Navigation Links
Reading ancient climate from plankton shells
Date:10/25/2013

Climate changes from millions of years ago are recorded at daily rate in ancient sea shells, new research shows.

A huge X-ray microscope has revealed growth bands in plankton shells that show how shell chemistry records the sea temperature.

The results could allow scientists to chart short timescale changes in ocean temperatures hundreds of millions of years ago.

Plankton shells show features like tree rings, recording historical climate.

It's important to understand current climate change in the light of how climate has varied in the geological past. One way to do this, for the last few thousand years, is to analyse ice from the poles. The planet's temperature and atmosphere are recorded by bubbles of ancient air trapped in polar ice cores. The oldest Antarctic ice core records date back to around 800,000 years ago.

Results just published in the journal Earth and Planetary Sciences Letters reveal how ancient climate change, pushing back hundreds of millions of years ago into deep time, is recorded by the shells of oceanic plankton.

As microbial plankton grow in ocean waters, their shells, made of the mineral calcite, trap trace amounts of chemical impurities, maybe only a few atoms in a million getting replaced by impurity atoms. Scientists have noticed that plankton growing in warmer waters contain more impurities, but it has not been clear how and why this "proxy" for temperature works.

When the plankton die, they fall to the muddy ocean floor, and can be recovered today from that muddy ocean floor sediments, which preserve the shells as they are buried. The amount of impurity, measured in fossil plankton shells, provides a record of past ocean temperature, dating back more than 100 million years ago.

Now, researchers from the Department of Earth Sciences at the University of Cambridge have measured t
'/>"/>

Contact: Simon Redfern
satr@cam.ac.uk
44-075-303-12963
University of Cambridge
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Biometric Authentication Provides Better Mobile Device Security, Heavy Reading Finds
2. First dual-action compound kills cancer cells, stops them from spreading
3. Transmission routes of spreading protein particles
4. New method for researching understudied malaria-spreading mosquitoes
5. Reading, writing, arithmetic, and aerobics -- Evaluating the new R in academic performance
6. Reading the human genome
7. Stanford researchers develop tool for reading the minds of mice
8. Reading history through genetics
9. Joint UT study: Reading food labels helps shoppers stay thinner
10. New book on stereology by Mark West is essential reading for neurobiologists
11. Brain-wave-reading robot might help stroke patients
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Reading ancient climate from plankton shells
(Date:11/21/2014)...   Atmel® Corporation (NASDAQ: ATML ... technology solutions, today launched the industry,s first family of ... V cc range from 1.7V to 5.5V. The ... 2 C bus communication speeds, and are available with ... ideal for consumer, industrial, computer, and medical applications. ...
(Date:11/18/2014)... YORK , Nov. 18, 2014   ... identity authentication solutions, and MorphoTrust USA ... and services, today announced a strategic partnership to ... enterprise, motor vehicle administration (MVA), airport screening and ... in identity-related solutions, MorphoTrust serves consumers through a ...
(Date:11/10/2014)... U.S. store shelves in early 2010, and people have ... packets can be tossed into a washing machine without ... The convenience, though, has come with risks for young ... Children,s Hospital found that from 2012 through 2013, U.S. ... than 6 years of age swallowing, inhaling, or otherwise ...
Breaking Biology News(10 mins):Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3Study finds laundry detergent pods, serious poisoning risk for children 2
... from around the globe issued joint statements today to ... and innovation can play in the pursuit of sustainable ... threat of drug resistance in infectious agents including tuberculosis. ... leaders attending next month,s G8 Summit and other international ...
... exams might want to wait before pulling an all-night ... neurons are concerned. Carnegie Mellon University neuroscientists have discovered ... repeated exposure to a stimulus shrinks synapses. The findings ... Journal of Neuroscience . It,s well known ...
... by an international team of psychologists has shown that ... in brain activity guilt detection tests. Such tests, ... used by law enforcement agencies in several countries, including ... criminals will have specific memories of their crime stored ...
Cached Biology News:Science academies issue 'G-Science' statements to call world leaders' attention to global challenges 2Carnegie Mellon neuroscientists discover new phase of synaptic development 2People can 'beat' guilt detection tests by suppressing incriminating memories 2
(Date:11/24/2014)... , Nov. 24, 2014  Last week, ... G.K. Butterfield (D-NC) took a bold bipartisan ... by introducing the OPEN Act. Original co-sponsors of ... (D-FL). The Act will incentivize drug makers and ... rare diseases and pediatric cancers, which opens the ...
(Date:11/24/2014)... , November 24, 2014   ... on ScienceDirect   Elsevier , a world-leading ... is pleased to announce the launch of the latest title ... Current Opinion in Food Science . ... provide specialists with a new platform to keep up-to-date with ...
(Date:11/24/2014)... 2014 One of the most extensive, widely ... photonics is now available to high school and junior college ... SPIE, the international society for optics and photonics , announced ... SPIE Digital Library available to high schools for free ... are integral to all areas of life in today’s world,” ...
(Date:11/24/2014)... Dallas, Texas (PRWEB) November 24, 2014 ... China Adipic Dihydrazide Industry is a professional and ... It provides Adipic Dihydrazide information, like its definition, ... as industry overview. This report covers the international ... as global (such as the US, Europe, Asia, ...
Breaking Biology Technology:OPEN Act Introduced to Repurpose Drugs for Rare Diseases 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 3SPIE Digital Library Now Available to High Schools, Two-Year Colleges at No or Low Cost 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 3
... A benchtop version of the world,s smallest battery ... of a human hair has been created by a ... To better study the anode,s characteristics, the tiny ... microscope (TEM) at the Center for Integrated Nanotechnologies (CINT), ...
... Spherix Incorporated (Nasdaq: SPEX ), ... syndrome and atherosclerosis; and providers of technical and regulatory ... today announced that its Phase 2 diabetes clinical trial, ... of reducing HbA1c, found that the minimum dose capable ...
... 2010) -- Physicists from Rice University and Princeton University ... technology industry,s mainstay materials -- gallium arsenide semiconductors -- ... for next-generation computers. The discovery comes at a time ... nanophotonic devices directly to microchips and to boost processor ...
Cached Biology Technology:World's smallest battery created at CINT nanotechnology center 2World's smallest battery created at CINT nanotechnology center 3Spherix Phase 2 Trial with D-tagatose Determines Minimum Dose for HbA1c and Triglycerides 2Spherix Phase 2 Trial with D-tagatose Determines Minimum Dose for HbA1c and Triglycerides 3Spherix Phase 2 Trial with D-tagatose Determines Minimum Dose for HbA1c and Triglycerides 4Rice physicists discover ultrasensitive microwave detector 2
... Laser Capture Microdissection (LCM) is the ... worldwide. Veritas Microdissection is the only instrument ... providing unmatched flexibility., UV Laser ... ,Ideal for non-soft tissues and capturing large ...
... VersArray ChipReader systems are highly sensitive laser ... microarrays. These are advanced scanners that meet ... and background level, and optimizing the signal ... top end of the range for increased ...
Hybridizer (220 V) For more information, please visit Dako' web-site. EU regulatory status: CE US regulatory status: IVD...
... 96 assays on four slides. The new ... with 96 (6mm x 7mm) individual printing ... or screening analysis studies. Unlike other systems, ... eliminating the presence of contaminating adhesives. The ...
Biology Products: