Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ocean dye to help Rutgers scientists trace Hudson River’s path miles into the Atlantic

28.04.2004


Shipboard marine scientists from Rutgers, The State University of New Jersey, will release a nontoxic red dye into the Atlantic Ocean off New Jersey during the week of May 2 to help reveal the contents and fate of Hudson River water after it joins the Atlantic.


The dye release is the first of three experiments in Rutgers’ ongoing study of the Hudson River Plume – the mix of river water and substances that flow into the ocean at a rate of 500 billion gallons per day. Preliminary studies indicate that the plume tends to sweep southward along the New Jersey coast.

The exact location and time of the dye release will be determined by the position of the plume and other conditions. Robert J. Chant, professor of physical oceanography with Rutgers’ Institute of Marine and Coastal Sciences (IMCS), said he hopes to release the dye sometime Sunday or Monday in an area a few miles southeast of Sandy Hook.

The dye initially will be visible on the ocean as a red patch, perhaps a mile or more long, Chant said. "It will then disperse and gradually become invisible to the human eye, but remain detectable by our sensors. Essentially we’re tagging a piece of the ocean and following it."



Chant and a crew of fellow oceanographers plan to follow the flow of the dye on a research vessel for about five days, and possibly 100 or miles more. Throughout the voyage, they will be testing the water to increase their knowledge about where the plume goes and what it contains.

A live streaming video and audio feed of experiment activities and scientists’ commentary during the cruise will available online at http://marine.rutgers.edu/cool/latte. IMCS will take aerial photos of the dye patch and then post and later archive the images online.

The five-year study, called the Lagrangian Transport and Transformation Experiment (LaTTE), also involves the ongoing use of unmanned submarines, satellites, coastal radar and other technologies. It is funded through a $4.2 million grant from the National Science Foundation.

As the study progresses, Rutgers scientists will add the data to computer models for predicting plume behavior and content under a wide range of conditions. Such information will be useful, for example, in predicting potentially dangerous algae blooms along the coast and making decisions about sewage disposal.

Chant is the principal investigator on the study. He is working along with fellow IMCS scientists Scott M. Glenn, Oscar Schofield and John L. Wilkin, and John R. Reinfelder of Rutgers’ environmental sciences department.

Facts
  • The dye consists of about 100 gallons of Rhodamine WT, a nontoxic liquid red dye commonly used in water-tracing studies. It is detected optically by monitoring a characteristic reflection. Rhodamine can be detected down to 10 parts per trillion, or the equivalent of 1/50th of an ounce dropped in an Olympic-size swimming pool.

  • While following the dye patches, researchers will run many tests to evaluate how nitrogen, lead, cadmium, mercury and other substances are transported by the plume at different depths and under different conditions. They will study microscopic phytoplankton and zooplankton, and research how metals and nutrients enter the base of the food chain.

  • "Lagrangian" in the title of the study comes from Joseph-Louis Lagrange, an 18th century French mathematician who developed formulas for studying the motion of fluids while following their flow.

  • The LaTTE acronym will have special meaning for coffee lovers. One of the chemicals to be monitored in the Hudson River Plume is caffeine. It passes though sewage treatment plants unchanged, and because it has no oceanic source, it can be used as an additional tracer.

  • Shipboard testing will provide real-time results, allowing scientists aboard the vessel to produce computer images of the Hudson River Plume as they travel.

  • The model will evolve as test cruises continue through 2006. Analysis of the comprehensive plume model is expected to be completed by 2008.

  • Computer modeling in LaTTE will tackle such complex issues as turbulent mixing and photosynthesis in microscopic ocean plants. The rotation of the earth will figure in the model because it causes ocean water in the northern hemisphere to turn to the right. This phenomenon, called the Coriolis effect, drives the plume up against the New Jersey coast.

  • In previous testing, water from the Hudson River Plume was detected in the ocean as far south as Cape May.

Joseph Blumberg | EurekAlert!
Further information:
http://www.rutgers.edu/

More articles from Earth Sciences:

nachricht Hundreds of bubble streams link biology, seismology off Washington's coast
22.03.2019 | University of Washington

nachricht Atmospheric scientists reveal the effect of sea-ice loss on Arctic warming
11.03.2019 | Institute of Atmospheric Physics, Chinese Academy of Sciences

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: The taming of the light screw

DESY and MPSD scientists create high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might find intriguing applications in petahertz electronics and for spectroscopic studies of novel quantum materials.

The nonlinear process of high-order harmonic generation (HHG) in gases is one of the cornerstones of attosecond science (an attosecond is a billionth of a...

Im Focus: Magnetic micro-boats

Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.

The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...

Im Focus: Self-healing coating made of corn starch makes small scratches disappear through heat

Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.

Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...

Im Focus: Stellar cartography

The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.

A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...

Im Focus: Heading towards a tsunami of light

Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.

"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

International Modelica Conference with 330 visitors from 21 countries at OTH Regensburg

11.03.2019 | Event News

Selection Completed: 580 Young Scientists from 88 Countries at the Lindau Nobel Laureate Meeting

01.03.2019 | Event News

LightMAT 2019 – 3rd International Conference on Light Materials – Science and Technology

28.02.2019 | Event News

 
Latest News

Solving the efficiency of Gram-negative bacteria

22.03.2019 | Life Sciences

Bacteria bide their time when antibiotics attack

22.03.2019 | Life Sciences

Open source software helps researchers extract key insights from huge sensor datasets

22.03.2019 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>