Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Alpine glaciers could all but disappear within this century

10.07.2006
The European Alps could lose some 80 percent of their glacier cover by the end of this century, if summer air temperatures rise by three degrees Celsius [five degrees Fahrenheit]. And if temperatures increase by five degrees Celsius [nine degrees Fahrenheit], the Alps would become almost completely ice-free by 2100.

These are the conclusions of numerical modeling experiments by scientists from the University of Zurich, Switzerland. The study will be published 15 July in Geophysical Research Letters, a journal of the American Geophysical Union.

Scientists consider glaciers to be among the best natural indicators of climate change and, therefore, monitor them closely. Rapidly shrinking glacier areas, spectacular tongue retreats, and increasing mass losses are clear signs of the atmospheric warming observed in the Alps during the last 150 years.

Michael Zemp and colleagues in the Department of Geography of the University of Zurich note that in the 1970s, about 5,150 Alpine glaciers covered a total area of 2,909 square kilometers [1,123 square miles]. This represented a loss of about 35 percent of glacial area from 1850 to that time. Accelerated loss of ice cover since then has resulted in a total loss of 50 percent of the 1850 area, culminating in a volume loss of 5 to 10 percent of the remaining ice during the extraordinary warm year of 2003.

According to the Intergovernmental Panel on Climate Change (IPCC), an increase in summer air temperature of one to five degrees Celsius [two to nine degrees Fahrenheit] and a precipitation change between minus-20 percent and plus-30 percent by the end of the 21st century is a plausible scenario. The University of Zurich researchers say that for each one degree Celsius [two degrees Fahrenheit] increase in mean summer temperature, precipitation would have to increase by 25 percent to offset the glacial loss.

"Our study shows that under such scenarios, the majority of Alpine glaciers might disappear within the coming decades", says glaciologist Zemp, lead author of the study. With an increase in summer temperature of more than three degree Celsius [five degrees Fahrenheit], only the largest glaciers, such as the Great Aletsch Glacier [in Switzerland], and those on the highest mountain peaks could survive into the 22nd century. "Especially in densely populated high mountain areas such as the European Alps, one should start immediately to consider the consequences of such extreme glacier wasting on the hydrological cycles, water management, tourism, and natural hazards," he says.

The study was funded by the European Union, through the Swiss Federal Office of Education and Science.

Harvey Leifert | American Geophysical Union
Further information:
http://www.agu.org
http://www.geo.unizh.ch

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.

The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Quantum bugs, meet your new swatter

20.08.2018 | Information Technology

A novel synthetic antibody enables conditional “protein knockdown” in vertebrates

20.08.2018 | Life Sciences

Metamolds: Molding a mold

20.08.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>