Hotspots of uncertainty in land-use and land-cover change projections a global-scale model comparison

Hotspots of uncertainty in land-use and land-cover change projections : a global-scale model comparison

© 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 22(2016), 12 vom: 01. Dez., Seite 3967-3983
1. Verfasser: Prestele, Reinhard (VerfasserIn)
Weitere Verfasser: Alexander, Peter, Rounsevell, Mark D A, Arneth, Almut, Calvin, Katherine, Doelman, Jonathan, Eitelberg, David A, Engström, Kerstin, Fujimori, Shinichiro, Hasegawa, Tomoko, Havlik, Petr, Humpenöder, Florian, Jain, Atul K, Krisztin, Tamás, Kyle, Page, Meiyappan, Prasanth, Popp, Alexander, Sands, Ronald D, Schaldach, Rüdiger, Schüngel, Jan, Stehfest, Elke, Tabeau, Andrzej, Van Meijl, Hans, Van Vliet, Jasper, Verburg, Peter H
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article land-use allocation land-use change land-use model uncertainty map comparison model intercomparison model variation
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520 |a © 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. 
520 |a Model-based global projections of future land-use and land-cover (LULC) change are frequently used in environmental assessments to study the impact of LULC change on environmental services and to provide decision support for policy. These projections are characterized by a high uncertainty in terms of quantity and allocation of projected changes, which can severely impact the results of environmental assessments. In this study, we identify hotspots of uncertainty, based on 43 simulations from 11 global-scale LULC change models representing a wide range of assumptions of future biophysical and socioeconomic conditions. We attribute components of uncertainty to input data, model structure, scenario storyline and a residual term, based on a regression analysis and analysis of variance. From this diverse set of models and scenarios, we find that the uncertainty varies, depending on the region and the LULC type under consideration. Hotspots of uncertainty appear mainly at the edges of globally important biomes (e.g., boreal and tropical forests). Our results indicate that an important source of uncertainty in forest and pasture areas originates from different input data applied in the models. Cropland, in contrast, is more consistent among the starting conditions, while variation in the projections gradually increases over time due to diverse scenario assumptions and different modeling approaches. Comparisons at the grid cell level indicate that disagreement is mainly related to LULC type definitions and the individual model allocation schemes. We conclude that improving the quality and consistency of observational data utilized in the modeling process and improving the allocation mechanisms of LULC change models remain important challenges. Current LULC representation in environmental assessments might miss the uncertainty arising from the diversity of LULC change modeling approaches, and many studies ignore the uncertainty in LULC projections in assessments of LULC change impacts on climate, water resources or biodiversity 
650 4 |a Journal Article 
650 4 |a land-use allocation 
650 4 |a land-use change 
650 4 |a land-use model uncertainty 
650 4 |a map comparison 
650 4 |a model intercomparison 
650 4 |a model variation 
700 1 |a Alexander, Peter  |e verfasserin  |4 aut 
700 1 |a Rounsevell, Mark D A  |e verfasserin  |4 aut 
700 1 |a Arneth, Almut  |e verfasserin  |4 aut 
700 1 |a Calvin, Katherine  |e verfasserin  |4 aut 
700 1 |a Doelman, Jonathan  |e verfasserin  |4 aut 
700 1 |a Eitelberg, David A  |e verfasserin  |4 aut 
700 1 |a Engström, Kerstin  |e verfasserin  |4 aut 
700 1 |a Fujimori, Shinichiro  |e verfasserin  |4 aut 
700 1 |a Hasegawa, Tomoko  |e verfasserin  |4 aut 
700 1 |a Havlik, Petr  |e verfasserin  |4 aut 
700 1 |a Humpenöder, Florian  |e verfasserin  |4 aut 
700 1 |a Jain, Atul K  |e verfasserin  |4 aut 
700 1 |a Krisztin, Tamás  |e verfasserin  |4 aut 
700 1 |a Kyle, Page  |e verfasserin  |4 aut 
700 1 |a Meiyappan, Prasanth  |e verfasserin  |4 aut 
700 1 |a Popp, Alexander  |e verfasserin  |4 aut 
700 1 |a Sands, Ronald D  |e verfasserin  |4 aut 
700 1 |a Schaldach, Rüdiger  |e verfasserin  |4 aut 
700 1 |a Schüngel, Jan  |e verfasserin  |4 aut 
700 1 |a Stehfest, Elke  |e verfasserin  |4 aut 
700 1 |a Tabeau, Andrzej  |e verfasserin  |4 aut 
700 1 |a Van Meijl, Hans  |e verfasserin  |4 aut 
700 1 |a Van Vliet, Jasper  |e verfasserin  |4 aut 
700 1 |a Verburg, Peter H  |e verfasserin  |4 aut 
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