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Venice Lagoon research indicates rapid climate change in coastal regions

Venice Lagoon research indicates rapid climate change in coastal regions
2012-09-28
(Press-News.org)

Research undertaken by the University of Southampton and its associates in Venice has revealed that the sea surface temperature (SST) in coastal regions is rising as much as ten times faster than the global average of 0.13 degrees per decade.

Researchers believe that this is partly as a result of a process known as the 'urban heat island effect'; where regions experiencing rapid industrial and urban expansion produce vast amounts of heat, making the area warmer than its surroundings.

Professor Carl Amos of Ocean and Earth Sciences at the University of Southampton, will be making a speech at the Estuarine & Coastal Sciences Association's Research & Management of Transitional Waters international symposium, in Lithuania tomorrow (Thursday 27 September). He explains: "The urban heat island effect is a little considered problem with extreme consequences. Take London for example; the air temperature in the capital and the SST of the Thames is always warmer than it is in the rest of the UK. Similarly, in South Korea, an area which has seen rapid industrial expansion, the SST is rising at a rate of 0.26 degrees per decade – significantly higher than the global average. Two thirds of this rise is explained by local air temperature, which is largely driven by the urban heat island effect."

The world's coastal zone occupies 18 per cent of the world's land mass and it is estimated that 1.6 billion people live in these regions world-wide. The coastal population density is three times the global average and this population is expected to increase 30 per cent by 2025, with trade and infrastructure at the coasts also increasing steadily. Research suggests that in coastal regions of high urban development, human activity is directly warming adjacent coastal waters and that this contribution to global warming at the coastal zones is equal to, or greater than, other factors such as greenhouse gasses.

Professor Amos, who is based at the National Oceanography Centre Southampton (NOCS) says: "The Marine Climate Change Impacts Partnership Report of 2006 stated that the capacity to define and predict long-term coastal changes due to human causes is 'unknown' and confidence in results is 'low'. This is a major barrier to planning for inevitable changes in coastal SST. Most of these changes at coastlines are caused by human activity, but as it is complex to consider these factors accurately, the official International Panel for Climate Change (IPCC) figures do not take these coastal 'anomalies' into account."

In Venice, with 22 million visitors annually and tourism a year-round source of income, the economy remains critically dependent on the city maintaining its status as one of the world's most desirable destinations. Southampton's research in Venice has highlighted the tension between tourism's economic benefits and environmental repercussions. Analyses of seawater temperature trends in the Venice Lagoon have suggested an increase during winter months ten times greater than that predicted globally by the IPCC – a result directly linked to tourism.

Thousands of jobs and the Venetian economy rely on the survival of the fishing industry, which is dependent on the temperature of the coastal seawater in the Venice Lagoon. A rise in SST in the coastal zone reduces oxygen levels and displaces marine fish and associated nursery grounds, causing catastrophic fish kill phenomena. This research has helped predict the viability of clam fisheries and aquaculture habitats that serve the restaurant trade that caters for millions of tourists every year.

Professor Amos says: "The findings in Venice are the result of a 15 year partnership with the city, which are of great importance and have worldwide applications. Massive urbanisation of the coastal zones means urban heat islands represent an acute problem, particularly for the fishing industry and also for the maintenance of coastal infrastructure. The Thames, like the Venice Lagoon, is a major contributor to and casualty of the urban heat island effect. The consequences of the urban heat island effect need addressing urgently to secure the future of our coastal habitats."

INFORMATION:

Notes for editors:

1. The University of Southampton's associates in the work at the Venice Lagoon are the Kuwait Institute for Scientific Research, the West Vancouver Marine Laboratory, ISMAR Venice, and the National Water Research Institute of Canada

2. For more information on the Estuarine & Coastal Sciences Association's Research & Management of Transitional Waters international symposium, visit http://corpi.ku.lt/ecsa2012/?page_id=2.

3. The University of Southampton is celebrating its 60th anniversary during 2012.

Her Majesty Queen Elizabeth II, granted the Royal Charter that enabled the University of Southampton to award its own degrees in the early weeks of her reign in 1952. In the six decades to follow, Southampton has risen to become one of the leading universities in the UK with a global reputation for innovation through academic excellence and world-leading research.

This year, the University's reputation continues to grow with the recent awarding of a Queen's Anniversary Prize for Higher and Further Education in recognition of Southampton's long-standing expertise in performance sports engineering.

To find out more visit www.southampton.ac.uk/60

4. The National Oceanography Centre (NOC) works in partnership with the UK marine research community to deliver integrated marine science and technology from the coast to the deep ocean.

It was formed in April 2010 by bringing together the Natural Environment Research Council (NERC)-owned Proudman Oceanographic Laboratory in Liverpool and NERC-managed activity at the National Oceanography Centre, Southampton into a single institution.

With its partners, the NOC delivers the research capability needed to tackle the big environmental issues facing our planet. Research priorities include the oceans' role in climate, sea level change and the future of the Arctic Ocean.

The University of Southampton and the University of Liverpool are hosting partners of NOC. Ocean and Earth Science at the University of Southampton shares a waterfront campus with the NERC-operated elements of the NOC, and a close collaborative relationship is maintained at both Southampton and Liverpool.

For further information contact:

Charlotte Woods, Media Relations, University of Southampton, Tel: + 44 (0)23 8059 2128, email: c.woods@soton.ac.uk www.soton.ac.uk/mediacentre/ Follow us on twitter: http://twitter.com/unisouthampton Like us on Facebook: www.facebook.com/unisouthampton

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Venice Lagoon research indicates rapid climate change in coastal regions

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[Press-News.org] Venice Lagoon research indicates rapid climate change in coastal regions