Steven Dewitte
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View article: The Earth Climate Observatory space mission concept for innovative continuity in the monitoring of the Earth Outgoing Longwave Radiation.
The Earth Climate Observatory space mission concept for innovative continuity in the monitoring of the Earth Outgoing Longwave Radiation. Open
The Earth Energy Imbalance (EEI) is defined as the small difference between the incoming energy the Earth receives from the Sun and the outgoing energy lost by Earth to space. The EEI is accumulated in the Earth climate system and results …
View article: The Earth Climate Observatory space mission concept for the monitoring of the Earth Energy Imbalance.
The Earth Climate Observatory space mission concept for the monitoring of the Earth Energy Imbalance. Open
Monitoring the Earth Energy Imbalance (EEI) is of prime importance for a predictive understanding of climate change. Furthermore, monitoring of the EEI gives an early indication on how well mankind is doing in implementing the Paris Climat…
View article: The Earth Climate Observatory space mission concept for innovative continuity in the monitoring of the Earth Reflected Solar Radiation
The Earth Climate Observatory space mission concept for innovative continuity in the monitoring of the Earth Reflected Solar Radiation Open
Monitoring the Earth Energy Imbalance (EEI) is crucial for predicting climate change and assessing global progress under the Paris Climate Agreement. Currently, the most accurate EEI estimates are derived from in situ observations, with a …
View article: Centennial Total Solar Irradiance variation : a paradigm shift for Sun-Climate research.
Centennial Total Solar Irradiance variation : a paradigm shift for Sun-Climate research. Open
A variation of the solar energy received by the earth – quantified by the Total Solar Irradiance (TSI) – is a radiative forcing for climate changes on earth. Since the 1976 Science paper by J. Eddy, solar-climate research has b…
View article: The Earth Climate Observatory (ECO) space mission concept for the monitoring of the Earth Energy Imbalance (EEI)
The Earth Climate Observatory (ECO) space mission concept for the monitoring of the Earth Energy Imbalance (EEI) Open
The Earth Energy Imbalance (EEI) is defined as the small difference between the incoming energy received by the Earth from the Sun and the outgoing energy lost by the Earth to space. Both the incoming solar and the terrestrial outgoing ene…
View article: A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy
A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy Open
As part of the Earth Climate Observatory space mission concept for the direct observation from space of the Earth Energy Imbalance, we propose an advanced camera suite for the high-resolution observation of the Total Outgoing Radiation of …
View article: A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy
A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy Open
As part of the Earth Climate Observatory space mission concept for the direct observation from space of the Earth Energy Imbalance, we propose an advanced camera suite for the high resolution observation of the Total Outgoing Radiation of …
View article: The Uncertainty Analysis of the Entrance Pupil Irradiance for a Moon-Based Earth Radiation Observation Instrument
The Uncertainty Analysis of the Entrance Pupil Irradiance for a Moon-Based Earth Radiation Observation Instrument Open
Moon-Based Earth Radiation Observation (MERO) is expected to improve and enrich the current Earth radiation budget (ERB). For the design of MERO’s instrument and the interpretation of Moon-based data, evaluating the uncertainty of the inst…
View article: A Model for Estimating the Earth’s Outgoing Radiative Flux from A Moon-Based Radiometer
A Model for Estimating the Earth’s Outgoing Radiative Flux from A Moon-Based Radiometer Open
A Moon-based radiometer can provide continuous measurements for the Earth’s full-disk broadband irradiance, which is useful for studying the Earth’s Radiation Budget (ERB) at the height of the Top of the Atmosphere (TOA). The ERB describes…
View article: A deep learning multimodal method for precipitation estimation
A deep learning multimodal method for precipitation estimation Open
Deep-Learning (DL) is a sub-field of Machine-Learning (ML) whose popularity has grown exponentially during the last decade thanks to its numerous successes related to artificial intelligence, e.g. visual object recognition and detection, i…
View article: The Earth Climate Observatory (ECO) space mission concept for themonitoring of the Earth Energy Imbalance (EEI)
The Earth Climate Observatory (ECO) space mission concept for themonitoring of the Earth Energy Imbalance (EEI) Open
Monitoring the Earth Radiation Budget (ERB) and in particular the EarthEnergy Imbalance (EEI), is of paramount importance for a predictiveunderstanding of global climate change.   We propose the new EarthClimate Observatory (ECO)…
View article: Determining Earth’s outgoing radiative flux from a Moon-Based Wide Field-of-view Radiometer
Determining Earth’s outgoing radiative flux from a Moon-Based Wide Field-of-view Radiometer Open
Observing the Earth radiation budget (ERB) at top of the atmosphere (TOA) from space is crucial for monitoring and understanding Earth’s climate. The accurate estimation of Earth’s outgoing radiative flux is of critical importa…
View article: Aerosol Radiative Forcing
Aerosol Radiative Forcing Open
The long term global temperature rise caused by increased greenhouse gas radiative forcing is partially masked by temporary aerosol radiative cooling, which remains poorly known.I present a new purely observation based estimate of Aerosol …
View article: Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator
Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator Open
Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less suscept…
View article: Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring
Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring Open
We report on a near-infrared imaging spectrometer for sensing the three most prominent greenhouse gases in the atmosphere (water vapor, carbon dioxide and methane). The optical design of the spectrometer involves freeform optics, which ena…
View article: A deep learning multimodal method for precipitation estimation: case study of the extreme rainfall from July 2021
A deep learning multimodal method for precipitation estimation: case study of the extreme rainfall from July 2021 Open
<p>In July 2021, western Europe has been subject to extreme rainfall that lead to severe flooding, incurring heavy property losses and claiming dozens of people&#8217;s lives in both Germany and Belgium. This unfortunate disaster…
View article: HiRISE - High-Resolution Imaging and Spectroscopy Explorer - Ultrahigh resolution, interferometric and external occulting coronagraphic science
HiRISE - High-Resolution Imaging and Spectroscopy Explorer - Ultrahigh resolution, interferometric and external occulting coronagraphic science Open
Recent solar physics missions have shown the definite role of waves and magnetic fields deep in the inner corona, at the chromosphere-corona interface, where dramatic and physically dominant changes occur. HiRISE (High Resolution Imaging a…
View article: Centennial Total Solar Irradiance Variation
Centennial Total Solar Irradiance Variation Open
Total Solar Irradiance (TSI) quantifies the solar energy received by the Earth and therefore is of direct relevance for a possible solar influence on climate change on Earth. We analyse the TSI space measurements from 1991 to 2021, and we …
View article: A Deep Learning Multimodal Method for Precipitation Estimation
A Deep Learning Multimodal Method for Precipitation Estimation Open
To improve precipitation estimation accuracy, new methods, which are able to merge different precipitation measurement modalities, are necessary. In this study, we propose a deep learning method to merge rain gauge measurements with a grou…
View article: Artificial Intelligence Revolutionises Weather Forecast, Climate Monitoring and Decadal Prediction
Artificial Intelligence Revolutionises Weather Forecast, Climate Monitoring and Decadal Prediction Open
Artificial Intelligence (AI) is an explosively growing field of computer technology, which is expected to transform many aspects of our society in a profound way. AI techniques are used to analyse large amounts of unstructured and heteroge…
View article: Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation
Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation Open
The measurement of the Earth’s Outgoing Longwave Radiation plays a key role in climate change monitoring. This measurement requires a compact wide-field-of-view camera, covering the 8–14 µm wavelength range, which is not commercially avail…
View article: Dual View on Clear-Sky Top-of-Atmosphere Albedos from Meteosat Second Generation Satellites
Dual View on Clear-Sky Top-of-Atmosphere Albedos from Meteosat Second Generation Satellites Open
Geostationary observations offer the unique opportunity to resolve the diurnal cycle of the Earth’s Radiation Budget at the top of the atmosphere (TOA), crucial for climate-change studies. However, a drawback of the continuous temporal cov…
View article: Trends in spectrally resolved OLR from 10 years of IASI measurements
Trends in spectrally resolved OLR from 10 years of IASI measurements Open
<p>The Earth's Outgoing Longwave Radiation (OLR) is a key component in the study of climate. As part of the Earth's radiation budget, it reflects how the Earth-atmosphere system compensates the incoming solar radiation at the top of …
View article: Editorial for Special Issue “Earth Radiation Budget”
Editorial for Special Issue “Earth Radiation Budget” Open
The Earth Radiation Budget (ERB) at the top of the atmosphere describes how the Earth gains energy from the Sun and loses energy to space through the reflection of solar radiation and the emission of thermal radiation. The ERB is measured …
View article: VACNT versus Black Velvet: a coating analysis for the next-generation Earth Radiation Budget radiometer
VACNT versus Black Velvet: a coating analysis for the next-generation Earth Radiation Budget radiometer Open
Climate on Earth is determined by the Earth Radiation Budget (ERB), which quantifies the incoming and outgoing radiative energy fluxes at the top-of-atmosphere (TOA). The ERB can be monitored from space by non-scanning wide field-of-view r…
View article: Optical System Design of a Wide Field-of-View Camera for the Characterization of Earth’s Reflected Solar Radiation
Optical System Design of a Wide Field-of-View Camera for the Characterization of Earth’s Reflected Solar Radiation Open
We report on the conceptual design of a new wide field-of-view shortwave camera, for measuring Earth’s reflected solar radiation. The camera comprises a commercial-off-the-shelf CMOS sensor, and a custom-designed wide field-of-view lens sy…
View article: Spectrally resolved OLR from IASI measurements
Spectrally resolved OLR from IASI measurements Open
<p>The Earth&#8217;s Outgoing Longwave Radiation (OLR) is a key component in the study of climate feedbacks and processes. As part of the Earth&#8217;s radiation budget, it reflects how the Earth-atmosphere system compensates…
View article: Deep Learning for Precipitation Estimation from Satellite and Rain Gauges Measurements
Deep Learning for Precipitation Estimation from Satellite and Rain Gauges Measurements Open
<p><span>In the coming years, Artificial Intelligence (AI), for which Deep Learning (DL) is an essential component, is expected to transform society in a way that is compared to the introduction of electricity or the introducti…