Sökresultat

The influence of a small valley on the air temperature has been studied in the Kungsmarken nature reserve, five km east of Lund. The development of cold air during clear, calm nights has been the main topic and the survey is a part of a project at the Department of Physical Geography, University of Lund, concerning the construction of a computerbased model to determine the development of cold air

The paper deals with the influence of the exposition of the sky (expressed by means of a so called sky view factor) on the air temperature in different levels above streets in the city of Malmö, Sweden. It also describes a method of calculating the sky view factor.

In this paper the different factors that are of importance for the iceconditions in the southern part of the Sound are discussed. The factors are: the air temperature, the water temperature, the wind, the current, the salinity, the coastlines and the quantity of ice in the southwestern part of the Baltic Sea. The wind and the current have an influence on the iceconditions, and this is studied more

This paper is a documentation of the storm and the inundation that hit the Murcia-Alicante regions, southeast Spain, in November 1987. It is also a description of the Murcia region from a geographical point of view. Special attention has been payed to the severe erosion i the area and the relations between vegetation cover, climate and erosion in this moisture stressed Mediterranean environment.

This paper is an investigation of the urban climate of Malmö (population about 230,000) in the south of Sweden. The purpose for this study has been to investigate and combine information, obtained by two different methods for measuring temperature, conventional equipment as well as thermograms taken from the air.

In order to study the influence of the weather on the snowmelt in the Tarfala Valley, a survey of the runoff from the snow in the valley, was performed in May and June 1988, at the Tarfala Research Station. The aim of the survey was to find a simple numerical model that corresponds well to the runoff from the snow and to identify reasons for deviating runoff in different places. The survey was bas

This paper is about road surface temperatures in the city of Lund, situated in the southern part of Sweden. The measurments were carried out during Febuary and March 1988. The temperature of the road surface and 0.1 and 2m above this, wind speed and direction were measured and the cloud cover estimated. Meteorological data were obtained from SMHI (the Swedish meteorological and hydrological instit

The aim of this study was to examine if Landsat TM data could be used to : (I) estimate autumnal rape seed area (II) study the wintering of autumnal rape seed (III) estimate autumnal rape seed yield. The study took place in the province of Scania, Sweden. Two Landsat TM scenes, registrated 85-11-08 and 86-05-03, were included. The scenes were radiometric and geometric corrected in an image proces

The strain on water resources with the increased man-induced environmental changes through water pollution, is creating a growing demand in the understanding and management of complex hydrological systems where both water quality and quantity are concerned. This is beyond the capabilities of lumped models and more advanced tools are needed to predict these effects and hence the need for physically

Global warming has both short and long term effects on seasonal phenological cycles of vegetation. Phenology parameters of vegetation such as start, end, length and amplitude of season can describe life cycle events of vegetation. In this thesis, long-term dataset of GIMMS NDVI time series from 1983 to 2005 was used to extract and analyze vegetation phenology over Sahelian to equatorial areas and

The Arctic tundra has been considered as one of the most sensitive areas to global climate change. One impact of global warming is that permafrost thawing could result in more waterlogged and anaerobic conditions, and consequently an increasing release of methane (CH4) to the atmosphere. These potential CH4 emissions can further amplify global warming. Therefore, it is important to assess the quan

The aim of this study is to analyze whether the presence of weed species resistant to herbicides is related to landscape heterogeneity and environmental variables. C3 and C4 weed species, such as Chenopodium album, Conyza canadensis, Amaranthus retroflexus, Papaver rhoeas, Sorghum halepense, Echinochloa crus-galli and Lolium rigidum, are studied in two differing bioclimatic countries, Greece and G

Popular science Glaciers are very sensitive indicators of climate change. The major cause of melting glaciers is global warming. This rapid rate of melting has serious negative impact on the earth causing flooding, leaving impact on flora and fauna, resulting in shortage of freshwater and hydroelectricity. The long-term monitoring of glaciers and the knowledge gained from it can help governments,

Scientific summary Urban growth and recent development removes the natural land cover and replaces it with a new cover of manmade features (e.g. buildings, streets, industrial areas, commercial complexes etc.). Accordingly, the local climate of these cites has been modified by new land use and land cover alterations which has created the Urban Heat Island (UHI) phenomenon. Erbil City in northern I

Popular science There are tiny airborne particles called aerosols in atmosphere that cool climate on the Earth by reducing incoming radiation from the Sun. They play an important role in cloud formation and affect the properties of the clouds. There were no clouds without aerosol particles. Aerosol particles can enter the atmosphere due to anthropogenic and natural emissions and that is why these

Fallow, understood as a period where no crop is cultivated during a growing season, is an important crop management practice. Fallow plays an important role in pest and disease management, and monitoring the presence and duration of fallow can have implications for understanding the extent and effectiveness of this agricultural practice. Therefore, fallow period mapping using remotely sensed data