A5069855874- Geophysics and Gravity Measurements
- Hydrology and Watershed Management Studies
- GNSS positioning and interference
- Soil Moisture and Remote Sensing
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Flood Risk Assessment and Management
- Geophysical and Geoelectrical Methods
- Soil erosion and sediment transport
- Soil and Unsaturated Flow
- Hydrology and Sediment Transport Processes
- Climate variability and models
- Reservoir Engineering and Simulation Methods
- Cryospheric studies and observations
- Climate change and permafrost
- Plant Water Relations and Carbon Dynamics
- Water resources management and optimization
- Methane Hydrates and Related Phenomena
- Water-Energy-Food Nexus Studies
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Hydrology and Drought Analysis
- Spacecraft and Cryogenic Technologies
- Radio Astronomy Observations and Technology
GFZ Helmholtz Centre for Geosciences
2015-2024
University of Potsdam
2015-2024
Centre de Géosciences
2015
Universidade Federal do Ceará
2004-2011
Federal Agency for Cartography and Geodesy
2008
Potsdam Institute for Climate Impact Research
1999-2004
University of Twente
2004
Abstract Observed streamflow of headwater catchments the Tarim River (Central Asia) increased by about 30% over period 1957–2004. This study aims at assessing to which extent these trends can be attributed changes in air temperature or precipitation. The analysis includes a data‐based approach using multiple linear regression and simulation‐based hydrological model. model considers both glacier area surface elevation. It was calibrated multiobjective optimization algorithm with calibration...
Abstract The GRACE‐FO satellites launched in May 2018 are able to quantify the water mass deficit Central Europe during two consecutive summer droughts of and 2019. Relative long‐term climatology, deficits were − 112 ± 10.5 Gt 145 12 These 73% 94% mean amplitude seasonal storage variations, which is so severe that a recovery cannot be expected within 1 year. 2019 largest whole GRACE time span. Globally, data do not show an offset between missions, proves successful continuation by thus...
Abstract. Climate change increases the occurrence and severity of droughts due to increasing temperatures, altered circulation patterns, reduced snow occurrence. While Europe has suffered from drought events in last decade unlike ever seen since beginning weather recordings, harmonized long-term datasets across continent are needed monitor support predictions. Here we present soil moisture data 66 cosmic-ray neutron sensors (CRNSs) (COSMOS-Europe for short) covering recent events. The CRNS...
While continental water storage plays a key role in the Earth's water, energy, and biogeochemical cycles, its temporal spatial variations are poorly known, particular, for large areas. This study analyzes simulated with Watergap Global Hydrology Model. The model represents four major compartments: surface snow, soil, groundwater. Water analyzed period 1961–1995 0.5° resolution, global climate zones, 30 largest river basins worldwide. Seasonal dominant change signal maximum values marginal...
Since its launch in March 2002, the Gravity Recovery and Climate Experiment (GRACE) mission has been measuring global time variations of Earth's gravity field with a current resolution ∼500 km. Especially over continents, these measurements represent integrated land water mass, including surface waters (lakes, wetlands rivers), soil moisture, groundwater, snow cover. In this study, we use GRACE solutions computed by Ramillien et al. (2005a) through an iterative inversion monthly geoids from...
Quantification of spatially and temporally resolved water flows storage variations for all land areas the globe is required to assess resources, scarcity flood hazards, understand Earth system. This quantification done with help global hydrological models (GHMs). What are challenges prospects in development application GHMs? Seven important presented. (1) Data makes human use difficult even though significant progress has been achieved last decade. (2) Uncertainty meteorological input data...
Abstract Including satellite‐derived snow cover data for hydrologic model calibration can be a good way to improve internal consistency. This study applied multiobjective genetic algorithm characterize the trade‐off curve between performance in terms of discharge and area (SCA). Using Monte Carlo‐based approach, we further investigated additional information content an increasing number SCA scenes used period. The was performed six snowmelt‐dominated headwater catchments Karadarya Basin...
Dense reservoir networks, with thousand of small dams, can be increasingly found throughout the world, especially in water-scarce environments, such as Brazilian northeastern region. Although effect individual dams might negligible, their joint has proved to relevant on water and sediment connectivity. Literature, however, is scarce concerning networks availability and/or sustainability mesoscale or large-scale basins. This research intended both assess dense network semiarid Upper Jaguaribe...
Abstract. Measuring soil moisture with cosmic-ray neutrons is a promising technique for intermediate spatial scales. To convert neutron counts to average volumetric water content simple calibration function can be used (the N0-calibration of Desilets et al., 2010). The based on derived directly from samples taken within the footprint sensor. We installed sensor (CRS) in mixed forest lowlands north-eastern Germany and calibrated it 10 times throughout one calendar year. Each resulted...
Abstract. Monitoring soil moisture is still a challenge: it varies strongly in space and time at various scales while conventional sensors typically suffer from small spatial support. With sensor footprint up to several hectares, cosmic-ray neutron sensing (CRNS) modern technology address that challenge. So far, the CRNS method has been applied with single or sparse national-scale networks. This study presents, for first time, dense network of 24 stations covered, May July 2019, an area just...
Abstract Compound flooding in coastal regions, that is, the simultaneous or successive occurrence of high sea levels and river flows, is expected to increase a warmer world. To date, however, there no robust evidence on projected changes compound for northwestern Europe. We combine storm surges floods with probabilistic, localized relative sea‐level rise (SLR) scenarios assess future flood hazard over Europe (RCP8.5) emission scenario. use high‐resolution, dynamically downscaled regional...
ABSTRACT Life on Earth vitally depends the availability of water. Human pressure freshwater resources is increasing, as human exposure to weather-related extremes (droughts, storms, floods) caused by climate change. Understanding these changes pivotal for developing mitigation and adaptation strategies. The Global Climate Observing System (GCOS) defines a suite essential variables (ECVs), many related water cycle, required systematically monitor Earth’s system. Since long-term observations...
A key component to understanding and predicting water fluxes quality in river basins is the spatial distribution of water‐saturated areas. There limited knowledge on patterns saturated areas, their relation landscape characteristics processes, ability hydrological models represent observed patterns, particularly at large scales most relevant for resources management. In this study, areas were mapped two mesoscale (18 40 km 2 ), humid temperate basins. Geobotanical pedological criteria used...
Abstract A methodology is presented to assess the impact of reservoir silting on water availability for semiarid environments, applied seven representative watersheds in state Ceará, Brazil. Water yield computed using stochastic modelling several reliability levels and reduction quantified focus areas. The yield—volume elasticity concept, which indicates relative terms storage capacity reservoirs, applied. Results show that was reduced by 0.2% year−1 due silting, risk shortage almost doubled...
We assess the controls of terrestrial water budget over Eurasian pan‐Arctic drainage region from 2003 to 2009 by combining observations Gravity Recovery and Climate Experiment (GRACE) with reanalysis estimates net precipitation river discharge gauges. Of particular interest are expansive permafrost regions. Thawing has been implicated contribute observed increases through melting excess ground ice. show that storage (TWS) large areas increased during 2003–2009. However, significant...