Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Tracing iron in the North Pacific

03.12.2018

The micronutrient iron (Fe) is recognized as a key factor in controlling oceanic primary productivity, and subsequently impacting the carbon cycle and marine ecosystem. The high-latitude area of the North Pacific is one of the three main high-nutrient and low-chlorophyll (HNLC) regions on Earth. Also, the growth of phytoplankton is limited by the availability of Fe. Climate change, human activities and ocean acidification are expected to influence the availability and transport of Fe in the ocean. Therefore, it is of great importance to study the Fe cycle and make reliable predictions for the future.

"As a result of human activity, the amount and composition of Fe induced by atmospheric decomposition has changed and affected the ocean. After depositing into the ocean, the distribution and transport of Fe is mainly determined by physical processes, e.g., mixing and upwelling.


This is the iron cycle in the ocean.

Credit: Yuntao Wang

So, clarifying the sources and transport of biologically available Fe are key scientific questions for understanding the marine ecosystem," explains Dr. Fei Chai, a researcher at the Second Institute of Oceanography and corresponding author of a project report recently published in Atmospheric and Oceanic Science Letters.

"The biological availability of Fe in the ocean also depends on the amount and strength of organic complex ligands. The spatial distribution of Fe-binding ligands is highly variable, with more ligands found in the Northwest Pacific than Northeast Pacific.

Also, the strength of ligands is mainly affected by the pH of water, with lower pH reducing the strength of ligands and decreasing the Fe uptake rate of diatoms. Therefore, under the influence of ocean acidification, the distribution and strength of Fe-binding ligands will change considerably, with subsequent impacts on the ecosystem of the North Pacific," adds Dr. Chai.

Dr. Fei Chai and his team, from the Second Institute of Oceanography, will develop and utilize a coupled physical-biological-Fe model, named ROMS-CoSiNE-Fe, in the North Pacific.

The model will incorporate the Fe cycle for the upper North Pacific and make predictions of primary production and marine ecosystems in the future. The project is funded by the National Natural Science Foundation of China from 2018 to 2022.

"These studies will explore the sources and transport of biologically available Fe in the HNLC region. The results can give scientific advice to stakeholders on the feasibility of conducting ocean Fe fertilization," says Dr. Chai, "In the future, we hope to better understand the rate of Fe uptake by phytoplankton and make predictions of changes in the marine ecosystem of the North Pacific."

Media Contact

Ms. Zheng Lin
jennylin@mail.iap.ac.cn
86-108-299-5053

 @aasjournal

http://english.iap.cas.cn/ 

Ms. Zheng Lin | EurekAlert!
Further information:
https://doi.org/10.1080/16742834.2019.1545513
http://dx.doi.org/10.1080/16742834.2019.1545513

More articles from Earth Sciences:

nachricht Tiny satellites reveal water dynamics in thousands of northern lakes
15.02.2019 | Brown University

nachricht Artificial Intelligence to boost Earth system science
14.02.2019 | Max-Planck-Institut für Biogeochemie

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Light from a roll – hybrid OLED creates innovative and functional luminous surfaces

Up to now, OLEDs have been used exclusively as a novel lighting technology for use in luminaires and lamps. However, flexible organic technology can offer much more: as an active lighting surface, it can be combined with a wide variety of materials, not just to modify but to revolutionize the functionality and design of countless existing products. To exemplify this, the Fraunhofer FEP together with the company EMDE development of light GmbH will be presenting hybrid flexible OLEDs integrated into textile designs within the EU-funded project PI-SCALE for the first time at LOPEC (March 19-21, 2019 in Munich, Germany) as examples of some of the many possible applications.

The Fraunhofer FEP, a provider of research and development services in the field of organic electronics, has long been involved in the development of...

Im Focus: Regensburg physicists watch electron transfer in a single molecule

For the first time, an international team of scientists based in Regensburg, Germany, has recorded the orbitals of single molecules in different charge states in a novel type of microscopy. The research findings are published under the title “Mapping orbital changes upon electron transfer with tunneling microscopy on insulators” in the prestigious journal “Nature”.

The building blocks of matter surrounding us are atoms and molecules. The properties of that matter, however, are often not set by these building blocks...

Im Focus: University of Konstanz gains new insights into the recent development of the human immune system

Scientists at the University of Konstanz identify fierce competition between the human immune system and bacterial pathogens

Cell biologists from the University of Konstanz shed light on a recent evolutionary process in the human immune system and publish their findings in the...

Im Focus: Transformation through Light

Laser physicists have taken snapshots of carbon molecules C₆₀ showing how they transform in intense infrared light

When carbon molecules C₆₀ are exposed to an intense infrared light, they change their ball-like structure to a more elongated version. This has now been...

Im Focus: Famous “sandpile model” shown to move like a traveling sand dune

Researchers at IST Austria find new property of important physical model. Results published in PNAS

The so-called Abelian sandpile model has been studied by scientists for more than 30 years to better understand a physical phenomenon called self-organized...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Global Legal Hackathon at HAW Hamburg

11.02.2019 | Event News

The world of quantum chemistry meets in Heidelberg

30.01.2019 | Event News

Our digital society in 2040

16.01.2019 | Event News

 
Latest News

Cell division in plants: How cell walls are assembled

20.02.2019 | Life Sciences

Novel coating enables hip implants to grow in better and prevents aseptic inflammation

20.02.2019 | Medical Engineering

Yin and Yang during synapse maturation in young brains

20.02.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>