A5025983426- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Climate change and permafrost
- Meteorological Phenomena and Simulations
- Peatlands and Wetlands Ecology
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Hydrology and Watershed Management Studies
- Methane Hydrates and Related Phenomena
- Soil Moisture and Remote Sensing
- Forest ecology and management
- Fire effects on ecosystems
- Tree-ring climate responses
- Geology and Paleoclimatology Research
- Climate Change Policy and Economics
- Atmospheric Ozone and Climate
- Soil Carbon and Nitrogen Dynamics
- Plant responses to elevated CO2
- Precipitation Measurement and Analysis
- Remote Sensing in Agriculture
- Plant Ecology and Soil Science
- Environmental Impact and Sustainability
- Soil and Unsaturated Flow
- Hydrocarbon exploration and reservoir analysis
Vrije Universiteit Amsterdam
2015-2025
Royal Netherlands Institute for Sea Research
2020-2025
Netherlands Earth System Science Centre
2022-2023
Utrecht University
1955-2023
Nederlands Instituut Voor Zuivel Oonderzoek
2022
Finnish Meteorological Institute
2021
Chinese University of Hong Kong
2021
Northern Arizona University
2021
University of Helsinki
2021
University of Alaska Fairbanks
2021
Abstract. This paper outlines a new strategy to derive evaporation from satellite observations. The approach uses variety of satellite-sensor products estimate daily at global scale and 0.25 degree spatial resolution. Central this methodology is the use Priestley Taylor (PT) model. minimalistic PT equation combines small number inputs, majority which can be detected space. reduces variables that need modelled. Key distinguishing features are microwave-derived soil moisture, land surface...
Abstract The FLUXNET2015 dataset provides ecosystem-scale data on CO 2 , water, and energy exchange between the biosphere atmosphere, other meteorological biological measurements, from 212 sites around globe (over 1500 site-years, up to including year 2014). These sites, independently managed operated, voluntarily contributed their create global datasets. Data were quality controlled processed using uniform methods, improve consistency intercomparability across sites. is already being used...
Summary This paper presents CO 2 flux data from 18 forest ecosystems, studied in the European Union funded EUROFLUX project. Overall, mean annual gross primary productivity (GPP, total amount of carbon (C) fixed during photosynthesis) these forests was 1380 ± 330 gC m −2 y −1 (mean ±SD). On average, 80% GPP respired by autotrophs and heterotrophs released back into atmosphere (total ecosystem respiration, TER = 1100 260 ). Mean soil respiration (SR) 760 340 (55% 69% TER). Among investigated...
Abstract Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount the terrestrial sink is realized by forests. However, considerable uncertainties remain regarding fate this over both short and long timescales. Relevant data to address these are being collected at many sites around world, but syntheses still sparse. To facilitate future synthesis activities, we have assembled a comprehensive global database for forest ecosystems, which includes budget variables...
Most inverse atmospheric models report considerable uptake of carbon dioxide in Europe's terrestrial biosphere. In contrast, stocks ecosystems increase at a much smaller rate, with gains forests and grassland soils almost being offset by losses from cropland peat soils. Accounting for non-carbon transfers that are not detected the fluxes bypassing ecosystem considerably reduces gap between small carbon-stock changes larger estimated models. The remaining difference could be because missing...
Abstract Methane (CH 4 ) is produced in many natural systems that are vulnerable to change under a warming climate, yet current CH budgets, as well future shifts emissions, have high uncertainties. Climate has the potential increase emissions from critical such wetlands, marine and freshwater systems, permafrost, methane hydrates, through temperature, hydrology, vegetation, landscape disturbance, sea level rise. Increased these would turn induce further climate change, resulting positive...
Abstract This paper overviews the short‐term (biophysical) and long‐term (out to around 100 year timescales; biogeochemical biogeographical) influences of land surface on weather climate. From our review literature, evidence is convincing that terrestrial ecosystem dynamics these timescales significantly influence atmospheric processes. In studies past possible future climate change, are as important changes in composition, ocean circulation, ice sheet extent, orbit perturbations.
This paper overviews the short-term (biophysical) and long-term (out to around 100 year timescales; biogeochemical biogeographical) influences of land surface on weather climate. From our review literature, evidence is convincing that terrestrial ecosystem dynamics these timescales significantly influence atmospheric processes. In studies past possible future climate change, are as important changes in composition, ocean circulation, ice sheet extent, orbit perturbations.
Abstract. A process-based methodology is applied to estimate land-surface evaporation from multi-satellite information. GLEAM (Global Land-surface Evaporation: the Amsterdam Methodology) combines a wide range of remotely-sensed observations derive daily actual and its different components. Soil water stress conditions are defined root-zone profile soil moisture used transpiration based on Priestley Taylor equation. The also derives evaporationfrom bare snow sublimation. Tall vegetation...
Drainage of peatlands and deforestation have led to large-scale fires in equatorial Asia, affecting regional air quality global concentrations greenhouse gases. Here we used several sources satellite data with biogeochemical atmospheric modeling better understand constrain fire emissions from Indonesia, Malaysia, Papua New Guinea during 2000-2006. We found that average this region [128 +/- 51 (1sigma) Tg carbon (C) year(-1), T = 10(12)] were comparable fossil fuel emissions. In Borneo,...
Abstract. Land evapotranspiration (ET) estimates are available from several global data sets. Here, monthly land ET synthesis products, merged these individual sets over the time periods 1989–1995 (7 yr) and 1989–2005 (17 yr), presented. The products shorter period based on a total of 40 distinct while those longer 14 In sets, is derived satellite and/or in situ observations (diagnostic sets) or calculated via land-surface models (LSMs) driven with observations-based forcing output...
Within the scope of upcoming launch a new water related satellite mission (SMOS) global evaluation study was performed on two available soil moisture products. ERS scatterometer surface wetness data compared to AMSR-E data. This pointed out strong similarity between both products in sparse moderate vegetated regions with an average correlation coefficient 0.83. Low correlations were found densely areas and deserts. The low values can be explained by limited retrieval capabilities over dense...
Abstract. The WAter Cycle Multi-mission Observation Strategy – EvapoTranspiration (WACMOS-ET) project aims to advance the development of land evaporation estimates on global and regional scales. Its main objective is derivation, validation, intercomparison a group existing retrieval algorithms driven by common forcing data set. Three commonly used process-based methodologies are evaluated: Penman–Monteith algorithm behind official Moderate Resolution Imaging Spectroradiometer (MODIS) product...
An alternative to thermal infrared satellite sensors for measuring land surface temperature ( T s ) is presented. The 37 GHz vertical polarized brightness used derive because it considered the most appropriate microwave frequency retrieval. This channel balances a reduced sensitivity soil characteristics with relatively high atmospheric transmissivity. It shown that simple linear relationship, accurate values can be obtained from this frequency, theoretical bias of within 1 K 70% vegetated...