This is the statistically correct way to represent relative human contributions to the greenhouse effect. From Table 4a, both natural and man-made greenhouse contributions are illustrated in this chart, in gray and green, respectively. For clarity only the man-made anthropogenic contributions are labeled on the chart.
Natural climate variability over recent geological time is greater than reasonable estimates of potential human-induced greenhouse gas changes. Because no tool is available to test the supposition of human-induced climate change and the range of natural variability is so great, there is no discernible human influence on global climate at this time.
Perhaps, but there may be other, more scientific reasons. As Peter Sciaky, a retired geologist, writes: A geologist has a much longer perspective.
There are several salient points about our earth that the greenhouse theorists overlook or are not aware of. The first of these is that the planet has never been this cool.
There is abundant fossil evidence to support this — from plants of the monocot order such as palm trees in the rocks of Cretaceous Age in Greenland and warm water fossils in sedimentary rocks of the far north. The present global warming is hardly unique. No environmental conference, such as Kyoto, has ever invited a geologist, a paleontologist, a paleo-climatologist.
It would seem beneficial for any scientific investigatory to include such scientific disciplines. Among all my liberal and leftist friends and I am certainly one of thoseI know not a one who does not accept that global warming is an event caused by mankind.
I do not know one geologist who believes that global warming is not taking place. I do not know a single geologist who believes that it is a man-made phenomenon. The chart to the right shows temperature and carbon dioxide levels from to now.
That presents quite a different picture. Only years ago, the planet was quite cold, a period known as the Little Ice Age roughly Before that, though, during the Medieval Warm Period roughlythe planet was a degree or two Celsius warmer than today, to the point where Greenland was warm enough for settlement by the Vikings.
Figure 1 is a graph of the last thousand years based on work by climatologist H. IPCC hockey stick graph of the past 1, years Over the past 4, years, the planet has also experienced warm and cool periods, again quite naturally.
In fact, warm times seem to recur on a cycle of about 1, years, as Figure 3 shows. Warming every 1, years or so. What do we see? A roller-coaster ride of glacials cold times and interglacials warm timeson a cycle of aboutyears. A glacial cycle everyyears By the way, this is the chart, based on ice core readings taken in Antarctica, that Gore uses in his film An Inconvenient Truth.Global warming is the current increase in temperature of the Earth's surface (both land and water) as well as it's atmosphere.
Average temperatures around the world have risen by °C (°F) over the last years about two thirds of this increase has occurred since 2 In the past, when the Earth experienced increases in temperature it was the result of natural causes but today .
This essay on global warming describes the causes, effects of global warming and also the states the solution for its prevention.
The temperature of the Earth is maintained at a safe level making it possible for various life forms including humans to exist. PTE Academic essay Global Problems, climate change, global warming. PTE Academic essay Global Problems, climate change, global warming There are various root causes that need to be taken into consideration when we talk about the problem of clean and unpolluted environment.
PTE Books-Buy these books for PTE Academic exam . The effects of global warming are the environmental and social changes caused (directly or indirectly) by human emissions of greenhouse r-bridal.com is a scientific consensus that climate change is occurring, and that human activities are the primary driver.
Many impacts of climate change have already been observed, including glacier retreat, changes in the timing of seasonal events (e.g. Nov 29, · New research yields old result: Climate warming slow, steady. Observed value is half that of CMIP5 climate models. HUNTSVILLE, Ala.
(Nov. 29, ) — The rate at which Earth's atmosphere is warming has not significantly accelerated over the past 23 years, according to research at The University of Alabama in Huntsville (UAH).
If you take away. Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth’s surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and .