www sciencedaily com releases 2014-04-140416143309 htm
TRANSCRIPT
pdfcrowd.comopen in browser PRO version Are you a developer? Try out the HTML to PDF API
Featured Research from universities, journals, and other organizations
Date:
Source:
Summary:
April 16, 2014
Dartmouth College
Changes in air temperature, not precipitation, drove the expansion andcontraction of glaciers in Africa's Rwenzori Mountains at the height ofthe last ice age, according to research. The results -- along with arecent study that found air temperature also likely influenced thefluctuating size of South America's Quelccaya Ice Cap over the pastmillennium -- support many scientists' suspicions that today's tropicalglaciers are rapidly shrinking primarily because of a warming climaterather than declining snowfall or other factors.
Share This
Related Topics
Air temperature influenced African glacial movements at height of lastice age
Save/Print: Share:
Breaking News:Upside-Down Planet: Studying Binary Star ...
Email to a friend
Google+
Print this page
More options
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins
Mobile: iPhone Android Web Follow: Facebook Twitter Google+ Subscribe: RSS Feeds Email Newsletters
HEALTH PHYSICAL/TECH ENVIRONMENT SearchEnter keyword or phrase ...QUIRKYSOCIETY/EDUCATION
Thin Film Coatingsarcnano.com
Deposition Services Over 100 Materials
pdfcrowd.comopen in browser PRO version Are you a developer? Try out the HTML to PDF API
Credit: © Dmitry Pichugin / Fotolia [Click to enlarge image]
C
Herd of antelopes in Uganda (stock image). Dartmouth glacial geomorphologistMeredith Kelly and her team used the beryllium-10 method to determine the agesof quartz-rich boulders atop moraines in the Rwenzori Mountains on the border ofUganda and the Democratic Republic of Congo. These mountains have the mostextensive glacial and moraine systems in Africa. Moraines are ridges of sedimentsthat mark the past positions of glaciers.
hanges in air temperature, not precipitation, drove the expansion andcontraction of glaciers in Africa's Rwenzori Mountains at the height ofthe last ice age, according to a Dartmouth-led study funded by the
National Geographic Society and the National Science Foundation.
The results -- along with a recent Dartmouth-led studythat found air temperature also likely influenced thefluctuating size of South America's Quelccaya Ice Capover the past millennium -- support many scientists'suspicions that today's tropical glaciers are rapidlyshrinking primarily because of a warming climaterather than declining snowfall or other factors. The twostudies will help scientists to understand the naturalvariability of past climate and to predict tropicalglaciers' response to future global warming.
The most recent study, which marks the first time that
Related Topics
Earth & Climate
Fossils & Ruins
Related Articles
Related Stories
More Accurate Method to DateTropical Glacier MorainesNov. 19, 2013 — Scientists havefound a more accurate method to
determine the ages of boulders deposited bytropical glaciers, findings that will likely influenceprevious research of how climate change hasimpacted ... full story
East Antarctic Ice Sheet CouldBe More Vulnerable to ClimateChange Than PreviouslyThoughtAug. 28, 2013 — The world's largest
ice sheet could be more vulnerable to the effects ofclimate change than previously thought, accordingto new ... full story
Scientists Find ExtensiveGlacial Retreat in MountEverest RegionMay 13, 2013 — Researchers taking
a new look at the snow and ice covering MountEverest and the national park that surrounds it arefinding abundant evidence that the world's tallestpeak is shedding its ... full story
Glaciers in Southwest China Feel theBrunt of Climate ChangeOct. 25, 2011 — Significant increases in annualtemperatures are having a devastating effect onglaciers in the mountainous regions of southwesternChina, potentially affecting natural habitats, tourismand wider ... full story
Spectacular Melting Of TheLargest French GlacierAug. 7, 2009 — Located over 12 000kilometers from the Alps, theKerguelen Islands are home to the
largest French glacier, the Cook ice cap (which had
Thin FilmCoatings
arcnano.com
Deposition ServicesOver 100 Materials
Ice Ages
Global Warming
Climate
Early Climate
Ancient DNA
Evolution
Ice sheet
Ice age
Greenland ice sheet
Global warming
Climate model
Paleoclimatology
pdfcrowd.comopen in browser PRO version Are you a developer? Try out the HTML to PDF API
MLA APA Chicago
Dartmouth College. "Air temperature influenced African glacial movements at heightof last ice age." ScienceDaily. ScienceDaily, 16 April 2014.<www.sciencedaily.com/releases/2014/04/140416143309.htm>.
Share This
scientists have used the beryllium-10 surface exposuredating method to chronicle the advance and retreat ofAfrica's glaciers, appears in the journal Geology. APDF is available on request.
Africa's glaciers, which occur atop the world's highesttropical mountains, are among the most sensitivecomponents of the world's frozen regions, but theclimatic controls that influence their fluctuations arenot fully understood. Dartmouth glacialgeomorphologist Meredith Kelly and her team used the beryllium-10 method todetermine the ages of quartz-rich boulders atop moraines in the Rwenzori Mountainson the border of Uganda and the Democratic Republic of Congo. These mountainshave the most extensive glacial and moraine systems in Africa. Moraines are ridges ofsediments that mark the past positions of glaciers.
The results indicate that glaciers in equatorial East Africa advanced between 24,000and 20,000 years ago at the coldest time of the world's last ice age. A comparison ofthe moraine ages with nearby climate records indicates that Rwenzori glaciersexpanded contemporaneously with regionally dry, cold conditions and retreated whenair temperature increased. The results suggest that, on millennial time scales, pastfluctuations of Rwenzori glaciers were strongly influenced by air temperature.
Story Source:
The above story is based on materials provided by Dartmouth College. Note:Materials may be edited for content and length.
Journal Reference:
1. J. S. Stroup, M. A. Kelly, T. V. Lowell, P. J. Applegate, J. A. Howley. LateHolocene fluctuations of Qori Kalis outlet glacier, Quelccaya Ice Cap,Peruvian Andes. Geology, 2014; 42 (4): 347 DOI: 10.1130/G35245.1
Cite This Page:
Trending Topics
largest French glacier, the Cook ice cap (which hadan area of around 500 km2 in 1963). By combininghistorical ... full story
from the past week
Plants & Animals
Earth & Climate
more related stories
Cell Biology
Food
Genetics
Mating andBreeding
Pests and Parasites
Botany
Molecular Biology
Endangered Plants
Forest
pdfcrowd.comopen in browser PRO version Are you a developer? Try out the HTML to PDF API
More Earth & Climate News Tuesday, April 22, 2014
Featured Research from universities, journals, and other organizations
Featured Videos from AP, Reuters, AFP, and other news services
Share This Thin Film Coatingsarcnano.com
Deposition Services Over 100 Materials
newer top stories | older top stories
In Other News
Fossils & Ruins
... from NewsDaily.com
Science News
Health News
Email to a friend
Google+
Print this page
More options
Today's Antarctic RegionOnce as Hot as California,FloridaApr. 21, 2014 — Parts of ancientAntarctica were as warm as today's
California coast, and polar regions of the southernPacific Ocean registered 21st-century Florida heat,according to scientists using a new way to... full story
Climate; Global Warming; Early Climate;Environmental Issues
Today's Antarctica Once as Hot as California
Bark Beetles Change Rocky Mountain Stream Flows
Krypton Used to Date Ancient Antarctic Ice
Improving Understanding of Valley-Wide ...
Domesticated Chili Peppers Are from Mexico
Mystery of Domestication Deepens
New Material Coating Mimics 'Lotus Effect'
Biofuels from Corn Residue? Maybe Not
Rethinking 'Natural' Habitat for Wildlife
Future Heat Waves: Risk for Greater London
EnvironmentalAwareness
Rainforests
Climate
Exotic Species
Drought Research
Weather
Energy and theEnvironment
Cultures
Early Climate
Origin of Life
Early Mammals
Charles Darwin
Early Humans
Fossils
Human Evolution
North Dakota to begin drone tests for ag research
Study: Fuels from corn waste not better than gas
Poll: Big Bang a big question for most Americans
NASA: Engineer vital to 1969 moon landing dies
Easter morning delivery for space station
Saudi Arabia reports 2 more deaths from MERSvirus
Dispensaries in limbo as moratoriums sweepstate
Heineman signs Nebraska autism coverage bill
Bill bans smoking at all times in home day cares
Pfizer agrees to $190 million settlement overgeneric Neurontin
pdfcrowd.comopen in browser PRO version Are you a developer? Try out the HTML to PDF API
Free Subscriptions
Get the latest science news with ScienceDaily's freeemail newsletters, updated daily and weekly. Or viewhourly updated newsfeeds in your RSS reader:
Get Social & Mobile
Keep up to date with the latest news from ScienceDailyvia social networks and mobile apps:
Have Feedback?
Tell us what you think of ScienceDaily -- wewelcome both positive and negative comments.Have any problems using the site? Questions?
Find with keyword(s):
Search ScienceDaily Number of stories in archives: 140,361
Search
Enter a keyword or phrase to search ScienceDaily for related topicsand research stories.
Save/Print: Share:
Environment News
Technology News
About ScienceDaily | Editorial Staff | Awards & Reviews | Contribute News | Advertise with Us | Privacy Policy | Terms of UseCopyright 2014 by ScienceDaily, LLC or by third-party sources, where indicated. All rights controlled by their respective owners.
Content on this website is for informational purposes only. It is not intended to provide medical or other professional advice.Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.
Ocean Drones MakingWaves in ResearchWorld
Drought Concerns MayHurt Lake Tourism
Man Claims He FoundLoch Ness MonsterWith... Apple Maps?
First Ever 'FemalePenis' Discovered InAnimal Kingdom
generic Neurontin
Nepal tries to avert Sherpa strike on Everest
Sixty percent of Japanese support whale hunt
China's new environment law submitted toparliament
SD group urges uranium mine cleanup on EarthDay
Taiwan sets up sanctuary for endangeredhumpback dolphin
IBM, Atos, HP looking at Lufthansa ITinfrastructure unit: paper
Espionage hacking grows, with more from eastEurope: Verizon study
Mexican court to study America Movil injunctionagainst regulator
Netflix shares leap as membership climbs
AT&T looks to expand super-fast Internet service
Email Newsletters
RSS Feeds
Google+
iPhone
Android
Web
Leave Feedback
Contact Us