Ulf Helldén
Professor emeritus
Publikationer
Visar av publikationer. Sorterade efter år och sen titel.
Assessing woody biomass in African tropical savannahs by multiscale remote sensing
Weicheng Wu, Eddy De Pauw, Ulf Helldén
(2013) International Journal of Remote Sensing, 34 p.4525-4549
Artikel i tidskriftGreenness in semi-arid areas across the globe 1981-2007 - an Earth Observing Satellite based analysis of trends and drivers
Rasmus Fensholt, Tobias Langanke, Kjeld Rasmussen, Anette Reenberg, Stephen D. Prince, et al.
(2012) Remote Sensing of Environment, 121 p.144-158
Artikel i tidskriftRegional desertification: A global synthesis
Ulf Helldén, Christian Töttrup
(2008) Global and Planetary Change, 64 p.169-176
Artikel i tidskriftLU-CDM, A Conceptual Model of Desertification
Ulf Helldén
(2008) FP6, DeSurvey IP, Sub-deliverable 1.3.3.8 (1), Deliverables data base
RapportA coupled human-environment model for desertification simulation and impact studies
Ulf Helldén
(2008) Global and Planetary Change, 64 p.158-168
Artikel i tidskriftLong term NOAA-AVHRR GIMMS-NDVI - rainfall relationships and trends 1981 to 2003 for entire DeSurvey area of interest
Christian Töttrup, Ulf Helldén
(2007) FP6, DeSurvey IP, Sub-deliverable 1.5.1.17 (1), Deliverables data base
RapportDeliverable 1.3.3.1.: Desertification syndromes for the target & validation DeSurvey areas
John Thornes, Ulf Helldén
(2006) EU,FP6, DeSurvey IP, Deliverable 1.3.3.1, Deliverables data base
RapportRemote Sensing and Geomatics Strategies for Desertification and Land Degradation Monitoring and Assessment
Joachim Hill, Ulf Helldén
(2005) Proceedings: Local & Regional Desertification Indicators in a Global Perspective , p.113-124
KonferensbidragCASE STUDIES OF DESERTIFICATION MONITORING. -A DISCUSSION OF EU INITIATIVES
Ulf Helldén
(2005) Proceedings: Local & Regional Desertification Indicators in a Global Perspective , p.195-203
KonferensbidragDesertification and Theories of Desertification Control: A discussion of Chinese and European concepts
Ulf Helldén
(2003) Proceedings of the China-EU Workshop on Integrated Approach to Combat Desertification , p.94-104
KonferensbidragClimate Change and Land Degradation in Iceland
Ulf Helldén, Rannvig Olafsdottir
(2001) Response to Land Degradation , p.78-79
Del av eller Kapitel i bokDesertification and global climate change – Little Ice Age desertification in Iceland?
Ulf Helldén, Rannveig Brogaard
(1999) Proceedings of the 2nd International Conference on Land Degradation
KonferensbidragLand degradation in NE Iceland : an assessment of extent, causes and consequences
Ulf Helldén, Rannveig Olafsdottir
(1999) Lund electronic reports in physical geography
RapportComments on dryland degradation assessment; In:Drylands-Sustainable Use of Rangelands into the Twenty-first Century
Ulf Helldén
(1998) Drylands-Sustainable Use of Rangelands into the Twenty-first CenturySeries (IFAD Technical Reports) , p.25-30
Del av eller Kapitel i bokÖkenspridning-ett lokalt problem?
Ulf Helldén
(1995) Naturvetenskapliga forskningsrådet. Årsbok 1995 “Det evigt rinnande vattnet”. ss 131-142. , p.131-142
Artikel i tidskriftDesertification, fact or fiction?
Ulf Helldén
(1994) Our Planet. -The United Nations Environment Programme Magazine for Sustainable Development,, 6 p.33-33
Artikel i tidskriftAn Approach to Monitoring and Assessment for Planning and Management in African Drylands
Ulf Helldén
(1993) Proceedings of Int. Symp. on "Natural Resource Inventory and Sustainable Management of Forested Areas in Africa" , p.9-14
KonferensbidragLand Cover Conversion, Land Degradation and Desertification in Africa and Asian Drylands-An Assessment of Regional and Continental Change
Ulf Helldén
(1993) Proceedings of the Int. Symp. on Remote Sensing in Arid and Semi-arid Regions-.
KonferensbidragEstimation of the forest cover and its changes over time by means of remote sensing in semi-arid Africa.
Ulf Helldén
(1992) Management of Natural Forests in Semi-arid Areas of Africa-Present knowledge and research needs , p.47-68
Del av eller Kapitel i bokDesertification-Time for an Assessment?
Ulf Helldén
(1991) Ambio: a Journal of Human Environment, 20 p.372-383
Artikel i tidskriftRapport från ett internationellt möte om ökenspridning
Ulf Helldén
(1991) Svensk Geografisk Årsbok, 67 p.73-82
Artikel i tidskriftNational Drought Impact Monitoring- A NOAA NDVI and precipitation data study of Ethiopia
Ulf Helldén, Lars Eklundh
(1988) Lund Studies in Geography, Ser. C. General, Mathematical and Regional Geography
Rapport