Navigation Links
Highest ever winter water temperatures recorded
Date:8/7/2009

Tasmania's east coast is recording its highest-ever winter water temperatures of more than 13C up to 1.5C above normal due to a strengthening of an ocean current originating north of Australia.

Satellites have given oceanographers an insight into a remarkable phenomenon a significant extension of the Leeuwin Current curling around the southern tip of Tasmania and reaching as far north as St Helens.

Remote sensing specialists at CSIRO's Wealth from Oceans Flagship have been observing the current in recent days using satellite data, and ocean measurements made near Maria Island on Tasmania's east coast.

CSIRO oceanographers Katy Hill, David Griffin and George Cresswell study ocean behaviour in the Australian region. Dr Cresswell says that scientists use ocean observations from satellite, ocean instruments and research vessels such as the Marine National Facility, RV Southern Surveyor to track the currents but there are also other indicators such as tropical species reaching Tasmania.

"It's important for us to monitor these changes in the ocean, as they can have consequences for marine ecosystems, fisheries, aquaculture, coastal communities and more," Dr Cresswell says.

The Leeuwin Current forms north of Australia and flows right around the western half of the country, meeting its better known cousin, the East Australian Current (EAC), at Tasmania. The exact location of this meeting point varies both seasonally and from year-to-year, depending on how strongly each current is flowing.

Oceanographers believe the EAC has gradually been getting stronger, and the Leeuwin Current weaker. Changes in the EAC are among the most significant in the global ocean, with a continuous record of monthly measurements one of Australian oceanography's most valuable indicators for climate and environmental monitoring.

Observations of temperature, salinity and nutrients have been collected monthly just east of Maria Island since 1944, showing how the influence of both the EAC and Leeuwin Current systems varies in Tasmanian waters. As part of the Integrated Marine Observing System (IMOS), a National Reference Station mooring has been deployed at the same site, and data is now available online every 10 minutes. Monthly samples are taken by boat to measure nutrients, phytoplankton, and zooplankton (biomass and species composition).

Satellite images indicate the surface water temperature over the continental shelf current is around 13 degrees, a degree or two warmer than at this time in recent years. The EAC has been a research focus for Katy Hill since 2005 as part of her PhD in the Quantitiative Marine Science program a joint initiative of CSIRO and the University of Tasmania.

The St Helens-based Chief Executive of the Tasmanian Rock Lobster Association, Rodney Treloggen, said he was not aware of any reports of Indian Ocean species but he said fishers were concerned at what he described as a "bad year" for the industry in the south-east and east coast.

"We know the warmer waters have an impact but we're not sure how much," Mr Treloggen said.


'/>"/>

Contact: Craig Macaulay
Craig.Macaulay@csiro.au
61-036-232-5219
CSIRO Australia
Source:Eurekalert  

Related biology news :

1. UC Riverside geneticist receives highest honor from Botanical Society of America
2. Earths highest known microbial systems fueled by volcanic gases
3. Developer of advanced computing memory, father of biochemical engineering, and innovative engineering educators win highest engineering honors of 2009
4. IEEE Fellow first woman to receive highest award in engineering profession
5. Fujitsu Announces Industry Highest Capacity 2.5 Inch SATA Hard Disk Drive at 320GB(1)
6. CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness
7. Moving in for the winter toxic brown recluse spiders pose danger
8. Winter brings flu, summer brings bacterial infections
9. Even the Antarctic winter cannot protect Wilkins Ice Shelf
10. Pathway found that lets mosquitoes fatten up, slow down for winter
11. Female katydids prefer mates cool in winter and hot in summer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Highest ever winter water temperatures recorded
(Date:3/15/2016)... JERUSALEM , March 15, 2016 ... Jerusalem , the technology-transfer company of the Hebrew University, ... developer of remote sensing technology of various human biological ... funding, raising $2.0 million from private investors. ... technology, based on the detection of electromagnetic emissions from ...
(Date:3/14/2016)... Allemagne, March 14, 2016 ... - --> - Renvoi : image disponible ... --> --> DERMALOG, ... fournit de nouveaux lecteurs d,empreintes digitales pour l,enregistrement ... DERMALOG sera utilisé pour produire des cartes d,identité ...
(Date:3/11/2016)... PUNE, India , March 11, 2016 ... to a new market research report "Image Recognition Market ... by Application (Marketing and Advertising), by Deployment Type (On-Premises ... Global Forecast To 2022", published by MarketsandMarkets, the global ... in 2015 to USD 29.98 Billion by 2020, at ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... May 3, 2016  Dr. Thomas P. McHugh ... The Woodlands, Texas , now offers ... of treated fat cells in just 25-minutes, leaving a ... 90 percent of Americans report feeling bothered by excess ... reduction procedures are a growing industry. This innovative new ...
(Date:5/2/2016)... YORK , May 2, 2016 ... announces that its technology partner Mannin Research Inc. will ... Ophthalmology (ARVO), which takes place from May 1-5, 2016 ... executives will be meeting with its vendors and research ... explore business development goals and other collaborative opportunities for ...
(Date:5/2/2016)... , ... May 02, 2016 , ... ... report on the pre-launch success of their revolutionary, veterinarian-designed product for indoor cats. ... stalk, trap, and play with their food the way nature intended. NoBowls make ...
(Date:4/29/2016)... ... April 29, 2016 , ... Amendia, Inc., a ... procedures, today announced the completion of a significant transaction and partnership that positions ... customers and partners. Kohlberg & Company, L.L.C. (“Kohlberg”), a leading private equity ...
Breaking Biology Technology: