Gerald Said:

Title needed for my case study on global warming.?

We Answered:

Global Warming: A Myth or Reality?
Global Warming: Natural or Man-made?
The World: Shaped by humans?
Does the world really take nature's course?
Where there's a man, there's global warming...

James Said:

doing global warming case study?

We Answered:

Try this:

http://img.dailymail.co.uk/i/pix/2008/05…

Jamie Said:

Does Human Activity Case Global Warming Or Is It A Naturual Cause?

We Answered:

NATURAL & MANMADE WARMING
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The underlying warming is natural but the recent warming of past decades is attributable to human activities. The vast majority of warming is natural and this maintains a more or less steady equilibrium, it’s the component over and above this which is the cause for concern. Based on the current average global temperatures then approximately 3% of the total warming is manmade, the other 97% is natural.

The greenhouse gases in the atmosphere warm Earth, most of these occur naturally. They have always been there but the concentrations change over periods of millions of years. As the concentrations change the temperature of Earth fluctuates. These gases retain heat and provide Earth with a moderated climate, one that is suitable for sustaining life. If you removed all the greenhouse gases from the atmosphere the n the temperature of Earth would fall by some 33°C (59°F).

Since the end of the last ice age the temperature of Earth has been relatively stable, overall it’s dropped slightly and the overall rate of change has been less then 1°C in 10,000 years. Here’s a graph http://www.globalwarmingart.com/images/b…

Since the onset of industrialisation we have emitted large amounts of greenhouse gases into the atmosphere and this has affected the amount of heat that can be retained. In this relatively short period of time temperatures have been rising much faster than they did previously. Here’s another graph http://www.globalwarmingart.com/images/c…

Most of the warming has occurred in the last 100 years. Back then the average temperature around the globe was 13.588°C and today it is 14.574°C, in this 100 year period temperatures have risen by just under 1°C.

Whilst 1% may not sound a lot, it is a significant figure in nature. A 1% rise in sea levels for example would see many of the world’s major cities submerged and a 1% increase in the amount of heat from the Sun would result in runaway global warming with immediate disastrous consequences.

In summary, 33°C of the warming on the planet is down to natural causes and 1°C is down to human activities.


RANDOM FACTS
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• Each person on the planet is responsible for an average of 5 tons of CO2 emissions each year, in the developed nations it's 11 tons, in the US it's 19 tons.

• The last 12 months have been the hottest 12 month period on record.

• 9 of the 10 hottest years on record have occurred since 2000, the exception is 1998 which is the 2nd hottest year.

• It's estimated that by the year 2100 at least 2 billion people will have bee adversely affected by climate change.

• The world naturally warms and cools. In the past the polar regions were covered with forests.

• The last time the world was as warm as it is now was some 140,000 years ago.

• In the last 25 years temperatures have risen by 0.0156°C a year, in the 10,000 years prior to the Industrial Revolution temperatures rose 0.0001°C a year.

• Temperatures fell in the middle of the 20th century because our atmosphere was so polluted with factory emissions that it blocked out heat and light from the sun.

• The greenhouse effect works because short wavelength sunlight (solar radiation) passes through the blanket of greenhouse gases but the longer wavelength heat from earth (thermal radiation) gets trapped.

• By volume the most prevalent greenhouse gas is water vapour, accounting for up to 4% of the atmosphere.

• Excluding water vapour, carbon dioxide accounts for over 99% of all greenhouse gases but because it's not as effective at retaining heat as other greenhouse gases it only accounts for 72.3% of manmade global warming.

• In the last 200 years levels of CO2, methane and nitrous oxide have risen considerably. CO2 has risen from 280 to 398 ppmv, nitrous oxide from 270 to 318 ppbv and methane from 700 to 1745 ppbv.

• Levels of CO2 are rising at least 100 times as fast as natural variations should allow.

• When snow falls it traps air, in time this compresses to form ice. Ice core samples stretching back nearly 1,000,000 years allow us to accurately analyse what was in the air when the snow fell.

• The biggest single manmade contributors to CO2 emissions are deforestation and the burning of fossil fuels, the biggest contributor of methane and nitrous oxide is agriculture.

• Nature absorbs 3 billion tons more CO2 each year than it releases. In 2009 humans produced the equivalent of 44 billion tons of CO2.

• The heat energy received from the sun is 1366 W/m²/yr (Watts per square metre per year), naturally it varies by 1.3 W/m²/yr - about a 0.1% difference between minimum and maximum output.

• Volcanoes cause global cooling. They emit huge amounts of sulphur dioxide and other gases, this blocks out sunlight and cools the planet. Following the eruption in 1991 of Mount Pinatubo - the biggest volcano in recent history - global temperatures fell by about 0.5°C.

• Global warming leads to increased precipitation is some places, the higher temperatures evaporate more water from the seas and oceans which subsequently falls as rain.

• Climate change has resulted in more storms, droughts, floods and heavier rainfall; these in turn cause erosion, famine, disease and other problems.

• Over 1 million square kilometres of Siberian Permafrost has melted in the past few years, this has created over 1000 new lakes and made available much agricultural land.

• Sea levels are rising faster than at any time since the glacial retreat some 10,000 years ago - averaging about 3mm a year, 30 times as fast as they were rising before the onset of industrialisation.

• If the Arctic Ice Cap melted there would be no change in sea levels, this is because it's a mass of floating ice and is already displacing it's own mass of sea water.

• If all the ice in all the world melted sea levels would rise by 80.32 metres.

• Coastal towns and cities are at risk from rising sea levels including some of the world largest cities such as London, Los Angeles, New York, Boston, New Orleans, Charleston and Miami. Worldwide hundreds of millions could be forced to evacuate.

• Increasing levels of CO2 entering the oceans is causing a drop in pH levels and this is adversely affecting some marine life including corals, plankton and shellfish.

• Grass now grows in parts of Antarctica.

• Animals are migrating further north and south from the equator each year. Butterflies can now be found 200km further north than they previously existed.

• Global warming means fewer people will die from cold related conditions such as hypothermia, it also means more people will die from heat related conditions such as heat stroke. Overall more will die.

• 35,000 people (maybe more) died during the 2003 heatwave in northern Europe; France was especially hard hit.

• Warmer temperatures are conducive to the breeding and spread of rats, mice, other rodents, ticks, mosquitoes and other vectors for disease.

• In the last 100 years, 50% of the world's glaciers outside the polar regions have melted. The effects of glacial melt include flooding, landslides, water shortages, avalanches and loss of habitat.

• In Greenland the Kangerdlugssuaq Glacier is retreating by 40 metres a day and will soon disappear altogether.

• The developing nations are expected to be the worst affected by global warming.

• In 2007 one person is dying every three minutes as a result of global warming, this figure is expected to double by 2020.

• A quarter of the species of animals and plants could be extinct by 2050. Species that are threatened include penguin, bear, turtle, caribou, walrus, plankton, krill, whale, crab and seal.

• Rising temperatures have a huge impact on food production, a 1°C rise equates to a 10% global loss in grain production and areas already facing food shortages will be hardest hit.

• The US is the biggest emitter of greenhouse gases accounting for 24.3% of the world total, China is next at 14.5% followed by Russia 5.9%, India 5.1% and Japan 5.0%.

• The US is the country with the highest number of sceptics and a March 2007 Gallup Poll found that 16% of Americans weren't worried about global warming. This compares to 1% of Japanese and about 5% of Europeans. Nicaragua has the lowest number of sceptics - none out of the 1000+ who were surveyed.

• Global warming was first put forward as a concept in 1811. In 1896 the link between greenhouse gas emissions, global warming and climate change was established. Scientists have been worried about global warming ever since, much longer than it's been a political issue.

• The earth wobbles about like an imbalanced spinning top and over very long periods of time this contributes to global warming and cooling, these cycles are called Milankovitch Cycles.

Alicia Said:

Doing a case study on glob al warming could you help?

We Answered:

You could begin by learing simple things like punctuation, spelling, and attention to detail.

For example, I might wonder what kind of Glob Al is from the text of your question.

Maxine Said:

what else could i say for Global Warming case study?

We Answered:

<<a report by Mr Thompson, he states that Mars, Jupiter and Pluto are showing effects of warming up, similar to Earth.>>

pluto is warming? really? you've seen such a report? please post a link.
pluto is moving farther from the sun.
if there's any change in temperature, it's cooling.
but it's far enough away that it's unlikely to change significantly.
it's just cold.

1 year on mars = 2 years on earth.
however, mars has a fairly eccentric orbit.
http://cmex.ihmc.us/SiteCat/sitecat2/Mar…
while i often see reports of warming, they never relate that to the effects of the orbit.

clearly if your teacher denies global warming, then you're on the right track.
if your teacher does not, then you're going to have to provide references to back up your assertions.
lacking that, you can probably expect to be marked down.

Fred Dalton Thompson is a politician.
that's not where you should be getting your science from.
i've no idea who Mr Thompson is.

this is the real scoop.

NAS, NOAA, NSF, NASA, EPA, MIT, UCLA and many other honest science organizations all agree. AGW (Anthropogenic Global Warming) is a serious problem.

http://solar-center.stanford.edu/sun-on-… <== sunspots compared to CO2 and temperature.

here's how it works.

http://dels.nas.edu/dels/rpt_briefs/clim… <== here's a good description.
http://www.funnyweather.org/ <== this is a more lighthearted link.