Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA sees Gonzalo affect Bermuda's ocean sediment: Stirred, not shaken

22.10.2014

NASA's Aqua and Terra satellites captured before and after images of Bermuda and surrounding waters before and after Hurricane Gonzalo struck the island on Oct. 17. The images revealed how Gonzalo stirred up the sediment from the ocean bottom.

The MODIS instrument or Moderate Resolution Imaging Spectroradiometer that flies aboard NASA's Aqua and Terra satellites provided imagery of Bermuda and the stirred sediment.


This is comparison of NASA satellite imagery before (Oct. 4) and after (Oct. 19) Hurricane Gonzalo passed shows the sediment stirred up (green, blue).

Credit: NASA Goddard MODIS Rapid Response Team

In a comparison of imagery before and after Hurricane Gonzalo passed, the after image showed sediment streaming east and south of Bermuda.

The MODIS instrument aboard NASA's Aqua satellite captured a "before" look of Bermuda on Oct. 4 at 17:20 UTC (1:20 p.m. EDT). The MODIS instrument aboard NASA's Terra satellite captured the "after" image from Oct. 19 at 15:00 UTC (11 a.m. EDT).

Whenever a hurricane moves over an area, it stirs up sediment from the ocean bottom. In more shallow areas the mixing of sediment to the surface is more visible on satellite imagery.

Around Bermuda, the ocean is shallow. There are coral reefs and banks that can be seen under the surface when waters are clear. Bermuda's coral reefs are some of the northern-most reefs in the North Atlantic.

In the MODIS images a lighter blue area traces the outline of the shallow waters around the reef. The deeper water around it appears dark blue.

Run off of sand dirt from the island fans out in tan and light green plumes. The extra nutrients that the run-off and bottom sediment bring to the surface may be feeding surface-dwelling ocean plants, which may also color ocean waters turquoise.

As the sediment settles around Bermuda, the United Kingdom was dealing with post-tropical cyclone Gonzalo's remnants.

Gonzalo's remnants were bringing heavy rains and gusty winds to much of the United Kingdom on Tuesday, Oct. 21. The U.K. Meteorological Service forecast wind gusts between 40 and 50 mph. In some coastal areas, winds could reach 60 to 70 mph. For updated forecasts from the U.K. Met Service, visit: http://www.metoffice.gov.uk.

Rob Gutro | Eurek Alert!
Further information:
http://www.nasa.gov

More articles from Earth Sciences:

nachricht NASA sees quick development of Hurricane Dora
27.06.2017 | NASA/Goddard Space Flight Center

nachricht Collapse of the European ice sheet caused chaos
27.06.2017 | CAGE - Center for Arctic Gas Hydrate, Climate and Environment

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Touch Displays WAY-AX and WAY-DX by WayCon

27.06.2017 | Power and Electrical Engineering

Drones that drive

27.06.2017 | Information Technology

Ultra-compact phase modulators based on graphene plasmons

27.06.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>