fossil
fuel burning and industrial processes also create
Nitrous Oxide
Chlorofluorocarbons,
hydrochlorofluorocarbons,
hydrofluorocarbons, perfluorocarbons, and
sulfur
hexafluoride, together called
F-gases,
are
often used in coolants, foaming agents, fire
extinguishers, solvents, pesticides, and
aerosol
propellants.
F gases
another greenhouse gas and plays a
key role in climate feedbacks because of its
heat-trapping ability.
Warer vapour
? air holds
more moisture than ? air.
Warmer, cooler
Therefore,
as greenhouse gas concentrations increase
and global temperatures
rise, the total amount of water vapor in the
atmosphere ?
also increases