Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Newly drilled ice cores may be the longest taken from the Andes

04.11.2009
Researchers spent two months this summer high in the Peruvian Andes and brought back two cores, the longest ever drilled from ice fields in the tropics.

Ohio State glaciologist Lonnie Thompson said that this latest expedition focused on a yet-to-be-named ice field 5,364 meters (17,598 feet) above sea level in the Cordillera Blanca mountain range.

The researchers hiked to a col, or saddle, between two adjacent peaks – Hualcán and Copa – set up camp and used a ground sensing radar to map the ice depths across the glacier . They then drilled two cores through the thickest part of the ancient ice to bedrock, capturing the entire climate record at this site.

One of the cores measured 196 meters (643 feet) while the other totaled 189 meters (620 feet). Thompson said that the initial visual inspection of the cores showed that they contained a number of insects and plant materials that may have blown up onto the glacier from the Amazon Basin.

... more about:
»Andes Mountains »oxygen isotope

“I’ve never seen so many of what appear to be plants and insects in any of the ice cores we’ve previously drilled,” he said. “We should be able to identify them and use carbon-14 to date them.

“This will help us determine the age of the ice in the core. These cores also contain very distinct bubble-free, or clear, ice near the bottom which suggests very warm conditions in the past. The cores only arrived back to the freezers at OSU a few weeks ago so we have lots of work to do.”

Thompson, a professor of earth sciences at Ohio State and research scientist at the Byrd Polar Research Center, said that his team did a preliminary analysis for oxygen isotopes and dust particles from a 10-meter (33-foot) section of the core. These results confirmed that the core contains an annually resolvable record of the climate conditions at the site.

The ratio of oxygen isotopes in the ice allows researchers to determine whether temperatures were warmer or cooler when the snow that eventually turned to ice was deposited on the glacier. The dust content gives scientists clues about the rate of precipitation at the site.

“This was the last opportunity anyone will have to drill at this site,” Thompson said . “The warming temperatures there cause melting that compromises the quality of records preserved in the ice. Any future drilling efforts will have to be at colder, and higher, elevations to minimize the impact of melting that can obscure the climate record. Unfortunately there are very few good drill sites above 5364 meters (17,598) in the Cordillera Blanca.”

The Paleoclimate Program of the National Science Foundation provided much of the support for this research project, along with the Ohio State University Climate, Water and Carbon program.

Contact: Lonnie Thompson, (614) 292-6652; Thompson.3@osu.edu
Written by Earle Holland, (614) 292-8384: Holland.8@#osu.edu

Lonnie Thompson | EurekAlert!
Further information:
http://www.osu.edu

Further reports about: Andes Mountains oxygen isotope

More articles from Earth Sciences:

nachricht Novel method for investigating pore geometry in rocks
18.06.2018 | Kyushu University, I2CNER

nachricht Decades of satellite monitoring reveal Antarctic ice loss
14.06.2018 | University of Maryland

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

Im Focus: Photoexcited graphene puzzle solved

A boost for graphene-based light detectors

Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Carbon nanotube optics provide optical-based quantum cryptography and quantum computing

19.06.2018 | Physics and Astronomy

How to track and trace a protein: Nanosensors monitor intracellular deliveries

19.06.2018 | Life Sciences

New material for splitting water

19.06.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>