Navigation Links
CSIRO imagery shows Outer Great Barrier Reef at risk from river plumes

A stunning series of satellite imagery of Australia's Great Barrier Reef released by the CSIRO shows for the first time visual confirmation of the theory that sediment plumes travel to the outer reef, and beyond.

The remotely sensed images, taken from February 9 to 13 this year, challenge conventional thought that sediment travelling from our river systems into the GBR is captured by the longshore current and travels no more than 10 to 15km offshore, affecting only the inner Great Barrier Reef Lagoon and the inner reef corals.

Images captured by CSIRO show large plumes of terrestrial material following unconventional patterns and travelling quite fast as far as 65 to 130km, to the outer reef and, in some instances, travelling along the outer reef and re-entering the reef.

The plumes are the result of heavy rainfalls in northern QLD around late January to early February 2007, with the resulting flood waters carrying a larger sediment load than during regular rainfall and river flow. As such floods have not occurred for a while the accumulated material in the creeks ands rivers coupled with increased sediment runoff from the land is causing a significant transport of terrestrial material to all areas of the affected reefs and reef waters.

Managers of the GBR have long been examining the effects of run-off of sediments, including pesticides, herbicides and fertilizers, on the reef corals.

The images challenge the traditional school of hydrological modelling, which says sediment plume movement in the mid to northern GBR usually go north and never directly flow to the outer reef is spared the direct effects of such river floods.

"A re-think is needed now that we know where flood plumes go," says CSIRO scientist Arnold Dekker, "and what this means as organic micropollutants may be travelling to parts of the reef scientists hadn't thought to look before."

The images were taken from NASA's MODIS sate llite by GeoScience Australia's Alice Springs site for a new product being developed by the Wealth from Oceans Flagship to track coastal and ocean events in real-time, building on the technology behind the successful SENTINEL bushfire tracking system.

While extreme coastal events have been captured by remote sensing before, this is the first time they can be seen and analysed straight after the event as there are now more satellites imaging the Earth and CSIRO has invested in fast information delivery systems.

The images answer many of the questions posed in the article 'Cattle, Crops and Coral: Flood Plumes and the Great Barrier Reef' from the 2006 NASA EOS Annual Report.


'"/>

Source:CSIRO Australia


Related biology news :

1. Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer
2. “Nano-scissors?laser shows precise surgical capability
3. Clam embryo study shows pollutant mixture adversely affects nerve cell development
4. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
5. Study shows nanoshells ideal as chemical nanosensors
6. Gene vaccine for Alzheimers disease shows promising results
7. Flocking together: Study shows how animal groups find their way
8. New drug shows promise as powerful anticancer agent
9. Loves all in the brain: fMRI study shows strong, lateralized reward, not sex, drive
10. Test for early detection of prostate cancer shows promise
11. Mouse gene shows new mechanism behind cardiac infarction in man
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/12/2016)... DALLAS , May 12, 2016 ... has just published the overview results from the Q1 ... of the recent wave was consumers, receptivity to a ... wearables data with a health insurance company. ... choose to share," says Michael LaColla , CEO ...
(Date:5/3/2016)...  Neurotechnology, a provider of high-precision biometric identification ... Identification System (ABIS) , a complete system for ... can process multiple complex biometric transactions with high ... face or iris biometrics. It leverages the core ... MegaMatcher Accelerator , which have been used in ...
(Date:4/28/2016)... , April 28, 2016 First quarter ... (139.9), up 966% compared with the first quarter of 2015 ... totaled SEK 589.1 M (loss: 18.8) and the operating margin was ... (loss: 0.32) Cash flow from operations was SEK 249.9 ... 2016 revenue guidance is unchanged, SEK 7,000-8,500 M. The ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... NC (PRWEB) , ... June 27, 2016 , ... ... mission to bring innovative medical technologies, services and solutions to the healthcare market. ... and implementation of various distribution, manufacturing, sales and marketing strategies that are necessary ...
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks , ... industrial engineering, was today awarded as one of ... of the world,s most innovative companies. Ginkgo Bioworks ... for the real world in the nutrition, health ... work directly with customers including Fortune 500 companies ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers ... 5000 and the 6000i models are higher end machines that use the more unconventional ... spectrophotometer’s light beam from the bottom of the cuvette holder. , FireflySci has ...
(Date:6/23/2016)... ... June 23, 2016 , ... UAS ... the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The company, ... proud to add Target to its list of well-respected retailers. This list includes ...
Breaking Biology Technology: