Navigation Links
Mathematical model may result in better environment measures for the Baltic

Eutrophication of the Baltic Sea has clear negative effects, such as dead bottoms and massive blooms of cyanobacteria. But high plankton production can also have positive effects on acidification. Researchers at the University of Gothenburg, Sweden, have shown that it is possible to work out the aggregate effects of various environmental measures.

"The environmental state of the Baltic Sea is affected by many different processes at the same time and on several different time scales. Mathematical models are the only tools that can determine the relative significance of such processes. I have helped develop a mathematical model for the marine systems of the Baltic Sea. Modelling tools of this type can and should make a contribution as a basis for decisions on environmental measures in the area," says Erik Gustafsson at the Department of Earth Sciences of the University of Gothenburg.

Since 1960 an average of 50 000 square kilometres of the deep water of the Baltic Sea has been characterised by a condition in which the level of oxygen is so low that higher life forms either abandon the area or suffocate. The area of oxygen-poor regions can vary significantly from year to year, but more than 100 years of measurements show that significantly better conditions prevailed overall in the deep water during the first half of the last century.

Oxygen conditions are governed both by natural processes and by human impact. Because of strong salinity stratification and limited water exchange through the narrow Danish straits, a large part of the deep water of the Baltic Sea is isolated for periods of time. At the same time, oxygen is consumed due to the decomposition of organic matter. As a result of human activities, the quantity of organic matter increased sharply during the second half of the 20th century.

"The overarching question in my thesis concerns the extent to which the deterioration in the environmental state of the Baltic Sea can be linked to changes in climate and to what extent the increased input of nutrients has influenced the situation."

Model results show that natural variations in climate are of great significance for the oxygen status of the deep water of the Baltic Sea over a time scale of decades. On the other hand, no clear effect can be observed over longer time scales. The marked deterioration in oxygen conditions in the deep water during the 20th century is instead largely due to our inputs of nutrients to the sea.

In addition to the physical, chemical and biological processes which are crucial among other things for the plankton dynamics of the area, Gustafsson has included the marine carbon system in his model.

"This means that it is now possible to calculate long-term variations in acidity in the sea. My model thus makes it possible to compare future positive effects of reduced nutrient inputs to the damping effect of eutrophication on acidification. This is an important issue, as the level of carbon dioxide in the atmosphere is expected to increase during the 21st century, and a sharply lowered pH may be of crucial significance to the ecosystem," says Gustafsson.


Contact: Erik Gustafsson
University of Gothenburg

Related biology news :

1. New mathematical model helps biologists understand how coral dies in warming waters
2. Mathematical keys to a sixth sense -- the lateral-line system
3. Tumor growth and chemo response may be predicted by mathematical model
4. Image processing and mathematical morphology in new text by NJIT professor
5. Image processing and mathematical morphology in new text by NJIT prof
6. Modeling study identifies characteristics of high elk-use areas in western Oregon, Washington
7. Computational model of swimming fish could inspire design of robots or medical prosthetics
8. Model unfolds proteins gently
9. New model to measure disease burden of postmenopausal osteoporosis
10. Yale develops new animal model for hemophilia A
11. UCSF unveils model for implantable artificial kidney to replace dialysis
Post Your Comments:
Related Image:
Mathematical model may result in better environment measures for the Baltic
(Date:11/19/2015)...  Based on its in-depth analysis of the biometric ... the 2015 Global Frost & Sullivan Award for Product ... this award to the company that has developed the ... the market it serves. The award recognizes the extent ... customer base demands, the overall impact it has in ...
(Date:11/17/2015)... PARIS , November 17, 2015 ... 17 au 19 novembre  2015.  --> Paris ... 2015.  --> DERMALOG, le leader de l,innovation ... à la fois passeports et empreintes sur la même ... pour les passeports et l,autre pour les empreintes digitales. ...
(Date:11/12/2015)... CAMBRIDGE, Mass. , Nov. 12, 2015 /PRNewswire/ ... Broad Institute of MIT and Harvard for use ... chemical discovery information management tools. The partnership will ... share both biological and chemical research information internally ... tools will be used for managing the Institute,s ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... 2015 The Global Genomics ... professional and in-depth study on the current state ... ) , The report ... definitions, classifications, applications and industry chain structure. The ... markets including development trends, competitive landscape analysis, and ...
(Date:11/24/2015)... Halozyme Therapeutics, Inc. (NASDAQ: HALO ) will be ... York on Wednesday, December 2 at 9:30 a.m. ET/6:30 ... CEO, will provide a corporate overview. th Annual ... 1:00 p.m. ET/10:00 a.m. PT . Jim Mazzola , ... corporate overview. --> th Annual Oppenheimer Healthcare Conference ...
(Date:11/24/2015)... Inc., a worldwide provider of clinical research services headquartered in ... has set a new quarterly earnings record in Q3 of 2015.  ... Q3 of 2014 to Q3 of 2015.   ... the establishment of an Asia-Pacific office to ... and Mexico , with the establishment ...
(Date:11/24/2015)... 24, 2015 --> ... report released by Transparency Market Research, the global non-invasive ... CAGR of 17.5% during the period between 2014 and ... Global Industry Analysis, Size, Volume, Share, Growth, Trends and ... testing market to reach a valuation of US$2.38 bn ...
Breaking Biology Technology: