Sökning: "seasonality"

Visar resultat 1 - 5 av 83 avhandlingar innehållade ordet seasonality.

  1. 1. Suicide Seasonality : Theoretical and Clinical Implications

    Författare :Georgios Makris; Fotios Papadopoulos; Lisa Ekselius; Hans Ågren; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; suicide; season; antidepressants; sunshine; temperature; Psychiatry; Psykiatri;

    Sammanfattning : Background: Although suicide seasonality has been well-documented, surprisingly little is known about its underlying mechanisms.Methods: In this thesis, data from three Swedish registers (Cause of Death Register, National Patient Register, Prescribed Drugs Register) and data from the Swedish Meteorological and Hydrological Institute were used. LÄS MER

  2. 2. Seasonality and variability of stratospheric water vapour

    Författare :Tongmei Wang; Abdel Hannachi; Qiong Zhang; Alexey Karpechko; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; stratospheric water vapour; seasonality; variability; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Sammanfattning : Stratospheric water vapour (SWV) plays a critical role in the climate system by modulating the radiation budget and influencing the stratospheric chemistry. Studying changes of SWV on global scale is helpful for our understanding of climate change. LÄS MER

  3. 3. Water Quality in Swedish Lakes and Watercourses : Modeling the Intra-Annual Variability

    Författare :Julia Hytteborn; Kevin H. Bishop; Andreas C. Bryhn; Johan Temnerud; Bergström Ann-Kristin; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Total organic carbon; cyanobacteria; seasonality; water quality modeling; climate change; surface water; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Sammanfattning : Water quality is of great importance for ecosystems and society. This thesis characterized and modeled the variation in several key constituents of Swedish surface waters, with particular consideration given to intra-annual variability and sensitivity to climate change. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  5. 5. Food insecurity and coping strategies in semiarid areas : the case of Mvumi in central Tanzania

    Författare :Emma T. Liwenga; Tor A Benjaminsen; Stockholms universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Food insecurity; semiarid; local knowledge; seasonality; coping strategies; livelihood strategies.; Human geography; Kulturgeografi; Human Geography; kulturgeografi;

    Sammanfattning : This study examines how people in dryland areas cope with food insecurity and adversities over time. It draws from the experience of the Gogo people living in Mvumi in the semiarid zone of central Tanzania, an area with a long history of food shortages. The study specifically examines the potential for dryland resources to sustain livelihoods. LÄS MER