Marijn van der Velde
Marijn van der Velde
Many men go fishing all of their lives without knowing that it is not fish they are after -  Henry David Thoreau

Research Interests

My research focuses on the management and interactions of agriculture and natural resources under increasing societal demands and climate change including extreme events. I am employed as a Scientific Officer at the European Commission - Joint Research Centre (DG JRC). 

Our activities centre on the operational forecasting of national crop yields with the MARS Crop Yield Forecasting System with a special focus on the European Union and neighbourhood countries. These forecasts are published monthly in the MARS Bulletin. For an overview of our activities check out these 5 short videos.

Besides investigating the quality of our forecasts - with the aim to improve them - by e.g. better linking crop yield and weather variability, I am also involved in large-scale assessments of crop growth, food production, agricultural water and nutrient use, soil management (nutrients and carbon), bio-energy, and their impacts on the environment. 
DG JRC Ispra
I have a particular interest in better understanding the interaction of farm management, climate change, and crop production across different agricultural systems.

I am also active in evaluating crowd-sourcing applications including the mining of web search data for agro-environmental applications, as well as citizen science applications for agricultural monitoring, particularly within the H2020 LandSense project.

For an overview of my publications see my Scopus ID, my ResearcherID, and my Google Scholar profile. Here's is my LinkedIn page.

Peer-reviewed publications

[67] T. Ben-Ari, J. Boe, P. Ciais, R. Lecerf, M. van der Velde & Makowski, D., 2018. Causes and implications of the unforeseen 2016 extreme yield loss in the breadbasket of France. Nature Communications, 9, Article number 1627, doi:10.1038/s41467-018-04087-x.

[66] R. Lecerf, R., Ceglar, A., Lopez-Lozano, R.,
Van der Velde, M. & Baruth, B., 2018. Assessing the information in crop model and meteorological indicators to forecast crop yield over Europe. Agricultural Systems, doi:10.1016/j.agsy.2018.03.002. Virtual Special Issue: MARS Bulletin 25 years.

[65] J. Balkovič, R. Skalský, C. Folberth, N. Khabarov, E. Schmid, M. Madaras, M. Obersteiner and M. van der Velde2018. Impacts and uncertainties of +2°C of climate change and soil degradation on European crop calorie supply. Earth's Future, doi:10.1002/2017EF000629.

[64] R. van Zelm, M. van der Velde, J.
Balkovič, M. Čengić, P.M.F. Elshout, T. Koellner, M. Núñez, M. Obersteiner, E. Schmid, M.A.J. Huijbregts, 2017. Spatially explicit life cycle assessment for soil erosion from global crop production. Ecosystem Services, doi:10.1016/j.ecoser/2017.08.015.

[63] P. Golding, S. Kapadia, S. Naylor, J. Schulz, H.R. Maier, U. Lall and M. van der Velde, 2017. Framework for minimising the impact of regional shocks on global food security using multi-objective ant colony optimisation. Environmental Modelling & Software, 95, 303-319, doi:10.1016/j.envsoft.2017.06.004.

[62] R. Sikkema, J.F. Dallemand, C.T. Matos, M. van der Velde and J. San-Miguel-Ayanz, 2016. How can the ambitious goals for the EU's future bioeconomy be supported by sustainable and efficient wood sourcing practices? Scandinavian Journal of Forest Research, doi:10.1080/02827581.2016.120228.

[61] C. Folberth, R. Skalský, E. Moltchanova, L.B. Azevedo, J. Balkovič, M. Obersteiner and M. van der Velde2016. Uncertainty in soil data can outweigh climate impact signals in global crop yield simulations. Nature Communications, 7, doi:10.1038/ncomms11872.

[60] F.S. Özbek, A. Leip and M. van der Velde2016. Phosphorous stock changes in agricultural soils: a case study in Turkey. Nutrient Cycling in Agroecosystemsdoi:10.1007/s10705-016-9773-2.

[59] T. Ben-Ari, J. Adrian, T. Klein, P. Calanca, M. van der Velde and D. Makowski, 2016. Identifying indicators for extreme wheat and maize yield losses. Agricultural and Forest Meteorologydoi:10.016/ j.agrformet.2016.01.009.

[58] F. Cherubini, M. Huijbregts, G. Kindermann, R. van Zelm, M. van der Velde, K. Stadler & A.H. Stromman, 2016Global spatially explicit CO2 emission metrics for forest bioenergy. Scientific Reports 6, doi:10.1038/srep20186.

[57] L. See et al., 2016. Mapping human impact using crowdsourcing. In: Mapping Wilderness (eds. S.J. Carver and S. Fritz), dpi: 10.1007/978-94-017-7399-7_6.

[56] A. Ceglar, A. Toreti, R. Lecerf, M. van der Velde and F. Dentener, 2016. Impact of meteorological drivers on regional intern-annual crop yield variability in FranceAgricultural and Forest Meteorology, doi:10.016/j.agrformet.2015.10.004.

[55] A. Bussay, M. van der Velde, D. Fumagalli and L. Seguini, 2015. Improving operational maize yield forecasting in Hungary. Agricultural Systems,  doi:10.1016/j.agsy.2015.10.001.

[54] D. Frank et al., 2015. Effects of climate extremes on the terrestrial carbon cycle: concepts, processes and potential future impacts. Global Change Biology, doi:10.1111/gcb.12916.

[53] P.M.F. Elshout, R. van Zelm, J. Balkovic, M. Obersteiner, E. Schmid, R. Skalsky, M. van der Velde and M.A.J. Huijbregts, 2015. Greenhouse-gas payback times for crop-based biofuels. Nature Climate Change, doi:10.1038/nclimate2642.

[52] D. Perrone, G. Hornberger, O. van Vliet and M. van der Velde2015A review of the United States' past and projected water use. JAWRA - Journal of American Water Resources Association, doi:10.1111/1752-1688.12301.

[51] S. Fritz et al., 2015. Mapping global cropland and field size. Global Change Biology, doi:10.1111/gcb.12838.

[50] M. van Oijen, J. Balkovič, C. Beer, D. Cameron, P. Ciais, W. Cramer, T. Kato, M. Kuhnert, R. Martin, R. Myneni, A. Rammig, S. Rolinski, J.-F. Soussana, K. Thonicke, M. van der Velde, and L. Xu, 2014. Impact of droughts on the C-cycle in European vegetation: a probabilistic risk analysis using six vegetation models. Biogeosciences Discussions, 11, 8325-8371, doi:10.5194/bgd-11-8325-2014.

[49] K. Petz,  R. Alkemade, M. Bakkenes, C.J.E. Schulp, M. van der Velde and R. Leemans, 2014. Mapping and modelling trade-offs and synergies between grazing intensity and ecosystem services in rangelands using global-scale datasets and models. Global Environmental Change, 29, 223-234, doi:10.1016/j.gloenvcha.2014.08.007.

[48] S. Hochrainer Stigler,  M. van der Velde, S. Fritz and G. Pflug, 2014. Remote sensing data for managing climate risks: index-based insurance and growth related applications for smallholder farmers in Ethiopia. Climate Risk Management, doi: 10.1016/j.crm.2014.09.002.

[47] L. See, S. Fritz, L. You, N. Ramankutty, M. Herrero, C. Justice, I. Becker-Reshef, P. Thornton, K. Erb, P. Gong, H. Tang, M. van der Velde, P. Ericksen, I. McCallum, F. Kraxner and M. Obersteiner, 2014. Improved global cropland data as an essential ingredient for food security. Global Food Security, doi: 10.1016/j.gfs.2014.10.004.

[46] J. Balkovič, M. van der Velde, R. Skalský, W. Xiong, C. Folberth, N. Khabarov, A. Smirnov, N.D. Mueller and M. Obersteiner, 2014. Global wheat production potentials and management flexibility under the representative concentration pathways. Global and Planetary Change, doi:10.1016/j.gloplacha.2014.08.010.

[45] L. See, D. Schepaschenko, M. Lesiv, I. McCallum, S. Fritz, A. Comber, C. Perger, C. Schill, Y. Zhao, V. Maus, M. A. Siraj, F. Albrecht, A. Cipriani, M. Vakolyuk, A. Garcia. A.H. Rabia, K. Singha, A.A. Marcarini, T. Kattenborn, H. Hazarika, M. Schepaschenko, M. van der Velde, F. Kraxner and M. Obersteiner, 2014. Building a hybrid land cover maps with crowdsourcing and geographically weighted regression. ISPRS Journal of Photogrammetry and Remote Sensing, doi: 10.1016/j.isprsjprs.2014.06.016

[44] W. Xiong, M. van der Velde, I.P. Holman, J. Balkovič, E. Lin, R. Skalský, C. Porter, J. Jones, N. Khabarov and M. Obersteiner, 2014. Can climate-smart agriculture reverse the recent slowing of rice yield growth in China? Agriculture, Ecosystems & Environment, 196, 125-136, doi:10.1016/j.agee.2014.06.014

[43] R. van Zelm, P.A.N. Muchada, M. van der Velde, G. Kindermann, M. Obersteiner & M.A.J. Huijbregts, 2014. Impacts of biogenic CO2 emissions on human health and terrestrial ecosystems: the case of increased wood extraction for bioenergy production on a global scale. GCB Bioenergy, doi: 10.1111/gcbb.12153.

[42] A. Vrieling, J.C.B. Hoejdes & M. van der Velde, 2014. Towards large-scale monitoring of soil erosion in Africa: Accounting for the dynamics of rainfall erosivity. Global and Planetary Change, doi:10.1016/j.glopacha.2014.01.009.

[41] M. van der Velde, C. Folberth, J. Balkovič, P. Ciais, S. Fritz, I. Janssens, M. Obersteiner, L. See, R. Skalský, W. Xiong, and J Peñuelas, 2014. African crop yield reductions due to increasingly unbalanced Nitrogen and Phosphorus consumption. Global Change Biology, doi:10.1111/gcb.12481. Please find here the  related press release!

[40] G.M. Foody, L. See, S. Fritz, M. van der Velde, C. Perger, C. Schill, D.S. Boyd & A. Comber, 2014. Accurate attribute mapping from volunteered geographic information: issues of volunteer quantity and quality. The Cartographic Journal, doi:10.1179/1743277413Y.0000000070.

[39] J. Peñuelas, B. Poulter, J. Sardans, P. Ciais, M. van der Velde, L. Bopp, O. Boucher, Y. Godderis, P. Hinsinger, J. Llusia, E. Nardin, S. Vicca, M. Obersteiner, & I.A. Janssens, 2013. Human-induced nitrogen-phosphorus imbalances alter natural and managed ecosystems across the globe. Nature Communications, 4, article nr. 2934, doi:10.1038/ncomms3934.

[38] W. Xiong, J. Balkovič, M. van der Velde, X. Zhang, R.C. Izaurralde, R. Skalský, E. Lin, N. Mueller & M. Obersteiner2013. A calibration procedure to improve global rice yield simulations with EPIC. Ecological Modelling, 273, 128-139. doi:10.1016/j.ecolmodel.2013.10.026. 

[37] M. Obersteiner, J. Peñuelas, P. Ciais, M. van der Velde & I.A. Janssens, 2013. The phosphorus trilemma. Nature Geoscience, 6, 897-898, doi:10.1038/ngeo1990 [Commentary]. Here's a related interview posted on IIASA's research blog NEXUS. 

[36] F.G.A. Verheijen, S. Jeffery, M. van der Velde, V. Penížek, M. Beland, A.C. Bastos & J.J. Keizer, 2013. Reductions in soil surface albedo as a function of biochar application rate: implications for global radiative forcing. Environmental Research Letters, 8, 044008, doi:10.1088/1748-326/8/4/044008 [OPEN ACCESS]. 

[35] M. Reichstein, M. Bahn, P. Ciais, D. Frank, M.D. Mahecha, S.I. Seneviratne, J. Scheischler, C. Beer, N. Buchmann, D.C. Frank, D. Papale, A. Rammig, P. Smith, K. Thonicke, M. van der Velde, S. Vicca, A. Walz & M. Wattenbach, 2013. Climate extremes and the carbon cycle. Nature, 287–295, doi:10.1038/nature12350. Also, have a look at this beautifully illustrated Carbo-Extreme brochure!

[34] L. See, A. Comber, C. Salk, S. Fritz, M. van der Velde, C. Perger, C. Schill, I. McCallum, F. Kraxner & M. Obersteiner, 2013. Comparing the quality of crowdsourced data contributed by expert and non-experts. PLoS ONE 8(7): e69958. doi:10.1371/journal.pone.0069958 [OPEN ACCESS].

[33] J. Balkovič, M. van der Velde, E. Schmid, R. Skalský, N. Khabarov, M. Obersteiner, B. Stürmer and W. Xiong, 2013. Pan-European crop modelling with EPIC: Implementation, up-scaling and regional crop yield validation. Agricultural Systems, doi:10.1016/j.agsy.2013.05.008.

[32] H. Ju, M. van der Velde, E. Lin, W. Xiong and Y Li, 2013. The impacts of climate change on agricultural production systems in China. Climatic Change, doi: 10.1007/s10584-013-0803-7

[31] L. See, S. Fritz, C. Perger, M. van der Velde, F. Albrecht, I. McCallum, D. Schepaschenko, M. Obersteiner & C. Schill, 2013. Urban Geo-Wiki: a crowdsourcing tool to improve urban land cover (119-143 pp) in [30] Citizen e-participation in urban governance: crowdsourcing and collaborative creativity (eds. C.N. Silva), IGI Global, 2013, doi:10.4018/978-1-4666-4169-3. 

[30] G. M. Foody, L. See, S. Fritz, M. Van der Velde, C. Perger, C. Schill, D. S. Boyd, 2013. Assessing the accuracy of volunteered geographic information arising from multiple contributors to an internet based collaborative project. Transactions in GIS, doi: 10.1111/tgis.12033.

[29] S. Jeffery, F.G.A. Verheijen, A.C. Bastos & M. van der Velde2013. A comment on 'Biochar and its effects on plant productivity and nutrient cycling: a meta-analysis': on the importance of acurate reporting in supporting a fast-moving research field with policy implications. GCB-Bioenergy, doi:10.1111/gcbb.12076 [Comment].

[28] M. van der Velde, L. See, L. You, J. Balkovič, S. Fritz, N. Khabarov, M. Obersteiner and S. Wood, 2013. Affordable nutrient solutions for improved food security as evidenced by crop trials. PLoS ONE 8(4): e60075. doi:10.1371/journal.pone.0060075 [OPEN ACCESS].

[27] A. Comber, L. See, S. Fritz, M. van der Velde, C. Perger & G.M. Foody, 2013. Using control data to determine the reliability of volunteered geographic information about land cover. International Journal of Applied Earth Observation and Geoinformation, 23: 37–48, doi:10.1016/j.jag.2013.11.002.

[26] S. Fritz, L. See, M. van der Velde, R.A. Nalepa, C. Perger, C. Schill, I. McCallum, D. Schepaschenko, F. Kraxner, X. Cai, X. Zhang, S. Ortner, R. Hazarika, A. Cipriani, C. Di Bella, A.H. Rabia, A. Garcia, M. Vakolyuk, K. Singha, M.E. Beget, S. Erasmi, F. Albrecht, B. Shaw & M. Obersteiner, 2013. Downgrading recent estimates of land available for biofuel production. Environmental Science & Technology, doi:10.1021/es303141.

[25] S. Fritz, L. See, L. You, C. Justice, I. Becker-Reshef, L. Bydekerke, R. Cumani, P. Defourny, K. Erb, J. Foley, S. Gilliams, P. Gong, M. Hansen, T. Hertel, M. Herold, M. Herrero, F. Kayitakire, J. Latham, O. Leo, I. McCallum, M. Obersteiner, N. Ramankutty, J. Rocha, H. Tang, P. Thornton, C. Vancutsem, M. van der Velde, S. Wood & C. Woodcock, 2013. The need for improved maps of global cropland. EOS 94 (3), 31-32, doi:10.1002/2013EO030006

[24] P.S. Bindraban, M. van der Velde, L Ye, M. van den Berg, S. Materechera, D. Innocent Kiba, L. Tamene, K.V. Rangnarsdóttir, R. Jongschaap, M. Hoogmoed, W. Hoogmoed, C. van den Beek and G. van Lynden, 2012. Assessing the impact of soil degradation on food production. Current Opinion in Environmental Sustainability, doi:10.1016/j.cosust.2012.09.015.

[23] M. van der Velde, L. See & S. Fritz, 2012. Citizens add to satellite forest maps. Nature 490, 342, doi:10.1038/490342a [Correspondence].

[Great cartoon drawn by S. Harris (who holds the Copyright) inspired by our Nature Correspondence on the contribution citizens can make to enhance forest satellite data (see above).]

[22] C. F. Zang, J. Liu, M. van der Velde & F. Kraxner, 2012. Assessment of spatial and temporal patterns of green and blue water flows under natural conditions in inland river basins in Northwest China. Hydrol. Earth Syst. Sci., 16, 2859-2870 [OPEN ACCESS].

[21] M. van der Velde, L. See, S. Fritz, F.G.A. Verheijen, N. Khabarov & M. Obersteiner, 2012. Generating crop calendars with Web search data. Environmental Research Letters, 7 024022, doi:10.1088/1748-9326/7/2/024022 [OPEN ACCESS]. Here's a review!

[20] M. van der Velde, L. See & S. Fritz, 2012. Soil remedies for small-scale farming. Nature 484, 318, doi:10.1038/484318c [Correspondence].

[19] S. Fritz, I. McCallum, C. Schill, C. Perger, L. See, D. Schepaschenko, M. van der Velde, F. Kraxner & M. Obersteiner, 2012. Geo-Wiki: An online platform for improving global land cover. Environmental Software & Modelling, DOI: 10.1016/j.envsof.2011.11.015.

[18] M. van der Velde, F.N. Tubiello, A. Vrieling & F. Bouraoui, 2012. Impacts of extreme weather on wheat and maize in France: evaluating regional crop simulations against observed data. Climatic Change, 113 (3-4), 751-765, DOI: 10.1007/s10584-011-0368-2 [OPEN ACCESS].

[17] S. Fritz, L. See, I. McCallum, C. Schill, M. Obersteiner, M. van der Velde, H. Boettcher, P. Havlik & F. Achard, 2011. Highlighting continued uncertainty in global land cover maps for the user community. Environmental Research Letters, 6, 044005, doi:10.1088/1748-9326/6/4/044005 [OPEN ACCESS].

[16] F.N. Tubiello and M van der Velde, 2011. Land and water use options for climate change adaptation and mitigation for agriculture. SOLAW - Background Thematic Report - TR04A, 38 pp. for FAO's Flagship publication SOLAW - The State of World's Land and Water Resources for Food and Agriculture featured in Nature.

[15] S. Jeffery, F.G.A. Verheijen, M. van der Velde, & A.C. Bastos, 2011. A quantitative review of the effects of biochar application to soils on crop productivity using meta-analysis. Agriculture, Ecosystems & Environment, 144, 175-187, doi:10.1016/j.agee.2011.08.015.

[14] M. van der Velde, G. Wriedt & F. Bouraoui, 2010. Estimating irrigation use and effects on maize yield during the 2003 heatwave in France. Agriculture, Ecosystems & Environment, 135, 90-97, doi:10.1016/j.agee.2009.08.017.

[13] G. Wriedt, M. van der Velde, A. Aloe & F. Bouraoui, 2009. Estimating irrigation requirements in Europe. Journal of Hydrology, 373 (3-4), 527-544, doi:10.1016/j.jhydrol.2009.05.018. DATA AVAILABLE HERE

[12] M. van der Velde, S. Green & B. Clothier, 2009. Nocturnal sap flow measurements in squash using the T-max method: Transpiration or Rehydration? ISHS Acta Horticulturae, 846, 113-120.

[11] Gee, G.W., B.D. Newman, S.R. Green, R. Meissner, H. Rupp, Z.F. Zhang, J.M. Keller, W.J. Waugh, M. van der Velde & J. Salazar, 2009. Passive wick fluxmeters: Design considerations and field applications. Water Resources Research, 45, W04420, doi:10.1029/2008WR007088.

[10] G. Wriedt, M. van der Velde, A. Aloe & F. Bouraoui, 2009. A European irrigation map for spatially distributed agricultural modelling. Agricultural Water Management, 96, 771-789. doi:10.1016/j.agwat.2008.10.012. DATA AVAILABLE HERE

[9] M. van der Velde,  F. Bouraoui & A. Aloe, 2009. Pan-European regional-scale modelling of water and N efficiencies of rapeseed cultivation for biodiesel production. Global Change Biology, 15, 24-37. doi: 10.1111/j.1365-2486.2008.01706.x.

[8] B.E. Clothier, S.R. Green, B.H. Robinson, T. Thayalakumaran, D.R. Scotter, I. Vogeler, T.M. Mills, M. Deurer, M. van der Velde & Th. Granel, 2008. Chapter 26: Contaminants in the rootzone: Bioavailability, uptake and transport, and their implications for remediation. Developments in Soil Science, 32, 633-655.

[7] M. van der Velde, M. Vakasiuola, S.R. Green, V.T. Manu, V. Minonesi, M. Vanclooster & B.E. Clothier, 2007. Climatic variation, recharge and freshwater lens salinity of a coral atoll in the Pacific Ocean in  Sanford, W., Langevin, C., Polemio, M., and Povinec. P., eds., 2007, A new focus on groundwater-seawater interactions: IAHS Redbook Publication 312, Oxfordshire, United Kingdom, p. 244-255.

[6] G. Pochet, M. van der Velde, M. Vanclooster & B. Delvaux, 2007. Hydric properties of high charge, halloysitic clay soils from the tropical South Pacific region. Geoderma, 138, 96-109.

[5] M. van der Velde, S.R. Green, M. Vanclooster & B.E. Clothier, 2007. Sustainable development in small island developing states: Agricultural intensification, economic development, and freshwater resources management on the coral atoll of Tongatapu. Ecological Economics, 61, 456-468.

[4] M. van der Velde, M. Javaux, M. Vanclooster & B.E. Clothier, 2006. El Niño-Southern Oscillation determines the salinity of the freshwater lens under a coral atoll in the Pacific Ocean. Geophysical Research Letters, 33, L21403, doi:10.1029/2006GL027748.

[3] M. van der Velde, S.R. Green, M. Vanclooster & B.E. Clothier, 2006. Transpiration of squash under a tropical maritime climate. Plant and Soil 280 (1-2), 323-337.

[2] M. van der Velde, S.R. Green, G.W. Gee, M. Vanclooster & B.E. Clothier, 2005. Evaluation of drainage and water flux measurements with passive suction and non-suction water flux meters in a volcanic clay soil under tropical conditions. Vadoze Zone Journal 4, 1201-1209.

[1] B. Robinson, S. Green, T. Mills, B. Clothier, M. van der Velde, R. Laplane, L. Fung, M. Deurer, S. Hurst, T. Thayalakumaran, & C. van den Dijssel, 2003. Phytoremediation: using plants as biopumps to improve degraded environments. Australian Journal of Soil Research, 41(3), 599-611.

Previous Affiliations

Research Scholar and Group Leader at the International Institute for Applied Systems Analysis (IIASA)

Research Scientist (CA-IV) at the European Commission - Joint Research Centre in Ispra, Italy.

NOAA Climate and Global Change Postdoctoral Fellow at the Lamont-Doherty Earth Observatory of the Earth Institute, Columbia University, New York, USA.

Ministry of Agriculture of Tonga, Tongatapu, Kingdom of Tonga (during PhD).

University of Louvain, Louvain-la-Neuve, Belgium (DEA & PhD).

Plant and Food Research (previously HortResearch), Palmerston North, New Zealand (during MSc & PhD).

University of Amsterdam, Amsterdam, The Netherlands (MSc).


2016 - I was part of the PhD-committee of Bezhad Sharif at the University of Aarhus (Denmark). 

2015 - MSc students project at the University of Adelaide (Australia) on regional shocks to global trade (video) I co-supervised awarded with South Australia's Sustainable Engineering Society's Award.

2014 - I was part of the PhD-committee of Ligia B. Azevedo at the  University of Nijmegen (the Netherlands). 

2013 - Check out this beautifully illustrated brochure which was made as part of the Carbo-Extreme project.  

2013 - A short essay I wrote for Science's NextGen VOICES on 'the biggest challenge facing your country today and how you will use science to address it' in the form of an 'inaugural address' was selected for online publication in Science.

2012 - I gave a workshop on 'Integrated Ecosystem Modelling under Climate Change Conditions' in Quito, Ecuador - within the AndesPlus project.

2010 - Consultant for FAO's first flagship publication on the global status of land and water resources: the State of Land and Water Resources for Food and Agriculture (SOLAW) together with F.N. Tubiello.

2009 - JRC/IES Excellence Awards: Best Young Scientist.

2009 - A popular article on Food for Thought: Apples for Virtual Water WISPAS 104

2008 - Invited speaker in the plenary session of the 'WFD meets CAP: Towards the First River Basin Management Plan' conference, in Bonn, Germany speaking on agricultural in a changing environment, particularly on biofuels.

2008 - JRC Excellence Awards: Best Peer-Reviewed Scientific Paper (Global Change Biology publication).

2008 - Part of JRC's Biofuel Task Force.

2008 - Contribution to Newsletter XVII of the  'Pacific Partnership Initiative on Sustainable Water Management'.  *** CALL for GROUNDWATER SALINITY DATA underneath CORAL ATOLLS ***

2007 - Interviewed on Dutch National Radio (de Ochtenden) on the impacts of climate change on small islands after the release of the 4th IPCC report.

2006 - Invited scientific expert for a UNEP GEF/STAP workshop on SIDS, Groundwater and Interlinkages held in Trinidad & Tobago.

2004 - A popular article about my PhD research in Tonga: Pumping Pumpkins, WISPAS 88

2003 - A popular article about my PhD research in Tonga: After Fire Comes Rain: Drainage in Tonga, WISPAS 86

2003 - Interviewed by Matangitonga, Tonga's leading opinion magazine. 

Reviewed papers for the Australian Journal of Soil Research, Plant and Soil,  Hydrology and Earth System Sciences, Vadose Zone Journal, Agricultural Water Management, Ecological Economics, Field Crops Research, Hydrogeology Journal, Agricultural and Food Science, Journal of Cleaner Production, Journal of Hydrology, Climatic Change, Global and Planetary Change, Water, Environmental Research Letters and Global Change Biology.

                                     Please contact me for any questions or reprints! Its my full name without spaces at

Cool/Interesting Stuff I Like

The Straight Dope - brilliant answers to hilarious questions!

A great & incredible read is Quicksilver the first book of the Baroque Cycle by Neal Stephenson. 

Open Source Ecology - if you're looking for an open source tractor.

Cool tree-house!