A5076733174- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Spectroscopy and Laser Applications
- Hydrocarbon exploration and reservoir analysis
- Meteorological Phenomena and Simulations
- Catalytic Processes in Materials Science
- Ionosphere and magnetosphere dynamics
- Astrophysics and Cosmic Phenomena
- Calibration and Measurement Techniques
- Radioactivity and Radon Measurements
- Astrophysical Phenomena and Observations
- Seismic Waves and Analysis
- Atmospheric aerosols and clouds
- Gas Sensing Nanomaterials and Sensors
- Radioactive Decay and Measurement Techniques
- Methane Hydrates and Related Phenomena
- High-pressure geophysics and materials
Royal Netherlands Meteorological Institute
2009-2024
Vrije Universiteit Amsterdam
2019-2024
Delft University of Technology
2019
University of Amsterdam
2019
Space Research Organisation Netherlands
2009
In this study the depth of atmospheric boundary layer (ABL) over Tibetan Plateau was measured during a regional radiosonde observation campaign in 2008 and found to be deeper than indicated by previously measurements. Results indicate that fair weather conditions on winter days, top mixed layers can up 5 km above ground (9.4 sea level). Measurements also show ABL is quite distinct for three different periods (winter, monsoon-onset, monsoon seasons). Turbulence at deep mixing rise upper...
Abstract. Atmospheric inversion approaches are expected to play a critical role in future observation-based monitoring systems for surface fluxes of greenhouse gases (GHGs), pollutants and other trace gases. In the past decade, research community has developed various software, mainly using variational or ensemble Bayesian optimization methods, with assumptions on uncertainty structures prior information atmospheric chemistry–transport models. Each them can assimilate some all available...
Abstract. A methodology for the round-robin evaluation and geophysical validation of ozone profile data retrieved from nadir UV backscatter satellite measurements is detailed discussed, consisting set content studies, information co-location comparisons with reference measurements. Within European Space Agency's Climate Change Initiative on (Ozone_cci project), proposed procedure applied to two sets at Royal Netherlands Meteorological Institute (KNMI) Rutherford Appleton Laboratory (RAL,...
Abstract. For the retrieval of vertical distribution ozone in atmosphere Ozone ProfilE Retrieval Algorithm (OPERA) has been further developed. The new version (1.26) OPERA is capable retrieving profiles from UV–VIS observations most nadir-looking satellite instruments like GOME, SCIAMACHY, OMI and GOME-2. setup described results are presented for GOME GOME-2 observations. retrieved globally compared to sondes years 1997 2008. Relative differences between GOME/GOME-2 within limits as...
<i>Aims. <i/>We present the spectral analysis of a large set XMM-<i>Newton<i/> observations EXO 0748–676, bright dipping low-mass X-ray binary. In particular, we focus on phenomenon as result changes in properties ionised gas close to source. <i>Methods. analysed high-resolution spectra collected with reflection grating spectrometer board <i>XMM-Newton<i/>. We studied and persistent separately. used Epic data constrain broad-band continuum. explored two simple geometrical scenarios for which...
Abstract. The new platforms for Earth observation from space are characterized by measurements made with great spatial and temporal resolution. While this abundance of information makes it possible to detect study localized phenomena, on the other hand may be difficult manage large amount data in global scale phenomena. A particularly significant example is use assimilation systems level 2 products that represent gas profiles atmosphere. models which based discretized grids horizontal...
Abstract. Atmospheric inversion approaches are expected to play a critical role in future observation-based monitoring systems for surface greenhouse gas (GHG) fluxes. In the past decade, research community has developed various softwares, mainly using variational or ensemble Bayesian optimization methods, with assumptions on uncertainty structures and prior information atmospheric chemistry-transport models. Each of them can assimilate some all available observation streams its domain area...
Abstract. Monitoring the spatial distribution and trends in surface greenhouse gas (GHG) fluxes, as well flux attribution to natural anthropogenic processes, is essential track progress under Paris Agreement inform its global stocktake. This study updates earlier syntheses (Petrescu et al., 2020, 2021, 2023), provides a consolidated synthesis of CH4 emissions using bottom-up (BU) top-down (TD) approaches for European Union (EU), expanded include seven additional countries with large and/or...
Abstract. Atmospheric ozone plays a key role in air quality and the radiation budget of Earth, both directly through its chemical influence on other trace gases. Assessments atmospheric distribution associated climate change therefore demand accurate vertically resolved observations with stratospheric tropospheric sensitivity, global regional scales, long term at shorter timescales. Such have been acquired by two series European nadir-viewing profilers, namely scattered-light UV–visible...
Abstract. A three-dimensional global ozone distribution has been derived from assimilation of profiles that were observed by satellites. By simultaneous retrieved the nadir looking satellite instruments Global Ozone Monitoring Experiment 2 (GOME-2) and Instrument (OMI), which measure atmosphere at different times day, quality atmospheric field improved. The is using an extended Kalman filter in chemical transport model TM5 used for forecast. combined both GOME-2 OMI improves upon results a...
We present Global Ozone Monitoring Experiment‐2 (GOME‐2) ozone profiles that were operationally retrieved with the KNMI ProfilE Retrieval Algorithm (OPERA) algorithm for period September–December 2008. It is shown it possible to accurately measure vertical distribution of stratospheric Antarctic hole conditions from spectra measured at ultraviolet wavelengths a nadir viewing instrument. Comparisons sonde observations Neumayer station coast show good agreement various profile shapes...
Abstract. We have assessed the sensitivity of operational Ozone Monitoring Instrument (OMI) ozone profile retrieval algorithm to a number priori and radiative transfer assumptions. studied effect stray light correction, surface albedo assumptions profiles on retrieved profile. Then, we how modify improve tropospheric ozone. found that corrections significant but mainly at high altitudes. Surface assumptions, other hand, largest impact lowest layers. Choice an climatology which is used as...
With the launch of Sentinel-5 Precursor (S-5P, lifted-off on 13 October 2017), Sentinel-4 (S-4) and (S-5)(from 2021 2023 onwards, respectively) operational missions ESA/EU Copernicus program, a massive amount atmospheric composition data with unprecedented quality will become available from geostationary (GEO) low Earth orbit (LEO) observations. Enhanced observational capabilities are expected to foster deeper insight than ever before key issues relevant for air quality, stratospheric ozone,...
Abstract. Monitoring the spatial distribution and trends in surface greenhouse gas (GHG) fluxes, as well flux attribution to natural anthropogenic processes, is essential track progress under Paris Agreement inform its Global Stocktake. This study updates earlier syntheses (Petrescu et al., 2020, 2021, 2023) provides a consolidated synthesis of CH4 emissions using bottom-up (BU) top-down (TD) approaches for European Union (EU) seven additional countries with large and/or (USA, Brazil, China,...
Abstract. Ozone profile retrieval from nadir-viewing satellite instruments operating in the ultraviolet–visible range requires accurate calibration of Level-1 (L1) radiance data. Here we study effects on derived Level-2 (L2) ozone profiles for three versions SCanning Imaging Absorption spectroMeter Atmospheric ChartograpHY (SCIAMACHY) L1 data: version 7 (v7), with m-factors (v7mfac) and 8 (v8). We retrieve nadir SCIAMACHY instrument that flew board Envisat using ProfilE Retrieval Algorithm...
Abstract. The new platforms for Earth observation from space are characterized by measurements made at great spatial and temporal resolutions. While this abundance of information makes it possible to detect study localized phenomena, may be difficult manage large amount data the global large-scale phenomena. A particularly significant example is use assimilation systems Level 2 products that represent gas profiles in atmosphere. models on which based discretized grids with horizontal...
Abstract. A methodology for the round-robin evaluation and geophysical validation of ozone profile data retrieved from nadir UV backscatter satellite measurements is detailed discussed, consisting dataset content studies, information co-location comparisons with reference measurements. Within ESA's Climate Change Initiative on (Ozone_cci project), proposed procedure applied to two datasets at KNMI RAL, using their respective OPERA v1.26 RAL v2.1 optimal estimation algorithms, MetOp-A GOME-2...
Abstract. Atmospheric ozone plays a key role in air quality and the radiation budget of Earth, both directly through its chemical influence on other trace gases. Assessments atmospheric distribution associated climate change therefore demand accurate vertically-resolved observations with stratospheric tropospheric sensitivity, global regional scales, long term at shorter timescales. Such have been acquired by two series European nadir-viewing profilers, namely scattered-light UV-visible...
&lt;p&gt;This study investigates the use of total column methane measurements from TROPOMI satellite instrument for estimating global sources and sinks methane. A bias correction method has been developed based on a comparison between an inversion using surface only, building experience GOSAT data. The is applied to prior data in inversion. Results will be shown inversions TM5 4D-VAR CarboScope inverse modelling systems two years inversion-optimized mixing ratios are inter-compared...
Abstract. The depletion of the Antarctic ozone layer and its changing vertical distribution has been monitored closely by satellites in past decades ever since hole was discovered 1980's. Ozone profile retrieval from nadir-viewing operating ultraviolet-visible range requires accurate calibration level-1 (L1) radiance data. Here we study effects on derived level-2 (L2) profiles apply to region. We retrieve nadir SCIAMACHY instrument that flew on-board Envisat using ProfilE Retrieval...