Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s climate. There is great debate among many people, and sometimes in the news, on whether global warming is real (some call it a hoax). But climate scientists looking at the data and facts agree the planet is warming. While many view the effects of global warming to be more substantial and more rapidly occurring than others do, the scientific consensus on climatic changes related to global warming is that the average temperature of the Earth has risen between 0.4 and 0.8 °C over the past 100 years. The increased volumes of carbon dioxide and other greenhouse gases released by the burning of fossil fuels, land clearing, agriculture, and other human activities, are believed to be the primary sources of the global warming that has occurred over the past 50 years. Scientists from the Intergovernmental Panel on Climate carrying out global warming research have recently predicted that average global temperatures could increase between 1.4 and 5.8 °C by the year 2100. Changes resulting from global warming may include rising sea levels due to the melting of the polar ice caps, as well as an increase in occurrence and severity of storms and other severe weather events.
8. IT IS…
Global warming is the term used to describe a gradual increase in the average temperature of the
Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s
climate.
9. Global Temperature
Anomaly
Global mean surface
temperature change from 1880
to 2014, relative to the 1951–
1980 mean. The black line is the
annual mean and the red line is
the 5-year running mean. The
purple bars show uncertainty
estimates.
10. SO…
There is great debate among many people, and sometimes in the news, on whether global warming
is real (some call it a hoax). But climate scientists looking at the data and facts agree the planet is
warming.
While many view the effects of global warming to be more substantial and more rapidly occurring
than others do, the scientific consensus on climatic changes related to global warming is that the
average temperature of the Earth has risen between 0.4 and 0.8 °C over the past 100 years. The
increased volumes of carbon dioxide and other greenhouse gases released by the burning of fossil
fuels, land clearing, agriculture, and other human activities, are believed to be the primary sources
of the global warming that has occurred over the past 50 years. Scientists from the
Intergovernmental Panel on Climate carrying out global warming research have recently predicted
that average global temperatures could increase between 1.4 and 5.8 °C by the year 2100. Changes
resulting from global warming may include rising sea levels due to the melting of the polar ice caps,
as well as an increase in occurrence and severity of storms and other severe weather events.
11.
12. Global Gaseous Emissions
Fossil fuel related carbon
dioxide (CO2) emissions
compared to five of the IPCC's
"SRES" emissions scenarios,
published in 2000. The dips are
related to global recessions.
24. IN BRIEF
The exchange of incoming and outgoing radiation that warms the
Earth is often referred to as the greenhouse effect because a
greenhouse works in much the same way.
Incoming UV radiation easily passes through the glass walls of a
greenhouse and is absorbed by the plants and hard surfaces inside.
Weaker IR radiation, however, has difficulty passing through the glass
walls and is trapped inside, thus warming the greenhouse. This effect
lets tropical plants thrive inside a greenhouse, even during a cold
winter.
A similar phenomenon takes place in a car parked outside on a cold,
sunny day. Incoming solar radiation warms the car's interior, but
outgoing thermal radiation is trapped inside the car's
closed windows.
25.
26. Energy in… Energy out
There's a delicate balancing act occurring every day all across the Earth, involving the radiation the
planet receives from space and the radiation that's reflected back out to space.
Earth is constantly bombarded with enormous amounts of radiation, primarily from the sun. This
solar radiation strikes the Earth's atmosphere in the form of visible light, plus ultraviolet (UV),
infrared (IR) and other types of radiation that are invisible to the human eye.
UV radiation has a shorter wavelength and a higher energy level than visible light, while IR radiation
has a longer wavelength and a weaker energy level. About 30 percent of the radiation striking
Earth's atmosphere is immediately reflected back out to space by clouds, ice, snow, sand and other
reflective surfaces, according to NASA. The remaining 70 percent of incoming solar radiation is
absorbed by the oceans, the land and the atmosphere. As they heat up, the oceans, land and
atmosphere release heat in the form of IR thermal radiation, which passes out of the atmosphere
and into space.
It's this equilibrium of incoming and outgoing radiation that makes the Earth habitable, with an
average temperature of about 59 degrees Fahrenheit (15 degrees Celsius), according to NASA.
Without this atmospheric equilibrium, Earth would be as cold and lifeless as its moon, or as blazing
hot as Venus. The moon, which has almost no atmosphere, is about minus 243 F (minus 153 C) on
its dark side. Venus, on the other hand, has a very dense atmosphere that traps solar radiation; the
average temperature on Venus is about 864 F (462 C).
Heat is being trapped in the Earth, it is not escaping- that is why it is a major concern for us.
Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s climate. There is great debate among many people, and sometimes in the news, on whether global warming is real (some call it a hoax). But climate scientists looking at the data and facts agree the planet is warming. While many view the effects of global warming to be more substantial and more rapidly occurring than others do, the scientific consensus on climatic changes related to global warming is that the average temperature of the Earth has risen between 0.4 and 0.8 °C over the past 100 years. The increased volumes of carbon dioxide and other greenhouse gases released by the burning of fossil fuels, land clearing, agriculture, and other human activities, are believed to be the primary sources of the global warming that has occurred over the past 50 years. Scientists from the Intergovernmental Panel on Climate carrying out global warming research have recently predicted that average global temperatures could increase between 1.4 and 5.8 °C by the year 2100. Changes resulting from global warming may include rising sea levels due to the melting of the polar ice caps, as well as an increase in occurrence and severity of storms and other severe weather events.
This was proposed in 2000
The coloured lines are the predictions of various sources.
Irradiance, in radiometry (measurement of electromagnetic radiation) has the SI unit of irradiance is the watt per square meter (W/m2)
Loss of forests contributes as much as 30 percent of global greenhouse-gas emissions each year--rivaling emissions from the global transportation sector.
Although the amounts of CFCs in the atmosphere are very small, measured in parts per trillion (million million), they do contribute significantly to the enhancement of the natural greenhouse effect, because they are very good at trapping heat.
Burning fossil fuels releases carbon dioxide, also known as CO2, into the atmosphere. This adds carbon that has been out of circulation for millions of years directly to the atmosphere.
Again Coal and Wood are a part of Fossil Fuels which contribute to the increase in Carbon Dioxide which is a main Greenhouse Gas.
No doubt human population growth is a major contributor to global warming, given that humans use fossil fuels to power their increasingly mechanized lifestyles. More people means more demand for oil, gas, coal and other fuels mined or drilled from below the Earth’s surface that, when burned, spew enough carbon dioxide (CO2) into the atmosphere to trap warm air inside like a greenhouse.
These are the 75 Countries that have agreed to implement the rules imposed by the UN in the Copenhagen Climate Change Conference in 2009
And we all probably feel that these are how the conferences work…
And we all probably feel that these are how the conferences work…
I hope I haven’t been an energy vampire, sucking the energy out of you.
