Summary: Effects of global warming

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					Summary: Effects of global warming
Agriculture
   - Shifts in food growing areas
   - Changes in crop yields
   - Increased irrigation demands
   - Increased pests, crop diseases and weeds in warmer areas

Biodiversity
   - Extinction of some plant and animal species
   - Loss of habitats
   - Disruption of aquatic life

Forests
   - Changes in forest composition and locations
   - Disappearance of some forests
   - Increased fires from drying
   - Loss of wildlife habitat and species

Sea level and Coastal Areas
   - Rising sea levels
   - Flooding of low lying islands and cities
   - Flooding of coastal estuaries, wetlands and coral reefs
   - Beach erosion
   - Disruption of coastal fisheries
   - Contamination of coastal aquifers with salt water

Weather extremes
  - Prolonged heat waves and droughts
  - Increased flooding from more frequent, intense, and heavy rainfall in some areas

Water resources
  - Changes in water supply
  - Decreased water quality
  - Increased drought
  - Increased flooding

Human population
  - Increased deaths
  - More environmental refugees
  - Increased migration

Human health
  - Increased deaths from heat and disease
  - Disruption of food and water supplies
  - Spread of tropical diseases to temperate areas
  - Increased respiratory diseases and pollen allergies
  - Increased water pollution from coastal flooding
Action to reduce carbon dioxide                    Carbon dioxide Reduction
emissions
Drive fuel efficient cars, walk, cycle, car        9 kg / gallon of petrol saved
pool, and use mass transit
use energy efficient appliances                    Up to 1400kg per year
Insulate walls and ceilings                        Up to 900kg per year
Reduce garbage by recycling and reusing            450kg for 25% less garbage per year
Seal windows and doors                             Up to 450 kg per year
Insulate hot water heater
Use compact florescent bulbs                       230kg per year per bulb
Wash laundry in cold water                         Up to 230 kg per year for 2 loads per week
Use low flow shower head                           Up to 140kg per year



Skeptics
All attempts to link specific recent outbreaks to climate change cannot survive a confrontation
with the facts. In all cases, local conditions (such as the banning of the insecticide DDT, land use
changes, or foreign contact) account for expansions of disease vectors or increases in infection
rates.
Nobody denies that CO2 is increasing. But changes in global temperature are better correlated
with changes in solar activity. Solar magnetic flux shows trends similar to that for temperatures
from 1880 to the present. Of thirteen populations of polar bears in Canada two are growing, two
are in decline, the rest are stable. The growth is in areas where there is warming, the decline
where there is cooling.
Only two per cent of ice floats, so if that melts it will have little impact on sea levels. Ice is
increasing in size in parts of the Antarctic, balancing out any melt. Melting may be due to the
Atlantic Multi-decadal Oscillation (AMO). The AMO is an ongoing series of long-duration
changes in the sea surface temperature of the North Atlantic Ocean, with cool and warm phases
that may last for twenty to forty years at a time and a difference of about 0.5°C between
extremes. These changes are natural and have been occurring for at least the last 1000 years.
Since 1976 the world has warmed at a remarkable constant and non-alarming rate of 0.17oC per
decade, and this is not a problem.
The fact that greenhouse gas emissions add heat energy to the climate system and are bound to
warm the planet to some extent has never been in doubt. The real question is how much the
climate will warm, how fast, and with what effects. The Gulf Stream is a wind-driven system that
depends on the earth’s spin and lunar tides, not on salt. There have always been patterns of
rainfall variability over time in all areas. There have been periods of abnormally high
temperatures in the past – such as in the medieval period. There is no change globally in the
frequency of cyclones over the past thirty-five years. Some portion of the 0.5oC warming of the
sea surface temperature is due to the cyclical Atlantic Multi-decadal Oscillation (AMO). This
may be a forest management problem. The beetles like thick, old-growth forests. Thinning the
forests will solve the problem.

				
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posted:8/31/2012
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