he said: ‘we have had five warming cycles since about 900ad, each followed by a dramatic cooling cycle.’
he said: ‘we have had five warming cycles since about 900ad, each followed by a dramatic cooling cycle.’
little ice age:118
in the north atlantic, sediments accumulated since the end of the last ice age, nearly 12,000 years ago, show regular increases in the amount of coarse sediment grains deposited from icebergs melting in the now open ocean, indicating a series of 1–2 °c (2–4 °f) cooling events recurring every 1,500 years or so.