how would the climate of ur hometown have been diffrent 150million yrs ago,based on its position on the planet
156563
Where I live now would have been part of a fore arc-subduction complex. At that time the western coast of the area that is now the United States was near the California-Arizona border, and the California-Nevada border. The Sierra Nevada was just starting to rise. A number of islands existed off the west coast that later became part of the North American plate. \n\nThe entire area was just above the equator. The environment was a desert biome. Worldwide, temperatures were warmer than they are today. There were no icecaps on the planet.  The plants that lived in what is now Southern California were dry-adapted (xeromorphic) to live in the hot arid to semi-arid environment.  Some conifers, trees with veined lobed leaves (Ginkophytes), rarely ferns, cycadophytes which look like a palm tree were all likely found growing in microclimates near the coast where there was more rainfall. The most impressive forms of animal life would have been several species of suaropods, which fed on conifers, ginkos and cyads. These were the dinosaurs with long necks and tails. Stegosaurus might have been feeding in the vegetation, and a bipedal carnivore called Ornitholestes may have preyed on them. \n\nSea life would have been abundant, and marine crocodiles may have been common. Large ichthyosaurs (marine reptiles) that reached 2-4 meters made swimming hazardous. Plesiosaurs were also likely to be present in coastal waters and may have preyed on the crocs. Sharks were abundant.  Fish might have been of a group known as bony fish, of which the lungfish and coelacanth are modern survivors. In the air Rhamphorhynchus, a flying reptile probably caught fish like pelicans do today. In shallow sea waters there were some strange looking bivalves known as Diceratids that often built shoals like modern day oysters do. Sea urchins, starfish, and crinoids lived in the shallow and shelf waters. Dragonflies and damselflies were present; also ants, butterflies, and grasshoppers lived in the vegetated areas. \n\n\nTo see a paleogeographic map go here and scroll down to the 150 Ma plate:\nhttp://jan.ucc.nau.edu/rcb7/jurpaleo.html\nHere is another map:\nhttp://jan.ucc.nau.edu/rcb7/150NAt.jpg\nBiome map for Late Jurassic:\nhttp://pgap.uchicago.edu/data-models.html\nPaper describing climate of Late Jurassic:\nhttp://www.geo.arizona.edu/~rees/2004-1.pdf
202191
About 2,000 years i think
1109816
Oldest Civilisation\nRich Heritage
373306
It is supposed to be more than 2000 years.\nSee reference article.
392244
This is complex theoram, and it happens to be taken from the exact idea of the previous ice age about 7000-10000 years ago in which only northern hemisphere froze over\nanother reason is dat the rate of pollution is higher in north then south (due to development) and effects of global warming shall be more drastic there.
186059
Climate would change dramatically due to the shift in solar energy focus from a loss of seasonal influence. The much more interesting point is the loss of magnetism, because the rotation center of the earth cannot parallel that of the magnetoshere and maintain magnetism. \n\nAtmospheric mixing would be different, global winds may change to more closely represent those observed on Jupiter, with banding rather than Rosby waves. Ocean currents begin to shift with wind pattern changes, species change migration routes, continental climates become more severe, and icing more prominent in the polar regions, shifting the balance of water storage and available energy absorption in lower latitudes. \n\nThink of an Antarctica on both poles with summer temps all the time within the lower 30 N and S. The reemergence of glaciers observed. Populations move to the equatorial regions. Economies change, agricultural production would be reduced, and fresh water supplies dwindle.
28165
climate or atmosphere
1091303
1854 does sound about right; see source below.  Basically it hasn't had anything substantial for a while; the last eruption before 1854 seems to be over 2,000 years ago.
112629
Very roughly 2 billion years ago.  But you should be aware of two points. \n\nThe first is that the date is a matter of considerable debate and it could easily be half a billion years either side of that.\n\nThe second is that the transition was extremely slow, starting with the addition of oxygen by inorganic processes and then taking a massive leap with the evolution of oxygen producing autotrophs.
589172
ask the native americans who have been here for 30,000 years!!!!!!
857599
I guess I'm one of those people who notices changes in my own state - winters are NOT the same - but I am aware that our planet has undergone changes in the past. Are humans having an effect? I'm sure of it. But how much? And how much of the changes we're seeing are completely natural in the grand scheme of things? I'm not prepared to answer.
826729
its been millions of years
182917
All depends on how far back in time.
49723
I would go back to about 400,000 years ago in what is now Southern Iraq or to about 33,000 years ago in the same area.  That is because I am VERY curious about what was going on there...\n\nHowever, I would NOT want to stay there and would DREAD going back in time to ANY place on the earth.  Most all previous times in nearly all places were very, very dangerous compared to living now.\n\nThe time we are born into is the best one for us.  \n\nNo matter what time a person is born into, it is their duty to WORK in THE PRESENT MOMENT of their time in order to make a BETTER FUTURE.\n\nYou can find out a little bit more about this on my blog  http://360.yahoo.com/ki_te_moana
468318
Not sure whether I am on your wavelength, but ... if you are referring to the fabled Golden Age of earth it's the time that modern-day archaeologists try to ignore because it just doesn't fit with their text books. On the celtic shelf (prehistoric Britain) the ice-age was at its maximum around 20,000 BC, and then it began to slowly melt. Over the next 5000 years ice receded and the sea levels rose and Britain (still attached to continent) began to take shape. By 15,000 BC it was totally ice-free. The people of modern-day Northern France had followed the ice northwards and quickly populated this new land, and the flora and fauna flourished. The period that followed is the 4000 years that historians like to leave out of lectures and TV archaeologists conveniently ignore. Imagine 4000 years of temperate weather in a green verdant land, easily defendable therefore generally peaceful, a time of plenty. This period is equal to the time period from raising the stones at Stonehenge to the present day. In my opinion this is the Golden Age, however it didn't last, around 11,000 BC the snow and ice moved back in and the northern half of Britain and Ireland was once again frozen and glaciated - this chilly situation lasted for around 1500 years and is known as the Younger Dryas period (which ended abruptly in 9600 BC and that's another subject that I could go on for hours about), but I hope that helps with your question about the Golden Age.
262988
Neat how the graph excludes prior dates.  20 years ago it was global cooling.\n\nThe temperature varies, greenhouse gasses come from natural occurrences (Krakatoa and Mt. Saint Helens spewed more greenhouse gasses in the air than man has produced in 10,000 years).  The earth recovers.  Liberal activists don't.
1170026
Global warming started long before the "Industrial Revolution" and the invention of the internal combustion engine. Global warming began 18,000 years ago as the earth started warming its way out of the Pleistocene Ice Age-- a time when much of North America, Europe, and Asia lay buried beneath great sheets of glacial ice.\n\nEarth's climate and the biosphere have been in constant flux, dominated by ice ages and glaciers for the past several million years. We are currently enjoying a temporary reprieve from the deep freeze.\n\nApproximately every 100,000 years Earth's climate warms up temporarily. These warm periods, called interglacial periods, appear to last approximately 15,000 to 20,000 years before regressing back to a cold ice age climate. At year 18,000 and counting our current interglacial vacation from the Ice Age is much nearer it's end than it's beginning.\n\nGlobal warming during Earth's current interglacial warm period has greatly altered our environment and the distribution and diversity of all life. For example:\n\n\n Approximately 15,000 years ago the earth had warmed sufficiently to halt the advance of glaciers, and sea levels worldwide began to rise.\n\n By 8,000 years ago the land bridge across the Bearing Strait was drowned, cutting off the migration of men and animals to North America.\n\n Since the end of the Ice Age, Earth's temperature has risen approximately 16 degrees F and sea levels have risen a total of 300 feet ! Forests have returned where once there was only ice.\n\nDuring ice ages our planet is cold, dry, and inhospitable-- supporting few forests but plenty of glaciers and deserts. Like a spread of collosal bulldozers, glaciers have scraped and pulverized vast stretches of Earth's surface and completely destroyed entire regional ecosystems not once, but several times. During Ice Ages winters were longer and more severe and ice sheets grew to tremendous size, accumulating to thicknesses of up to 8,000 feet!. They moved slowly from higher elevations to lower-- driven by gravity and their tremendous weight. They left in their wake altered river courses, flattened landscapes, and along the margins of their farthest advance, great piles of glacial debris.\n\nDuring the last 3 million years glaciers have at one time or another covered about 29% of Earth's land surface or about 17.14 million square miles (44.38 million sq. km.) . What did not lay beneath ice was a largely cold and desolate desert landscape, due in large part to the colder, less-humid atmospheric conditions that prevailed.\n\nDuring the Ice Age summers were short and winters were brutal. Animal life and especially plant life had a very tough time of it. Thanks to global warming, that has all now changed, at least temporarily.\n\nThje maximum CO2 level was 2% over 2.5 million yrs back, at least scientists say that!!