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Threats to the Threats to the Biosphere Biosphere Biology Biology
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Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Jan 12, 2016

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Dale Walton
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Page 1: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Threats to the BiosphereThreats to the BiosphereBiologyBiology

Page 2: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

BiosphereBiosphere

• The outer portion of Earth where all living organisms exist

- deepest ocean trench up into atmosphere

Page 3: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Since Industrial Revolution…Since Industrial Revolution…Earth’s global temperature is now Earth’s global temperature is now

at hottest point in 13,000 yearsat hottest point in 13,000 years

• What is this increase in temperature called?

• What is the name of this phenomenon?

• NOAA data 2010 link

Page 4: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

• Global Warming is caused by the

Greenhouse Effect

• We now call global warming-

CLIMATE CHANGE

Page 5: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Greenhouse gasesGreenhouse gases

• Water Vapor H20• Carbon Dioxide CO2

• Methane CH4

• Nitrous Oxide NOx• Fluorocarbons CFC’s (part of Haloalkanes)• Ozone O3

• Which one above is the cause of global warming? ------

Page 6: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

• Water Vapor H20 same levels

• Carbon Dioxide CO2 increased

• Methane CH4 doubled since 1800

• Nitrous Oxide NOx increased

• Fluorocarbons CFC’s now banned

• Ozone (STRATOSPHERIC) DROPPED

Page 7: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Evidence of stratospheric Evidence of stratospheric Ozone DepletionOzone Depletion

• link to ozone depletion movie

Page 8: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Depletion of Ozone LayerDepletion of Ozone Layer

• O3 is naturally occurring in Stratosphere

• Protects us from UV-B radiation

• Often called “good” ozone

Page 9: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

““good” Ozone is depleted by CFC’sgood” Ozone is depleted by CFC’s

• Chlorofluorocarbons

• Used in older air conditioners, refrigerators, and in industry

Page 10: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Tropospheric OzoneTropospheric Ozone• “bad ozone” Formed from Nitrous

oxide (found in automobile exhaust) and VOC’s

• Unhealthy for many people• EPA issues ozone alerts for large cities

• Link to EPA Air Now current air quality map

Page 11: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Sources Sources of NOx of NOx

and and VOCVOC

Page 12: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Acid RainAcid Rain

• Rain is typically 5.0pH in Wisconsin, anything less than 5.4pH, we call it acid rain

• Where is acid rain a problem in U.S.?

• What causes Acid Rain?

Page 13: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Map of US acid rain depositionMap of US acid rain deposition

Page 14: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Illustration of acid rain productionIllustration of acid rain production

Page 15: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Is there a chemical that is a common Is there a chemical that is a common source of most threats to the source of most threats to the

Biosphere?Biosphere?• Hint: it is found in vehicle exhaust

•Nitrous oxides (NOx)

Page 16: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

What can each of us do?What can each of us do?• Car pool, walk, ride bikes, use

public transportation, reduce, use less, change light bulbs to fluorescent or LED, use wind, solar, renewable fuels, drive smaller cars if possible, elect politicians that support global environmental policies

Page 17: Threats to the Biosphere Biology. Biosphere The outer portion of Earth where all living organisms exist- deepest ocean trench up into atmosphere.

Current Arctic ice data Current Arctic ice data

• Data shows a continual reduction in Arctic Ice in recent years

• pp showing ice loss from 1979-2007

• NASA daily arctic ice data (ice movement) from 2005-2006

• NOAA model projections from 1900 through 2100