Featured Research

from universities, journals, and other organizations

Information about noise, flows, hydrogen sulphide in the Baltic Sea

Date:
October 18, 2013
Source:
Finnish Environment Institute (SYKE)
Summary:
The first devices for measuring underwater noise have been anchored this week to the bottom of the Baltic Sea on the coast of Finland. The researchers of six countries bordering the Baltic Sea who participate in the BIAS project installed noise-measuring hydrophones on the southern side of the Jussarö lighthouse near Tvärminne and in the Gulf of Finland between Helsinki and Tallinn.

The hydrophones are installed in the Baltic Sea.
Credit: Jukka Pajala

The first devices for measuring underwater noise have been anchored this week to the bottom of the Baltic Sea on the coast of Finland. The researchers of six countries bordering the Baltic Sea who participate in the BIAS project installed noise-measuring hydrophones on the southern side of the Jussarö lighthouse near Tvärminne and in the Gulf of Finland between Helsinki and Tallinn.

"Noise meters installed on the seabed gather information about the world of sound underwater until the beginning of 2015," states the Finnish Environment Institute SYKE's Senior Adviser Jukka Pajala coordinating the BIAS project. "The project installs a total of 40 hydrophones in the Baltic Sea."

"The hydrophones are to be taken up at the beginning of 2015 to find out what kind of noise the animals of the Baltic Sea are exposed to," says Pajala. "Noise perturbs fish and sea mammals especially."

The devices were installed to the sea from SYKES's marine research vessel Aranda. During the same journey, three flow-meters of the Finnish Meteorological Institute were also hauled up. They had been measuring water movements on the Gulf of Finland from the middle of April.

"For the next half-year period, new meters were installed in the same places, thus giving us a year-round picture about the currents. The meters produce data for the estimation and development of calculated flow models, and the observations are also part of the Gulf of Finland 2014 research," points out the tour leader, Riikka Hietala, Head of Group from the Finnish Meteorological Institute.

A new device to measure hydrogen sulphide

For the first time, SYKE's researchers employed a new electronic hydrogen sulphide meter on the Baltic Sea. The new device gives more accurate information about the water conditions close to the bottom.

"With the help of our new hydrogen sulphide and pH measurement device that can be moved in water, we are able to see, more accurately than before, how hydrogen sulphide is distributed in deep water," Senior Researcher Harri Kankaanpää from SYKE's Marine Research Centre points out.

Hydrogen sulphide is a widespread, extremely toxic compound in the Baltic Sea's seabed environment that is devoid of oxygen.

During the journey, it was noted that, for the last few weeks, more salty water had entered from the Baltic Sea's basin to the deep parts of the middle area of the Gulf of Finland. Near the seabed, new saltier water devoid of oxygen further weakens benthic organisms. This kind of "slopping" of water to and fro in the vicinity of the seabed on the Gulf of Finland is fairly normal, and the situation at the seabed can change quite rapidly.


Story Source:

The above story is based on materials provided by Finnish Environment Institute (SYKE). Note: Materials may be edited for content and length.


Cite This Page:

Finnish Environment Institute (SYKE). "Information about noise, flows, hydrogen sulphide in the Baltic Sea." ScienceDaily. ScienceDaily, 18 October 2013. <www.sciencedaily.com/releases/2013/10/131018084455.htm>.
Finnish Environment Institute (SYKE). (2013, October 18). Information about noise, flows, hydrogen sulphide in the Baltic Sea. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2013/10/131018084455.htm
Finnish Environment Institute (SYKE). "Information about noise, flows, hydrogen sulphide in the Baltic Sea." ScienceDaily. www.sciencedaily.com/releases/2013/10/131018084455.htm (accessed September 18, 2014).

Share This



More Earth & Climate News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) — Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) — A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Researchers Explore Shipwrecks Off Calif. Coast

Researchers Explore Shipwrecks Off Calif. Coast

AP (Sep. 16, 2014) — Federal researchers are exploring more than a dozen underwater sites where they believe ships sank in the treacherous waters west of San Francisco in the decades following the Gold Rush. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Isolated N. Korea Asks For International Help With Volcano

Isolated N. Korea Asks For International Help With Volcano

Newsy (Sep. 16, 2014) — Mount Paektu volcano in North Korea is showing signs of life and there's not much known about it. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins