Searched for: author:"Levelt, Pieternel Felicitas"
(1 - 20 of 20)
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de Gouw, Joost A. (author), Veefkind, j. Pepijn (author), Roosenbrand, Esther (author), Dix, Barbara (author), Lin, John C. (author), Landgraf, Jochen (author), Levelt, Pieternel Felicitas (author)
Production of oil and natural gas in North America is at an all-time high due to the development and use of horizontal drilling and hydraulic fracturing. Methane emissions associated with this industrial activity are a concern because of the contribution to climate radiative forcing. We present new measurements from the space-based...
journal article 2020
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Dix, Barbara (author), de Bruin, Joep (author), Roosenbrand, Esther (author), Vlemmix, T. (author), Francoeur, Colby (author), Gorchov-Negron, Alan (author), McDonald, Brian (author), Zhizhin, Mikhail (author), Elvidge, Christopher (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author), de Gouw, Joost (author)
U.S. oil and natural gas production volumes have grown by up to 100% in key production areas between January 2017 and August 2019. Here we show that recent trends are visible from space and can be attributed to drilling, production, and gas flaring activities. By using oil and gas activity data as predictors in a multivariate regression to...
journal article 2020
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Bauwens, M. (author), Compernolle, S. (author), Stavrakou, T. (author), Müller, J. F. (author), van Gent, J. (author), Eskes, H. (author), Levelt, Pieternel Felicitas (author), van der A, R. (author), Veefkind, j. Pepijn (author)
Spaceborne NO<sub>2</sub> column observations from two high-resolution instruments, Tropospheric Monitoring Instrument (TROPOMI) on board Sentinel-5 Precursor and Ozone Monitoring Instrument (OMI) on Aura, reveal unprecedented NO<sub>2</sub> decreases over China, South Korea, western Europe, and the United States as a result of public health...
journal article 2020
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Liu, Fei (author), Page, Aaron (author), Strode, Sarah A. (author), Yoshida, Yasuko (author), Choi, Sungyeon (author), Zheng, Bo (author), Lamsal, Lok N. (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author)
China's policy interventions to reduce the spread of the coronavirus disease 2019 have environmental and economic impacts. Tropospheric nitrogen dioxide indicates economic activities, as nitrogen dioxide is primarily emitted from fossil fuel consumption. Satellite measurements show a 48% drop in tropospheric nitrogen dioxide vertical column...
journal article 2020
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Nanda, S. (author), de Graaf, M. (author), Veefkind, j. Pepijn (author), Sneep, Maarten (author), Sun, J. (author), Levelt, Pieternel Felicitas (author)
The TROPOspheric Monitoring Instrument (TROPOMI) level-2 aerosol layer height (ALH) product has now been released to the general public. This product is retrieved using TROPOMI's measurements of the oxygen A-band, radiative transfer model (RTM) calculations augmented by neural networks and an iterative optimal estimation technique. The...
journal article 2020
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Sun, J. (author), Veefkind, j. Pepijn (author), Nanda, S. (author), Van Velthoven, Peter (author), Levelt, Pieternel Felicitas (author)
The purpose of this study is to demonstrate the role of aerosol layer height (ALH) in quantifying the single scattering albedo (SSA) from ultraviolet satellite observations for biomass burning aerosols. In the first experiment, we retrieve SSA by minimizing the near-ultraviolet (near-UV) absorbing aerosol index (UVAI) difference between...
journal article 2019
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Chimot, J.J. (author), Veefkind, j. Pepijn (author), De Haan, Johan F. (author), Stammes, Piet (author), Levelt, Pieternel Felicitas (author)
Global mapping of satellite tropospheric NO<sub>2</sub> vertical column density (VCD), a key gas in air quality monitoring, requires accurate retrievals over complex urban and industrialized areas and under any atmospheric conditions. The high abundance of aerosol particles in regions dominated by anthropogenic fossil fuel combustion, e.g....
journal article 2019
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Nanda, Swadhin (author), De Graaf, Martin (author), Veefkind, j. Pepijn (author), Ter Linden, Mark (author), Sneep, Maarten (author), De Haan, Johan (author), Levelt, Pieternel Felicitas (author)
To retrieve aerosol properties from satellite measurements of the oxygen A-band in the near-infrared, a line-by-line radiative transfer model implementation requires a large number of calculations. These calculations severely restrict a retrieval algorithm's operational capability as it can take several minutes to retrieve the aerosol layer...
journal article 2019
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Fu, Dejian (author), Herman, Robert L. (author), Osterman, Gregory B. (author), Liu, Xiong (author), Levelt, Pieternel Felicitas (author), Thompson, Anne M. (author), Luo, Ming (author)
The Tropospheric Emission Spectrometer (TES) on the A-Train Aura satellite was designed to profile tropospheric ozone and its precursors, taking measurements from 2004 to 2018. Starting in 2008, TES global sampling of tropospheric ozone was gradually reduced in latitude, with global coverage stopping in 2011. To extend the record of TES, this...
journal article 2018
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Sun, J. (author), Veefkind, j. Pepijn (author), Van Velthoven, Peter (author), Levelt, Pieternel Felicitas (author)
The absorbing aerosol index (AAI) is a qualitative parameter directly calculated from satellite-measured reflectance. Its sensitivity to absorbing aerosols in combination with a long-term data record since 1978 makes it an important parameter for climate research. In this study, we attempt to quantify aerosol absorption by retrieving the...
journal article 2018
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Nanda, S. (author), Veefkind, j. Pepijn (author), De Graaf, Martin (author), Sneep, Maarten (author), Stammes, Piet (author), De Haan, Johan F. (author), Sanders, Abram F.J. (author), Apituley, Arnoud (author), Tuinder, Olaf (author), Levelt, Pieternel Felicitas (author)
This paper presents a weighted least squares approach to retrieve aerosol layer height from top-of-atmosphere reflectance measurements in the oxygen A band (758-770g nm) over bright surfaces. A property of the measurement error covariance matrix is discussed, due to which photons travelling from the surface are given a higher preference over...
journal article 2018
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Levelt, Pieternel Felicitas (author), Joiner, Joanna (author), Tamminen, Johanna (author), Veefkind, j. Pepijn (author), Bhartia, Pawan K. (author), Zweers, Deborah C.Stein (author), Duncan, Bryan N. (author), Streets, David G. (author), Eskes, Henk (author), Van Der, Ronald A. (author), McLinden, Chris (author), Fioletov, Vitali (author), Carn, Simon (author), De Laat, Jos (author), Deland, Matthew (author), Marchenko, Sergey (author), McPeters, Richard (author), Ziemke, Jerald (author), Fu, Dejian (author), Liu, Xiong (author), Pickering, Kenneth (author), Apituley, Arnoud (author), Abad, Gonzalo González (author), Arola, Antti (author), Boersma, Folkert (author), Miller, Christopher Chan (author), Chance, Kelly (author), de Graaf, M. (author), Hakkarainen, Janne (author), Hassinen, Seppo (author), Ialongo, Iolanda (author), Kleipool, Quintus (author), Krotkov, Nickolay (author), Li, Can (author), Lamsal, Lok (author), Newman, Paul (author), Nowlan, Caroline (author), Suleiman, Raid (author), Tilstra, Lieuwe Gijsbert (author), Torres, Omar (author), Wang, Huiqun (author), Wargan, Krzysztof (author)
This overview paper highlights the successes of the Ozone Monitoring Instrument (OMI) on board the Aura satellite spanning a period of nearly 14 years. Data from OMI has been used in a wide range of applications and research resulting in many new findings. Due to its unprecedented spatial resolution, in combination with daily global coverage,...
review 2018
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Ding, J. (author), Johannes Van Der A, Ronald (author), Mijling, B (author), Jalkanen, J. P. (author), Johansson, L (author), Levelt, Pieternel Felicitas (author)
By applying an inversion algorithm to NO<sub>x</sub> satellite observations from Ozone Monitoring Instrument, monthly NO<sub>x</sub> emissions for a 10 year period (2007 to 2016) over Chinese seas are presented for the first time. No effective regulations on NO<sub>x</sub> emissions have been implemented for ships in China, which is reflected...
journal article 2018
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Nanda, S. (author), De Graaf, Martin (author), Sneep, Maarten (author), De Haan, Johan F. (author), Stammes, Piet (author), Sanders, Abram F.J. (author), Tuinder, Olaf (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author)
Retrieving aerosol optical thickness and aerosol layer height over a bright surface from measured top-of-atmosphere reflectance spectrum in the oxygen A band is known to be challenging, often resulting in large errors. In certain atmospheric conditions and viewing geometries, a loss of sensitivity to aerosol optical thickness has been...
journal article 2018
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Ding, J. (author), Miyazaki, Kazuyuki (author), Johannes Van Der A, Ronald (author), Mijling, Bas (author), Kurokawa, Jun Ichi (author), Cho, Seog Yeon (author), Janssens-Maenhout, Greet (author), Zhang, Qiang (author), Liu, Fei (author), Levelt, Pieternel Felicitas (author)
We compare nine emission inventories of nitrogen oxides including four satellite-derived NO<sub>x</sub> inventories and the following bottom-up inventories for East Asia: REAS (Regional Emission inventory in ASia), MEIC (Multiresolution Emission Inventory for China), CAPSS (Clean Air Policy Support System) and EDGAR (Emissions Database for...
journal article 2017
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Schenkeveld, V. M.Erik (author), Jaross, Glen (author), Marchenko, Sergey (author), Haffner, David (author), Kleipool, Quintus L. (author), Rozemeijer, Nico C. (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author)
The Dutch-Finnish Ozone Monitoring Instrument (OMI) is an imaging spectrograph flying on NASA's EOS Aura satellite since 15 July 2004. OMI is primarily used to map trace-gas concentrations in the Earth's atmosphere, obtaining mid-resolution (0.4-0.6 nm) ultraviolet-visible (UV-VIS; 264-504 nm) spectra at multiple (30-60) simultaneous fields...
journal article 2017
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Ding, Jieying (author), Johannes Van Der A, Ronald (author), Mijling, Bas (author), Levelt, Pieternel Felicitas (author)
We improve the emission estimate algorithm DECSO (Daily Emission estimates Constrained by Satellite Observations) to better detect NO<sub>x</sub> emissions over remote areas. The new version is referred to as DECSO v5. The error covariance of the sensitivity of NO<sub>2</sub> column observations to gridded NO<sub>x</sub> emissions has been...
journal article 2017
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Veefkind, j. Pepijn (author), De Haan, Johan F. (author), Sneep, Maarten (author), Levelt, Pieternel Felicitas (author)
The OMI (Ozone Monitoring Instrument on board NASA's Earth Observing System (EOS) Aura satellite) OMCLDO2 cloud product supports trace gas retrievals of for example ozone and nitrogen dioxide. The OMCLDO2 algorithm derives the effective cloud fraction and effective cloud pressure using a DOAS (differential optical absorption spectroscopy) fit...
journal article 2016
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Krotkov, Nickolay A. (author), McLinden, Chris A. (author), Li, Can (author), Lamsal, Lok N. (author), Celarier, Edward A. (author), Marchenko, Sergey V. (author), Swartz, William H. (author), Bucsela, Eric J. (author), Joiner, Joanna (author), Duncan, Bryan N. (author), Folkert Boersma, K. (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author), Fioletov, Vitali E. (author), Dickerson, Russell R. (author), He, Hao (author), Lu, Zifeng (author), Streets, David G. (author)
The Ozone Monitoring Instrument (OMI) onboard NASA's Aura satellite has been providing global observations of the ozone layer and key atmospheric pollutant gases, such as nitrogen dioxide (NO2) and sulfur dioxide (SO2), since October 2004. The data products from the same instrument provide consistent spatial and temporal coverage and permit...
journal article 2016
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Vlemmix, T. (author), Hendrick, F (author), Pinardi, G (author), De Smedt, I (author), Fayt, C (author), Hermans, C. (author), Piters, AJM (author), Wang, P. (author), Levelt, Pieternel Felicitas (author), van Roozendael, M (author)
A 4-year data set of MAX-DOAS observations in the Beijing area (2008-2012) is analysed with a focus on NO2, HCHO and aerosols. Two very different retrieval methods are applied. Method A describes the tropospheric profile with 13 layers and makes use of the optimal estimation method. Method B uses 2-4 parameters to describe the tropospheric...
journal article 2015
Searched for: author:"Levelt, Pieternel Felicitas"
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