B
bratzangel100
Guest
I do not know the answer this question?
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T
teracer18
Guest
When Al Gore farts and the gas hits the sun light it ignites and causes Global Warming.
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deanpem1986uk
Guest
The tendency of climate to change very suddenly (often in just a few decades) and then reverse has been one of the most surprising lessons of recent study of the last 130,000 years, and its implications for biogeography and for the evolution of human cultures and biology have barely begun to be considered. Sudden stepwise instability is also a disturbing scenario to be borne in mind when considering the effects that humans might have on the climate system through adding greenhouse gases. Judging by what we see from the past, conditions might gradually be building up to a 'break point' at which a sudden dramatic change in the climate system will occur over just a decade or two.
Sudden transitions after 115,000 years ago:
The Eemian interglacial seems to have ended in a sudden cooling event about 110,000 years ago, recorded from Ice cores, ocean sediment cores and pollen records from across Eurasia. Following the end of the Eemian, a large number of other sudden changes and short-lived warm and cold events have been documented. These are most prominent in the ice-core record of Greenland and the pollen records of Europe, suggesting that they were most intense in the North Atlantic region.
A new detailed study of two Greenland ice cores (GRIP and GISP2), just published in Science (Taylor et al. 1997), suggests that the main Younger Dryas-to-Holocene warming (about 11,000 years ago) took several decades in the Arctic, but was marked by a series of sudden steps in warming, each taking less than 5 years. About half of the warming was concentrated into a single period of less than 15 years. A rapid global rise in methane production at the same time suggests that the warming and moistening of climate (causing more methane output from swamps and other biotic sources) was a globally synchronized change, with the water vapor content of the atmosphere as the most likely 'messenger' in this transition, by virtue of its effect as a greenhouse gas (see below). The detailed chronology of different environmental indicators suggests that changes in lower latitude temperature and dust flux from the continents preceded the
change in Greenland temperatures that relates closely to the northern thermohaline circulation. According to the Greenland ice-cores, conditions remained slightly cooler than present for a while; 'normal' Holocene warmth may not have been attained immediately however, instead taking a further 1500 years (up until around 10,000 calendar years ago) before it was reached.
It is not yet clear if the general pattern of the transition between the Younger Dryas and Holocene is representative of other rapid warming and cooling events in the past 110,000 years. Not all of these events have been studied in such detail as the Younger Dryas, but those transitions which have been well studied using high-resolution records seem to have occurred over only a few decades. The Younger Dryas is probably a time of human extinction, especially in Europe. It marks the end of the High Paleolithic (Cro-Magnon/Magdalenian culture). It is likely that much of Europe became largely depopulated during this time, with people still surviving primarily in coastal areas, where the ocean was a moderating influence.
Sudden transitions after 115,000 years ago:
The Eemian interglacial seems to have ended in a sudden cooling event about 110,000 years ago, recorded from Ice cores, ocean sediment cores and pollen records from across Eurasia. Following the end of the Eemian, a large number of other sudden changes and short-lived warm and cold events have been documented. These are most prominent in the ice-core record of Greenland and the pollen records of Europe, suggesting that they were most intense in the North Atlantic region.
A new detailed study of two Greenland ice cores (GRIP and GISP2), just published in Science (Taylor et al. 1997), suggests that the main Younger Dryas-to-Holocene warming (about 11,000 years ago) took several decades in the Arctic, but was marked by a series of sudden steps in warming, each taking less than 5 years. About half of the warming was concentrated into a single period of less than 15 years. A rapid global rise in methane production at the same time suggests that the warming and moistening of climate (causing more methane output from swamps and other biotic sources) was a globally synchronized change, with the water vapor content of the atmosphere as the most likely 'messenger' in this transition, by virtue of its effect as a greenhouse gas (see below). The detailed chronology of different environmental indicators suggests that changes in lower latitude temperature and dust flux from the continents preceded the
change in Greenland temperatures that relates closely to the northern thermohaline circulation. According to the Greenland ice-cores, conditions remained slightly cooler than present for a while; 'normal' Holocene warmth may not have been attained immediately however, instead taking a further 1500 years (up until around 10,000 calendar years ago) before it was reached.
It is not yet clear if the general pattern of the transition between the Younger Dryas and Holocene is representative of other rapid warming and cooling events in the past 110,000 years. Not all of these events have been studied in such detail as the Younger Dryas, but those transitions which have been well studied using high-resolution records seem to have occurred over only a few decades. The Younger Dryas is probably a time of human extinction, especially in Europe. It marks the end of the High Paleolithic (Cro-Magnon/Magdalenian culture). It is likely that much of Europe became largely depopulated during this time, with people still surviving primarily in coastal areas, where the ocean was a moderating influence.
E
elva
Guest
Long terms: Global warming. However, for a short term climate changes it involves the movement of wind, clouds, and heat. If you are taliking about seasonally, it depens on how much co2 plants absorbe and that can reduce temperature b/c less heat is trapped in our atmosphere.
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Mike M
Guest
Just adding to Deanpem's answer (which by the way should get your tick of approval) it is feared that our slow build up to a tipping point could see the mass release of methane from the ocean floor where it is currently stored in a frozen state called clathrates. If these clathrates suddenly thaw the amount of methane released could be enough to wipe out a large amount of animal life, similar to the end Permian event which saw 90% of all life made extinct.