Search Results - "N. Theys"

Satellite Evidence of HONO/NO2 Increase With Fire Radiative Power by Fredrickson, C. D., Theys, N., Thornton, J. A.

“…Wildfires are important sources of atmospheric reactive nitrogen. The reactive nitrogen species partitioning generally depends on fire characteristics. One…”
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Diurnal, seasonal and long-term variations of global formaldehyde columns inferred from combined OMI and GOME-2 observations by De Smedt, I., Stavrakou, T., Hendrick, F., Danckaert, T., Vlemmix, T., Pinardi, G., Theys, N., Lerot, C., Gielen, C., Vigouroux, C., Hermans, C., Fayt, C., Veefkind, P., Müller, J.-F., Van Roozendael, M.

“…We present the new version (v14) of the BIRA-IASB algorithm for the retrieval of formaldehyde (H2CO) columns from spaceborne UV–visible sensors. Applied to OMI…”
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Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires by Theys, N., Volkamer, R., Müller, J.-F., Zarzana, K. J., Kille, N., Clarisse, L., De Smedt, I., Lerot, C., Finkenzeller, H., Hendrick, F., Koenig, T. K., Lee, C. F., Knote, C., Yu, H., Van Roozendael, M.

“…Nitrous acid (HONO) is a precursor of the hydroxyl radical in the atmosphere, which controls the degradation of greenhouse gases, contributes to photochemical…”
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Global monitoring of volcanic SO 2 degassing with unprecedented resolution from TROPOMI onboard Sentinel-5 Precursor by Theys, N, Hedelt, P, De Smedt, I, Lerot, C, Yu, H, Vlietinck, J, Pedergnana, M, Arellano, S, Galle, B, Fernandez, D, Carlito, C J M, Barrington, C, Taisne, B, Delgado-Granados, H, Loyola, D, Van Roozendael, M

“…Over the last four decades, space-based nadir observations of sulfur dioxide (SO ) proved to be a key data source for assessing the environmental impacts of…”
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Satellite Evidence for Glyoxal Depletion in Elevated Fire Plumes by Lerot, C., Müller, J.‐F., Theys, N., Smedt, I., Stavrakou, T., Roozendael, M.

“…Space‐borne observations are used to characterize the fate of formaldehyde and glyoxal in wildfire plumes. Their distribution measured by the Tropospheric…”
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Tropospheric bromine chemistry: implications for present and pre-industrial ozone and mercury by Parrella, J. P, Jacob, D. J, Liang, Q, Zhang, Y, Mickley, L. J, Miller, B, Evans, M. J, Yang, X, Pyle, J. A, Theys, N, Van Roozendael, M

“…We present a new model for the global tropospheric chemistry of inorganic bromine (Bry) coupled to oxidant-aerosol chemistry in the GEOS-Chem chemical…”
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Sulfur dioxide vertical column DOAS retrievals from the Ozone Monitoring Instrument: Global observations and comparison to ground‐based and satellite data by Theys, N., De Smedt, I., Gent, J., Danckaert, T., Wang, T., Hendrick, F., Stavrakou, T., Bauduin, S., Clarisse, L., Li, C., Krotkov, N., Yu, H., Brenot, H., Van Roozendael, M.

“…We present a new data set of sulfur dioxide (SO2) vertical columns from observations of the Ozone Monitoring Instrument (OMI)/AURA instrument between 2004 and…”
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Global monitoring of volcanic SO2 degassing with unprecedented resolution from TROPOMI onboard Sentinel-5 Precursor by Theys, N., Hedelt, P., De Smedt, I., Lerot, C., Yu, H., Vlietinck, J., Pedergnana, M., Arellano, S., Galle, B., Fernandez, D., Carlito, C. J. M., Barrington, C., Taisne, B., Delgado-Granados, H., Loyola, D., Van Roozendael, M.

“…Over the last four decades, space-based nadir observations of sulfur dioxide (SO 2 ) proved to be a key data source for assessing the environmental impacts of…”
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S‐5P/TROPOMI‐Derived NOx Emissions From Copper/Cobalt Mining and Other Industrial Activities in the Copperbelt (Democratic Republic of Congo and Zambia) by Martínez‐Alonso, S., Veefkind, J. P., Dix, B., Gaubert, B., Theys, N., Granier, C., Soulié, A., Darras, S., Eskes, H., Tang, W., Worden, H., Gouw, J., Levelt, P. F.

“…We have analyzed Sentinel‐5 Precursor TROPOspheric Monitoring Instrument (TROPOMI) data over the Copperbelt mining region (Democratic Republic of Congo and…”
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Volcanic SO2 fluxes derived from satellite data: a survey using OMI, GOME-2, IASI and MODIS by Theys, N, Campion, R, Clarisse, L, Brenot, H, van Gent, J, Dils, B, Corradini, S, Merucci, L, Coheur, P.-F, Van Roozendael, M, Hurtmans, D, Clerbaux, C, Tait, S, Ferrucci, F

“…Sulphur dioxide (SO2 ) fluxes of active degassing volcanoes are routinely measured with ground-based equipment to characterize and monitor volcanic activity…”
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The 2011 Nabro eruption, a SO2 plume height analysis using IASI measurements by Clarisse, L., Coheur, Pierre-François, Theys, N., Hurtmans, D., Clerbaux, Cathy

“…In the wake of the June 2011 Nabro eruption, large stratospheric plumes were observed by several instruments up to altitudes of 21 km, much higher than initial…”
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Snow-sourced bromine and its implications for polar tropospheric ozone by Yang, X., Pyle, J. A., Cox, R. A., Theys, N., Van Roozendael, M.

“…In the last two decades, significant depletion of boundary layer ozone (ozone depletion events, ODEs) has been observed in both Arctic and Antarctic spring…”
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Global observations of tropospheric BrO columns using GOME-2 satellite data by Theys, N., Van Roozendael, M., Hendrick, F., Yang, X., De Smedt, I., Richter, A., Begoin, M., Errera, Q., Johnston, P. V., Kreher, K., De Mazière, M.

“…Measurements from the GOME-2 satellite instrument have been analyzed for tropospheric BrO using a residual technique that combines measured BrO columns and…”
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Improved retrieval of global tropospheric formaldehyde columns from GOME-2/MetOp-A addressing noise reduction and instrumental degradation issues by De Smedt, I, Van Roozendael, M, Stavrakou, T, Müller, J.-F, Lerot, C, Theys, N, Valks, P, Hao, N, van der A, R

“…We present a new dataset of formaldehyde vertical columns retrieved from observations of GOME-2 on board the EUMETSAT MetOp-A platform between 2007 and 2011…”
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An exemplary case of a bromine explosion event linked to cyclone development in the Arctic by Blechschmidt, A.-M, Richter, A, Burrows, J. P, Kaleschke, L, Strong, K, Theys, N, Weber, M, Zhao, X, Zien, A

“…Intense, cyclone-like shaped plumes of tropospheric bromine monoxide (BrO) are regularly observed by GOME-2 on board the MetOp-A satellite over Arctic sea ice…”
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Evaluation of tropospheric SO2 retrieved from MAX-DOAS measurements in Xianghe, China by T. Wang, F. Hendrick, P. Wang, G. Tang, K. Clémer, H. Yu, C. Fayt, C. Hermans, C. Gielen, J.-F. Müller, G. Pinardi, N. Theys, H. Brenot, M. Van Roozendael

“…Ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of sulfur dioxide (SO2) have been performed at the Xianghe station…”
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Support to Aviation Control Service (SACS): an online service for near-real-time satellite monitoring of volcanic plumes by Brenot, H, Theys, N, Clarisse, L, van Geffen, J, van Gent, J, Van Roozendael, M, van der A, R, Hurtmans, D, Coheur, P.-F, Clerbaux, C, Valks, P, Hedelt, P, Prata, F, Rasson, O, Sievers, K, Zehner, C

“…Volcanic eruptions emit plumes of ash and gases into the atmosphere, potentially at very high altitudes. Ash-rich plumes are hazardous for airplanes as ash is…”
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Anthropogenic sulphur dioxide load over China as observed from different satellite sensors by Koukouli, M.E., Balis, D.S., van der A, Ronald Johannes, Theys, N., Hedelt, P., Richter, A., Krotkov, N., Li, C., Taylor, M.

“…China, with its rapid economic growth and immense exporting power, has been the focus of many studies during this previous decade quantifying its increasing…”
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Raman imaging as a new analytical tool for the quality control of the monitoring of osteogenic differentiation in forming 3D bone tissue by De Bleye, C., Fontaine, M., Dumont, E., Sacré, P.-Y., Hubert, Ph, Theys, N., Ziemons, E.

“…[Display omitted] •Monitoring the osteogenic differentiation in forming 3D bone tissue using MTMR.•Comparison of the osteogenic differentiation process between…”
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Satellite observations of long range transport of a large BrO plume in the Arctic by Begoin, M., Richter, A., Weber, M., Kaleschke, L., Tian-Kunze, X., Stohl, A., Theys, N., Burrows, J. P.

“…Ozone Depletion Events (ODE) during polar springtime are a well known phenomenon in the Arctic and Antarctic boundary layer. They are caused by the catalytic…”
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