Coral layers good proxy for Atlantic climate cycles

Tree rings may tell how old a tree is, but the rings or annual bands in some skeletal coral may tell not only the age of the animal, but also something of the dynamics of the ocean in which it grew, according to Penn State and University of Miami researchers.

"Some coral grows like a tree; each year a complete layer with both a high and low-density skeletal calcium carbonate band is formed by the coral animal," says Dr. Lisa Greer, assistant professor of geosciences. "Not all corals create rings, but the massive corals like boulder star coral or pin cushion coral do."

Greer, and Dr. Peter Swart, professor at the Rosenstiel School of Marine and Atmospheric Science, University of Miami, looked at both modern and fossil corals to see if the calcium carbonate of the coral skeletons could shed light on the temperature and salinity of the tropical Atlantic Ocean.

"In contrast to research in the tropical Pacific, there have been few definitive studies utilizing proxy records within Atlantic coral skeletons to provide information on the climate dynamics in this region," Greer told attendees at the fall meeting of the American Geophysical Union today (Dec. 7) in San Francisco.

Information on the climate dynamics of the Atlantic is necessary as input to global and regional climate models. Not only are the current dynamic patterns important, but patterns from the past, which may differ from today, are important as well.

Greer uses a dental x-ray to locate the coral layers in a very thin slice taken from the core. In modern coral, she then counts down from the top to associate the layers with actual years. The sample she reported on was taken in 1994 and went back to 1935. Once the layers are located, Greer takes very small samples of the coral in a line running up the coral section. She averages about 22 samples per year covering the 59-year span.

Greer and Swart were investigating the relationship between non-radioactive or stable iso

Contact: A'ndrea Elyse Messer
Penn State

Page: 1 2 3

Related biology news :

1. Corals can reestablish symbiosis with algae from their environments after bleaching
2. Research: Coral reefs decline actually began centuries ago
3. Corals defy species classification
4. Coral smothering green tide seaweed spreading on Florida reefs
5. Coralreef fish desperately needs mangrove forests and seagrass fields
6. Corals are being robbed of light
7. Increasing Carbon Dioxide Threatens Tropical Coral Reefs
8. The Presidents Coral Reef Task Force Meets On March 5-6
9. Bleached Coral Could Be Environment Warning
10. USGS Measures Coral Reef Recovery In Culebra, Puerto Rico
11. Scientists Urge Further Study Of Alarming Coral Reef Decline

Post Your Comments:

(Date:4/11/2017)... Apr. 11, 2017 Research and Markets has ... report to their offering. ... The global eye tracking market to grow at a CAGR of ... Eye Tracking Market 2017-2021, has been prepared based on an in-depth ... market landscape and its growth prospects over the coming years. The ...
(Date:4/5/2017)... 5, 2017 Today HYPR Corp. , ... server component of the HYPR platform is officially ... end-to-end security architecture that empowers biometric authentication across Fortune ... already secured over 15 million users across the financial ... connected home product suites and physical access represent a ...
(Date:3/30/2017)... 2017 The research team of The Hong ... fingerprint identification by adopting ground breaking 3D fingerprint minutiae recovery and ... speed and accuracy for use in identification, crime investigation, immigration control, ... ... A research team led ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ... has granted orphan drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer and ... of osteosarcoma. SBT-100 is able to cross the cell membrane and bind intracellular ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO ... Diego Rotary Club. The event entitled “Stem Cells and Their Regenerative ... attendees. Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. ...
(Date:10/10/2017)... PITTSBURGH, PA (PRWEB) , ... October 10, 2017 ... ... this year’s recipients of 13 prestigious awards honoring scientists who ... be presented in a scheduled symposium during Pittcon 2018, the world’s leading conference ...
(Date:10/9/2017)... ... October 09, 2017 , ... The ... medical marijuana products targeting the needs of consumers who are incorporating medical marijuana ... place in Phoenix, Arizona. , As operators of two successful Valley dispensaries, The ...
Breaking Biology Technology:
Cached News: