Navigation Links
Dust in the wind drove iron fertilization during ice age
Date:3/21/2014

phosphorus in abundance, allowing plankton to be fertilized by iron without running low on these necessary nutrients.

The research confirms Martin's hypothesis, said Daniel Sigman, Princeton's Dusenbury Professor of Geological and Geophysical Sciences, and a co-leader of the study. "I was an undergraduate when Martin published his 'ice age iron hypothesis,'" he said. "I remember being captivated by it, as was everyone else at the time. But I also remember thinking that Martin would have to be the luckiest person in the world to pose such a simple, beautiful explanation for the ice age CO2 paradox and then turn out to be right about it."

Previous efforts to test Martin's hypothesis established a strong correlation of cold climate, high dust and productivity in the Subantarctic region, a band of ocean encircling the globe between roughly 40 and 50 degrees south latitude that lies in the path of the winds that blow off South America, South Africa and Australia. However, it was not clear whether the productivity was due to iron fertilization or the northward shift of a zone of naturally occurring productivity that today lies to the south of the Subantarctic. This uncertainty was made more acute by the finding that ice age productivity was lower in the Antarctic Ocean, which lies south of the Subantarctic region.

To settle the matter, the research groups of Sigman at Princeton and Gerald Haug and Tim Eglinton at ETH Zurich teamed up to use a new method developed at Princeton. They analyzed fossils found in deep sea sediment deposited during the last ice age in the Subantarctic region with the goal of reconstructing past changes in the nitrogen concentration of surface waters and combining the results with side-by-side measurements of dust-borne iron and productivity. If the dust-borne iron fertilization hypothesis was correct, then nitrogen would have been more completely consumed by the plankton, leading to lower residual nitrogen concentrati
'/>"/>

Contact: Catherine Zandonella
czandone@princeton.edu
609-258-0541
Princeton University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Big-mouthed babies drove the evolution of giant island snakes
2. U of M study finds fertilization destabilizes global grassland ecosystems
3. Reproductive biologists move in vitro fertilization knowledge forward
4. Low-cost in-vitro fertilization method developed at CU may help couples in developing countries
5. Insect glands may illuminate human fertilization process
6. Performing cardio- and resistance training during the same session: Does the order matter?
7. Fight or flight? Vocal cues help deer decide during mating season
8. Falcon feathers pop-up during dive
9. New study suggests choline recommendations during pregnancy may be too low
10. Low vitamin D levels during pregnancy may increase risk of severe preeclampsia
11. Cannabis during pregnancy endangers fetal brain development
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dust in the wind drove iron fertilization during ice age
(Date:9/30/2014)... HEIGHTS, Ill. (September 30, 2014) People who suffer ... can do to control their asthma besides properly taking ... a new article in the Annals of Allergy, ... American College of Allergy, Asthma and Immunology (ACAAI), asthma ... examining their lifestyle. The woman described in the Annals ...
(Date:9/29/2014)... , coupled with a high-fat diet, may cause animals to ... mBio , the online open-access journal of the American Society ... Institute of Human Nutrition Potsdam-Rehbruecke in Nuthetal observed that mice ... weight when fed a high-fat diet. Mice that did not ... consuming a high-fat diet, and mice that had C. ...
(Date:9/29/2014)... -- Plants have a symbiotic relationship with certain ... nutrients and defend against invaders an important ... vegetables. Now, scientist have discovered that plants may ... ensuring that sprouting plants are colonized from the ... Dame, presented their findings today at the 5th ...
Breaking Biology News(10 mins):Asthma symptoms kicking up? Check your exposure to air pollution 2Gut bacteria promote obesity in mice 2Plants prepackage beneficial microbes in their seeds 2
... help transform a key component of disposable cups, ... significantly reducing the environmental impact of this ubiquitous, ... scheduled to appear in the April 1 issue ... Science & Technology . , The microbes, a ...
... Anthropology Jeffrey H. Schwartz and University of Salerno Professor ... New Anatomist journal, shows that the emerging understanding of ... evolution, originally explained in his seminal work, Sudden Origins: ... & Sons, 2000). , In that book, Schwartz hearkens ...
... in less than 0.2% of the 3-billion-base human genome ... human disease. Today, researchers from the Wellcome Trust Sanger ... Research, together with international colleagues report in PLoS Genetics ... well as genes that are unchanged in recent human ...
Cached Biology News:Microbes convert 'Styrofoam? into biodegradable plastic 2Pitt professor's theory of evolution gets boost from cell research 2Pitt professor's theory of evolution gets boost from cell research 3Researchers map of genetic variations implicated in disease 2Researchers map of genetic variations implicated in disease 3
(Date:9/30/2014)... , Sept. 30, 2014 Pacific Northwest ... Summary Global Markets Direct,s, ,Pacific Northwest ... provides an overview of the Pacific Northwest Biotechnology, ... report provides comprehensive information on the current therapeutic ... with comparative analysis at various stages, therapeutics assessment ...
(Date:9/30/2014)... September 30, 2014 Shimadzu Scientific ... an easy-to-use and highly precise tool for measuring ... considerable elongation. With 1000-mm maximum movement distance, the ... for a gauge length of 10 mm. In ... accuracy above 50-mm stroke and within +/- 100 ...
(Date:9/30/2014)... Over the last decade, the laboratory filtration market is ... increased acceptance of new filtration technologies in end users ... also catalyzing the growth of laboratory filtration market. , ... at a strong CAGR during the forecast period of ... by 2019. The market is mainly driven by the ...
(Date:9/30/2014)... California (PRWEB) September 30, 2014 ... the level of each type of cholesterol carrier or ... the presence of excessive cholesterol levels in the body, ... precursor condition to heart attack and other cardiovascular disorders. ... worldwide, therefore testing for cholesterol levels on a regular ...
Breaking Biology Technology:Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 2Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 3Shimadzu’s New Long-Travel Extensometer Increases Precision for Soft Material Testing 2Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 2Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 3Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 4Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 5Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 2Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 3Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 4
... All amounts are in US dollarsQUEBEC CITY, March ... AEZS ; TSX: AEZ), a global biopharmaceutical ... announced the signing of a development, commercialization and ... SNY ) for the development, registration and ...
... as buckyballs may be able to keep the nation,s ... prevent arteries from clogging up. , Engineers at Duke ... bacteria and other microorganisms to accumulate on the membranes ... leads the researchers to believe that coating pipes and ...
... OMAHA, Neb., March 5 Transgenomic, Inc. (OTC ... announced today its Molecular Laboratory has received notification ... offering its services in the state. Transgenomic ... including Mitochondrial Disorders, Oncology and Hematology, Molecular Pathology ...
Cached Biology Technology:AEterna Zentaris and Sanofi-Aventis Sign a Development, Commercialization and Licensing Agreement for Cetrorelix in Benign Prostatic Hyperplasia 2AEterna Zentaris and Sanofi-Aventis Sign a Development, Commercialization and Licensing Agreement for Cetrorelix in Benign Prostatic Hyperplasia 3AEterna Zentaris and Sanofi-Aventis Sign a Development, Commercialization and Licensing Agreement for Cetrorelix in Benign Prostatic Hyperplasia 4AEterna Zentaris and Sanofi-Aventis Sign a Development, Commercialization and Licensing Agreement for Cetrorelix in Benign Prostatic Hyperplasia 5Buckyballs could keep water systems flowing 2Buckyballs could keep water systems flowing 3Transgenomic Awarded Clinical Laboratory Certification in California 2Transgenomic Awarded Clinical Laboratory Certification in California 3
MOUSE ANTI PROTEIN KINASE C BETA 2 Immunogen: Protein kinase C beta 2...
SHEEP ANTI DEHYDROEPIANDROSTERONE...
This issue concentrated on the purification of proteins for specific purposes (i.e. large-scale purification, purification for therapeutic use, etc.)...
Edited by D.M. Gersten (1996) Provides comprehensive descriptions of the techniques available for analytical gel electrophoresis of proteins and offers clear step-by-step protocols for all of the m...
Biology Products: