Nettsider med emneord «Climate change» - Side 2

Publisert 18. jan. 2015 15:37

Some while ago a student asked us if we were collecting data in the marine ecological group at CEES. We were forced to acknowledge that we were not.  From this follows a real cri de coeur: “but we are only scavengers!” Are we really? If we are, is it all bad?

Publisert 18. des. 2014 15:47

Increased sea temperature due to climate change can influence the distribution, abundance and seasonal timing of zooplankton. Changing zooplankton dynamics might in turn impact the higher trophic levels, such as fish and seabirds, feeding on these animals. In a recent paper, we show that temperature variation in the Atlantic waters of the Norwegian Sea and Barents Sea might have stronger effects on the abundance of the younger than older development stages of Calanus finmarchicus, and that these stages might appear earlier in spring during warm years.

Publisert 12. des. 2014 00:00

Climate change is thought to change many aspects of the marine life. Among others, one can mention changes in species distribution (immigration of species; new species coming to northern areas), the rate of development (warmer the temperature, the faster is the development), and change in the timing of the reproduction. The latter has recently caught a lot of attention around a nearly 50 years old hypothesis of the British fisheries biologist David Cushing.

Publisert 5. des. 2014 00:00

Climate change, and especially alteration in sea temperature, is expected to have major effects on the distribution and abundance of marine fish. This is in particular the case in northern high-latitude marine ecosystems, where IPCC expects global warming to be especially pronounced.

Publisert 5. aug. 2014 10:39

Surface waters in Scotland, as well as in southern Norway and southern Sweden have experienced a significant increase in NOM-concentrations and fluctuations over the last decades, likely due to the combined effects of climate variation and reduced acid rain.

NOM concentration levels and physiochemical properties vary significantly in space and time. Especially the seasonal fluctuations are site specific and therefore unique to any raw water source.

Surface waters are commonly used as raw water sources by waterworks for tap-water production in these countries. NOM in the water affect colour, taste and odour. Increasing concentrations of NOM, thus, causes increased demand for coagulant and disinfectant doses. NOM influences, furthermore, the stability and thereby the removal of inorganic particles and pathogens and increase the mobility of micro-pollutants. It fouls membranes, block filtration pores and compete for adsorption sites. In the water distribution networks, NOM influences on corrosion and leads to regrowth and biofilm formation during distribution, including house installations (e.g. problems with biofilm-amoebae-Legionella).

The increasing amount and variability of NOM concentrations and characteristics, thus, represents severe challenges for process control in water treatment and distribution systems.

Publisert 5. aug. 2014 09:45

Lakes and rivers are the source of drinking water for most people in Norway, Sweden and Finland. Presently, climate change is posing a threat for the quality of drinking water sources. In recent years, concentrations of dissolved organic matter (DOM) in lakes and rivers have increased and associated with this, surface waters have become browner. This poses a major challenge to drinking water providers, as removal of DOM is a key step in drinking water treatment.

Both climate and atmospheric deposition are likely to blame for the brownification of surface waters. Brownification is expected to continue under climate change, but to what extent is unclear. Adaptation measures needed are likely to raise costs of water treatment and require long-term investments. In order to maintain good drinking water quality in the future, municipalities and other stakeholders urgently need science-based projections of raw water quality under climate change as well as information about the possibilities for, and costs of adaptation.

 

Publisert 10. apr. 2014 10:42

There are, unfortunately, no master projects available at this stage!

The project “Effects of Neonicotinoids and Temperature on Crop Pollination (NEOPOLL)” is a ~4 year Researcher project awarded Anders Nielsen (PI) over the Miljøforsk program at the Norwegian Research Council. The project started in April 2017. There are several master students involved in the project, investigating different aspects of how neonicotinoids affect bumblebee behaviour and colony development, but also more ecotoxicological approaches related to pesticide accumulation in nectar, pollen and bumblebees.

Publisert 10. apr. 2014 10:42

There are, unfortunately, no master projects available at this stage!

The project “Effects of Neonicotinoids and Temperature on Crop Pollination (NEOPOLL)” is a ~4 year Researcher project awarded Anders Nielsen (PI) over the Miljøforsk program at the Norwegian Research Council. The project started in April 2017. There are several master students involved in the project, investigating different aspects of how neonicotinoids affect bumblebee behaviour and colony development, but also more ecotoxicological approaches related to pesticide accumulation in nectar, pollen and bumblebees.

Publisert 24. mars 2014 23:09

The NEOPOLL project, funded by the Research Council of Norway, is moving. Julie Sørlie Paus-Knudsen has been hired as a PhD student and started December 1th 2017. In addition we have taken on two master students (Pawel Jan Kolano and Malin Aarønes) to work on the project.

Publisert 7. feb. 2014 09:59

Stability and Variations of Arctic Land Ice (NCoE - SVALI) is a Nordic Centre of Excellence (NCoE), which aims to improve our understanding of stability, variations and dynamics of the cryosphere. The centre was appointed in June 2010 by Nordforsk under Top-level research. Department of Geosciences, participate with research projects and in the management of the centre, which is a collaboration between 18 research institutions from all the Nordic countries.

Publisert 10. des. 2013 21:17
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. nov. 2013 19:07

The Cryosphere includes all frozen water on the Earth's surface, all areas where snow, ice and permafrost affect the landscape and processes occurring there. We find a big amount of water tied up in glaciers and icecaps in Arctic and Antarctic, but also in permafrost and smaller glaciers worldwide.