Search for dissertations about: "Seasonality"

Showing result 6 - 10 of 107 swedish dissertations containing the word Seasonality.

  2. 6. AVHRR NDVI for monitoring and mapping of vegetation and drought in East African environments

    Author : Lars Eklundh; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geologi; fysisk geografi; physical geography; Geology; phenology; seasonality; Fourier series; geostatistics; signal-to-noise ratio;

    Abstract : In this thesis, an assessment is made of the performance of the Normalized Difference Vegetation Index (NDVI) derived from coarse resolution data from the NOAA AVHRR sensor, with particular reference to mapping and monitoring of drought and vegetation in East African vegetation and climatic conditions. Methods for analysing time series of satellite data are investigated. READ MORE

  4. 7. Seasonal aspects of peripartum depressive symptoms

    Author : Hanna E. Henriksson; Alkistis Skalkidou; Fotios Papadopoulos; Sara M Sylvén; Stavros I Iliadis; Lauren M. Osborne; Uppsala universitet; []
    Keywords : peripartum depressive symptoms; pregnancy; postpartum; seasonality; meteorological parameters; inflammatory markers; proximity extension assay; metabolomics; gas chromatography-mass spectrometry;

    Abstract : Every year, a large proportion of pregnant and newly delivered women develop peripartum depression, a condition that may cause long-term suffering for the entire family. Although there is a lack of consensus, some studies propose an association between season and the risk of developing depression during pregnancy and the postpartum period. READ MORE

  5. 8. Predictions Within and Across Aquatic Systems using Statistical Methods and Models

    Author : Peter H. Dimberg; Roger Herbert; Andreas C. Bryhn; Gesa Weyhenmeyer; Mikael Malmaeus; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lake; Water quality; Chlorophyll-a; Total phosphorus; Seasonality; Morphometry; Regression model; Probability; Markov chain; Genetic programming; Temporal-trend; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Abstract : Aquatic ecosystems are an essential source for life and, in many regions, are exploited to a degree which deteriorates their ecological status. Today, more than 50 % of the European lakes suffer from an ecological status which is unsatisfactory. READ MORE

  6. 9. Temperature variation in time and space, and its effects on insects

    Author : Loke von Schmalensee; Philipp Lehmann; Gotthard Karl; Michael Angilletta; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; temperature variation; thermal performance; insects; Lepidoptera; thermal adaptation; thermal ecology; microclimate; seasonality; zoologisk ekologi; Animal Ecology;

    Abstract : Nature is variable. Unfortunately, compressed representations of this variable world, like averages, are often lossy and insufficient for ecological purposes. This is particularly true for temperature variation, which organisms typically respond to in a nonlinear way. READ MORE

  7. 10. Reading bones : Stone Age hunters and seals in the Baltic

    Author : Jan Storå; Jan Ekman; Stockholms universitet; []
    Keywords : Epiphyseal fusion; Harp seal; Marine mammals; Neolithic; Pitted Ware culture; Ringed seal; Seal hunting; Seasonality; Taphonomy; arkeologi; Archaeology;

    Abstract : This is a study of hunters and seals in the Stone Age in the Baltic. The ambition has been to develop and utilize methods for osteological analyses of archaeological seal bones. The main aims of the zooarchaeological analyses have been to study seal hunting strategies and the formation processes of the faunal remains. READ MORE