A5015768048- Oil Palm Production and Sustainability
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Remote Sensing and LiDAR Applications
- Remote Sensing in Agriculture
- Climate variability and models
- Water-Energy-Food Nexus Studies
- Conservation, Biodiversity, and Resource Management
- Meteorological Phenomena and Simulations
- Climate change impacts on agriculture
- Crop Yield and Soil Fertility
- Hydrology and Drought Analysis
- Solar Radiation and Photovoltaics
- Fire effects on ecosystems
- Coconut Research and Applications
- Forest Ecology and Conservation
- Smart Agriculture and AI
- Chemical Safety and Risk Management
- Wheat and Barley Genetics and Pathology
- Date Palm Research Studies
- African Botany and Ecology Studies
- Climate Change and Health Impacts
- Leaf Properties and Growth Measurement
- Plant biochemistry and biosynthesis
University of Twente
2023-2025
Justus-Liebig-Universität Gießen
2022-2025
University of Göttingen
2019-2023
Abstract In the United Nations Decade on Ecosystem Restoration 1 , large knowledge gaps persist how to increase biodiversity and ecosystem functioning in cash crop-dominated tropical landscapes 2 . Here, we present findings from a large-scale, 5-year restoration experiment an oil palm landscape enriched with 52 tree islands, encompassing assessments of ten indicators 19 functioning. Overall, functioning, as well multidiversity multifunctionality, were higher islands compared conventionally...
Abstract. The summer of 2018 was an extraordinary season in climatological terms for northern and central Europe, bringing simultaneous, widespread, concurrent heat drought extremes large parts the continent with extensive impacts on agriculture, forests, water supply, socio-economic sector. Here, we present a comprehensive, multi-faceted analysis extreme particular focus Germany. heatwave first affected Scandinavia mid-July shifted towards Europe late July, while Iberia primarily early...
Abstract. Europe frequently experiences a wide range of extreme events and natural hazards, including heatwaves, precipitation, droughts, cold spells, windstorms, storm surges. Many these do not occur as single but rather show multivariate character, known compound events. We investigate the interactions between weather events, their characteristics, changes in intensity frequency, well uncertainties past, present, future. also explore impacts on various socio-economic sectors Germany...
Evapotranspiration (ET) is a central flux in the hydrological cycle. Various approaches to compute ET via energy balance models exist, but their handling often complex and challenging. We developed QWaterModel as an easy-to-use tool make predictions available broader audiences. based on DATTUTDUT model uses land surface temperature maps input. Such can e.g. be obtained from satellite, drone or handheld camera imagery. In present study, we successfully tested for predicting tropical oil palm...
Evapotranspiration (ET) from tropical forests plays a significant role in regulating the climate system. Forests are diverse ecosystems, encompass heterogeneous site conditions and experience seasonal fluctuations of rainfall. Our objectives were to quantify ET rainforest using high-resolution thermal images simple modeling framework. In lowland Sumatra, infrared (TIR) taken an uncrewed aerial vehicle (UAV) upland riparian sites during both dry wet seasons. We predicted land surface...
Plant transpiration is a key element in the hydrological cycle. Widely used methods for its assessment comprise sap flux techniques whole-plant and porometry leaf stomatal conductance. Recently emerging approaches based on surface temperatures wide range of machine learning offer new possibilities to quantify transpiration. The focus this study was predict conductance drone-recorded meteorological data compare these predictions with in-situ measured To build prediction models, we applied...
Abstract. The summer of 2018 was an extraordinary season in climatological terms for northern and central Europe, bringing simultaneous, widespread, concurrent heat drought extremes large parts the continent with extensive impacts on agriculture, forests, water supply, socio-economic sector. We present a comprehensive, multi-faceted analysis extreme Europe particular focus Germany. heatwave first affected Scandinavia by mid-July, shifted towards late July, while Iberia primarily early...
Tropical rainforests comprise complex 3D structures and encompass heterogeneous site conditions; their transpiration contributes to climate regulation. The objectives of our study were test the relationship between tree water use crown metrics predict spatial variability canopy across sites. In a lowland rainforest Sumatra, we measured with sap flux techniques simultaneously assessed drone-based photogrammetry. We observed close linear individual surface area (R2 = 0.76, n 42 trees)....
Abstract Transpiration at the stand level is often estimated from water use measurements on a limited number of plants and then scaled up by predicting remaining plant size‐related variables. Today, drone‐based methods offer new opportunities for size assessments. We tested crown variables derived photogrammetry scaling use. In an oil palm agroforest monoculture plantation in lowland Sumatra, Indonesia, tree rates were measured sap flux techniques. Simultaneously, aerial images taken...
Abstract. For the assessment of evapotranspiration, near-surface airborne thermography offers new opportunities for studies with high numbers spatial replicates and in a fine resolution. We tested drone-based subsequent application DATTUTDUT energy balance model using widely accepted eddy covariance technique as reference method. The study site was mature oil palm plantation lowland Sumatra, Indonesia. 61 flight missions, latent heat flux estimates (Deriving Atmosphere Turbulent Transport...
Supplementary Figure (SOM) S1: (a) Surface weather analysis produced by The Deutscher Wetterdienst (DWD) at 1200 UTC on 18 January 2018, when windstorm Friederike passed through Germany.(b) As but 3 2018 for Burglind.Charts were downloaded from Wetter3.de (n.d).(c) Mean sea level pressure (thick contours; increasing 960 hPa with 5 intervals) (location of Burglind shown the star) and maximum precipitation intensity (shaded) during 6 hours before after (black circles) based ERA5 reanalysis.The...
Abstract Microclimate and vegetation structure control evapotranspiration (ET) from land surfaces at stand landscape scales. Tropical rainforests are among the most diverse complex terrestrial ecosystems, harbouring vast plant animal species throughout their dense multistory canopy. They contribute substantially to global precipitation through high ET. However, there is little information about ET influences very small spatial scales under given climatic conditions. In a tropical rainforest...
Abstract. For the assessment of evapotranspiration, near-surface airborne thermography offers new opportunities for studies with high numbers spatial replicates and in a fine resolution. We tested drone-based subsequent application three energy balance models (DATTUTDUT, TSEB-PT, DTD) using widely accepted eddy covariance technique as reference method. The study site was mature oil palm plantation lowland Sumatra, Indonesia. 61 flight missions, latent heat flux estimates DATTUTDUT model...
Abstract The water–energy–food (WEF) nexus is an integrated conceptual tool for achieving sustainable development especially countries facing limitations in one or more of its three pillars. approach relies on bringing different stakeholders from the water, agriculture and energy sectors together to collaboratively plan adopt a holistic resources management. This enables them address sector-specific issues develop comprehensive understanding connected leading better outcomes. However, WEF...
Abstract Tropical rainforests are rich in tree species and comprise complex canopy structures. Transpiration by forest trees is a major hydrological flux which contributes to climate regulation. We explored the role of structure on transpiration tropical rainforest Sumatra, Indonesia. Drone‐based photogrammetry from motion technique were used compute high‐resolution 3D point clouds derive structural variables. differently sized vertically positioned was assessed with sap measurements....
Microclimate and Land Surface Temperature (LST) are important analytical variables used to understand complex oil palm agroforestry systems their effects on biodiversity ecosystem functions. In order examine experimental of tree species richness (0, 1, 2, 3 or 6), plot size (25 m2, 100 400 1600 m2) stand structural complexity microclimate Temperature, related data were collected following a strict design. The experiment was carried out in the Jambi province, Sumatra (Indonesia), as part...
Abstract. The European continent is regularly affected by a wide range of extreme events and natural hazards including heatwaves, precipitation, droughts, cold spells, windstorms, storm surges. Many these do not occur as single events, but rather show multivariate character, the so-called compound events. Within scope interdisciplinary project climXtreme (https://climxtreme.net/), we investigate interplay weather their characteristics changes, intensity, frequency uncertainties in past,...
<p>Evapotranspiration (ET) is a key flux in hydrological cycles; it affected by both climate and land-use change. A recent study across 42 sites four types lowland Sumatra (Indonesia) reported that local regional transpiration are on the rebound due to high water use continuing expansion of oil palm plantations. Conventional ET assessment methods such as satellite-based thermography or eddy covariance (EC) technique lack spatial resolution replicability, respectively, required...