Filtyp
Unmanned Aerial Vehicles (UAVs) provide a flexible method for acquiring high-resolution imagery with relative simple operation and cost-effectiveness. This technology emerged 30 years ago and it is widely used by commercial, scientific, and military communities due to its versatility. However, new technology brings new challenges. One of them is the radiometric accuracy of the UAV imagery. Radiome
Secondary organic aerosol (SOA) plays a significant role in climate change by altering the global atmospheric radiation budget. Biogenic volatile organic compounds (BVOCs) are major sources for the formation of SOA. Their relationship is critical to understand the continental biosphere-aerosol-cloud-climate (COBACC) feedback mechanism but receives less attention in previous studies. In this study,
Background The thesis was initiated by Alfdex, an oil mist separator manufacturer, to explore the organisation’s possibility for expansion by adapting their product to separate air and solid particles. They are currently prototyping a new product without knowing what markets it would succeed in and thus have the need for an expansion strategy. The market possibilities for the new product were exam
Cartographic mashups present geographic data from various sources. A typical example is adding thematic data on top of a multi-scales background map. Currently, thematic data and multi-scales background data are not linked together in cartographic mashups which may have potential problems such as inconsistency of scale ranges. However, in some cases, thematic data and background data have some ide
In Sweden the number of cars per person has increased since the mid-20th century. With negative impacts on both health and the environment, private ownership of vehicles represents one of the major challenges in urban transport. To move travelers from privately owned vehicles to public transport has shown to be beneficial in reducing carbon emissions. However, in order to create policies that attr
Scania is a region vulnerable to climate change and climate models project an increase in extreme precipitation events for this area. Pluvial flooding in urban areas is mostly associated with the large amount of impermeable surfaces and sewer system overload. In 2014 the County Administrative Board of Scania released a regional action plan for adaptation strategies and stormwater is described as a
Faced with an acute problem of housing options during the 1960s, the Swedish government introduced a nationwide campaign of ‘A Million New Homes’. In order to achieve the aim of the campaign, the construction of these homes depends on cheap and fast building methods which do not result in the homes being energy efficient nor are they equipped with good acoustical properties. As time progress and s
Sex chromosomes are chromosomes that carry vital sex-determining genes. Different sex determination systems and sex chromosomes have evolved from autosomes independently in different taxa; nevertheless, they share strikingly similar characteristics. Sex chromosomes undergo somewhat unique evolutionary processes due to paucity in recombination and transmission through only one of the sexes. As a re
The dissolved methane (CH₄) dynamics in pore water and nearby stream water were investigated in a subarctic peatland in West Greenland during summer and autumn in 2011. A pore water sampling method was used to collect samples at four depths (5-, 15-, 25- and 35-cm depth) in the fen site. Stream water samples were collected from 13 plots around the study site. The results from the field sampling in
Conventional agriculture in Sweden is facing challenges with low resilience to a changing climate and decreased biodiversity. Silvoarable agroforestry is an alternative land use practice that contain a woody perennial and crop in the same field. Trees on cultivated land break up large monocultures, increase biodiversity, creates functional diversity, and produces more commodities. This land use pr
Anthropogenic climate change has caused temperature increases all across the globe. Mountainous areas are among the most affected and are experiencing alarming rates of warming. Such rapid warming will have effects on alpine vegetation and their distribution throughout the alps. While there are many studies that have investigated shifting vegetation distribution around the world, none have found c
Vegetation in the subarctic is expected to respond to climate warming as its growth becomes less temperature limited. This has previously been recorded in the form of treeline advances and increasing shrub cover. Changes in vegetation cover may accelerate warming due to a decrease in summer albedo, in what is termed surface albedo feedback. A quantification of the relationship between vegetation c
It is estimated that the average Swede throws away 61 kg of food waste annually. The more food waste there is, the more food waste bags are required. Since the implementation of a tax on thin plastic bags, grocery stores have been providing fruit bags of paper as an eco-friendly alternative. This study examines the current usage of paper fruit bags in the municipality of Helsingborg and explores t
Aquaculture is an expanding industry, supplying closer to 50% of the total fish consumption. Commercialized fish production faces sustainability challenges which are important to address. Aquaponics uses wastewater from aquaculture to grow plants using hydroponics. This is a step towards making the industry more sustainable, but the practice is not straightforward. The plants and the fish thrive a
Glaciers and permafrost capture bacteria and viruses when they form, which can be suspended for millennia. This includes long since extinct pathogens which are functionally novel. As polar regions get warmer these pathogens will emerge and spread through the local ecosystem, potentially altering it. Ancient pathogens do not only pose a risk to their local environments as they can be aerosolized an
Climate issues are currently of attention in various contexts as changing climate factors affect us in many ways. One of these effects is the influence on the probability and frequency of fires, although other factors, especially anthropogenic ones, also play a role. In the Diyarbakir region, a Kurdish-Turkish province affected by the PKK's conflict (Partiya Karkerên Kurdistan - Kurdistan Work
Carbon storage capacity estimations of terrestrial vegetation are necessary to understand the limit of possible carbon emissions. General approximations, of a landscapes carbon pool capacity, can be performed using the InVEST-model. It estimates the carbon pool storage of a landscape, based on land use land cover classes, which this thesis aims to test on the highay-ancillary environment of th
Forest fires can act as an ecosystem service by providing habitat renewal, controlling pests, and reducing the risk of extreme fires, but can at the same time disturb an ecosystem negatively. Furthermore, forest fires release carbon dioxide into the atmosphere, damage property, and lead to health issues. With climate change, forest fires are expected to increase in both frequency and intensity in
This thesis develops and evaluates a Random Forest (RF) machine learning classification framework for detecting clear-cut forest felling events using Sentinel-2 multispectral satellite data. While RF classification is widely applied in forest monitoring, its performance for operational clear-cut detection in Latvian semi-boreal forests remains insufficiently studied. This study aims to assess the
