Marijn van der Velde
Biographic Data
| ID | 6486278 |
|---|---|
| NAME | Marijn van der Velde |
| GIVEN NAMES | Marijn |
| FAMILY NAME | van der Velde |
| SIGNATURE | VAN DER VELDE M |
| AFFILIATIONS | International Institute for Applied Systems Analysis |
| ORCID | 0000-0002-9103-7081 |
| VERIFIED | Yes |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 9 |
| AUTHOR COUNT | 13 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1984 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 2 |
Towards optimal anticipatory action: Maximizing the effectiveness of agricultural early warning systems with operations research
Policy relevant crop diversity monitoring based on earth observation and farmers’ declarations
Comprehensive, wall-to-wall, evaluation of cropping systems and therefore crop diversity using Earth Observation (EO) data is becoming reality. Agricultural policies such as the Common Agricultural Policy (CAP) in the European Union (EU) stimulate more diverse crop-mixes. We compute a new EU-wide overview of crop diversification for 2018 using the Shannon diversity index based on 10 m resolution EO crop map. For the EU as a whole, the effective n…
Pl@ntNet Crops: Merging citizen science observations and structured survey data to improve crop recognition for agri-food-environment applications
We present a new application to recognize 218 species of cultivated crops on geo-tagged photos, ‘Pl@ntNet Crops’. The application and underlying algorithms are developed using more than 750k photos voluntarily collected by Pl@ntNet users. The app is then enriched by data and photos coming from the European Union’s (EU) Land Use and Coverage Area frame Survey (LUCAS). During five tri-annual LUCAS campaigns from 2006 to 2018, 242 476 close-up ‘cove…
Extreme lows of wheat production in Brazil
Wheat production in Brazil is insufficient to meet domestic demand and falls drastically in response to adverse climate events. Multiple, agro-climate-specific regression models, quantifying regional production variability, were combined to estimate national production based on past climate, cropping area, trend-corrected yield, and national commodity prices. Projections with five CMIP6 climate change models suggest extremes of low wheat producti…
Time-varying impact of climate on maize and wheat yields in France since 1900
Climate services that can anticipate crop yields can potentially increase the resilience of food security in the face of climate change. These services are based on our understanding of how crop yield anomalies are related to climate anomalies, yet the share of global crop yield variability explained directly by climate factors is largely variable between regions. In Europe, France has been a major crop producer since the beginning of the 20th Ce…
Mapping and modelling trade-offs and synergies between grazing intensity and ecosystem services in rangelands using global-scale datasets and models
Climate extremes and the carbon cycle
Reductions in soil surface albedo as a function of biochar application rate: Implications for global radiative forcing
Biochar can be defined as pyrolysed (charred) biomass produced for application to soils with the aim of mitigating global climate change while improving soil functions. Sustainable biochar application to soils has been estimated to reduce global greenhouse gas emissions by 71-130 Pg CO2-Ce over 100 years, indicating an important potential to mitigate climate change. However, these estimates ignored changes in soil surface reflection by the applic…
Generating crop calendars with Web search data
This paper demonstrates the potential of using Web search volumes for generating crop specific planting and harvesting dates in the USA integrating climatic, social and technological factors affecting crop calendars. Using Google Insights for Search, clear peaks in volume occur at times of planting and harvest at the national level, which were used to derive corn specific planting and harvesting dates at a weekly resolution. Disaggregated to stat…
Assessing the impact of soil degradation on food production
Highlighting continued uncertainty in global land cover maps for the user community
In the last 10 years a number of new global datasets have been created and new, more sophisticated algorithms have been designed to classify land cover. GlobCover and MODIS v.5 are the most recent global land cover products available, where GlobCover (300 m) has the finest spatial resolution of other comparable products such as MODIS v.5 (500 m) and GLC-2000 (1 km). This letter shows that the thematic accuracy in the cropland domain has decreased…
Sustainable development in small island developing states: Agricultural intensification, economic development, and freshwater resources management on the coral atoll of Tongatapu
Report No. 3: Van der Velde, "Coutumes Barbares" (20 July 1918)
M. Van der Velde, Thomas Q. Reefe, Report No. 3: Van der Velde, "Coutumes Barbares" (20 July 1918), The International Journal of African Historical Studies, Vol. 17, No. 3, History and Ritual of the Luba Empire (1984), pp. 498-512
Report No. 3: Van der Velde, "Coutumes Barbares" (20 July 1918)
M. Van der Velde, Thomas Q. Reefe, Report No. 3: Van der Velde, "Coutumes Barbares" (20 July 1918), The International Journal of African Historical Studies, Vol. 17, No. 3, History and Ritual of the Luba Empire (1984), pp. 498-512
Sustainable development in small island developing states: Agricultural intensification, economic development, and freshwater resources management on the coral atoll of Tongatapu
Highlighting continued uncertainty in global land cover maps for the user community
In the last 10 years a number of new global datasets have been created and new, more sophisticated algorithms have been designed to classify land cover. GlobCover and MODIS v.5 are the most recent global land cover products available, where GlobCover (300 m) has the finest spatial resolution of other comparable products such as MODIS v.5 (500 m) and GLC-2000 (1 km). This letter shows that the thematic accuracy in the cropland domain has decreased…
Generating crop calendars with Web search data
This paper demonstrates the potential of using Web search volumes for generating crop specific planting and harvesting dates in the USA integrating climatic, social and technological factors affecting crop calendars. Using Google Insights for Search, clear peaks in volume occur at times of planting and harvest at the national level, which were used to derive corn specific planting and harvesting dates at a weekly resolution. Disaggregated to stat…
Assessing the impact of soil degradation on food production
Climate extremes and the carbon cycle
Reductions in soil surface albedo as a function of biochar application rate: Implications for global radiative forcing
Biochar can be defined as pyrolysed (charred) biomass produced for application to soils with the aim of mitigating global climate change while improving soil functions. Sustainable biochar application to soils has been estimated to reduce global greenhouse gas emissions by 71-130 Pg CO2-Ce over 100 years, indicating an important potential to mitigate climate change. However, these estimates ignored changes in soil surface reflection by the applic…
Mapping and modelling trade-offs and synergies between grazing intensity and ecosystem services in rangelands using global-scale datasets and models
Time-varying impact of climate on maize and wheat yields in France since 1900
Climate services that can anticipate crop yields can potentially increase the resilience of food security in the face of climate change. These services are based on our understanding of how crop yield anomalies are related to climate anomalies, yet the share of global crop yield variability explained directly by climate factors is largely variable between regions. In Europe, France has been a major crop producer since the beginning of the 20th Ce…
Extreme lows of wheat production in Brazil
Wheat production in Brazil is insufficient to meet domestic demand and falls drastically in response to adverse climate events. Multiple, agro-climate-specific regression models, quantifying regional production variability, were combined to estimate national production based on past climate, cropping area, trend-corrected yield, and national commodity prices. Projections with five CMIP6 climate change models suggest extremes of low wheat producti…
Pl@ntNet Crops: Merging citizen science observations and structured survey data to improve crop recognition for agri-food-environment applications
We present a new application to recognize 218 species of cultivated crops on geo-tagged photos, ‘Pl@ntNet Crops’. The application and underlying algorithms are developed using more than 750k photos voluntarily collected by Pl@ntNet users. The app is then enriched by data and photos coming from the European Union’s (EU) Land Use and Coverage Area frame Survey (LUCAS). During five tri-annual LUCAS campaigns from 2006 to 2018, 242 476 close-up ‘cove…
Policy relevant crop diversity monitoring based on earth observation and farmers’ declarations
Comprehensive, wall-to-wall, evaluation of cropping systems and therefore crop diversity using Earth Observation (EO) data is becoming reality. Agricultural policies such as the Common Agricultural Policy (CAP) in the European Union (EU) stimulate more diverse crop-mixes. We compute a new EU-wide overview of crop diversification for 2018 using the Shannon diversity index based on 10 m resolution EO crop map. For the EU as a whole, the effective n…
Towards optimal anticipatory action: Maximizing the effectiveness of agricultural early warning systems with operations research
Ecology (9 works) · Environmental Science (9 works) · Geography (9 works) · Agriculture (7 works) · Biology (7 works) · Climate change (5 works) · Crop (5 works) · Business (4 works) · Computer Science (4 works) · Environmental resource management (4 works)