Nettsider med emneord «climate change»

Publisert 3. mai 2013 11:35

Climate Changes and Zoonotic Epidemiology in Wildlife Systems (ZEWS)

Publisert 1. okt. 2020 10:38

The aim of this thesis is to investigate possibilities for creating digital replicas of urban landscapes and regional characteristics, cities' infrastructure elements (e.g., homes, properties, streets, etc.) to simulate what-if scenarios that show the impact of climate change such as flooding in cities and how they may be managed. Such simulations can be used to determine flooding risks for existing conditions and to evaluate proposed mitigation strategies. The resulting flood resilience model can be used for analysis, simulation, visualization, planning and communication, as well as a better assessment of the socio-economic impact of cities' projects. As part of this thesis, various aspects related to relevant historical and actual data, AI models, and modern data visualization techniques will be investigated.

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.

Photo of Pont du Gard August 2013 showing low water flow in the river Gardon in the south of France. Pont du Gard is an aqueduct and bridge from the Roman time. Photo: Henny van Lanen
Publisert 22. nov. 2011 23:03

Water availability is expected to be highly sensitive to climate change and severe water stress conditions may cause major social, economic and environmental problems. This requires better knowledge on the drought generating mechanisms, its impacts and mitigation options.

The aim of the DROUGHT-R&SPI project is to improve drought preparedness in Europe through increased knowledge of drought generating processes, drought early warning and management plans, and improved science-policy interfacing.

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 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 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 10. des. 2013 19:55
Publisert 17. apr. 2015 10:02

Scientists in geodynamics and meteorology from UiO, in collaboration with researchers in geosciences from Bergen, Tromsø and UNIS, received 19.5 million kroner from the Norwegian Research Council (NFR) for a new Research School on “Changing climates in the coupled earth system” (CHESS).

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 13. okt. 2015 11:23

This project explores how climate change and other long-term environmental changes can influence the transport, uptake and food web transfer of mercury in boreal lakes.

two dell picture symbolysing cold years and warm years withe effect on cod and haddock
Publisert 10. aug. 2020 12:16

In the Boreal-Arctic seas, the two most abundant gadoid fish are the Atlantic cod (Gadus morhua) and the haddock (Melanogrammus aeglefinus). Both tend to respond to climate warming by an abundance increase and a change of distribution. Are these changes affecting how they are interacting? Statistical analysis using a state-space threshold model of acoustic and trawl survey data on cod and haddock abundance indicates that the interaction is changing with sea temperature: the cod negatively affecting the haddock when sea temperature is over 4 °C.

King penguin chick
Publisert 26. okt. 2020 10:05

Seabirds in Polar Regions are experiencing increasing environmental stress due to climate change and pollution. They also serve as indicator species for changes in the environment. But what do they tell us about how seabird populations are affected by contaminants and climate, and is the situation the same in Antarctica as in the Arctic?

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 4. des. 2015 01:00

Penguins are highly visible species for the public. Their life has been portrayed in many movies. Unfortunately they are also species impacted by climate change. In a recent publication a team led by Charles Bost used long-term data to relate the large-scale climatic anomalies in the Southern Hemisphere to the foraging behaviour and population dynamics of the king penguin.

Publisert 3. sep. 2012 15:45

The Perma-Nordnet research network aims to take on an important role in permafrost research, addressing the relation between thermal, bio-geochemical and hydrological processes. The task of the network is to initiate and catalyse such efforts, as well as to build, carry forward and tighten existing co-operations between the network members.

Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Publisert 10. des. 2013 19:55
Smog in Beijing, China. Photo: N.R. Sælthun, Department of Geosciences.
Publisert 8. feb. 2011 14:55

Climate and the effects of climate change present one of the greatest challenges of our time. It is a very broad research field which ignores the traditional boundaries between geoscience disciplines.

Blocks of ice on the flat landscape, Svalbard. Photo: Colourbox
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.

Image may contain: Line, Text.
Publisert 24. okt. 2019 16:13

Climate warming is changing the timing of among others the reproduction for plankton or fish. Predators depend on an abundant prey supply to feed their young and insure that they survive. When the timing of the prey and the predator are not in synchrony the predator young cannot feed and are dying: there is a mismatch.

Publisert 10. des. 2013 19:55
Publisert 18. feb. 2015 16:14

Much of our present knowledge on the ecology and behaviour of animals is derived from longitudinal studies of individuals using long-term datasets. The collection of such datasets requires the ability to identify individuals repeatedly over time, i.e. by individual markings. Here comes the problems for Penguins.