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Abstract Global palm oil production has greatly increased in recent years with the adoption of renewable energy policies by the E.U. and U.S.A. and growing demand for its use in food, biodiesel, and other commodities. Indonesia, the world's largest oil palm producer, has leased large tracts of forested and tribal lands as new concessions, thereby expanding oil palm plantations. While previous studies have focused on some of the important social and environmental consequences of this process, the full suite of potential environmental impacts from land conversion and cultivation remains poorly understood. Here we quantify these impacts in terms of forest loss and fragmentation, CO 2 emissions from land use change, and freshwater pollution from fertilizer application. Within all concession types, forest cover decreased by 20% and forest fragmentation increased by 44%, both of which are significantly higher than in comparable non-concession areas. We also assess to what extent CO 2 emissions and freshwater pollution are attributable to increasing palm oil demand abroad. We find that four-fifths of Indonesia's palm oil production is for export markets and that 66% of this is destined for just eight countries – India, China, Pakistan, Malaysia, Italy, Egypt, Bangladesh, and the United Kingdom. Examining these multiple impacts highlights the importance of remote policies and consumption patterns in dictating local production decisions in a telecoupled world. This work demonstrates that - in order to be truly sustainable - bioenergy initiatives must ensure that adverse environmental impacts (and the demands that drive them) are reduced globally and not simply displaced elsewhere. Highlights • Oil palm plantations have had profound socio-environmental impacts in Indonesia. • We quantify impacts including forest loss, CO 2 emissions, and freshwater pollution. • Oil palm concessions enhance all of these environmental consequences. • Four-fifths of Indonesia's palm oil production is for export markets. • Sustainable bioenergy must reduce impacts globally and not displace them elsewhere. [ABSTRACT FROM AUTHOR]

The escalating human demand for food, water, energy, fibres and minerals have resulted in increasing commercial pressures on land and water resources, which are partly reflected by the recent increase in transnational land investments. Studies have shown that many of the land-water issues associated with land acquisitions are directly related to the areas of energy and food production. This paper explores the land-water-energy-food nexus in relation to large-scale farmland investments pursued by investors from European countries. The analysis is based on a “resource assessment approach” which evaluates the linkages between land acquisitions for agricultural (including both energy and food production) and forestry purposes, and the availability of land and water in the target countries. To that end, the water appropriated by agricultural and forestry productions is quantitatively assessed and its impact on water resource availability is analysed. The analysis is meant to provide useful information to investors from EU countries and policy makers on aspects of resource acquisition, scarcity, and access to promote responsible land investments in the target countries. [ABSTRACT FROM AUTHOR]

Currently, a large portion of grain production is funneled into animal feed despite widespread hunger and undernutrition. In the present work we: (i) estimated the area, water and carbon footprints of animal-source proteins (AP) obtained from intensive farming systems and compared them with those from producing an equivalent amount of plant-source proteins (PP); (ii) postulated a set of straightforward hypotheses to recover environmental resources by cutting down a surplus in the per capita protein intake from three representative regions where intensive animal farming systems account for a great share of animal food production. Our major findings revealed that AP from intensive farming were approximately 2.4 to 33 more expensive in terms of area and water demand and 2.4 to 240 more pollutant in terms of greenhouse gas emissions when compared with PP. Environmental recoveries varied widely according to the hypothesized scenarios, but even the lowest estimates suggested remarkable results. Whether additional proteins supply would be required, crops with large protein content as peas, chickpeas, soybeans, and lupins could help to meet food security, while better compromise between dietary habits and environmental protection could be reached in rich countries by a moderate consumption of meat produced with non-feed grain systems. [ABSTRACT FROM AUTHOR]

Since small-scale farmers manage most of the cultivated land worldwide, the ongoing shift in systems of production associated with large-scale land acquisitions (LSLAs) may dramatically reshape the world's agrarian landscape, significantly impacting rural populations and their livelihoods. The societal, hydrological and environmental implications resulting from the expansion of large-scale agricultural production, through LSLAs, make their ultimate sustainability questionable. This study, through a literature review, analyses the negative impacts of LSLAs, their hydrological dimension and how they may affect the Sustainable Development Goals (SDGs). The core literature on land and water grabbing is reviewed and systematized using the 17 SDGs as a framework, in order to highlight the relationship between LSLAs and the sustainable development agenda. The magnitude of the global land rush phenomenon and the criticism raised in scholarly research highlight the controversial role that transnational land acquisitions may be playing in the global development agenda. [ABSTRACT FROM AUTHOR]

Agricultural intensification is often seen as a suitable approach to meet the growing demand for agricultural products and improve food security. It typically entails the use of fertilizers, new cultivars, irrigation, and other modern technology. In regions of the world affected by seasonal or chronic water scarcity, yield gap closure is strongly dependent on irrigation (blue water). Global yield gap assessments have often ignored whether the water required to close the yield gap is locally available. Here we perform a gridded global analysis (10 km resolution) of the blue water consumption that is needed annually to close the yield gap worldwide and evaluate the associated pressure on renewable freshwater resources. We find that, to close the yield gap, human appropriation of freshwater resources for irrigation would have to increase at least by 146%. Most study countries would experience at least a doubling in blue water requirement, with 71% of the additional blue water being required by only four crops – maize, rice, soybeans, and wheat. Further, in some countries (e.g., Algeria, Morocco, Syria, Tunisia, and Yemen) the total volume of blue water required for yield gap closure would exceed sustainable levels of freshwater consumption (i.e., 40% of total renewable surface and groundwater resources). [ABSTRACT FROM AUTHOR]

This paper investigates the recent wave of investments in agricultural land, often referred to as land grabbing; a term that not only emphasises the appropriation of resources by investors but also implies a criticism of their potential impacts on livelihoods and ecosystems in the target countries. This phenomenon has increasingly been the focus of public attention as well as a source of concern for NGOs, international institutions, academia and civil society. More specifically, this study investigates the role that the European Union member states play, both collectively and individually, in this wave of acquisitions in agricultural land, by providing a comprehensive overview of the drivers, scope and potential impacts of these land deals. [ABSTRACT FROM AUTHOR]

Abstract: To which extent do wildfires affect runoff production, soil erosion and sediment transport in upland catchments? This transient effect is investigated here by combining data of long term precipitation, sediment yield and wildfire records with a fine resolution spatially distributed modeling approach to flow generation and surface erosion. The model accounts for changes in the structure and properties of soil and vegetation cover by combining the tube-flux approach to topographic watershed partition with a parsimonious parametrization of hydrologic processes. This model is used to predict hydrologic and sediment fluxes for nine small catchments in Saint Gabriel mountains of southern California under control (pre-fire) and altered (post-fire) conditions. Simulation runs using a 45 years record of hourly precipitation show the passage of fire to significantly modify catchment response to storms with a major effect on erosion and flood flows. The probability of occurrence of major floods in the post-fire season is shown to increase up to an order of magnitude under same precipitation conditions. Also, the expected anomaly of sediment yield can increase dramatically the desertification hazard in upland wildfire prone areas. One should further consider the role of firefloods produced by the combined occurrence of wildfires and storms as a fundamental source of non-stationarity in the assessment of hydrologic hazard. [Copyright &y& Elsevier]

Agriculture is one of the main causes of water consumption and degradation. Assessing its sustainability is important to determining how the current use of water resources can affect their availability in the future and to safeguard their quantity and quality. In this context, this research was designed to develop a simple approach for the evaluation of agricultural sustainability, based on coupling the assessment of the total water footprint (WF) of catchment-scale crops and in-stream monitoring activities. The study focussed on a Mediterranean agricultural watershed (Celone, southeast Italy). Results for the study period (July 2010–June 2011) show the total WF to be 79.9 Mm 3  y −1 , subdivided into 30.3% green water, 0.5% blue water and 69.2% grey water, thus highlighting the importance of grey water in agricultural water use. The grey WF estimates are highly sensitive both to leaching and runoff fractions and applied water standards, and they are affected by large uncertainty. Tomato is the crop having the highest total crop water use (CWU), which is equal to 2521 mm (286 mm green CWU, 412 mm blue CWU, 1823 mm grey CWU). Legumes relied only on green water (217 mm green CWU). The sustainability assessment of present water consumption, subdivided into the three WF components, indicates sustainable use of green water, fluctuating sustainability of blue water resources, depending on the season and the environmental flow requirement, and unsustainable grey water production and water pollution level for the Celone River. The methodology employed in this paper could be useful in watershed planning and management, helping farmers and decision-makers choose suitable crops for locally sustainable water use. [ABSTRACT FROM AUTHOR]

The increasing global demand for natural rubber (100% increase in the last 15 years) is for most part met by Malaysia and Indonesia, and – to a lesser extent – other countries in South-East Asia and Africa. The consequent expansion of rubber plantation has often occurred at the expenses of agricultural land for staple crops, particularly in South-East Asia, where 90% of the land suitable for agriculture is already under cultivation. Here we investigate the extent to which the ongoing increase in rubber production is competing with the food system and affecting the livelihoods of rural communities living in the production areas and their appropriation of natural resources, such as water. We also investigate to what extent the expansion of rubber plantations is taking place through large scale land acquisitions (LSLAs) and evaluate the impacts on rural communities. Our results show how rubber production needs more than 10 million ha of fertile land and up to 136–149 × 10 9 m 3 y −1 of freshwater (125 × 10 9 m 3 y −1 of green water and 11–24 × 10 9 m 3 y −1 of blue water). These resources would be sufficient to produce enough food to significantly reduce malnourishment in Indonesia, Thailand, and Vietnam if replaced by rice production. Overall, natural rubber production has important environmental, social, and economic impacts. Indeed, despite their ability to bring employment and increase the average income of economically disadvantaged areas, rubber plantations may threaten the local water and food security and induce a loss of rural livelihoods – particularly when the new plantations result from LSLAs that displace semi-subsistence forms of production – thereby forcing the local populations to depend on global food markets. [ABSTRACT FROM AUTHOR]

The inner connections between floods and food security are extremely relevant, especially in developing countries where food availability can be highly jeopardized by extreme events that damage the primary access to food, i.e. agriculture. A method for the evaluation of the effects of floods on food supply, consisting of the integration of remote sensing data, agricultural statistics and water footprint databases, is proposed and applied to two different case studies. Based on the existing literature related to extreme floods, the events in Bangladesh (2007) and in Pakistan (2010) have been selected as exemplary case studies. Results show that the use of remote sensing data combined with other sources of onsite information is particularly useful to assess the effects of flood events on food availability. The damages caused by floods on agricultural areas are estimated in terms of crop losses and then converted into lost calories and water footprint as complementary indicators. Method results are fully repeatable; whereas, for remote sensed data the sources of data are valid worldwide and the data regarding land use and crops characteristics are strongly site specific, which need to be carefully evaluated. A sensitivity analysis has been carried out for the water depth critical on the crops in Bangladesh, varying the assumed level by ±20%. The results show a difference in the energy content losses estimation of 12% underlying the importance of an accurate data choice. [ABSTRACT FROM AUTHOR]

Summary Rural populations around the world rely on small-scale farming and other uses of land and natural resources, which are often governed by customary, traditional, and indigenous systems of common property. In recent years, large-scale land acquisitions have drastically expanded; it is unclear whether the commons are a preferential target of these acquisitions. Here we argue that the contemporary global “land rush” could be happening at the expense of common-property systems around the world. While there is evidence that common-property systems have developed traditional institutions of resource governance that make them robust with respect to endogenous forces (e.g., uses by community members), it is less clear how vulnerable these arrangements are to exogenous drivers of globalization and expansion of transnational land investments. In common-property systems, farmers and local users may be unable to defend their customary rights and successfully compete with external actors. We define the notion of “commons grabbing” and report on an exploratory study that applied meta-analytical methods, drawing from the recent literature on large-scale land acquisitions and land grabbing. Informed by political economy and political ecology approaches, we coded selected cases on the basis of acquisition mechanisms, claims and property rights, changes in production system, and coercive dynamics, and explored the interactions between the different variables using association tests and qualitative comparative analysis. We found that the majority of the cases included in this analysis (44 of 56) could be examples of commons grabbing. [ABSTRACT FROM AUTHOR]

Pressure on agricultural land has markedly increased since the start of the century, driven by demographic growth, changes in diet, increasing biofuel demand, and globalization. To better ensure access to adequate land and water resources, many investors and countries began leasing large areas of agricultural land in the global South, a phenomenon often termed “large-scale land acquisition” (LSLA). To date, this global land rush has resulted in the appropriation of 41million hectares and about 490 km 3 of freshwater resources, affecting rural livelihoods and local environments. It remains unclear to what extent land and water acquisitions contribute to the emergence of water-stress conditions in acquired areas, and how these demands for water may be impacted by climate change. Here we analyze 18 African countries – 20 Mha (or 80%) of LSLA for the continent – and estimate that under present climate 210 km 3 year −1 of water would be appropriated if all acquired areas were actively under production. We also find that consumptive use of irrigation water is disproportionately contributed by water-intensive biofuel crops. Using the IPCCA1B scenario, we find only small changes in green (−1.6%) and blue (+2.0%) water demand in targeted areas. With a 3 °C temperature increase, crop yields are expected to decrease up to 20% with a consequent increase in the water footprint. When the effect of increasing atmospheric CO 2 concentrations is accounted for, crop yields increase by as much as 40% with a decrease in water footprint up to 29%. The relative importance of CO 2 fertilization and warming will therefore determine water appropriations and changes in water footprint under climate change scenarios. [ABSTRACT FROM AUTHOR]

Recent years have seen continued investments in new irrigation dams across Africa, which have led to the emergence of new irrigated areas in their vicinity (or 'command areas'). The ability to irrigate land that was previously only rainfed allows for an increase in crop production and is therefore associated with an increase in the value generated by agriculture. What is the value produced by irrigation in the command areas of new major African dams? Here we use crop water modeling under a variety of crop distribution scenarios to determine the increase in agricultural value induced by irrigation in the 'command' areas adjacent to the major irrigation dams. We use these estimates to determine the shadow price of irrigation water in these regions along with the increase in land value and land's economic productivity. We focus on dams built in Africa between 2000 and 2015, which are clustered in northern, east, and southern Africa. This study provides a framework to determine the economic benefits of irrigation dams and evaluate the increase in agricultural revenues resulting from access to water for irrigation. • We estimate the increase in crop production resulting from the irrigation of areas surrounding recent dams in Africa; • We calculate the shadow price of water through the value generated by irrigation in these areas; • We determine the increase in agricultural land value resulting from access to irrigation water under different crop scenarios. [ABSTRACT FROM AUTHOR]

• Water balance partitioning is used to assess water-related ecosystem services. • We propose a set of indicators including both demand- and supply-side perspectives. • Water balance in forest and pasture areas of the Amazon is assessed with 3 models. • Rainforests are important green water suppliers compared to deforested lands. • Forests greatly support provisioning, regulating and supporting ecosystem services. Rainforests ensure fundamental water-related ecosystem services that are currently threatened by land-use change, in particular deforestation. Quantitative assessments of water-related ecosystem services have traditionally focused on the benefits linked to direct water availability for humans. Under this perspective, forests have been considered as water consumers, due to high interception and transpiration rates that reduce water flows available to downstream human activities. In contrast, their role as water suppliers through transpiration from tree canopies has often been neglected. Integrating this second perspective into assessments of water-related ecosystem services from forests and other land covers is key to providing a comprehensive support to decision-making processes on land-use change. In addition, specific indicators are necessary to incorporate the contribution of the different water balance components into ecosystem service assessment. In this paper, we investigate the use of water balance partitioning for the assessment of water-related ecosystem services. We use three water balance models (two existing ones and one developed in this study) and compare, via model simulations, water balance partitioning and water-related ecosystem services of a forested and a deforested area of the Brazilian State of Rondônia. Then, we propose a set of indicators that, based on the outputs of the models, provide a multidimensional characterization of different land-use types. Regardless of the model used, the values of these indicators for the selected case study consistently point out the key role of vegetation in regulating the water cycle. Forests act as effective indirect water suppliers for human activities and are key players in moisture recycling, thanks to high evapotranspiration rates (about 68% of total precipitation). Deforested areas, instead, act as direct suppliers of water flows for human activities due to higher drainage rates (about 50% of total precipitation). The proposed methodology helps highlight the importance of comprehensive water-related ecosystem services assessments. Moreover, the indicators quantitatively support the impact assessment of land-use change on the different processes involved in the water cycle and on human activities relying, directly or indirectly, on these processes. [ABSTRACT FROM AUTHOR]

• Investigating root zone salinization and water conservation tradeoff. • Drip irrigation controls salt accumulation, minimizes water use, and prevents stress. • Furrow irrigation reduces soil salinity through enhanced drainage and salt leaching. • Sprinkler irrigation is associated with soil salinization. • Proper irrigation management is crucial for soil salinity prevention. Soil salinization is a global phenomenon that affects large tracts of arid farmland worldwide. It contributes to the loss of soil fertility, declining yields, and – in the most severe cases – land unsuitability for cultivation. Irrigation water applications are both the main cause of and the solution to, anthropogenic (or 'secondary') salinization because salt typically enters the soil column as dissolved in irrigation water and leaves it through excess water applications (e.g., leaching). Excess leaching, which places additional water costs in areas affected by water scarcity, can be achieved with different irrigation techniques and practices. Here, by complementing a process-based crop water model with a salt balance of the shallow soil, we investigate the tradeoff between root zone salinization and water conservation to limit withdrawals from the water source. We evaluate how such a tradeoff is achieved under different irrigation technology and excess leaching practices. Considering as a case study the cultivation of tomatoes in Egypt, we find that drip and furrow irrigation allows for better control of salt accumulation, thus preventing crop exposure to salt stress. Drip irrigation achieves this goal with minimal water applications because it maintains the soil wetter. Thus, the (rare) rainfall events find more suitable conditions to drain the excess moisture. Conversely, by using more irrigation water (and 'less efficiently'), furrow irrigation allows for higher rates of soil drainage and salt leaching. The irrigation schedule typically adopted with sprinkler irrigation allows for soil drying, thus limiting the ability of rainfall events to drain the soil and leach its salts. Collectively, these results highlight the key role of irrigation technology and practices in the management of secondary salinity in dryland agriculture. Specifically, there is a tradeoff between minimizing water use and preventing salt accumulation in the root zone. Drip irrigation exhibits the co-benefit of achieving both goals, while furrow irrigation limits soil salinity at the cost of requiring greater volumes of applied irrigation water. [ABSTRACT FROM AUTHOR]

Highlights • A new method for the assessment of the water–food–energy nexus is developed. • The quantification of the WFE nexus is operated through an efficiency-type index. • The new index assesses the interrelationship among water and land use and the food production in bioenergy production. • The method is applied to assess the efficiency of biofuel production on the global scale and from the main crops used. Abstract This paper assesses the sustainability of bioenergy production under a nexus perspective through a new efficiency type index. The index describes 1st generation biofuel production under the perspective of the implied consumption of natural resources. We consider the sustainability of energy production as a sequence of steps, each characterised by its efficiency, and propose an index which returns an overall efficiency value describing the adequacy or inadequacy of the considered processes under a nexus perspective. The direct application of the nexus index entails an indication of the possible improvements needed to move production towards most sustainable processes or places. Moreover, it allows evaluating the efficiency of the main crops currently used in biofuel production with respect to the water–food–energy nexus. The results depict countries presently capable of performing sustainable production of 1st generation biofuel from particular crops. Furthermore, the analysis of the single components of the nexus index allows understanding the effects of possible improvements (e.g. soil and water management, new generation biofuels) on the overall production efficiency under a nexus perspective. [ABSTRACT FROM AUTHOR]

Abstract: Terrain analysis applications using remotely sensed Digital Elevation Models (DEMs), nowadays easily available, permit to quantify several river basin morphologic and hydrologic properties (e.g. slope, aspect, curvature, flow path lengths) and indirect hydrogeomorphic indices (e.g. specific upslope area, topographic wetness index) able to characterize the physical processes governing the landscape evolution (e.g. surface saturation, runoff, erosion, deposition). Such DEMs often contain artifacts and the automated hydrogeomorphic characterization of the watershed is influenced by terrain analysis procedures consisting in artificial depression (pit) and flat area treatment approaches combined with flow direction methods. In shallow landslide deterministic models, when applied using topographic dataset at medium scale (e.g. 30 m of resolution), the choice of the most suitable DEM-processing procedure is not trivial and can influence model results. This also affects the selection of most critical areas for further finer resolution studies or for the implementation of countermeasures aiming to landslide risk mitigation. In this paper such issue is investigated using as topographic input the ASTER DEMs and comparing two different combinations of DEM correction and flow routing schemes. The study areas comprise ten catchments in Italy for which hydrogeomorphic processes are significant. Aims of this paper are: 1) to introduce a parameter estimation procedure for the physically-based DEM correction method PEM4PIT (Physical Erosion Model for PIT removal); 2) to investigate the influence of different terrain analysis procedures on results of the slope stability model SHALSTAB (SHAllow Landsliding STABility) using remotely-sensed ASTER DEMs; 3) trying to assess which of terrain analysis methods is more appropriate for describing terrain instability. [Copyright &y& Elsevier]

• Meat consumption is expected to grow in the next future and poultry segment will have the highest increase. • We evaluate global country based poultry feed demand and domestic availability thus assessing the natural resources needed for its production. • In 2016, to support the poultry feed production 49 Mha of cereals and 64 Mha of oilseed were required and at least 52 km3 of blue water. The poultry industry plays an important role in meat production/supply, with a growth rate of more than 4% p.a. in the last few years. This white meat production requires a large amount of feed that increases competition in the use of natural resources for primary food and other uses. Grains are the primary source of poultry nutrition and oilseeds are the most common protein source, with maize, wheat, and soybean being the most common ingredients in poultry diets. It is not clear to what extent natural resources are used to produce these feed crops and what the impact is of the resulting pressure on the availability of natural resources for other uses. The study evaluates and quantifies the local feed availability and the associated amount of local and non-local land and water resources required for the poultry production worldwide at a country and region scale as of 2016, including a detailed global feed trade analysis for the top poultry producer countries. Country-specific diets were used for the ten largest producer countries and two simplified diets for the global scale. The feed amounts were converted in land and water demand using crop-specific yields and a phisically based and spatially distributed hydrological model. The findings showed that 49 Mha of cereals (37 Mha local) and 64 Mha of soybean (25 Mha local) are needed to feed chickens globally, together with approximately 441 km3 of green water (197 km3 and 244 km3 for cereals and soybean, respectively) and 52 km3 of blue water (27 km3 and 25 km3, respectively) required by these feed crops in 2016. However, significant amounts of natural resources are saved through the international feed trade. The results obtained suggest the need for more sustainable approaches to address future projections in the sector. [ABSTRACT FROM AUTHOR]

• Mulberry silk production has been booming in India in the last decades. • We assess the potential competition between food and cash crops production in wastelands. • Mulberry expansion areas are going to experience exacerbation of water scarcity. One of the main challenges for India is increasing food security and promoting economic development using the domestic finite and already stressed natural resources. In the last decades silk production has been booming in India in response to the 2025 silk self-sufficiency goal set by the Indian Ministry of Textile. It is not clear to which extent mulberry (Morus alba), used to feed silkworm in 70% of the total domestic silk production, can be expanded in the wastelands identified by the Indian Government as suitable for moriculture without both endangering natural resources and causing competition for natural resources with the food sector. This issue is here investigated by a) assessing mulberry water consumption (rain and irrigation) in the plantations presently cultivated and in all the wastelands selected by the government for the expansion of moriculture as well; b) analyzing annual and sub-annual water scarcity induced by mulberry plantations within the plantations; c) studying the potential competition for natural resources between food crops and mulberry. To this end the dynamic spatially distributed crop water balance WATNEEDS model has been used to analyze two different scenarios being the reference scenario considering the present climate and land cover, and the "silk expansion scenario" combining present climate and the new mulberry plantations. Results for the reference scenario show mulberry expansion areas already suffering food insecurity and water scarcity in the dry period. Here, the expansion of mulberry cultivation is shown to exacerbate water scarcity in pre-monsoon months especially in the North-Eastern Region affecting on a yearly scale eleven million people. Results also show expanding food production on wastelands rather than mulberry could be a viable solution for alleviating the burden of malnutrition. [ABSTRACT FROM AUTHOR]

• We use machine learning methods to develop global maps of irrigated areas. • We provide annual global maps of irrigated areas between 2001-2015. • We document recent trends of expansion or contraction around the world. About 40% of global crop production takes place on irrigated land, which accounts for approximately 20% of the global farmland. The great majority of freshwater consumption by human societies is associated with irrigation, which contributes to a major modification of the global water cycle by enhancing evapotranspiration and reducing surface and groundwater runoff. In many regions of the world irrigation contributes to streamflow and groundwater depletion, soil salinization, cooler microclimate conditions, and altered land-atmosphere interactions. Despite the important role played by irrigation in food security, water cycle, soil productivity, and near-surface atmospheric conditions, its global extent remains poorly quantified. To date global maps of irrigated land are often based on estimates from circa year 2000. Here we apply artificial intelligence methods based on machine learning algorithms to satellite remote sensing and monthly climate data to map the spatial extent of irrigated areas between 2001 and 2015. We provide global annual maps of irrigated land at ≈9km resolution for the 2001-2015 and we make this dataset available online. [ABSTRACT FROM AUTHOR]