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Global cooling through volcanism is the sum of the influence of the global dimming and the influence of the high albedo of the deposited ash layer. [108] The lower snow line and its higher albedo might prolong this cooling period. [ 109 ]
Last Glacial Period, not to be confused with the Last Glacial Maximum or Late Glacial Maximum below. (The following events also fall into this period.) 48,000–28,000: Mousterian Pluvial wet in North Africa 26,500–19,000: Last Glacial Maximum, what is often meant in popular usage by "Last Ice Age" 16,000–13,000
From c. 200 to c. 290 there was a period of cooling, which affected the northwestern provinces of the Empire. [3] Dendrochronology indicates that severe drought which began in 338 and persisted until 377 forced the nomadic pastoral federation of Huns to seek pastures and predation farther to the west and south. [ 3 ]
The most recent cooling event was the Little Ice Age. The same cooling events are detected in sediments accumulating off Africa, but the cooling events appear to be larger: 3–8 °C (6–14 °F). [75] δ 18 O values from chironomid remains in the Azores reflect the cooling of the LIA. [76]
The Late Antique Little Ice Age is seen between the middle of the 6th century and the start of the 7th century, and preceded by the Roman Warm Period. [1]The Late Antique Little Ice Age (LALIA) was a long-lasting Northern Hemispheric cooling period in the 6th and 7th centuries AD, during the period known as Late Antiquity.
The cooling period is reproduced by current (1999 on) global climate models that include the physical effects of sulfate aerosols, and there is now general agreement that aerosol effects were the dominant cause of the mid-20th century cooling. At the time there were two physical mechanisms that were most frequently advanced to cause cooling ...
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The cooling trend continued in the Miocene, with relatively short warmer periods. When South America became attached to North America creating the Isthmus of Panama around 2.8 million years ago , the Arctic region cooled due to the strengthening of the Humboldt and Gulf Stream currents, [ 35 ] eventually leading to the glaciations of the ...