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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Norske bønder og globale klimaendringer : En kvantitativ analyse av bønders oppfatninger av hvordan deres egne gårdsbruk vil bli påvirket av klimaendringer

Aasprang, Brita January 2012 (has links)
I denne analysen ser jeg på norske bønders oppfatninger av hvordan de tror klimaendringer vil påvirke gårdsbrukene deres de neste 10 årene. Jeg ser også på forskjeller mellom bønder som mener klimaendringer vil påvirke brukene deres negativt versus positivt, hovedsakelig i lys av sosiale og individuelle variabler, og egenskaper ved gårdsbrukene til bøndene. Jeg går også inn på hvordan temaene tillit, kunnskap om og interesse for klimaendringer, direkte og indirekte effekter som klimaendringer kan få for bøndenes gårdsdrift og bøndenes syn på naturen kan påvirke hvordan bønder tror deres bruk vil bli påvirket av klimaendringer. For å svare på problemstillingene mine bruker jeg data fra spørreundersøkelser som er innsamlet av Senter for bygdeforskning. Jeg bruker to ulike datasett. Den ene undersøkelsen heter Trender i norsk landbruk, og er en undersøkelse som sendes ut hvert annet år til norske bønder. Den andre undersøkelsen jeg benytter meg av i mine analyser er laget i et samarbeid mellom Senter for bygdeforskning, Norsk institutt for landbruksøkonomisk forskning (Nilf) og Norsk institutt for Skog og landskap. Jeg fant at de fleste av bøndene enten tror at bruket vil bli påvirket i noe negativ retning, eller at bruket ikke vil bli påvirket av klimaendringer de neste 10 årene. Det var færre som oppga at de tror klimaendringene vil påvirke brukene deres positivt enn negativt. Svært få svarte at de tror klimaendringene vil påvirke brukene i svært negativ eller positiv retning. Dette kan tyde på at bønder i større grad ser risikoen forbundet med klimaendringer heller enn mulighetene. Jeg bruker OLS-regresjon for å se på hvordan bøndene stiller seg på en skala fra negativt til positivt i spørsmålet om hvordan de tror klimaendringene vil påvirke deres eget gårdsbruk i løpet av de neste 10 årene. Jeg fant at kvinner, de yngste og de eldste aldersgruppene, de som har landbruksutdanning, de som er lokalisert i Nord-Norge og de som har kornproduksjon som hovedproduksjonen på gårdsbruket i større grad enn andre bønder tror klimaendringene vil påvirke gårdsdriften deres negativt i løpet av de neste 10 årene. Jeg fant også at bønder som oppgir at de i stor grad er opptatt av klimaendringer i større grad tror klimaendringer vil påvirke brukene deres negativt, mens de som oppgir at de har mye kunnskap om klimaendringene og de som oppgir at de ønsker å øke sin klimakompetanse i større grad tror klimaendringene vil påvirke brukene deres positivt.
2

The Lunar Nodal Cycle Influence on the Barents Sea

Yndestad, Harald January 2004 (has links)
<p>The Barents Sea contains one of the most productive marine areas in the world. For centuries, Northeast Arctic cod and Norwegian spring spawning herring have been of vital importance for the Norwegian fish export industry and hence economic growth in Norway. It has been common knowledge that the biomass of different Barents Sea species experiences both shortand long-term fluctuations. These fluctuations have been explained by changes in herring cycles and cod cycles, or by the introduction of new fishing equipment, and more. Norwegian marine research began in earnest at the beginning of the 19th century. The main task for researchers was to discover how nature influenced cod stocks and the effects these fluctuations had on the lives of people who depended on fishing for a living. Nearly 100 years later, scientists still disagree over the causes for the biomass fluctuations in the Barents Sea. At the same time, marine research has produced long time series, which can now be analyzed using new methods. This thesis represents an investigation of a number of long time series of Arctic climate indicators and biomasses in the Barents Sea. The purpose of this analysis has been to identify a potential stationary cycle in the biomasses. A stationary cycle in the biomass allows for expanded possibilities for better long-term biomass forecasting.</p><p>The methods are based on general systems theory, analysis of systems dynamics and a wavelet analysis of time series. The wavelet analysis has identified the cycle time and the cycle phase of the dominant cycles in the time series. The phase-relation between the identified cycles contains information abort the dynamic chain of events between climate indicators and the biomasses in the Barents Sea.</p><p>The investigation has identified harmonic and sub-harmonic cycles of the 18.6-year lunar nodal cycle in all analyzed time series. The identified lunar nodal spectrum is explained by a gravity force from the 18.6-year lunar nodal cycle as the First Cause. The energy from the 18.6-year gravity force from the moon introduces a chain of oscillating events. The oscillating gravity introduces a lunar nodal spectrum in the lunar nodal tide and the polar position. A wavelet analysis of time series indicates that movement of the polar position introduces a new lunar nodal spectrum of circulating water in the Arctic Ocean. This circulation water interacts with the 18.6-year lunar nodal tide in the Atlantic Ocean and introduces an oscillation in the extent of Arctic ice, and an oscillation in the inflow of the Atlantic Ocean to the Barents Sea. The lunar nodal spectrum of Atlantic inflow introduces a lunar nodal spectrum in the Barents Sea ecology system. Analysis of the biomass in the Barents Sea shows that long-term growth, reduction and collapse are associated with the phase-relation between the biomass eigen dynamics and the lunar nodal spectrum of Atlantic inflow.</p> / Papers I - VI reprinted with kind permission of Elsevier, www.sciencedirect.com
3

The Lunar Nodal Cycle Influence on the Barents Sea

Yndestad, Harald January 2004 (has links)
The Barents Sea contains one of the most productive marine areas in the world. For centuries, Northeast Arctic cod and Norwegian spring spawning herring have been of vital importance for the Norwegian fish export industry and hence economic growth in Norway. It has been common knowledge that the biomass of different Barents Sea species experiences both shortand long-term fluctuations. These fluctuations have been explained by changes in herring cycles and cod cycles, or by the introduction of new fishing equipment, and more. Norwegian marine research began in earnest at the beginning of the 19th century. The main task for researchers was to discover how nature influenced cod stocks and the effects these fluctuations had on the lives of people who depended on fishing for a living. Nearly 100 years later, scientists still disagree over the causes for the biomass fluctuations in the Barents Sea. At the same time, marine research has produced long time series, which can now be analyzed using new methods. This thesis represents an investigation of a number of long time series of Arctic climate indicators and biomasses in the Barents Sea. The purpose of this analysis has been to identify a potential stationary cycle in the biomasses. A stationary cycle in the biomass allows for expanded possibilities for better long-term biomass forecasting. The methods are based on general systems theory, analysis of systems dynamics and a wavelet analysis of time series. The wavelet analysis has identified the cycle time and the cycle phase of the dominant cycles in the time series. The phase-relation between the identified cycles contains information abort the dynamic chain of events between climate indicators and the biomasses in the Barents Sea. The investigation has identified harmonic and sub-harmonic cycles of the 18.6-year lunar nodal cycle in all analyzed time series. The identified lunar nodal spectrum is explained by a gravity force from the 18.6-year lunar nodal cycle as the First Cause. The energy from the 18.6-year gravity force from the moon introduces a chain of oscillating events. The oscillating gravity introduces a lunar nodal spectrum in the lunar nodal tide and the polar position. A wavelet analysis of time series indicates that movement of the polar position introduces a new lunar nodal spectrum of circulating water in the Arctic Ocean. This circulation water interacts with the 18.6-year lunar nodal tide in the Atlantic Ocean and introduces an oscillation in the extent of Arctic ice, and an oscillation in the inflow of the Atlantic Ocean to the Barents Sea. The lunar nodal spectrum of Atlantic inflow introduces a lunar nodal spectrum in the Barents Sea ecology system. Analysis of the biomass in the Barents Sea shows that long-term growth, reduction and collapse are associated with the phase-relation between the biomass eigen dynamics and the lunar nodal spectrum of Atlantic inflow. / Papers I - VI reprinted with kind permission of Elsevier, www.sciencedirect.com

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