Navigation Links
Ancient Hawaiian glaciers reveal clues to global climate impacts
Date:8/5/2010

CORVALLIS, Ore. Boulders deposited by an ancient glacier that once covered the summit of Mauna Kea on the island of Hawaii have provided more evidence of the extraordinary power and reach of global change, particularly the slowdown of a North Atlantic Ocean current system that could happen again and continues to be a concern to climate scientists.

A new study has found geochemical clues near the summit of Mauna Kea that tell a story of ancient glacier formation, the influence of the most recent ice age, more frequent major storms in Hawaii, and the impact of a distant climatic event that changed much of the world.

The research was published in Earth and Planetary Science Letters by scientists from Oregon State University, the Woods Hole Oceanographic Institution, University of British Columbia and U.S. Geological Survey. The work was supported by the National Science Foundation.

"Mauna Kea had a large glacial ice cap of about 70 square kilometers until 14,500 years ago, which has now all disappeared," said Peter Clark, a professor of geosciences at OSU. "We've been able to use new data to determine specifically when, where and most likely why the glacier existed and then disappeared."

Mauna Kea, at 13,803 feet above sea level, is in a sense the tallest mountain in the world because it rises 30,000 feet from the sea floor. Dormant for thousands of years, it once featured a large glacier on its massive peak at the height of the last ice age about 21,000 years ago. As the ice age ended and the global climate warmed, the glacier began to disappear.

However, the new research found that the glacier on Mauna Kea began to re-advance to almost its ice age size about 15,400 years ago. That coincides almost exactly with a major slowdown of what scientists call the Atlantic meridional overturning circulation, or AMOC, in the North Atlantic Ocean.

The AMOC is part of a global ocean circulation system that car
'/>"/>

Contact: Peter Clark
clarkp@geo.oregonstate.edu
541-737-0787
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Genome of ancient sponge reveals origins of first animals, cancer
2. Ancient blob-like creature of the deep revealed by scientists
3. Epileptic seizures may be linked to an ancient gene family
4. Ancient DNA identifies donkey ancestors, people who domesticated them
5. UBC researcher discovers ancient stress hormone in pre-historic fish
6. New research on rapidly disappearing ancient plant offers hope for species recovery
7. New research on rapidly-disappearing ancient plant offers hope for species recovery
8. Ancient birds from North America colonized the South
9. Man-made global warming started with ancient hunters
10. Scientists discover ancient viral invasion that shaped human genome
11. Revealing the ancient Chinese secret of sticky rice mortar
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/22/2014)... your child to behave at the dinner tablecut up their ... in Eating Behaviors , found that when 6-10 year ... front teeth such as drumsticks, whole apples, or corn on ... had been cut. "They were twice as likely to ... Brian Wansink, Professor and Director of the Cornell Food and ...
(Date:4/22/2014)... Lowe, interim director of the University of Montana,s Wildlife Biology ... Proceedings of the National Academy of Sciences on ... ... Geological Survey, the University of Washington, the Cary Institute of ... Service Northern Research Station examined 664 water samples collected every ...
(Date:4/22/2014)... the fist-like club of a mantis shrimp, a team ... collaboration with University of Southern California and Purdue University, ... is more impact resistant and tougher than the standard ... club of this tiny crustacean, the more we realize ... every day," said David Kisailus, a Kavli Fellow of ...
Breaking Biology News(10 mins):Biting vs. chewing 2New research focuses on streamwater chemistry, landscape variation 2Mantis shrimp stronger than airplanes 2Mantis shrimp stronger than airplanes 3
... If world leaders do not immediately engage in a race ... ecosystems will not survive the global warming and acidification predicted ... group of marine scientists from around the world in a ... 13., "It,s vital that the public understands that the lack ...
... at Stevens Institute of Technology, won first place at ... in November 2007. Freed was the first competitor from ... poster, Impedance Mammography, was based on a project she ... April 2007, the New Jersey Regional ISPE Poster Contest ...
... 20, 2007) -- At its core, healthy neurological function hinges ... the synapse. Figuring out how the synapse traffics this ... understanding the function of the healthy and diseased brain. ... Medical College in New York City has spotted a crucial ...
Cached Biology News:Major study concludes that global warming is killing off coral 2Katherine Freed wins first place at the International ISPE Undergraduate Poster Contest 2A key enzyme helps keep the synapse on track 2A key enzyme helps keep the synapse on track 3
(Date:1/14/2014)... The largest international professional organization of scientists ... derivatives thereof has endorsed an educational program that ... challenges of adulterated herb and botanical products. ... The Society for Medicinal Plant and Natural Product ...
(Date:1/14/2014)... iLab Solutions, the leader in core facility management software, ... Strategy. In this role, Michelle will work with current and ... the development of iLab products. Her main goal will be ... the scientific community by offering the most advanced, user-friendly, and ...
(Date:1/14/2014)... 14, 2014  RXi Pharmaceuticals Corporation (OTCQX: RXII), a ... innovative therapies addressing major unmet medical needs using ... Notice of Allowance from the United States Patent ... compounds (sd-rxRNA®), for the treatment of fibrosis. The ...
(Date:1/14/2014)...   Kinaxis ®, provider of RapidResponse ®, a cloud-based ... planning ( S&OP ) service, is proud to be a ... be held at the Hilton San Diego Bayfront, January 30 ... Elisabeth Kaszas , Director of Supply Chain at Amgen, as ...
Breaking Biology Technology:World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... , More sensitive than ... Linear quantitation of mRNA targets , over a 106-fold range ... as 500 fg total RNA 1/20th of a single cell! , Fast, ... 15 min , , ...
... Fluorescence activated cell sorting (FACS) is a , ... individual cells using fluorescent probes that bind specifically to ... commonly used to collect , cells of a given ... , Figure 1.Linear Amplification from 1-1000 Cells. , ...
... Remove >90% of mammalian RNA from , ... Simple procedure takes less than 2 hours , ... with , MICROB Express Bacterial mRNA Purification Kit ... bacterial RNA isolated from host cells , ...
Cached Biology Technology:HIGH SENSITIVITY qRT-PCR 2HIGH SENSITIVITY qRT-PCR 3HIGH SENSITIVITY qRT-PCR 4HIGH SENSITIVITY qRT-PCR 5Cells-to-cDNA II Using FACS Sorted Cells 2Bacterial RNA Isolation From Infected Eukaryotic Hosts 2Bacterial RNA Isolation From Infected Eukaryotic Hosts 3Bacterial RNA Isolation From Infected Eukaryotic Hosts 4Bacterial RNA Isolation From Infected Eukaryotic Hosts 5Bacterial RNA Isolation From Infected Eukaryotic Hosts 6
...
Experion HighSens chips are the microfluidic chips used to perform high-sensitivity RNA analysis (picogram levels) with the Experion automated electrophoresis system. Each chip has the capacity to ru...
... Second Mitochondria Derived Activator of ... 20 mM HEPES, pH 7.5 AVOID FREEZE/THAW CYCLES. ... Smac/DIABLO with a carboxy terminal His•Tag ® ... E. coli . Smac/DIABLO is released along with ...
... to Decorin ( Abpromise for ... Antigen: Synthetic peptide: IGPEVPDDRDFEPS conjugated ... 6-19 of Human Decorin (fragment 36-49 ... II). Entrez GeneID: ...
Biology Products: