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

e winter.

"Understanding Late Cretaceous climate should inform debate about future climate trends and variability under greenhouse conditions," said Kemp, whose team's new findings are published in Geophysical Research Letters.

In both studies, Kemp and his collaborators analysed sediment cores from a marine ridge in the Arctic Ocean. These sediments date to the Late Cretaceous (69󈞸 million years ago) and contain fossil remains of diatoms, an important group of phytoplankton tiny planktonic marine plants.

The sediments contain alternating band-like laminae of two types, representing diatom growth conditions in the Arctic spring and summer, respectively. Each year is represented by a couplet of laminae, one of each type, which allowed the researchers to reconstruct ocean conditions at annual resolution.

"The presence of diatom laminae testify to ice-free Arctic summers during the Late Cretaceous, although there is also evidence of ice rafting by intermittent winter ice," said Kemp.

The researchers analysed two sections of sediment core covering between them a continuous period of around 1,000 years. By analysing the characteristics of the diatom laminae and measuring their thickness they were able to reconstruct climate-driven variation in ocean conditions both between years and over decades.

Their analyses revealed that the Arctic climate of the Late Cretaceous varied over various timescales with periodicities closely matching those observed in the modern Arctic. It therefore appears that the Arctic was subject to some of the same climatic influences in the Late Cretaceous as it is today, including ENSO, which periodically transmits equatorial influences to high-latitudes via ocean-atmosphere interactions.

"A modern Arctic lacking permanent sea ice should be subject to similar influences as it was under greenhouse conditions in the Late Cretaceous," said Kemp.

This is
'/>"/>

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:7/27/2015)... , July 27, 2015   Zynx ... and experience-based clinical improvement solutions, today announced that ... is now available on Android smartphones and tablets. ... and post-care organizations can use ZynxCarebook to securely ... patient,s condition, streamline care transitions to other care ...
(Date:7/21/2015)... July 21, 2015 Passwords have proven ... in the recent U.S. Office of Personnel Management ... the infosec conundrum, but developers and end-users are ... address this dilemma, Biometrics-as-a-Service provider HYPR Corp. announced ... SDK for third party integration. ...
(Date:7/9/2015)... 07, 2015 Research ... of the "Biometrics for Banking; Market & ... report to their offering. The adoption ... this growth and the forecast is that by ... for companies involved in delivering biometric systems to ...
Breaking Biology News(10 mins):Zynx Health Adds Android Device Support to ZynxCarebook Solution 2Zynx Health Adds Android Device Support to ZynxCarebook Solution 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3
... burden of malaria remains the subject of "best guesses," ... remains "driven by perceptions and politics, rather than an ... in PLoS Medicine. , Simon Hay and Robert Snow ... that it has been almost 40 years since the ...
... in Fantastic Voyage, doctors might soon be able to ... find where and how much of a cancer treatment ... in a study published today in the open access ... and quantify molecules within individual mammalian or bacterial cells. ...
... a single gene, researchers can prevent skin stem cells from ... epidermal, sebaceous and hair cells. They say this finding could ... in the lab, for both research and potential therapies. , ... the ability to differentiate into multiple types of tissues, one ...
Cached Biology News:Fantastic Voyage: A new nanoscale view of the biological world 2Researchers identify a key regulator for skin stem cells 2
(Date:8/3/2015)... ... 03, 2015 , ... Sterlitech Corporation introduces the compact, quiet, ... analytical laboratory equipment. With optimized features, such as PTFE-coated contact surfaces, an oil-free ... maintenance-free solution for a broad range of vacuum filtration applications. , Featuring a ...
(Date:7/31/2015)... , ... July 31, 2015 , ... ... the detection and quantification of partially hydrolyzed gluten in foods, has been accepted ... adopted the method “Partially Hydrolyzed Gluten in Fermented Cereal-Based Products by R5 Competitive ...
(Date:7/30/2015)... ... July 30, 2015 , ... ... Francois Vieillard as Sales & Marketing Director. , With more than 25 ... be responsible for reinforcing Tronics’ business development activities worldwide. He brings to the ...
(Date:7/30/2015)... CITY, Kan. , July 30, 2015 /PRNewswire/ ... ), a pet therapeutics company focused on the ... for companion animals, today announced that its strategic ... from a dose confirmation study of AT-016, an ... Aratana for the treatment of osteoarthritis pain in ...
Breaking Biology Technology:Sterlitech Launches New Line of Vacuum Pumps 2RIDASCREEN® Competitve Gliadin Receives AOAC Official First Action Status 2Tronics appoints Francois Vieillard as Sales and Marketing Director 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 5
... Life Technologies Corporation today announced that its Ion Personal ... Innovative New Product "MIP" Awards luncheon hosted by CONNECT in ... disruptive technology in the gene sequencing field. Since ... uptake in research labs around the world and has been ...
...  Puma Biotechnology, Inc., a development stage biopharmaceutical company, ... trials of Puma,s investigational drug PB272 (neratinib) were ... Cancer Symposium that is currently taking place in ... below: Safety and Efficacy ...
... MIAMI BEACH, Fla., Dec. 9, 2011  As hundreds ... at the International Society for Fertility Preservation,s 2nd ... in reproductive endocrinology, urology and oncology announced the ... coalition to help newly diagnosed cancer patients in ...
Cached Biology Technology:Life Technologies' Ion Personal Genome Machine Receives San Diego's CONNECT Most Innovative New Product Award 2Life Technologies' Ion Personal Genome Machine Receives San Diego's CONNECT Most Innovative New Product Award 3Puma Biotechnology Announces Positive PB272 (Neratinib) Phase II Data at CTRC-AACR San Antonio Breast Cancer Symposium 2Puma Biotechnology Announces Positive PB272 (Neratinib) Phase II Data at CTRC-AACR San Antonio Breast Cancer Symposium 3Puma Biotechnology Announces Positive PB272 (Neratinib) Phase II Data at CTRC-AACR San Antonio Breast Cancer Symposium 4Puma Biotechnology Announces Positive PB272 (Neratinib) Phase II Data at CTRC-AACR San Antonio Breast Cancer Symposium 5Puma Biotechnology Announces Positive PB272 (Neratinib) Phase II Data at CTRC-AACR San Antonio Breast Cancer Symposium 6Experts Launch the Alliance for Fertility Preservation at the International Society for Fertility Preservation's 2nd World Congress 2Experts Launch the Alliance for Fertility Preservation at the International Society for Fertility Preservation's 2nd World Congress 3
Request Info...
Immunogen: Heat inactivated bacterial cells of Salmonella enteriditis,paratyphi and typhimurium Storage: 4 C...
US Pharmacopoeia Purified-Water/Water-for-Injection Quality Water...
... Clone/PAD: 3B8A10. ... to the C-terminal region ... Specificity: Specific for the ... Reactivity: Human (positive control: ...
Biology Products: