Buddhist Catholic Contemplative Evangelical General Christian Hindu Jewish Latter-day Saint Muslim New Visions Progressive Christian

Beliefs

Topics

Columnists

Resource Library

Research Tools

Video

Podcasts

Thought Readers

Faith In Media Tracker

Newsletters

Ad-Free & Subscriber Log-In Subscription Support

Follow Patheos

Drishtikone

Home
Hindu
Arctic Ice is Melting

Arctic Ice is Melting

Last updated on: October 3, 2005 at 3:34 pm by Desh Kapoor

Arctic Ice is Melting 2005-10-03T15:34:03-05:00 Desh Kapoor

LOGO Patheos Explore the world's faith through different perspectives on religion and spirituality! Patheos has the views of the prevalent religions and spiritualities of the world.

URL Link:

http://www.nytimes.com/2005/09/29/science/29ice.html?pagewanted=print

Highlights:

The floating cap of sea ice on the Arctic Ocean shrank this summer to what is probably its smallest size in at least a century of record keeping, continuing a trend toward less summer ice, a team of climate experts reported yesterday.

That shift is hard to explain without attributing it in part to human-caused global warming, the team’s members and other experts on the region said.

The change also appears to be headed toward becoming self-sustaining: the increased open water absorbs solar energy that would otherwise be reflected back into space by bright white ice, said Ted A. Scambos, a scientist at the National Snow and Ice Data Center in Boulder, Colo., which compiled the data along with the National Aeronautics and Space Administration.

“Feedbacks in the system are starting to take hold,” Dr. Scambos said.

The data was released on the center’s Web site, www.nsidc.org.

The findings are consistent with recent computer simulations showing that a buildup of smokestack and tailpipe emissions of greenhouse gases could lead to a profoundly transformed Arctic later this century, when much of the once ice-locked ocean would routinely become open water in summers.

Expanding areas of open water in the summer could be a boon to whales and cod stocks, and the ice retreat could create summertime shipping shortcuts between the Atlantic and the Pacific.

But a host of troubles lie ahead as well. One of the most important consequences of Arctic warming will be increased flows of meltwater and icebergs from glaciers and ice sheets, and thus an accelerated rise in sea levels, threatening coastal areas. The loss of sea ice could also hurt both polar bears and Eskimo seal hunters.

The Arctic ice cap always grows in the winter and shrinks in the summer. The average minimum area from 1979, when precise satellite mapping began, until 2000 was 2.69 million square miles, similar in size to the contiguous area of the United States. The new summer low, measured on Sept. 19, was 20 percent below that.

Before 1979, scientists estimated the size of the ice cap based on reports from ships and airplanes.

The difference between the average ice area and the area that persisted this summer was about 500,000 square miles, an area about twice the size of Texas, the scientists said.

This summer was the fourth in a row with the ice cap areas sharply below the long-term average, said Mark C. Serreze, a senior scientist at the snow and ice center and a professor at the University of Colorado, Boulder.

Dr. Scambos said the consecutive reductions in the ice cap “make it pretty certain a long-term decline is under way.”

A natural cycle in the polar atmosphere called the Arctic oscillation, which contributed to the reduction in Arctic ice in the past, did not appear to be a factor in the past several years, Dr. Serreze said.

He said the role of accumulating greenhouse gas emissions had become increasingly apparent with rising air and sea temperatures. Still, many scientists say it is not yet possible to determine what portion of Arctic change is being caused by rising levels of carbon dioxide and other emissions from human sources and how much is just climate’s usual wiggles.

Dr. Serreze and other scientists said that more variability could lie ahead and that the area of sea ice could actually increase some years. But the scientists have found few hints that other factors, like more Arctic cloudiness in a warming world, will reverse the trend.

“With all that dark open water, you start to see an increase in Arctic Ocean heat storage,” Dr. Serreze said. “Come autumn and winter that makes it a lot harder to grow ice, and the next spring you’re left with less and thinner ice. And it’s easier to lose even more the next year.”

The result, he said, is that the Arctic is “becoming a profoundly different place than we grew up thinking about.”

Other experts on Arctic ice and climate disagreed on details. For example, Ignatius G. Rigor at the University of Washington said the change was probably linked to a mix of factors, including influences of the atmospheric cycle.

But he agreed with Dr. Serreze that the influence from greenhouse gases had to be involved.

“The global warming idea has to be a good part of the story,” Dr. Rigor said. “I think we have a different climate state in the Arctic now. All of these feedbacks are starting to kick in and really snuffing the ice out by the end of summer.”

Other experts expressed some caution. Claire L. Parkinson, a sea ice expert at NASA’s Goddard Space Flight Center in Greenbelt, Md., said a host of changes in the Arctic – including rising temperatures, melting permafrost and shrinking sea ice – were consistent with human-caused warming. But she emphasized that the complicated system was still far from completely understood.

William L. Chapman, a sea ice researcher at the University of Illinois Urbana-Champaign, said it was important to keep in mind that the size of the ice cap could vary tremendously, in part because of changes in wind patterns, which can cause the ice to heap up against one Arctic shore or drift away from another.

Source:
New York Times

Global Warming

Previous Post

October 3, 2005

Top Graduates Line Up to Teach to the Poor

Next Post

October 3, 2005 Demystifying the World of Options

Browse Our Archives

Select a Category Aarti Achievement and Leadership AfPak Africa Annual and Year-end Asia Audio Australia Behavioural Sciences Bhagwad Gita Bhagwad Gita Blogging Blogs Business Business Intelligence Business Strategy Cannes Careers Chanakya China Conservation Corruption Creative Daily Links Desh Poems Development & Welfare Devotional Audio Devotional Songs Drama Earth Economics Education Entertainment Environment Europe Everyday Quotes Featured Articles Featured Songs Finance Flickr Pictures Food Geo-Political Global Warming Globalization Health & Medicine Hinduism Historic History Humour India Indian Culture Indian music Indian Weddings Israel Issues Legal Link Love Minorities Misc Motivation and Personal Development Movie Lists Movie Reviews Movies Mumbai terror attacks Natural Disasters Nature News Outsourcing Pakistan Parenting Personal Philosophy Poetry Politics Poverty Quotes Recipe Regular Blog Post Relationships Religion Religious/Spiritual Audio Sciences Showcase Slideshow South Asia Special Stories Spiritual Quotes Spirituality Sports Stories Strategy Technology Technology Terrorism Travel Uncategorized US Video Women Women_s Rights Worship Yoga

Select a Month December 2015 November 2015 October 2015 September 2015 August 2015 June 2015 April 2015 March 2015 February 2015 September 2014 August 2014 January 2014 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005

TAKE THE

Religious Wisdom Quiz

Who did Paul call "my true child in the faith"?

Select your answer to see how you score.

Timothy James Silas Barnabas