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From Wikipedia on "Ice Age":
In between ice ages, there are multi-million year periods of more temperate, almost tropical, climate, but also within the ice ages (or at least within the last one), temperate and severe periods occur. The colder periods are called 'glacial periods', the warmer periods 'interglacials', such as the Eemian interglacial era.
The Earth is in an interglacial period now, the last retreat ending about 10,000 years ago. There appears to be a conventional wisdom that "the typical interglacial period lasts ~12,000 years" but this is hard to substantiate from the evidence of ice core records. For example, an article in Nature[3] argues that the current interglacial might be most analogous to a previous interglacial that lasted 28,000 years.
Based on predicted changes in orbital forcing, in the absence of human influence, the current interglacial may be expected to last 50,000 years: see Milankovitch cycles. There is no evidence that anthropogenic forcing from increased "greenhouse gases" outweighs orbital forcing, and the prediction for the next few hundred years is for temperature rises: see global warming regardless of man's activities.
In between ice ages, there are multi-million year periods of more temperate, almost tropical, climate, but also within the ice ages (or at least within the last one), temperate and severe periods occur. The colder periods are called 'glacial periods', the warmer periods 'interglacials', such as the Eemian interglacial era.
The Earth is in an interglacial period now, the last retreat ending about 10,000 years ago. There appears to be a conventional wisdom that "the typical interglacial period lasts ~12,000 years" but this is hard to substantiate from the evidence of ice core records. For example, an article in Nature[3] argues that the current interglacial might be most analogous to a previous interglacial that lasted 28,000 years.
Based on predicted changes in orbital forcing, in the absence of human influence, the current interglacial may be expected to last 50,000 years: see Milankovitch cycles. There is no evidence that anthropogenic forcing from increased "greenhouse gases" outweighs orbital forcing, and the prediction for the next few hundred years is for temperature rises: see global warming regardless of man's activities.