Navigation Links
Arctic could face warmer and ice-free conditions
Date:12/29/2009

There is increased evidence that the Arctic could face seasonally ice-free conditions and much warmer temperatures in the future.

Scientists documented evidence that the Arctic Ocean and Nordic Seas were too warm to support summer sea ice during the mid-Pliocene warm period (3.3 to 3 million years ago). This period is characterized by warm temperatures similar to those projected for the end of this century, and is used as an analog to understand future conditions.

The U.S. Geological Survey found that summer sea-surface temperatures in the Arctic were between 10 to 18C (50 to 64F) during the mid-Pliocene, while current temperatures are around or below 0C (32F).

Examining past climate conditions allows for a true understanding of how Earth's climate system really functions. USGS research on the mid-Pliocene is the most comprehensive global reconstruction for any warm period. This will help refine climate models, which currently underestimate the rate of sea ice loss in the Arctic.

Loss of sea ice could have varied and extensive consequences, such as contributions to continued Arctic warming, accelerated coastal erosion due to increased wave activity, impacts to large predators (polar bears and seals) that depend on sea ice cover, intensified mid-latitude storm tracks and increased winter precipitation in western and southern Europe, and less rainfall in the American west.

"In looking back 3 million years, we see a very different pattern of heat distribution than today with much warmer waters in the high latitudes," said USGS scientist Marci Robinson. "The lack of summer sea ice during the mid-Pliocene suggests that the record-setting melting of Arctic sea ice over the past few years could be an early warning of more significant changes to come."

Global average surface temperatures during the mid-Pliocene were about 3C (5.5F) greater than today and within the range projected for the 21st century by the Intergovernmental Panel on Climate Change.


'/>"/>

Contact: Jessica Robertson
jrobertson@usgs.gov
703-648-6624
United States Geological Survey
Source:Eurekalert

Related biology news :

1. Texas researchers and educators head for Antarctica
2. LSU professor looks for life in and under antarctic ice
3. Satellites witness lowest Arctic ice coverage in history
4. Woods Hole Research Center to lead undergraduate initiative in the Siberian Arctic
5. Less Arctic ice means higher risks, experts warn
6. ANDRILLs 2nd Antarctic drilling season exceeds all expectations
7. Massive dinosaur discovered in Antarctica sheds light on life, distribution of sauropodomorphs
8. High degree of resistance to antibiotics in Arctic birds
9. Antarctic ice loss
10. Exploration of lake hidden beneath Antarcticas ice sheet begins
11. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2016)... , April 13, 2016  IMPOWER physicians supporting ... are setting a new clinical standard in telehealth thanks ... By leveraging the higi platform, IMPOWER patients can routinely ... pulse and body mass index, and, when they opt ... and convenient visit to a local retail location at ...
(Date:3/22/2016)... 2016 According to ... for Consumer Industry by Type (Image, Motion, Pressure, ... & IT, Entertainment, Home Appliances, & Wearable ... 2022", published by MarketsandMarkets, the market for ... USD 26.76 Billion by 2022, at a ...
(Date:3/15/2016)... --> --> ... Research "Digital Door Lock Systems Market - Global Industry Analysis, ... global digital door lock systems market in terms of revenue ... forecast to grow at a CAGR of 31.8% during the ... enterprises (MSMEs) across the world and high industrial activity driving ...
Breaking Biology News(10 mins):
(Date:5/2/2016)... ... May 02, 2016 , ... Meister Media Worldwide launches ... look and added functionality give the agricultural world a taste of Meister Media ... in agriculture – from precision farming via satellites and Unmanned Aerial Vehicles (UAVs) ...
(Date:4/29/2016)... ... April 29, 2016 , ... ... pain medicine, is excited to announce the launch of the Proove Health ... studies, volunteerism, and education to promote the use of personalized medicine for tackling ...
(Date:4/29/2016)... ... April 29, 2016 , ... Summit for Stem Cell has received ... of a patient-specific stem cell therapy for the treatment of Parkinson’s disease. The Summit ... Loring at The Scripps Research Institute in San Diego, CA. , The ...
(Date:4/28/2016)... April 28, 2016 Q ... the Company,s CEO  was featured in an article ... When VCs Fear To Tread: http://www.lifescienceleader.com/doc/accelerators-enter-when-vcs-fear-to-tread-0001 ... magazine is an essential business journal for ... emerging biotechs to Big Pharmas. Their content is ...
Breaking Biology Technology: