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4th millennium BC - Cultures | | 4th millennium BC - Cultures: Encyclopedia II - 4th millennium BC - Cultures | |
4th millennium BC - Environmental changes.
Based on studies by glaciologist Lonnie Thompson (professor at Ohio State University and researcher with the Byrd Polar Research Center) [1] a number of indicators shows there were a global change in climate 5,200 years ago:
The climate was altered suddenly with severe impacts.
Plants buried in the Quelccaya ice cap in the Peruvian Andes demonstrate the climate had shifted suddenly and severely to capture the plants and preserve them until now. ...
See also:4th millennium BC, 4th millennium BC - Events, 4th millennium BC - Cultures, 4th millennium BC - Environmental changes, 4th millennium BC - Significant persons, 4th millennium BC - Inventions discoveries introductions, 4th millennium BC - Centuries, 4th millennium BC - External references | | | 4th millennium BC, 4th millennium BC - Centuries, 4th millennium BC - Cultures, 4th millennium BC - Environmental changes, 4th millennium BC - Events, 4th millennium BC - External references, 4th millennium BC - Inventions discoveries introductions, 4th millennium BC - Significant persons | | |
| | | 4th millennium BC: Encyclopedia II - 4th millennium BC - Cultures
4th millennium BC - Cultures
- Indian Subcontinent
- Mesopotamia in Asia
- Neolithic Europe
- Yamna
- Vinca culture
- Minoan civilization
- Egypt in Africa
- Naqada culture on the Nile
4th millennium BC - Environmental changes
Based on studies by glaciologist Lonnie Thompson (professor at Ohio State University and researcher with the Byrd Polar Research Center) [1] a number of indicators shows there were a global change in climate 5,200 years ago:
- The climate was altered suddenly with severe impacts.
- Plants buried in the Quelccaya ice cap in the Peruvian Andes demonstrate the climate had shifted suddenly and severely to capture the plants and preserve them until now.
- A man trapped in an Alpine glacier ("Oetzi") is frozen until his discovery in 1991.
- Tree rings from Ireland and England show this was their driest period.
- Ice core records showing the ratio of two oxygen isotopes retrieved from the ice fields atop Africa’s Mount Kilimanjaro, a proxy for atmospheric temperature at the time snow fell.
- Major changes in plant pollen uncovered from lakebed cores in South America.
- Record lowest levels of methane retrieved from ice cores from Greenland and Antarctica.
- Beginning of desertification of Sahara (35th century BC). The shift by the Sahara Desert from a habitable region to a barren desert.
Other related archives18 February, 1991, 25 September, 3114 BC, 31st century BC, 32nd century BC, 3300 BC, 33rd century BC, 34th century BC, 35th century BC, 36th century BC, 37th century BC, 38th century BC, 39th century BC, 3rd millennium BC, 40th century BC, 4th millennium BC, 5th millennium BC, 7 October, Africa, Antarctica, Asia, August 11, August 13, Austria, Bronze, Bronze Age, Byrd Polar Research Center, Copper, Creation, Crete, Céide Fields, Dams, Drainage, Early Dynastic Period, Earth, Egypt, Egyptian pyramids, England, Epoch, Greenland, Hebrew Calendar, Hindu mythology, Hsekiu, India, Indian Subcontinent, Ireland, Italy, Kali Yuga, Krishna, Kurgan, Long Count, Lower Egypt, March 29, Mastabas, Maya calendar, Maykop, Maykop culture, Mehrgarh, Memphis, Menes, Mesopotamia, Middle East, Millennia, Minoan civilization, Mount Kilimanjaro, Naqada, Narmer, Neolithic Europe, New Stone Age, Newgrange, Nile, Oetzi, Ohio State University, Orkney Islands, Potter's wheel, Proto-Elamite, Proto-Indo-Europeans, Ro, Russia, Sahara, Sails, Scotland, Serket, Skara Brae, Sredny Stog culture, Stonehenge, Sumer, Sumerian, Sumerians, Susa, Sweet Track, Thesh, Tiu, Ukraine, Upper, Ur, Uruk, Vinca culture, Wazner, Yamna, astrology, astronomy, canals, chariot, civil law, cuneiform, glacier, horse, hydrology, inclined plane, lever, mathematics, methane, observatory, other millennia, pharaohs, potter's wheel, roadway, sailboat, sewage, silver, urbanisation, wheel, writing, writings, Ötzi the Iceman, Ötztal Alps
 Adapted from the Wikipedia article "Cultures", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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