Posts Tagged ‘Ice Age’
Oxygen levels fell in Ice Age oceans
MCGILL (CAN) — Data from the end of the last Ice Age confirm that a changing climate lowers the amount of oxygen in the water. Continue…
Friday, December 23, 2011 10:49 - 0 Comments
Science & Technology - Nov 7, 2011 11:16 - 1 Comment
No single cause for Ice Age extinctions
TEXAS A&M (US) —Neither climate change nor humans alone can account for the Ice Age mass extinctions, according to a new international study. (more…)
Earth & Environment - Jun 22, 2011 12:00 - 0 Comments
Salt marshes predict sea level rise
PENN STATE (US) — Scientists are using a 2,000-year history to refine models used to gauge climate-change induced sea level rise, which, during the past century, rose at a faster rate than ever before. (more…)
Earth & Environment - Jan 28, 2011 11:35 - 0 Comments
Fossils link cooler ocean to extinction
CALTECH (US) — New evidence supports the idea that a mass extinction 450 million years ago was linked to a cooling climate. (more…)
Earth & Environment - Jan 14, 2011 14:53 - 0 Comments
Big chill from shift in ocean circulation
CARDIFF U (UK) — Researchers studying ocean sediment cores have found evidence that past changes in ocean circulation may have been more dramatic than previously thought. (more…)
Earth & Environment - Aug 26, 2010 15:42 - 0 Comments
Last ice age finished with a fizz
RUTGERS (US)—Imagine the Earth like an uncapped soda, fizzing and foaming and then returning to normal. Researchers have found evidence that a grand fizz of sorts took place over a 1,000 year period after the end of the last ice age. (more…)
Earth & Environment - Jun 24, 2010 15:11 - 2 Comments
Could melting ice cause a cold snap?
TULANE (US)—Earth was just coming out of an ice age 9,300 years ago when a cataclysmic event occurred that plunged the planet into a cold “snap” that lasted for centuries. (more…)
Earth & Environment - Jun 21, 2010 17:15 - 2 Comments
Is CO2 the missing link to past climate shifts?
BROWN (US)—By analyzing ocean sediment cores, researchers have concluded that carbon dioxide has played the lead role in dictating global climate patterns, beginning with the Ice Ages and continuing today. (more…)
Earth & Environment - May 4, 2010 7:50 - 3 Comments
Carbon cycle snowballed out of control
PRINCETON (US)—New evidence uncovered by a team of geologists suggests that an episode 720 million years ago called “snowball Earth,” which may have covered the continents and oceans in a thick sheet of ice, produced a dramatic change in the carbon cycle. (more…)
Earth & Environment - Apr 7, 2010 9:40 - 0 Comments
Ice sheet melt triggered ancient Big Freeze
U. SHEFFIELD (UK)—The main cause of a rapid global cooling period, known as the Big Freeze or Younger Dryas, that occurred nearly 13,000 years ago was a mega-flood path across North America which channeled melt-water from a giant ice sheet into the oceans triggering the cold snap. (more…)
Earth & Environment - Feb 15, 2010 12:18 - 2 Comments
Shifting debate on sea level models
U. IOWA (US)—New findings about the close link between changes in sea level and Earth’s climate challenge theories about the rates of ice accumulation and melting during the Quaternary Period—the time interval ranging from 2.6 million years ago to the present. (more…)
Earth & Environment - Sep 1, 2009 6:00 - 0 Comments
Icy mile leads to climate future
The international North Greenland Eemian Ice Drilling, or NEEM, project begun in 2009 to retrieve deep ice cores from the Earth’s Eemian warm period 120,000 years ago. Atmospheric gases trapped in the ancient ice are expected to help scientists better assess the risks of abrupt climate change as Earth warms in the future. (Courtesy: NEEM Ice Core Drilling Project)
Earth & Environment - Aug 6, 2009 4:00 - 0 Comments
Drilling deep to take Earth’s temperature
“We now also know that, although the beginning of ice ages (in the Northern Hemisphere) is linked to greenhouse gases, the change in intensity is related to how ice sheets grow and decay,” says Sindia Sosdian (left in helmet), seen above working with core samples on an earlier expedition.
Science & Technology - May 18, 2009 15:27 - 0 Comments
Ice Age sloth bone unearthed in Iowa
U. IOWA (US)—Researchers excavating a site in southwestern Iowa have discovered a bone from a type of giant Ice Age sloth never before recorded in the state. (more…)
