Navigation Links
Arctic could face warmer and ice-free conditions

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
United States Geological Survey

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:
(Date:11/12/2015)... Nov. 11, 2015   Growing need for ... tools has been paving the way for use ... of discrete analytes in clinical, agricultural, environmental, food ... predominantly used in medical applications, however, their adoption ... due to continuous emphasis on improving product quality ...
(Date:11/9/2015)... Nov. 9, 2015  Synaptics Inc. (NASDAQ: SYNA ... announced broader entry into the automotive market with a ... the pace of consumer electronics human interface innovation. Synaptics, ... ideal for the automotive industry and will be implemented ... Europe , Japan , ...
(Date:10/29/2015)... -- Daon, a global leader in mobile biometric authentication ... version of its IdentityX Platform , IdentityX v4.0. ... have already installed IdentityX v4.0 and are seeing ... UAF certified server component as an option and ... These customers include some of the largest and most ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... -- 2 nouvelles études permettent d , ... entre les souches bactériennes retrouvées dans la plaque ... . Ces recherches  ouvrent une nouvelle voie ... efficace de l,un des problèmes de santé les ...    --> 2 nouvelles études permettent d ...
(Date:11/25/2015)... HOLLISTON, Mass. , Nov. 25, 2015 ... HART ), a biotechnology company developing bioengineered organ implants ... McGorry will present at the LD Micro "Main ... 2:30 p.m. PT. The presentation will be webcast live ... Management will also be available at the conference for ...
(Date:11/25/2015)... 2015 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ:  AEZS; TSX: ... prospects remain fundamentally strong and highlights the following ... received DSMB recommendation to continue the ZoptEC Phase ... the final interim efficacy and safety data ... men with heavily pretreated castration- and Taxane-resistant prostate ...
(Date:11/25/2015)... 25, 2015 Orexigen® Therapeutics, Inc. (Nasdaq: ... a fireside chat discussion at the Piper Jaffray 27th ... . The discussion is scheduled for Wednesday, December 2, ... .  A replay will be available for 14 days ... , Julie NormartVP, Corporate Communications and Business Development , ...
Breaking Biology Technology: