Kjeld Rasmussen
Dados Biográficos
| ID | 5776546 |
|---|---|
| NOME | Kjeld Rasmussen |
| PRENOMES | Kjeld |
| SOBRENOME | Rasmussen |
| ASSINATURA | RASMUSSEN K |
| AFILIAÇÕES | University of Copenhagen |
| ORCID | 0000-0003-3111-584X |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 38 |
| TOTAL DE CITAÇÕES | 63 |
| TOTAL COMO AUTOR | 38 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1978 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2015 |
| ÍNDICE H | 4 |
The sustainability of cassava-based bioethanol production in southern Mali
The demand for biofuels has been rising, which has led developing countries to focus on production of feedstocks for biodiesel and bioethanol production. This has caused concerns for the impacts on food security, food prices and environmental sustainability. This paper examines a hypothetical case of cassava-based bioethanol production in southern Mali, assessing its environmental, economic and social sustainability. Results demonstrate that envi…
Weather, Climate, and Resource Information Should Meet the Needs of Sahelian Pastoralists
There has been an increasing focus on providing better weather, climate, and resource information for decision making in drylands. This study explores what kind of information pastoralists in the Sahel received in 2013 and how they responded to this information. Moreover, the study assesses whether the disseminated information corresponds to the actual needs of pastoralists. The overall objective is thus to identify the outcome of providing weath…
Special issue dedicated to Professor Anette Reenberg
Special issue dedicated to Professor Anette Reenberg." Geografisk Tidsskrift-Danish Journal of Geography, 114(1), pp. 1–2
Explaining NDVI trends in northern Burkina Faso
Many studies have shown a ‘greening of the Sahel’ on the basis of analysis of time series of satellite images and this has shown to be, at least partly, explained by changes in rainfall. In northern Burkina Faso, an area stands out as anomalous in such analysis, since it is characterized by a distinct spatial pattern and strongly dominated by negative trends in Normalized Difference Vegetation Index (NDVI). The aim of the paper is to explain this…
Scenarios on future land changes in the West African Sahel
In an attempt to anticipate possible futures of drylands of West Africa in the face of rapid socio-economic and environmental changes, we developed four scenarios based on recent survey data, the literature and our knowledge of the region. The four scenarios are inspired by those developed by the Millennium Ecosystem Assessment: (1) ‘downward spiral’ characterized by rapid climate change, expansion of agriculture and chaotic urban growth; (2) ‘in…
Advances in monitoring vegetation and land use dynamics in the Sahel
Vegetation dynamics of the West African Sahel has attracted great scientific interest over the last 40 years because of the dramatic inter-decadal variability observed in the resource base of the region directly impacting on the livelihoods of the West African population. From farmers to pastoralists, agro-pastoralists and forest-users, all depend on the availability of vegetation resources and are affected by fluctuations in the available vegeta…
Greenness in semi-arid areas across the globe 1981–2007 — an Earth Observing Satellite based analysis of trends and drivers
Sustainable land use in Tikopia
The land use system on Tikopia – a Polynesian outlier in Solomon Islands – is analyzed to determine how it has developed since it was first described in the 1930s and again in the 1970s. Fieldwork included a household questionnaire survey, in‐depth interviews on farming practices and decision making, and the collection of soil samples from the major soil and garden types. The Tikopian land use system has not undergone significant changes since th…
Interdisciplinarity at the Human-Environment interface
Geografisk Tidsskrift—Danish Journal of Geography 110(1):37–45, 2010 Current environmental problems increasingly call for research—as well as education—which crosses the traditional divides between well-established scientific disciplines and between the natural sciences, technical sciences, social sciences and the humanities. This paper addresses the issue of what interdisciplinarity, at the interface between the natural and human sciences, entai…
Adaptation to Climate Change in Developing Countries
Remote sensing techniques for flood monitoring in the Senegal River Valley
Accurate mapping of the aerial extent and duration of yearly flooding of the Senegal River may aid the assessment of the continued viability of traditional flood recession agriculture, as well as the monitoring of hazards to people, irrigated agriculture, buildings and infrastructure. At the same time geomorphologic complexity and expanding rice cultivation requiring dikes and channels make prediction of flooding with hydrological models difficul…
Documentation and evaluation of the CSE Noaa AVHRR data set
A NOAA AVHRR data set covering Senegal and parts of the surrounding countries during the period from 1987 to present is under construction and improvement in an ongoing collaboration between Centre de Suivi Écologique (CSE). Dakar. Senegal, and Institute of Geography, University of Copenhagen (IGUC). This paper details the entire processing chain from raw images to a properly calibrated, geometrically rectified and cloud-masked time-series tracki…
The fire regime of Senegal and its determinants
Biomass burning in Senegal has a range of different causes and affects many different environments. Each cause has a unique spatial and temporal distribution with its own consequences for the fire regime in Senegal. To date, this regime has been only poorly understood due to numerous methodological problems with monitoring fires and mapping their extent. Satellite remote sensing techniques provide the only realistic means of obtaining fire inform…
Actual and potential carbon stocks in the north-sudanian zone. A case study
Since the United Nations' Conference on Environment and Development (UNCED) held in Rio in 1992. the problem of global warming and greenhouse gas emissions have become a serious concern for the international community. There is a growing need for scientific research on carbon exchange and storage in the bio- and geosphere, since carbon emissions are of central importance to the natural greenhouse effect. In particular, methods to increase storage…
Estimating vegetative productivity gradients around watering points in the rangelands of Northern Senegal based on Noaa AVHRR data
This paper tests the hypothesis that high dry season grazing pressures around watering points in rangelands in northern Senegal has a negative effect on vegetative productivity. Time series of NOAA AVHRR satellite images for three rainy seasons are used to estimate integrated NDVI (iNDVI) at a resolution of I km2, and assess the dependence of iNDVI on distance to the nearest dry season water source. The observed ‘iNDVI gradients’ around watering …
Desertification in reverse? Observations from northern Burkina Faso
Use of remote sensing data in distributed hydrological models
Geografisk Tidsskrift, Danish Journal of Geography 99: 47–57, 1999 Research activities aiming at integrating Earth Observation data in large scale distributed hydrological modelling will be presented. The focus will be on the Senegal River basin in West Africa where satellite data from various sensors and from different parts of the electromagnetic spectrum will be used in combination with a distributed model specifically adapted to utilize Earth…
Agricultural systems and transnational water management in the Senegal River basin
Geografisk Tidsskrift, Danish Journal of Geography 99: 59–68, 1999 This paper examines the relationship between hydrology and the functioning of traditional and modern agricultural systems in the Senegal River valley in West Africa. It will be demonstrated that the traditional flood recession agriculture, relying on the natural floodings of the wide river valley, is declining because of a strong reduction of the inundated area. This is due to bot…
Field expansion and reallocation in the Sahel – land use pattern dynamics in a fluctuating biophysical and socio-economic environment
Anmeldelser
The Distribution in Time and Space of Savanna Fires in Burkina Faso as Determined from Noaa AVHRR Data
Geografisk Tidsskrift, Danish Journal of Geography 97: 86–97, 1997. Fires have significant effects on both biological diversity, nutrient cycling and emission of greenhouse gasses in the savanna zones of Africa. The meaning and characterization of the fire regimes of such areas are briefly discussed, and it is demonstrated that time series of NOAA AVHRR satellite images may be used for identifying active fires in Burkina Faso, and thus contribute…
Environmental Monitoring by Remote Sensing in Denmark
Kjeld Rasmussen, Henning Skriver, John Tychsen, Preben Gudmandsen & Morten Olsen: Environmental Monitoring by Remote Sensing in Denmark. Geografisk Tidsskrift, Danish Journal of Geography 94:xx–xx. Copenhagen, Dec. 1994. Danish environmental monitoring of the open sea, coastal waters, lakes, streams, ground water, air and land surfaces is presently based solely on conventional in-situ measurements. This paper discusses the potential for supplemen…
The CHIPS System for Satellite Image Processing
Kjeld Rasmussen, Henrik Steen Andersen, Jens Grundtmann, Bjarne Fog and Lasse Møller-Jensen: The CHIPS System for Satellite Image Processing. Geografisk Tidsskrift, Danish Journal of Geography 94:xx-xx. Copenhagen, Dec. 1994. CHIPS, a software system for satellite image processing and analysis has been developed at The Institute of Geography, University of Copenhagen. The background, philosophy and objectives of this development effort will be br…
Anmeldelser
Anmeldelser
Desertification in reverse? Observations from northern Burkina Faso
Agricultural systems and transnational water management in the Senegal River basin
Geografisk Tidsskrift, Danish Journal of Geography 99: 59–68, 1999 This paper examines the relationship between hydrology and the functioning of traditional and modern agricultural systems in the Senegal River valley in West Africa. It will be demonstrated that the traditional flood recession agriculture, relying on the natural floodings of the wide river valley, is declining because of a strong reduction of the inundated area. This is due to bot…
Field expansion and reallocation in the Sahel – land use pattern dynamics in a fluctuating biophysical and socio-economic environment
Satellite Remote Sensing of Land-use in Northern Burkina Faso—The Case of Kolel Village
Rasmussen, Kjeld & Anette Reenberg: Satellite Remote Sensing of Land-use in Northern Burkina Faso—the Case of Kolel Village. Geografisk Tidsskrift 92:86–93. Copenhagen 1992. On the basis of SPOT satellite images from 1986, 1988 and 1989, the millet fields of the village Kolel in northern Burkina Faso have been mapped, and changes in land-use pattern from year to year have been identified. This article demonstrates that it is feasible to map field…
The Distribution in Time and Space of Savanna Fires in Burkina Faso as Determined from Noaa AVHRR Data
Geografisk Tidsskrift, Danish Journal of Geography 97: 86–97, 1997. Fires have significant effects on both biological diversity, nutrient cycling and emission of greenhouse gasses in the savanna zones of Africa. The meaning and characterization of the fire regimes of such areas are briefly discussed, and it is demonstrated that time series of NOAA AVHRR satellite images may be used for identifying active fires in Burkina Faso, and thus contribute…
Scenarios on future land changes in the West African Sahel
In an attempt to anticipate possible futures of drylands of West Africa in the face of rapid socio-economic and environmental changes, we developed four scenarios based on recent survey data, the literature and our knowledge of the region. The four scenarios are inspired by those developed by the Millennium Ecosystem Assessment: (1) ‘downward spiral’ characterized by rapid climate change, expansion of agriculture and chaotic urban growth; (2) ‘in…
Interdisciplinarity at the Human-Environment interface
Geografisk Tidsskrift—Danish Journal of Geography 110(1):37–45, 2010 Current environmental problems increasingly call for research—as well as education—which crosses the traditional divides between well-established scientific disciplines and between the natural sciences, technical sciences, social sciences and the humanities. This paper addresses the issue of what interdisciplinarity, at the interface between the natural and human sciences, entai…
Estimating vegetative productivity gradients around watering points in the rangelands of Northern Senegal based on Noaa AVHRR data
This paper tests the hypothesis that high dry season grazing pressures around watering points in rangelands in northern Senegal has a negative effect on vegetative productivity. Time series of NOAA AVHRR satellite images for three rainy seasons are used to estimate integrated NDVI (iNDVI) at a resolution of I km2, and assess the dependence of iNDVI on distance to the nearest dry season water source. The observed ‘iNDVI gradients’ around watering …
Applications of multivariate statistical analysis in remote sensing of agriculture
Rasmussen, Kjeld & Olesen, Henrik Hagen: Applications of multivariate statistical analysis in remote sensing of agriculture. Geografisk Tidsskrift 88:100–107. Copenhagen 1988. Applications of satellite remote sensing to agriculture involve two main objectives, the identification and mapping of crops, including estimation of acreages, and monitoring of plant growth or production factors, aiming at estimation/prediction of yields. Deterministic mod…
Ecological Human Geography
Rasmussen, Kjeld and Anette Reenberg: Ecological Human Geography—some considerations of concepts and methods. Geografisk Tidsskrift 80: 81–88. Copenhagen, June 1980. The field of interest for ecological human geograhy is defined as the study of utilization systems. The application of different ecological concepts in human geography is shown, and the fertility of using different types of systems approaches in the analysis is demonstrated on a simp…
Explaining NDVI trends in northern Burkina Faso
Many studies have shown a ‘greening of the Sahel’ on the basis of analysis of time series of satellite images and this has shown to be, at least partly, explained by changes in rainfall. In northern Burkina Faso, an area stands out as anomalous in such analysis, since it is characterized by a distinct spatial pattern and strongly dominated by negative trends in Normalized Difference Vegetation Index (NDVI). The aim of the paper is to explain this…
Advances in monitoring vegetation and land use dynamics in the Sahel
Vegetation dynamics of the West African Sahel has attracted great scientific interest over the last 40 years because of the dramatic inter-decadal variability observed in the resource base of the region directly impacting on the livelihoods of the West African population. From farmers to pastoralists, agro-pastoralists and forest-users, all depend on the availability of vegetation resources and are affected by fluctuations in the available vegeta…
Use of remote sensing data in distributed hydrological models
Geografisk Tidsskrift, Danish Journal of Geography 99: 47–57, 1999 Research activities aiming at integrating Earth Observation data in large scale distributed hydrological modelling will be presented. The focus will be on the Senegal River basin in West Africa where satellite data from various sensors and from different parts of the electromagnetic spectrum will be used in combination with a distributed model specifically adapted to utilize Earth…
Digital Analysis of Landsat Images for Land Use Mapping in Denmark
Niels-Christiansen, Vibeke & Rasmussen, Kjeld: Digital Analysis of Landsat Images for Land Use Mapping in Denmark. Geografisk Tidsskrift 84: 89–92. Copenhagen. January 1984. The applicability of Landsat-data for land use mapping in Denmark is analysed on the basis of a data set consisting of six superimposed images from the growing season 1982. The temporal variation in spectral signatures of crops and land use classes have been studied, and it i…
A Mathematical Description of an Infield-Outfield System
A simple mathematical model description of an infield-outfield system with cropping and grazing and including a ion-transfe mechanism is presented. The model illustrates importan characteristics of the system such as its great flexibility and its ring-shaped land-use pattern
Remote sensing techniques for flood monitoring in the Senegal River Valley
Accurate mapping of the aerial extent and duration of yearly flooding of the Senegal River may aid the assessment of the continued viability of traditional flood recession agriculture, as well as the monitoring of hazards to people, irrigated agriculture, buildings and infrastructure. At the same time geomorphologic complexity and expanding rice cultivation requiring dikes and channels make prediction of flooding with hydrological models difficul…
Documentation and evaluation of the CSE Noaa AVHRR data set
A NOAA AVHRR data set covering Senegal and parts of the surrounding countries during the period from 1987 to present is under construction and improvement in an ongoing collaboration between Centre de Suivi Écologique (CSE). Dakar. Senegal, and Institute of Geography, University of Copenhagen (IGUC). This paper details the entire processing chain from raw images to a properly calibrated, geometrically rectified and cloud-masked time-series tracki…
The fire regime of Senegal and its determinants
Biomass burning in Senegal has a range of different causes and affects many different environments. Each cause has a unique spatial and temporal distribution with its own consequences for the fire regime in Senegal. To date, this regime has been only poorly understood due to numerous methodological problems with monitoring fires and mapping their extent. Satellite remote sensing techniques provide the only realistic means of obtaining fire inform…
The CHIPS System for Satellite Image Processing
Kjeld Rasmussen, Henrik Steen Andersen, Jens Grundtmann, Bjarne Fog and Lasse Møller-Jensen: The CHIPS System for Satellite Image Processing. Geografisk Tidsskrift, Danish Journal of Geography 94:xx-xx. Copenhagen, Dec. 1994. CHIPS, a software system for satellite image processing and analysis has been developed at The Institute of Geography, University of Copenhagen. The background, philosophy and objectives of this development effort will be br…
Anmeldelser
Anmeldelser
A Mathematical Description of an Infield-Outfield System
A simple mathematical model description of an infield-outfield system with cropping and grazing and including a ion-transfe mechanism is presented. The model illustrates importan characteristics of the system such as its great flexibility and its ring-shaped land-use pattern
Ecological Human Geography
Rasmussen, Kjeld and Anette Reenberg: Ecological Human Geography—some considerations of concepts and methods. Geografisk Tidsskrift 80: 81–88. Copenhagen, June 1980. The field of interest for ecological human geograhy is defined as the study of utilization systems. The application of different ecological concepts in human geography is shown, and the fertility of using different types of systems approaches in the analysis is demonstrated on a simp…
Anmeldelser
Anmeldelser
Digital Analysis of Landsat Images for Land Use Mapping in Denmark
Niels-Christiansen, Vibeke & Rasmussen, Kjeld: Digital Analysis of Landsat Images for Land Use Mapping in Denmark. Geografisk Tidsskrift 84: 89–92. Copenhagen. January 1984. The applicability of Landsat-data for land use mapping in Denmark is analysed on the basis of a data set consisting of six superimposed images from the growing season 1982. The temporal variation in spectral signatures of crops and land use classes have been studied, and it i…
Anmeldelser
Anmeldelser
Applications of multivariate statistical analysis in remote sensing of agriculture
Rasmussen, Kjeld & Olesen, Henrik Hagen: Applications of multivariate statistical analysis in remote sensing of agriculture. Geografisk Tidsskrift 88:100–107. Copenhagen 1988. Applications of satellite remote sensing to agriculture involve two main objectives, the identification and mapping of crops, including estimation of acreages, and monitoring of plant growth or production factors, aiming at estimation/prediction of yields. Deterministic mod…
Anmeldelser
Anmeldelser
Anmeldelser
Satellite Remote Sensing of Land-use in Northern Burkina Faso—The Case of Kolel Village
Rasmussen, Kjeld & Anette Reenberg: Satellite Remote Sensing of Land-use in Northern Burkina Faso—the Case of Kolel Village. Geografisk Tidsskrift 92:86–93. Copenhagen 1992. On the basis of SPOT satellite images from 1986, 1988 and 1989, the millet fields of the village Kolel in northern Burkina Faso have been mapped, and changes in land-use pattern from year to year have been identified. This article demonstrates that it is feasible to map field…
Anmeldelser
Environmental Monitoring by Remote Sensing in Denmark
Kjeld Rasmussen, Henning Skriver, John Tychsen, Preben Gudmandsen & Morten Olsen: Environmental Monitoring by Remote Sensing in Denmark. Geografisk Tidsskrift, Danish Journal of Geography 94:xx–xx. Copenhagen, Dec. 1994. Danish environmental monitoring of the open sea, coastal waters, lakes, streams, ground water, air and land surfaces is presently based solely on conventional in-situ measurements. This paper discusses the potential for supplemen…
The CHIPS System for Satellite Image Processing
Kjeld Rasmussen, Henrik Steen Andersen, Jens Grundtmann, Bjarne Fog and Lasse Møller-Jensen: The CHIPS System for Satellite Image Processing. Geografisk Tidsskrift, Danish Journal of Geography 94:xx-xx. Copenhagen, Dec. 1994. CHIPS, a software system for satellite image processing and analysis has been developed at The Institute of Geography, University of Copenhagen. The background, philosophy and objectives of this development effort will be br…
The Distribution in Time and Space of Savanna Fires in Burkina Faso as Determined from Noaa AVHRR Data
Geografisk Tidsskrift, Danish Journal of Geography 97: 86–97, 1997. Fires have significant effects on both biological diversity, nutrient cycling and emission of greenhouse gasses in the savanna zones of Africa. The meaning and characterization of the fire regimes of such areas are briefly discussed, and it is demonstrated that time series of NOAA AVHRR satellite images may be used for identifying active fires in Burkina Faso, and thus contribute…
Field expansion and reallocation in the Sahel – land use pattern dynamics in a fluctuating biophysical and socio-economic environment
Anmeldelser
Use of remote sensing data in distributed hydrological models
Geografisk Tidsskrift, Danish Journal of Geography 99: 47–57, 1999 Research activities aiming at integrating Earth Observation data in large scale distributed hydrological modelling will be presented. The focus will be on the Senegal River basin in West Africa where satellite data from various sensors and from different parts of the electromagnetic spectrum will be used in combination with a distributed model specifically adapted to utilize Earth…
Agricultural systems and transnational water management in the Senegal River basin
Geografisk Tidsskrift, Danish Journal of Geography 99: 59–68, 1999 This paper examines the relationship between hydrology and the functioning of traditional and modern agricultural systems in the Senegal River valley in West Africa. It will be demonstrated that the traditional flood recession agriculture, relying on the natural floodings of the wide river valley, is declining because of a strong reduction of the inundated area. This is due to bot…
Desertification in reverse? Observations from northern Burkina Faso
Remote sensing techniques for flood monitoring in the Senegal River Valley
Accurate mapping of the aerial extent and duration of yearly flooding of the Senegal River may aid the assessment of the continued viability of traditional flood recession agriculture, as well as the monitoring of hazards to people, irrigated agriculture, buildings and infrastructure. At the same time geomorphologic complexity and expanding rice cultivation requiring dikes and channels make prediction of flooding with hydrological models difficul…
Documentation and evaluation of the CSE Noaa AVHRR data set
A NOAA AVHRR data set covering Senegal and parts of the surrounding countries during the period from 1987 to present is under construction and improvement in an ongoing collaboration between Centre de Suivi Écologique (CSE). Dakar. Senegal, and Institute of Geography, University of Copenhagen (IGUC). This paper details the entire processing chain from raw images to a properly calibrated, geometrically rectified and cloud-masked time-series tracki…
Geography (23 obras) · Computer Science (21 obras) · Environmental Science (16 obras) · Remote sensing (12 obras) · Ecology (11 obras) · Ecology (11 obras) · Physical geography (9 obras) · Remote Sensing in Agriculture (9 obras) · Land use (8 obras) · Climate change (7 obras)