What period has had best climates?
Sept 1, 2024 14:37:50 GMT -5
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Post by massiveshibe on Sept 1, 2024 14:37:50 GMT -5
The Holocene is the current interglacial period that started 12 thousand years ago, characterized by small ice sheets and an average global temperature of 14C with small fulctuations (15C during the early holocene and 13C during the Maunder Minimum)
The Pleistocene is a period lasting from 2.5 million years ago until 12 thousand years ago. This period is characterized by long glacial periods and short interglacials strongly influenced by Milankovitch cycles. Glacial periods were cold ages when the ice sheets significantly expanded to lower latitudes, whilst interglacials are short periods of slightly less cold conditions and smaller ice sheets, much like present day. Average global temperature varied between 6C to 12C during glacials and 12C to 16C during interglacials.
The Neogene is the period that preceeded the current Quartenary Period which both the Holocene and Pleistocene are in. It was slightly warmer than today with an average global temperature of 18C, although it dropped to 16C during the end of it as the Antarctican ice sheet formed and the current Late Cenozoic glaciation began. Much like the Quartenary, there were both glacials and interglacials, although they were much warmer, with the average Neogene glacial periods being as warm as Quartenary interglacials.
The Paleogene is the first period of the current Cenozoid Era. The Earth was ice free at the time as there was no permanent ice, since all the snow that fell in the high latitudes during the winter would melt during summer. Average global temperature was 22C.
The Cretaceous preceeded the Paleogene period and the Cenozic era. It is the last period of the Mesozoic era and it's the last period which dinosaurs roamed the Earth. Like the Paleogene, the Earth was ice free and the average global temperature hovered between 21C and 23C
The Jurassic is a famous period preceeding the Cretaceous known for Pangea and its dinousaurs. Average global temperature was 18C to 20C and there might have been a short glaciation at some point during the middle of this period.
The Triassic preceeded the Jurassic. This period began with the worst mass extinction ever, which was caused by scorching temperatures with the average global temperature being 32C at the time. Equatorial Pangea was too hot and dry for plant life and the Earth cells likely worked differently. Then during the late Triassic, the Earth began to cool down and the abundant water vapour in the atmosphere began to condense and fall as rain, causing the Carnian Pluvial Event where it rained nonstop, everywhere for 2 million years.
The Permian and Carboniferous periods were much like today in terms of climate, with polar ice sheets and lush tropics, rather than polar rainforests and barren tropical deserts like in the Triassic. Global temperatures varied a lot. changing between 10C and 18C.
The Devonian was much like the early Triassic, devoid of permanent ice at the poles, although slightly cooler and the average global temperatures varying between 24C and 28C.
As for the Silurian, Ordovician and Cambrian, they varied a lot and it would take too long for me to describe them cliamtically.
The Pleistocene is a period lasting from 2.5 million years ago until 12 thousand years ago. This period is characterized by long glacial periods and short interglacials strongly influenced by Milankovitch cycles. Glacial periods were cold ages when the ice sheets significantly expanded to lower latitudes, whilst interglacials are short periods of slightly less cold conditions and smaller ice sheets, much like present day. Average global temperature varied between 6C to 12C during glacials and 12C to 16C during interglacials.
The Neogene is the period that preceeded the current Quartenary Period which both the Holocene and Pleistocene are in. It was slightly warmer than today with an average global temperature of 18C, although it dropped to 16C during the end of it as the Antarctican ice sheet formed and the current Late Cenozoic glaciation began. Much like the Quartenary, there were both glacials and interglacials, although they were much warmer, with the average Neogene glacial periods being as warm as Quartenary interglacials.
The Paleogene is the first period of the current Cenozoid Era. The Earth was ice free at the time as there was no permanent ice, since all the snow that fell in the high latitudes during the winter would melt during summer. Average global temperature was 22C.
The Cretaceous preceeded the Paleogene period and the Cenozic era. It is the last period of the Mesozoic era and it's the last period which dinosaurs roamed the Earth. Like the Paleogene, the Earth was ice free and the average global temperature hovered between 21C and 23C
The Jurassic is a famous period preceeding the Cretaceous known for Pangea and its dinousaurs. Average global temperature was 18C to 20C and there might have been a short glaciation at some point during the middle of this period.
The Triassic preceeded the Jurassic. This period began with the worst mass extinction ever, which was caused by scorching temperatures with the average global temperature being 32C at the time. Equatorial Pangea was too hot and dry for plant life and the Earth cells likely worked differently. Then during the late Triassic, the Earth began to cool down and the abundant water vapour in the atmosphere began to condense and fall as rain, causing the Carnian Pluvial Event where it rained nonstop, everywhere for 2 million years.
The Permian and Carboniferous periods were much like today in terms of climate, with polar ice sheets and lush tropics, rather than polar rainforests and barren tropical deserts like in the Triassic. Global temperatures varied a lot. changing between 10C and 18C.
The Devonian was much like the early Triassic, devoid of permanent ice at the poles, although slightly cooler and the average global temperatures varying between 24C and 28C.
As for the Silurian, Ordovician and Cambrian, they varied a lot and it would take too long for me to describe them cliamtically.
