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40 Uppsatser om Atmospheric attenuation - Sida 2 av 3

El nino- Southern ocsillation och de tropiska cyklonerna i Stilla havet

ReferatDe tropiska cyklonerna har både skrämt och fascinerat människor genomtiderna och det pågår en hel del forskning kring dem. I detta arbete studeras omEl niño?Southern ocsillation påerkar antalet, intensiteten eller livslägden pådetropiska cyklonerna i Stilla havet. Till detta anväds temperaturdata frå bojarsom den amerikanska väertjästen National Oceanic and AtmosphericAdministration placerat ut i Stilla havet och insamlad information kring detropiska cyklonerna. Studien baseras pådata frå en 15ås period under åen1995 till 2009.Studien visar bland annat att antalet tropiska cykloner påerkas relativt mycketav de olika faserna i El niñ? Southern oscillation.

Städer och planetära gränser : En utvärdering av Stockholms ochNorra Djurgårdsstadens påverkan påde planetära processerna

The concept of planetary boundaries was introduced in the year 2009 by a group ofresearchers led by Johan Rockström and Will Steffen. The group presented a draft of thelimits of the planet regarding nine Earth System processes concerning climate change, oceanacidification, stratospheric ozone depletion, atmospheric aerosol loading, interference with Pand N cycles, global freshwater use, land-system change, rate of biodiversity loss andchemical pollution. The starting point for the study presented in this report was that asustainable development only can be achieved if humankind stays within the boundaries. It istherefore, based on the ongoing urbanization, relevant to evaluate how cities affect the EarthSystem processes. The aim of the study was to investigate if Stockholm Royal Seaport (NorraDjurgårdsstaden), a district in the northeast of Stockholm with a clear environmental profile,affects the Earth System processes less than Stockholm in general does.

Storjuktan ? Rekonstruktion av ett sekels kvicksilverbelastning. : En undersökning av kvicksilverkoncentrationer i daterat bottensediment.

The aim of this study was to examine the current and historic mercury(Hg) load of the lake Storjuktan due to its recent exposure to a local potential source of Hg in form of the Sulphide mine Blaikengruvan(2006) and an earlier potential sources of Hg-load, the damming of the lake(1960s). Sediments were extracted using a HTH-sampler, freeze-dried, and analyzed for tot-Hg, LOI and activity of 210Pb and compared to samples extracted prior to the opening of the mine(2006). Constant initial concentration (CIC)-dating model was used for dating the samples. Low levels of Hg (100ng/g) were found throughout the lakes sediment. The highest levels of Hg(220ng/g) was detected at a depth of 4-5cm dating back to the mid 1970:s, suggesting that increased levels of atmospheric Hg rather than damming of the lake has caused the increase of Hg.

Vattennivåförändring kring Gamla Uppsala och dess påverkan på människan

ReferatDe tropiska cyklonerna har både skrämt och fascinerat människor genomtiderna och det pågår en hel del forskning kring dem. I detta arbete studeras omEl niño?Southern ocsillation påerkar antalet, intensiteten eller livslägden pådetropiska cyklonerna i Stilla havet. Till detta anväds temperaturdata frå bojarsom den amerikanska väertjästen National Oceanic and AtmosphericAdministration placerat ut i Stilla havet och insamlad information kring detropiska cyklonerna. Studien baseras pådata frå en 15ås period under åen1995 till 2009.Studien visar bland annat att antalet tropiska cykloner påerkas relativt mycketav de olika faserna i El niñ? Southern oscillation.

Undersökning av sambandet mellan strålningstemperatur och NDVI i Sahel

Several studies have analysed the relationship between Normalised DifferenceVegetation Index (NDVI) and radiative surface temperature. A main goal for moststudies have been to find the best method for carrying out land cover classificationsand to study land cover changes, based on a combination between the twoparameters. Since atmospheric components have a significant influence on bothparameters, most applications were based on multi-temporal data. The quality of theindividual values in such a combination is improved, but the biophysical justificationis uncertain. This study presents a different method, based on only the combination ofvalues that have been registered the same day and about the same time of the day.125 daily images of NDVI and 250 images of radiometric temperature were used inorder to analyse the relationship between (1) NDVI and radiative temperature and (2)NDVI and relative temperature difference between early morning and mid-day.Results between NDVI and radiative temperature show a significant negativecorrelation on areas where a distinct growing season develops, and a strong positivcorrelation where vegetation is abscent throghout the season.

ETT MED NATUREN. En ekokritisk studie av naturmotivet hos tre svenska skräckförfattare

Since time immemorial, nature has been conceived of as a female entity. This ancient concept is also a recurring element in contemporary Swedish horror fiction. The purpose of this thesis is to compare the feature of nature in the selected works of Anders Fager, Andreas Marklund and Frida Arwen Rosesund and in what ways these respective depictions rely on a tradition where nature is gendered female. The theoretical starting-point for this comparative study is ecocriticism and its subcategory ecofeminism, which are modes of literary criticism where the role of nature in general, and its female connotations in particular, are appreciated as significant literary features. For executing an analysis that goes beyond what is explicit, the exploration of these three writers? texts also adopts a psychoanalytical perspective.

Dendroklimatologisk analys av lokalklimat vid Grövelsjön i Dalafjällen

Climate on earth is getting warmer, which effects earth?s energy balance and so forth the ocean and atmospheric circulation.  In many sub-polar regions on the northern hemisphere changes due to warming of the climate can be observed. Some examples that already have been observed are shifts in tree line, towards higher altitudes and latitudes, increased ablation of Swedish glaciers and melting of the permafrost on the Siberian tundra. In Sweden climate change scenarios tell us that it will become warmer and that a higher amount of precipitation in form of rain will be an effect from this. To study climate changes in Sweden, transition zones are useful in order to observe changes in distribution of species and animal populations.

Kol-14 datering : En litteraturstudie över hur kol-14 isotopen används för datering, samt utveckling och tillämpning av djup-åldersmodeller inom naturgeografin.

This literature study concerned the use and function of the radioactive isotope carbon-14, as a dating method of organic material, within the scientific field of physical geography. In this report it is presented the need of atmospheric calibration curves and the development of these as a necessity to translate carbon-14 years to calibrated calendar years. A number of common age-depth models that is used to give an approximation of an accumulation sequence and its related dates over the actual time period in different natural archives is presented and discussed. Different problems that commonly occur when age-depth models are utilized as for instance reservoir effects, contaminations or other age deviations are addressed and analyzed. The software CLAM in presented and discussed and was also used to produce age-depth models.

Geokemin inom osorterade cirklar : Analys av tungmetallers distribution inom jordprofiler tagna från Abiskoområdet, nordvästra Sverige

The Arctic region appears as a pristine remote environment, yet there is increasing evidence that it is greatly impacted by pollution such as lead (Pb) and mercury (Hg). In this environment deposition of Hg has increased threefold since the last industrial revolution. In this study five cryosolic soil profiles within non-sorted circles (NSC) in the Abisko region, northwest of Sweden, has been analyzed to improve our understanding regarding how pollutants are distributed within such type of soil. The soil samples have been analyzed with the use of X-ray fluorescence analysis (XRF), for the measurements of the total concentrations of e.g. lead (Pb) and zirconium (Zr).

Effect of liming and free Ca2+ on Cd uptake of carrots, Daucus carota

The level of cadmium (Cd) in Swedish arable land has increased during the last century and the average concentration of Cd in the plough layer is today 0.23 mg/kg. The increase is mainly due to anthropogenic activities such as phosphorus fertilizing, liming, import of feed, and atmospheric deposition from industrial emissions. Cadmium in the soil will be taken up by crops and is thereby transferred to humans via food. Carrot is one of the crops of concern, both because it may contain quite high Cd concentrations and due to the large consumption in Sweden. In the body, Cd is stored mainly in the liver and the kidneys and may cause several diseases already at low concentrations.

Hårdhetsvariation i grundvatten längs Badelundaåsen mellan Leksand och Avesta

Water hardness indicates the concentration of calcium and magnesium ions in water. Water with high concentrations of these ions is described as hard water and water with low concentrations is described as soft water. Water that is too hard or too soft can lead to technical and economical problems. In collaboration with Midvatten AB, groundwater hardness in the Badelunda esker between Leksand and Avesta has been mapped, and an attempt has been made to explain the variations. For this purpose, different GIS programs, such as ArcView, ArcInfo, IDIRISI, and one geochemical modelling program, PHREEQC, has been used.

Tillförlitligheten i beräknade dimensionerande flöden i två mindre vattendrag med trånga sektioner

I Sverige finns idag en vedertagen metod för att bestämma dimensionerande flöde för dammanläggningar. De teoretiska beräkningarna av dimensionerande flöde för dammanläggningar tillhörande flödesdimensioneringsklass I baseras på HBV-modellen, en begreppsmässig hydrologisk beräkningsmodell som beskriver samspelet mellan de meteorologiska och hydrologiska förhållanden som råder inom ett avrinningsområde. Begreppsmässiga hydrologiska modeller baseras på vattenbalansen och används för att bestämma tillrinning till vattendrag, sjöar eller andra vattenförekomster. Vid hydrologisk modellering med begreppsmässiga modeller tas ingen explicit hänsyn till vattendragets geometri. Trånga sektioner i naturliga vattendrag kan hindra vattnets framfart och orsaka dämning uppströms den trånga sektionen.

Serviceförväntningar hos kunder ? En jämförande studie mellan Acne och H&M

Denna uppsats behandlar service, ett fenomen som har växt sig starkare de senaste årtiondena och som har kommit att bli ett avgörande verktyg för många företag för att kunna skapa marknadsfördelar. Att ett företag förvaltar mötet dem och kunden emellan på bästa sätt är ofta en kritisk faktor för att få kunden att återvända till butiken även nästa gång. Vissa företag är mer och andra är mindre beroende av ett bra servicesystem och därför är syftet med denna uppsats att undersöka huruvida serviceförväntningarna hos två olika kundgrupper liknar eller skiljer sig från varandra. Kundgrupperna som valts ut tillhör konfektionsföretagen, H&M som är en kedja i lågprissegmentet och Acne som är ett företag i högprissegmentet. Frågeformuleringen som besvaras i uppsatsen gäller som följer: Hur skiljer sig H&M-kunden från Acne-kunden i sina förväntningar på service i butik? För att besvara frågeställningen används en kvantitativ metod en så kallad muntlig strukturerad intervju som är riktad mot de två kundgrupperna.

Point of Purchase TV-Screens - An Analysis of Gender and Generations in the In-Store Retail Environment

Title: Point of Purchase TV-screens - An analysis of Gender and Generations in the In-store-Retail-EnvironmentDate of Seminar: May 29th 2007 Course: BUS 809, Master Thesis in International Marketing and Brand Management.Authors: Søren Berg Jørgensen, Daniel McCartney and Ben Wallenborn.Supervisors: Karin Alm and Ulf Johansson Keywords: In-store Marketing, Point-of-Purchase, In-store TV, Gender, Generations. Thesis Purpose: The purpose of the thesis is to contribute to a greater understanding as to how consumers react to and perceive PoP TV-screens within the in-store retail environment. More specific, the aim of the study is to investigate if gender and generations react and feel differently towards the use of PoP TV-screens. From a practical standpoint, the study will aid marketers in how they can communicate more effectively with their target-market inside the store. In addition to this, the study will provide retailers with an insight into the overall atmospheric effect that the placement of TV screens has on stores.

Utvärdering av lämpliga metoder för vattengenerering

This master thesis has been performed at the department of Machine Design at KTH, The Royal Institute of Technology. The thesis has been a part of a global development project in collaboration with Luleå University of Technology, Lund Faculty of Engineering and Stanford University. Corporate liaison and sponsor has been Immerse Global Inc. The project was also performed on sponsorship from the Product Innovation Engineering Program, PIEp. The thesis is a representation of some of the contributions made by the authors.The lack of clean drinking water is one of the key issues facing the world today.

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