Glaciers in the Greenhouse: Polar Ice Might Have Little to do with Global Warming
January 13, 2008 9:44 AM
comment(s) - last by
Researchers at Scripps find evidence that glaciers are tougher than we might think
Global warming has been the hotly debated harbinger of the apocalypse in recent years. Rising ocean levels may put cities or perhaps
under salty ocean water while violent storms fueled by an over-warmed atmosphere wrack dry land.
Doom and gloom aside, one naturally occurring effect of raising ocean temperatures is the shrinking of polar ice caps and glaciers. The frozen water returning to the ocean contributes to climbing sea levels and should they disappear into the brine, could probably put most of the eastern seaboard under a pleasant warm ocean surf.
Or maybe they won't. Recently published data from a study done at Scripps Institute of Oceanography at the University of California, San Diego indicates that there may have been glacial growth even during one of the strongest climate warmings in Earth's history, known as the Cretaceous Thermal Maximum.
"Until now it was generally accepted that there were no large glaciers on the poles prior to the development of the Antarctic ice sheet about 33 million years ago. This study demonstrates that even the super-warm climates of the Cretaceous Thermal Maximum were not warm enough to prevent ice growth," explains Richard Norris, professor of paleobiology at Scripps and co-author of the study, titled "
Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse
." The study is published in the most recent issue of
The researchers used two independent methods to harvest the data on which they base their claim. Both studies used microfossils from the Cretaceous period and examined them for telltale signs of glacial melt. In one test, the researchers used ocean surface dwelling microfossils and subtracted the ocean surface temperature record from the stable isotope record found in the fossils.
The second method involved bottom-dwelling and near-surface microfossils known as foraminifera. Stable oxygen isotopes were measured in these tests and were found to support the theory of growing icecaps via changing ocean chemistry. Both tests support the conclusion, and fall in line with previous studies which show that sea level fell 25-40 meters at the same time as the ice sheets would have been growing during the Cretaceous.
The catalyst for glacial growth during such a hot period is still a mystery, but some suggestions found in the study are that unusually cool summers could have fostered growth in the mountains of the current Antarctic ice cap, or that increased moisture in the air from the greenhouse affect could have increased winter snowfall in high latitudes and elevations.
This article is over a month old, voting and posting comments is disabled
RE: Good news
1/15/2008 12:00:41 PM
> "Animals do fight for dominance. But its part of their survival."
Dominance displays aren't required for their survival. They're a behavior which has evolved as a competitive advantage....the same reason it exists in humans.
> "Which animals?"
Ah, an urban dweller, eh? Most carnivores will kill for sport. That includes all the big cats (including many housecats), some wolves and dogs, many marine species including killer whales, etc.
RE: Good news
1/15/2008 8:29:46 PM
Many animals kill each other for some rudimentary justice as well. Dolphins, big cats, wolves...
"This week I got an iPhone. This weekend I got four chargers so I can keep it charged everywhere I go and a land line so I can actually make phone calls." -- Facebook CEO Mark Zuckerberg
Florida County Brings Divorce Online
November 14, 2007, 10:02 AM
Latest By Levi Beckerson
Of Turbines Large And Small
May 24, 2011, 9:07 AM
Various Alcohols Shown To Make Various Improvements on Specific Superconductor
January 11, 2011, 8:32 AM
Genetics and Taste Buds; Can Science Build Better Chocolate?
December 27, 2010, 9:01 AM
New UMass Technique Seeks to Replace Petroleum for Industrial Chemicals
November 26, 2010, 7:26 AM
New MIT Nanotech Fights Cancer Naturally
September 20, 2010, 8:30 AM
Genetic Modification Turns Killers Into Saviors
September 16, 2010, 1:13 PM
New Rensselaer Nanocomposite Kills Staph
August 17, 2010, 8:10 AM
Researchers Create Nanoscale Particles For Ultrasound Applications
August 16, 2010, 3:44 PM
NCSU Study To Help Understand Nanoparticles Inside the Body
August 16, 2010, 8:38 AM
New Lithium Metal Phosphate Batteries Made With Wax and Soap
August 13, 2010, 1:10 PM
Star Wars Spinoff Film "Rogue One", Theme Park Attractions Announced
August 17, 2015, 12:20 PM
SpaceX Falcon 9's Seventh Supply Mission to ISS Ends w/ Fiery Stage 1 Explosion
June 28, 2015, 1:10 PM
Cool Science Video: Glowing Millipede Prowls the Nevada Desert
May 18, 2015, 12:00 PM
Newly Discovered Costa Rican Glass Frog is Kermit's Doppelgänger
April 22, 2015, 11:26 AM
Researchers Hope to Find "Exotic" Lifeforms Inside Crater of Dinosaur Killing Meteor
April 14, 2015, 8:47 PM
Mathematician's Sociological Formulation May Explain the "Hipster Paradox"
April 14, 2015, 1:13 PM
Most Popular Articles
Worth the Wait? Microsoft Teases at Windows 10 Flagship Phones to Air Oct. 6
September 15, 2015, 5:13 PM
Apple's First Fixes to iOS 9 Land w/ iOS 9.0.1 Release
September 23, 2015, 6:11 PM
Breaking Bad: How to Crash Google's Chrome Browser With Just 8 Characters
September 23, 2015, 11:08 AM
Apple Watch Commands 2 in 3 Smart Watch Sales, WatchOS 2 Sweetens the Pitch
September 20, 2015, 6:07 PM
Fakebook Pt. I: From "The Chive" to "AskMen"; How Facebook's Phonies are Born and Used
September 15, 2015, 4:00 AM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2015 DailyTech LLC. -
Terms, Conditions & Privacy Information