A5029058809- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Climate variability and models
- Plant Water Relations and Carbon Dynamics
- Remote Sensing in Agriculture
- Hydrology and Drought Analysis
- Atmospheric chemistry and aerosols
- Meteorological Phenomena and Simulations
- Precipitation Measurement and Analysis
- Geography and Environmental Studies
- Environmental and biological studies
- Air Quality Monitoring and Forecasting
- Greenhouse Technology and Climate Control
- Science and Climate Studies
Wageningen University & Research
2018-2021
The tropical carbon balance dominates year-to-year variations in the CO 2 exchange with atmosphere through photosynthesis, respiration and fires. Because of its high correlation gross primary productivity (GPP), observations sun-induced fluorescence (SIF) are great interest. We developed a new remotely sensed SIF product improved signal-to-noise tropics, use it here to quantify impact 2015/2016 El Niño Amazon drought. find that was strongly suppressed over areas anomalously temperatures...
The 2018 drought was one of the worst European droughts twenty-first century in terms its severity, extent and duration. effects could be seen a reduction harvest yields parts Europe, as well an unprecedented browning vegetation summer. Here, we quantify effect on net ecosystem exchange (NEE) using five independent regional atmospheric inversion frameworks. Using network CO 2 mole fraction observations, estimate NEE with at least monthly 0.5° × resolution for 2009–2018. We find that annual...
We analysed gross primary productivity (GPP), total ecosystem respiration (TER) and the resulting net exchange (NEE) of carbon dioxide (CO 2 ) by terrestrial biosphere during summer 2018 through observed changes across Integrated Carbon Observation System (ICOS) network, inverse modelling, remote sensing. Highly correlated yet independently-derived reductions in from sun-induced fluorescence, vegetative near-infrared reflectance, GPP simulated Simple Biosphere model version 4 (SiB4) suggest...
The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its "17O excess," has been proposed a tracer for gross primary production (the uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations together with detailed description and sensitivity analyses. In our framework we include stratospheric source surface sinks from vegetation, soils, ocean, biomass burning, fossil fuel combustion. effect oxidation CO on is included model....
The 2015/2016 El Niño event caused severe changes in precipitation across the tropics. This impacted surface hydrology, such as river run-off and soil moisture availability, thereby triggering reductions gross primary production (GPP). Many biosphere models lack detailed hydrological component required to accurately quantify anomalies hydrology GPP during droughts tropical regions. Here, we take novel approach of coupling model SiBCASA with advanced PCR-GLOBWB attempt a quantification Amazon...
Abstract. Solar-induced fluorescence (SIF) data from satellites are increasingly used as a proxy for photosynthetic activity by vegetation and constraint on gross primary production. Here we report improvements in the algorithm to retrieve mid-morning (09:30 LT) SIF estimates global scale GOME-2 sensor MetOp-A satellite (GOME-2A) period 2007–2019. Our new SIFTER (Sun-Induced Fluorescence of Terrestrial Ecosystems Retrieval) v2 improves over previous version using narrower spectral window...
Abstract. Solar-induced fluorescence (SIF) data from satellites are increasingly used as a proxy for photosynthetic activity by vegetation, and constraint on gross primary production. Here we develop an improved retrieval algorithm to retrieve mid-morning (09:30 hrs local time) SIF estimates the global scale GOME-2 sensor Metop-A satellite (GOME-2A) period 2007–2019. Our new SIFTER v2 improves over previous version using narrower spectral window that avoids strong oxygen absorption is less...
<p>Solar-Induced Fluorescence (SIF) data from satellites are increasingly used as a proxy for photosynthetic activity by vegetation, and constraint on gross primary production. The Royal Netherlands Meteorological Institute has developed an improved retrieval algorithm called SIFTER, to retrieve mid-morning (09:30 hrs local time) SIF estimates the global scale GOME-2 sensors Metop satellite series. product is within ACSAF network of EUMETSAT beta version publicly available...
<p>The boreal biome is an important component of the global carbon (C) cycle. However, current estimates its sink-source strength at regional scales and responses to climate change rely primarily on models thus remain uncertain. We investigated C balance over a north Scandinavian region by integrating observations land-atmosphere fluxes atmospheric CO<sub>2</sub> concentrations landscape scales. also placed special focus understand impact 2018...