Quantcast

Latest Ice ages Stories

21d7b19d9dac3c1d45e78c6dfedeea731
2009-03-30 07:40:00

Dust trapped deep in Antarctic ice sheets is helping scientists unravel details of past climate change. Researchers have found that dust blown south to Antarctica from the windy plains of Patagonia "“ and deposited in the ice periodically over 80,000 years "“ provides vital information about glacier activity. Scientists hope the findings will help them to better understand how the global climate has changed during the past ice age, and so help predict environmental changes in the...

cbe67dbaeb21508ef49c844af53d2de71
2009-02-17 08:34:57

An article published in the prestigious science magazine Nature Geoscience yesterday shows that the period towards the end of the ice age was engraved by extreme and short-lived variations, which finally terminated the ice age. A group of scientists at the Bjerknes Centre for Climate Research and the University of Bergen in Norway, together with colleagues at ETH, Zrich, combined terrestrial and marine proxy palaeo-data covering the latest part of the ice age to improve our understanding of...

2009-02-11 12:13:55

U.S. scientists say they have found proof that Earth's sea level was more than 70 feet (21 meters) higher 400,000 years ago than it is now. Storrs Olson, a zoologist at the Smithsonian's National Museum of Natural History, and geologist Paul Hearty of the Bald Head Island Conservancy said they discovered sedimentary and fossil evidence in the walls of a limestone quarry in Bermuda that documents the rise in sea level during an interglacial period of the Middle Pleistocene. Although Hearty and...

359149a3bd565a5edbfa8a81fec59d001
2009-01-12 08:10:00

Scientists are now making an alarming claim that the earth is on the brink of entering another Ice Age that could last the next 100,000 years. They believe a 12,000-year warming period is currently winding down. They say ice cores, ocean sediment cores, the geologic record, and studies of ancient plant and animal populations all demonstrate a regular cyclic pattern of Ice Age patterns, separated by intervening warm interglacials, each lasting about 12,000 years. Experts point out that most...

2008-12-18 15:43:47

The common wisdom is that the invention of the steam engine and the advent of the coal-fueled industrial age marked the beginning of human influence on global climate. But gathering physical evidence, backed by powerful simulations on the world's most advanced computer climate models, is reshaping that view and lending strong support to the radical idea that human-induced climate change began not 200 years ago, but thousands of years ago with the onset of large-scale agriculture in Asia and...

088bc64f5cd55d1acf435bbba105188a1
2008-11-07 14:35:00

A study reported in yesterday's issue of Nature disputes a longstanding picture of how ice sheets influence ocean circulation during glacial periods. The distribution of sunlight, rather than the size of North American ice sheets, is the key variable in changes in the North Atlantic deep-water formation during the last four glacial cycles, according to the article. The new study goes back 425,000 years, according to Lorraine Lisiecki, first author and assistant professor in the Department of...

a8701d5f56017b3f037653a80481ba9b1
2008-07-24 14:10:00

A single typhoon in Taiwan buries as much carbon in the ocean -- in the form of sediment -- as all the other rains in that country all year long combined. That's the finding of an Ohio State University study published in a recent issue of the journal Geology. The study -- the first ever to examine the chemistry of stream water and sediments that were being washed out to sea while a typhoon was happening at full force -- will help scientists develop better models of global climate change. Anne...

b02de33b5268c47fc69be7a35f60c6031
2008-05-28 19:50:00

Parallel to catastrophic event of 635 million years ago An abrupt release of methane, a powerful greenhouse gas, from ice sheets that extended to Earth's low latitudes some 635 million years ago caused a dramatic shift in climate, scientists funded by the National Science Foundation (NSF) report in this week's issue of the journal Nature. The shift triggered events that resulted in global warming and an ending of the last "snowball" ice age. The researchers believe that the methane was...

9cae9dc620ee0699b9912b7c74fdf9091
2008-02-15 12:05:00

Frozen in time"¦ frozen in place"¦ frozen solid"¦ All of these phrases have been used to describe Antarctica, and yet they all belie the truth about this southerly point on the globe. Although the area is covered in ice and bears witness to some of the most extreme cold on the planet, this ecosystem is dynamic, not static, and change here has always been dramatic and intense. A report published in the March issue of Ecology argues that the extreme cold and environmental...

e1e22c59040bd0071ea6d34287ee722d1
2007-03-24 13:41:12

Greenland is cold and hot. It's a deep freezer storing 10 percent of Earth's ice and a subject of fevered debate. If something should melt all that ice, global sea level could rise as much as 7 meters (23 feet). Greenland and Antarctica - Earth's two biggest icehouses - are important indicators of climate change and a high priority for research, as highlighted by the newly inaugurated International Polar Year. Just a few years ago, the world's climate scientists predicted that Greenland...


Word of the Day
humgruffin
  • A terrible or repulsive person.
Regarding the etymology of 'humgruffin,' the OED says (rather unhelpfully) that it's a 'made-up word.' We might guess that 'hum' comes from 'humbug' or possibly 'hum' meaning 'a disagreeable smell,' while 'gruffin' could be a combination of 'gruff' and 'griffin.'