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Britain's winter ends tomorrow with further indications of a striking environmental change: snow is starting to disappear from our lives.
Global warming, the heating of the atmosphere by increased amounts of industrial gases, is now accepted as a reality by the international community.
According to Dr David Viner, a senior research scientist at the climatic research unit (CRU) of the University of East Anglia,within a few years winter snowfall will become "a very rare and exciting event".
Weather is what’s happening outside the door right now; today a snowstorm or a thunderstorm is approaching. Climate, on the other hand, is the pattern of weather measured over decades.
Hotter air around the globe causes more moisture to be held in the air than in prior seasons. When storms occur, this added moisture can fuel heavier precipitation in the form of more intense rain or snow.
Some regions of the country have seen as much as a 67 percent increase in the amount of rain or snow falling in the heaviest storms — and an updated version of this figure from the draft National Climate Assessment suggests this increase may have risen to 74 percent between 1958 and 2011.
At the same time, because less of a region’s precipitation is falling in light storms and more of it in heavy storms, the risks of drought and wildfire are also greater. Ironically, higher air temperatures tend to produce intense drought periods punctuated by heavy floods, often in the same region.
Originally posted by camaro68ss
Yes the climate changes and has in the past and will in the future. Is it brought on by man? i doubt it. All you need is a valcano to burp and it cancels out all CO2 ever emitted by mankind.
Our understanding of volcanic discharges would have to be shown to be very mistaken before volcanic CO2 discharges could be considered anything but a bit player in contributing to the recent changes observed in the concentration of CO2 in the Earth's atmosphere.
1824 Joseph Fourier calculated the Earth would be colder without an atmosphere.
1859 John Tyndall discovers some gases block infrared radiation, and proposes changes in their concentration could bring climate change.
1896 Svante Arrhenius first calculates global warming from human-produced CO2 emissions.
1897 Thomas Chrowder Chamberlin produces a global carbon exchange model including feedbacks.
1938 Guy Stewart Callendar says CO2 greenhouse global warming is happening.
1956 Gilbert Plass says adding CO2 to the atmosphere has a major effect on the radiation balance.
1957 Roger Revelle finds that CO2 produced by humans will not be readily absorbed by the oceans.
1958 Venus’ greenhouse effect (which raises the atmosphere’s temperature above the boiling point of water) is observed by telescope.
1960 Charles Keeling detects an annual rise in the Earth’s atmospheric CO2.
1968 Studies say Antarctic ice sheets may collapse, which would raise sea levels big time.
Originally posted by BritofTexas
reply to post by Hopechest
Actually we've been studying the Climate and Atmosphere for almost 200 years.
1824 Joseph Fourier calculated the Earth would be colder without an atmosphere.
1859 John Tyndall discovers some gases block infrared radiation, and proposes changes in their concentration could bring climate change.
1896 Svante Arrhenius first calculates global warming from human-produced CO2 emissions.
1897 Thomas Chrowder Chamberlin produces a global carbon exchange model including feedbacks.
1938 Guy Stewart Callendar says CO2 greenhouse global warming is happening.
1956 Gilbert Plass says adding CO2 to the atmosphere has a major effect on the radiation balance.
1957 Roger Revelle finds that CO2 produced by humans will not be readily absorbed by the oceans.
1958 Venus’ greenhouse effect (which raises the atmosphere’s temperature above the boiling point of water) is observed by telescope.
1960 Charles Keeling detects an annual rise in the Earth’s atmospheric CO2.
1968 Studies say Antarctic ice sheets may collapse, which would raise sea levels big time.
How long has climate change been studied?
And let's not forgot the studying of Ice cores.
Originally posted by Hopechest
Hehe, 200 years in the history of earths climate is not even a beginning. Its not even a fraction of 1% of the total time of our current era.
The oldest continuous ice core records to date extend 123,000 years in Greenland and 800,000 years in Antarctica. Ice cores contain information about past temperature, and about many other aspects of the environment.
Originally posted by BritofTexas
Originally posted by Hopechest
Hehe, 200 years in the history of earths climate is not even a beginning. Its not even a fraction of 1% of the total time of our current era.
You obviously missed the last part of my post mentioning Ice Cores.
The oldest continuous ice core records to date extend 123,000 years in Greenland and 800,000 years in Antarctica. Ice cores contain information about past temperature, and about many other aspects of the environment.
Ice cores and climate change
So we can reasonably study the Climate over the past 800,000 years.
Hehe, 200 years in the history of earths climate is not even a beginning. Its not even a fraction of 1% of the total time of our current era.
Originally posted by purplemer
reply to post by Hopechest
Hehe, 200 years in the history of earths climate is not even a beginning. Its not even a fraction of 1% of the total time of our current era.
There are many ways we can see the climate back further than 200 years. Ice core samples show CO2 concentrations over time. Sediment and certain rock types can be analysed for diatom concentration and type. This shows bioregional changes including temperature. Pollen samples can be take from peat bogs.... etc
Originally posted by gladtobehere
Back in the year 2000, we were told that "climate change" aka "global warming" will mean no more snow:
Ice cores are only applicable to this current Ice-Age. They don't tell us anything about the previous ones throughout the history of earth. It would be foolish to imagine they've all had the exact same effect. And ice-cores do not tell you weather patterns, only climate information
The Earth has experienced at least five major ice ages in its 4.57 billion year history: the Huronian glaciation (2.4 to 2.1 billion years ago), the Sturtian/Marinoan glaciation (710 to 640 mya), the Andean-Saharan glaciation (460 to 430 mya), the Karoo Ice Age (350 to 260 mya) and the most recent Ice Age, which is currently ongoing (40 to 0 mya). The definition of an Ice Age is a long-term drop in global temperatures from the historical norm, accompanied by an extension of continental ice sheets. Each Ice Age is cyclical, generally on timescales of 44,000 and 110,000 years, during which glacial ice rhythmically extends and recedes.