Navigation Links
Arctic climate variation under ancient greenhouse conditions
Date:2/11/2011

Tiny organisms preserved in marine sediments hold clues about Arctic climate variation during an ancient episode of greenhouse warming.

Based on reconstructions of Arctic climate variability in the greenhouse world of the Late Cretaceous, Southampton scientists have concluded that man-made global warming probably would not greatly change the climatic influence associated with natural modes of inter-annual climate variability such as the El Nio Southern Oscillation (ENSO) or the Arctic Oscillation/ North Atlantic Oscillation (AO/ NAO).

"Even in the warm Cretaceous period, the patterns of these climatic oscillations changed over longer decadal timescales," explained Professor Alan Kemp of the University of Southampton's School of Ocean and Earth Science based at the National Oceanography Centre, Southampton. "It is therefore difficult to predict whether anthropogenically driven warming will lead to systematic changes such as persistently milder European winters (a positive AO/ NAO) as some have suggested."

It is anticipated that the Arctic Ocean will become ice free during the summer within the next 15󈞞 years as a result of global warming. Because sea ice is reflective, its loss will reduce the amount of the Sun's energy bounced back out to space, thereby amplifying regional warming. However, changes in atmospheric circulation could also occur, making it difficult to unravel the likely net effect on climate.

"A key question is how an Arctic without permanent ice cover will affect atmospheric circulation and climate variability, particularly over high and mid latitudes," said Kemp.

One way of addressing this issue is to look back at previous greenhouse episodes in Earth's history. For example, Kemp's group has previously reported in the journal Nature that during the Late Cretaceous, when the dinosaurs roamed the world, the Arctic Ocean was free of ice in summer with only intermittent sea ice in th
'/>"/>

Contact: Dr. Rory Howlett
r.howlett@noc.soton.ac.uk
National Oceanography Centre, Southampton (UK)
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Arctic sea ice thinning at record rate
2. FSU Historians Arctic research has him sitting on top of the world
3. First comprehensive inventory of life in Antarctica
4. ESA satellites focusing on the Arctic
5. Arctic heats up more than other places
6. Global warming threatens Antarctic sea life
7. Marine scientists to assess environment before offshore drilling begins in US arctic waters
8. CO2 drop and global cooling caused Antarctic glacier to form
9. Final frontier: Mission to explore buried ancient Antarctic lake given green light
10. UK robot sub searches for signs of melting 60 km into an Antarctic ice shelf cavity
11. Arctic governments and industry still unprepared for oil spills 20 years after Exxon Valdez
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Arctic climate variation under ancient greenhouse conditions
(Date:7/11/2014)... division of the striatum is also involved in ... of substance P in the striatal marginal division ... his team, College of Biophotonics, South China Normal ... P receptor, neurokinin 1 was highly expressed in ... rats. Unilateral or bilateral injection of an antisense ...
(Date:7/11/2014)... Evidence exists that cannabinoid receptor type 1 ... Ca2+ influx, and reduce neurotransmitter release. However, ... 1 can increase extracellular Ca2+ influx and ... his team, Tongji Hospital Affiliated to Tongji ... Technology, China used whole cell voltage-clamp and ...
(Date:7/11/2014)... toxins to study the proteins that let nerve cells ... have stumbled upon a biological tactic that may offer ... in a safe and environmentally responsible way. , ... for one species and harmless for a closely related ... pests without harming beneficial species like bees. A summary ...
Breaking Biology News(10 mins):Potent spider toxin 'electrocutes' German, not American, cockroaches 2Potent spider toxin 'electrocutes' German, not American, cockroaches 3
... The International Rett Syndrome Foundation (IRSF) has named ... the 7th World Congress for Rett Syndrome. ... meetings targeting researchers, clinicians, medical professionals and families ... Family Education Conference and a Science Symposium co-chaired ...
... Conservation Science and the Department of Fish and Game have ... on bird species of greatest concern. This first-of-its-kind study prioritizes ... conservation measures in California. The study was published this week ... exciting about the study is that our unique approach is ...
... thousands of cargo containers from around the world pass through ... some that are not so welcome: drugs, explosives, chemical, biological, ... The possible concealment of such items in containers led lawmakers ... cargo containersthousands per port per day. The Department of ...
Cached Biology News:New study will help protect vulnerable birds from impacts of climate change 2When your ship comes in 2When your ship comes in 3
(Date:7/11/2014)... EPFL and the University of  Geneva  (UNIGE) ... P. Donoghue . The American neuroscientist is to head ... The new Wyss Center for Bio- and Neuro-Engineering, ... , has named as its director one of the ... founder of Brown University,s Institute for Brain Science, has ...
(Date:7/10/2014)... 2014 Product and process impurities ... abundance and are often “lost in the noise,” ... Join presenters Dr. Rowel Tobias, Senior Scientist, Protein ... Head of Quality at Nanotherapeutics, Inc., to lear ... speed detection and quantitation while achieving the required ...
(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of ... to announce the relaunch of his highly informative blog, now ... called “ What are Stem Cells ?” Dr. Harman’s ... foundation in the basics of stem cell therapy so that ... type of treatment when considering regenerative medicine. , A veterinarian ...
(Date:7/10/2014)... 10, 2014 On July 9 ... , presented Russia,s first national ... The Company is developing a unique project called ... develops a number of innovative drugs based on monoclonal ... ceremony took place at the International Exhibition "Innoprom 2014" ...
Breaking Biology Technology:John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 2John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 3Novel Ms Techniques Speed Detection of Biopharmaceutical Product and Process Impurities, New Webinar Hosted by Xtalks 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2
... Executive Chairman and CFO Assume Leadership Responsibilities; CEO Search ... ... Calif., Jan. 30 Genelabs,Technologies, Inc. (Nasdaq: GNLB ) announced ... Officer and Director of the,company, effective January 29, 2008. Irene A. ...
... BioPharma Corp. (TSX: HBP / Frankfurt: WKN 918864), ... BioPharma Corp.,announces that at the Company,s Annual General ... of the resolutions presented by,management, appointing KPMG LLP ... Jack Kay, Slawomir Majewski, and Gordon Lickrish as,directors, ...
... Fla., Jan. 30 John Wagner, M.D., recognized as,a ... transplantation, has joined,the team at CORD:USE Cord Blood Bank. ... stem cell biology will provide a,significant contribution to CORD:USE., ... a member of our,distinguished team," says Edward Guindi, M.D., ...
Cached Biology Technology:Genelabs Technologies, Inc. Announces Resignation of President and CEO 2Helix BioPharma shareholders vote in favour of management 2CORD:USE Cord Blood Bank Announces the Addition of Dr. John Wagner, a Pioneer in the Use of Umbilical Cord Blood Stem Cells, to Its Scientific Advisory Board 2CORD:USE Cord Blood Bank Announces the Addition of Dr. John Wagner, a Pioneer in the Use of Umbilical Cord Blood Stem Cells, to Its Scientific Advisory Board 3
... products ATP-Free using Mo Bio luciferase assay. Mo ... service that will allow you to certify your ... and enable you to deliver them to your ... ATP detection limit is 3.5 x 10-12 /l, ...
... provides a comprehensive microarray service for ... embedded within non-coding RNAs (ncRNAs) using ... probe design, which enables highly sensitive ... RNAs (1). This comprehensive service includes ...
Best pricing for 100mg-1.0g scales. Phosphopeptides are our specialty....
... For knockdown of all human, mouse, ... , Genomewide, predesigned siRNAs for ... , Ready-to-use, convenient matching solutions ... Cost-effective RNAi and downstream ...
Biology Products: