sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Leisure sailors wanted to help track effects of climate change
Leisure sailors wanted to help track effects of climate change


'Secchi disk - simple to make at home. Watch the video below for explanation'    .

This is your chance to do something valuable while you sail. As a leisure sailor you and other seafarers are being encouraged to take part in a unique global study to record the effects of climate change, using a simple piece of equipment you can make yourself at home and an iPhone or Android free app.

Secchi free app for iPhone or Android -  .. .  

To explain, the marine phytoplankton account for approximately 50% of all photosynthesis on Earth and, through the plankton food web that they support, they both underpin the marine food chain and play a central role in the global carbon cycle strongly influencing the Earth’s climate.

Living at the surface of the sea the phytoplankton are particularly sensitive to changes in sea surface temperature. A recent study of global phytoplankton abundance over the last century concluded that global phytoplankton concentrations have declined due to rising sea surface temperatures as a consequence of current climate change.

We need to know much more about these changes and you can help by making a simple piece of scientific equipment called a Secchi Disk and using the Secchi App.

The public science project will measure the amount of phytoplankton, minute organisms at the very start of the marine food chain, currently residing in the world’s oceans. Scientists fear the population of the microscopic beings is in decline due to rising sea temperatures and, if true, that could have consequences for every aspect of marine life.

The project is being spearheaded by Plymouth University’s Marine Institute, which hopes to build a map of the oceans that charts the seasonal and annual changes of phytoplankton from now and into the future.

Plankton biologist Dr Richard Kirby, who is leading the study, said: 'As the phytoplankton live at the surface of the sea they are being affected by rising sea temperatures due to climate change. A scientific paper published last year suggested the ocean's plankton population had declined by as much as 40 per cent since 1950 as sea temperatures had warmed due to climate change.

'The scientists suggested that a warming of the ocean surface may have reduced vertical mixing of the water column thereby reducing the supply of nutrients from deeper waters – in effect the input of fertiliser to the surface had lessened with effects upon phytoplankton growth.

'Their results provoked debate among marine scientists however, some who thought they saw no change, or even an increase in phytoplankton in some places. Since the phytoplankton begin the marine food chain, we need to know more about if, how, and why they are changing in order to understand the effects on the ocean's biology.'

To check the levels of phytoplankton in our oceans, marine experts have developed a free smart phone app for sailors and fishermen to use wherever they are in the world. Because the phytoplankton – each thinner than a strand of human hair – exist at the sea’s surface, mariners can carry out a simple experiment using an easy to make ‘Secchi Disk’.

The Secchi Disk, simple to make at home:

Attached to a measuring tape, the Secchi Disk is lowered over the side of a boat and the depth at which it disappears from sight estimates the amount of phytoplankton in the sea. This depth can then be uploaded to a database using the Secchi app.

Dr Kirby added: 'The Secchi Disks are still used by marine scientists to study phytoplankton but there are too few scientists to survey the world's oceans as well as we would wish. This app enables seafarers around the world to take part in a science project and if we can just get a small percentage of the global population of sailors involved, we can generate a database that will help us understand how life in the oceans is changing. It would help us learn much more about these important organisms at a crucial time when their habitat is altering due to climate change.'

Secchi screen menu -  .. .  
The Secchi App on iPhone or Android:
The Secchi app has been developed by Dr Nicholas Outram and Dr Nigel Barlow, from Plymouth University’s School of Computing and Mathematics, and the database will be maintained by Pixalytics Ltd, a company founded by Dr Sam Lavender, an Honorary Reader at the University.

A major design consideration of the apps is that they have to be able to operate in places where the phone has no Internet connection. Participants record as many Secchi readings as they like, and these are stored as 'pending readings' on the phone. Exactly how many pending readings can be stored depends on the capabilities of the phone, but the number is very large. These pending readings can be uploaded at a later date when an Internet connection is available.

In addition, the app has an easy to follow workflow to minimise errors. The participant’s location is taken from the phone’s GPS, eliminating transcription errors. The user interface has been designed to be clean, intuitive and uncluttered, and in particular to be a UI that works on a boat at sea. Small and fussy layouts are not used, and the 'depth disk' uses a logarithmic scale to enable shallow depths to be entered quickly and accurately.

The free app is called Secchi after Father Pietro Angelo Secchi, an astronomer who invented the disk device in 1865 to measure water turbidity in the Mediterranean. You can find out more about the project at www.secchidisk.org.

To see how to make and use a simple Secchi disk, watch the video below:



About the Ocean Cruising Club, who kindly provided the information for this story:
The Ocean Cruising Club is an international club for cruisers and is well worth joining, particularly for roving cruising sailors. The distinctive blue and yellow burgee with a stylized Flying Fish is a welcome and respected sight in any anchorage. The Club, known affectionately as the OCC, exists to promote long-distance cruising in all its forms. It has no premises, regarding the oceans of the world as its clubhouse. However, it enjoys visitors' rights with a number of major clubs world-wide. For more information go to its website.


by Daria Blackwell, Ocean Cruising Club/Sail-World

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=109561

9:31 PM Thu 16 May 2013GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







News - USA and the World











































Big Boat Series - It's not the size, it's the length by Erik Simonson, Pressure-Drop.US,




















470 Men and Women Worlds - Champs take over leaderboard by 470 International Association Class,




America's Cup: Oracle's Larry Ellison to step down as CEO
Classic Yacht Regatta - Sonny takes top classic prize
ISAF Sailing Worlds, Santander - Buckingham finishes with career best
ISAF Sailing Worlds, Santander - Rio 2016 RS:X spots claimed
ISAF Sailing Worlds - Leaderboards shaping up in Santander + Video
ISAF Sailing Worlds, Santander - Giles Scott continues to extend lead
ISAF Sailing Worlds, Santander - Day 7 images by Sailing Energy
ISAF Sailing Worlds - Laser and Radial winner images by Jesus Renedo
ISAF Sailing Worlds, Santander - Medal Race images by Sail-World.com
ISAF Sailing Worlds - Dutch dominate Laser and Radial in Santander
Royal Cup Marina Ibiza - Quantum Racing more than doubles overall lead
J/24 World Championship - Excitement builds for Newport racing
Volvo Ocean Race - Seb Marsset joins Team Alvimedica
Fall Seamanship training opportunities at New York Yacht Club
Rolex Big Boat Series: More images from San Francisco - Final Day
AWT Hatteras Wave Jam action commences on day 3
Rolex Big Boat Series: Images from San Francisco - Final Day
ISAF Sailing World Championships - Watch medal races live here
Hobie 16 Open North American Championships and Pan Am Games qualifier
ISAF Sailing World Championship - Videos from Santander
ISAF Sailing Worlds: Buckingham into Medal Race, 470's stay consistent   
470 Men and Women Worlds - Vadlau and Ogar into pole position   
2014 Chicago Match Cup - Defending champion on top   
ISAF Sailing Worlds, Santander - Strong competition for RS:X fleets   
ISAF Sailing Worlds, Santander - Big breeze on day 6 + Video   
ISAF Sailing Worlds, Santander - Buckingham into Laser Medal Race   
U.S. Multihull Championship - Hobie Alter Trophy to be decided   
ISAF Sailing Worlds - The kind of form most sailors only dream about   
Royal Cup Marina Ibiza - Quantum Racing ahead of target   
ISAF Worlds Santander - 19 Rio 2016 Laser Radial spots awarded   
Santander 2014 ISAF Worlds - 21 broadcasters to take live coverage   
Rolex Swan Cup - Looking forward to the next 30 years   
America’s Cup: The Future is foiling – AC45s to be modified   
Volvo Ocean Race: Win a stopover trip by designing an ECsix T-Shirt   
Red Bull 49erFX: On the eve of the Worlds in Santander   
America's Cup: Ben Ainslie Racing launches partnership with Yamaha   
2014 Chicago Match Cup - Starts tomorrow   
Rio 2016 Daylight the issue for Olympic sailing regatta   
ISAF Sailing World Championships - USA 470's and Lasers battle at top   
ISAF Sailing World Championships - Santander - Day 5 video highlights   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL WAS US
LocalAds   DE  ES  FR  IT