Search Results - "Doug Degenstein"

Tomographic Retrievals of Hunga Tonga‐Hunga Ha'apai Volcanic Aerosol by Bourassa, Adam E., Zawada, Daniel J., Rieger, Landon A., Warnock, Taran W., Toohey, Matthew, Degenstein, Doug A.

“…The 2022 eruption of the Hunga Tonga‐Hunga Ha'apai volcano caused substantial impacts on the atmosphere, including a massive injection of water vapor, and the…”
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Tropopause‐Level NOx in the Asian Summer Monsoon by Dubé, Kimberlee, Randel, William, Bourassa, Adam, Degenstein, Doug

“…Deep convection within the Asian summer monsoon (ASM) transports surface level air into the upper troposphere‐lower stratosphere (UTLS). This work aims to…”
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Updated Trends of the Stratospheric Ozone Vertical Distribution in the 60°S-60°N Latitude Range Based on the LOTUS Regression Model by Godin-Beekmann, Sophie, Azouz, Niramson, Sofieva, Viktoria, Hubert, Daan, Petropavlovskikh, Irina, Effertz, Peter, Ancellet, Gérard, Degenstein, Doug A, Zawada, Daniel, Froidevaux, Lucien, Frith, Stacey, Wild, Jeannette, Davis, Sean, Steinbrecht, Wolfgang, Leblanc, Thierry, Querel, Richard, Tourpali, Kleareti, Damadeo, Robert, Maillard-Barras, Eliane, Stübi, René, Vigouroux, Corinne, Arosio, Carlo, Nedoluha, Gerald, Boyd, Ian, Malderen, Roeland Van, Mahieu, Emmanuel, Smale, Dan, Sussmann, Ralf

“…This study presents an updated evaluation of stratospheric ozone profile trends in the 60°S - 60°N latitude range over the 2000 - 2020 period using an updated…”
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Evidence for a Continuous Decline in Lower Stratospheric Ozone Offsetting Ozone Layer Recovery by Ball, William T., Alsing, Justin, Mortlock, Daniel J., Staehelin, Johannes, Haigh, Joanna D., Peter, Thomas, Tummon, Fiona, Stuebi, Rene, Stenke, Andrea, Anderson, John, Bourassa, Adam, Davis, Sean M., Degenstein, Doug, Frith, Stacey, Froidevaux, Lucien, Roth, Chris, Sofieva, Viktoria, Wang, Ray, Wild, Jeanette, Yu, Pengfei, Ziemke, Jerald R., Rozanov, Eugene V.

“…Ozone forms in the Earth's atmosphere from the photodissociation of molecular oxygen, primarily in the tropical stratosphere. It is then transported to the…”
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Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations by Khaykin, Sergey M, Godin-Beekmann, Sophie, Keckhut, Philippe, Hauchecorne, Alain, Jumelet, Julien, Vernier, Jean-Paul, Bourassa, Adam, Degenstein, Doug A, Rieger, Landon A, Bingen, Christine, Vanhellemont, Filip, Robert, Charles, DeLand, Matthew, Bhartia, Pawan K

“…The article presents new high-quality continuous stratospheric aerosol observations spanning 1994–2015 at the French Observatoire de Haute-Provence (OHP,…”
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Major influence of tropical volcanic eruptions on the stratospheric aerosol layer during the last decade by Vernier, J.-P., Thomason, L. W., Pommereau, J.-P., Bourassa, A., Pelon, J., Garnier, A., Hauchecorne, A., Blanot, L., Trepte, C., Degenstein, Doug, Vargas, F.

“…The variability of stratospheric aerosol loading between 1985 and 2010 is explored with measurements from SAGE II, CALIPSO, GOMOS/ENVISAT, and OSIRIS/Odin…”
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Model estimations of geophysical variability between satellite measurements of ozone profiles by Sheese, Patrick E, Walker, Kaley A, Boone, Chris D, Degenstein, Doug A, Kolonjari, Felicia, Plummer, David, Kinnison, Douglas E, Jöckel, Patrick, von Clarmann, Thomas

“…In order to validate satellite measurements of atmospheric composition, it is necessary to understand the range of random and systematic uncertainties inherent…”
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Observations of the eruption of the Sarychev volcano and simulations using the HadGEM2 climate model by Haywood, James M., Jones, Andy, Clarisse, Lieven, Bourassa, Adam, Barnes, John, Telford, Paul, Bellouin, Nicolas, Boucher, Olivier, Agnew, Paul, Clerbaux, Cathy, Coheur, Pierre, Degenstein, Doug, Braesicke, Peter

“…In June 2009 the Sarychev volcano located in the Kuril Islands to the northeast of Japan erupted explosively, injecting ash and an estimated 1.2 ± 0.2 Tg of…”
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Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations by Berthet, Gwenaël, Jégou, Fabrice, Catoire, Valéry, Krysztofiak, Gisèle, Renard, Jean-Baptiste, Bourassa, Adam E, Degenstein, Doug A, Brogniez, Colette, Dorf, Marcel, Kreycy, Sebastian, Pfeilsticker, Klaus, Werner, Bodo, Lefèvre, Franck, Roberts, Tjarda J, Lurton, Thibaut, Vignelles, Damien, Bègue, Nelson, Bourgeois, Quentin, Daugeron, Daniel, Chartier, Michel, Robert, Claude, Gaubicher, Bertrand, Guimbaud, Christophe

“…The major volcanic eruption of Mount Pinatubo in 1991 has been shown to have significant effects on stratospheric chemistry and ozone depletion even at…”
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Assessment of the quality of ACE-FTS stratospheric ozone data by Sheese, Patrick E, Walker, Kaley A, Boone, Chris D, Bourassa, Adam E, Degenstein, Doug A, Froidevaux, Lucien, McElroy, C. Thomas, Murtagh, Donal, Russell III, James M, Zou, Jiansheng

“…For the past 17 years, the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) instrument on the Canadian SCISAT satellite has been…”
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Stratospheric aerosol characteristics from space-borne observations: extinction coefficient and Ångström exponent by Malinina, Elizaveta, Rozanov, Alexei, Rieger, Landon, Bourassa, Adam, Bovensmann, Heinrich, Burrows, John P., Degenstein, Doug

“…Stratospheric aerosols are of a great importance to the scientific community, predominantly because of their role in climate, but also because accurate…”
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A study of the approaches used to retrieve aerosol extinction, as applied to limb observations made by OSIRIS and SCIAMACHY by Rieger, Landon A, Malinina, Elizaveta P, Rozanov, Alexei V, Burrows, John P, Bourassa, Adam E, Degenstein, Doug A

“…Limb scatter instruments in the UV–vis spectral range have provided long-term global records of stratospheric aerosol extinction important for climate records…”
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Satellite Limb Observations of Unprecedented Forest Fire Aerosol in the Stratosphere by Bourassa, Adam E., Rieger, Landon A., Zawada, Daniel J., Khaykin, Sergey, Thomason, L. W., Degenstein, Doug A.

“…Intense forest fires in western North America during August 2017 caused smoke plumes that reached the stratosphere. While this phenomenon has often been…”
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Retrieval of daytime mesospheric ozone using OSIRIS observations of O2 (a1Δg) emission by Li, Anqi, Roth, Chris Z, Pérot, Kristell, Ole Martin Christensen, Bourassa, Adam, Degenstein, Doug A, Murtagh, Donal P

“…Improving knowledge of the ozone global distributions in the mesosphere–lower thermosphere (MLT) is a crucial step in understanding the behaviour of the middle…”
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The Atmospheric Imaging Mission for Northern Regions: AIM-North by Ray Nassar, Chris McLinden, Christopher E. Sioris, C. T. McElroy, Joseph Mendonca, Johanna Tamminen, Cameron G. MacDonald, Cristen Adams, Céline Boisvenue, Adam Bourassa, Ryan Cooney, Doug Degenstein, Guillaume Drolet, Louis Garand, Ralph Girard, Markey Johnson, Dylan B.A. Jones, Felicia Kolonjari, Bruce Kuwahara, Randall V. Martin, Charles E. Miller, Norman O’Neill, Aku Riihelä, Sébastien Roche, Stanley P. Sander, William R. Simpson, Gurpreet Singh, Kimberly Strong, Alexander P. Trishchenko, Helena van Mierlo, Zahra Vaziri Zanjani, Kaley A. Walker, Debra Wunch

“…AIM-North is a proposed satellite mission that would provide observations of unprecedented frequency and density for monitoring northern greenhouse gases…”
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First simultaneous retrievals of horizontal and vertical structures of Polar Mesospheric Clouds from Odin/OSIRIS tomography by Hultgren, Kristoffer, Gumbel, Jörg, Degenstein, Doug, Bourassa, Adam, Lloyd, Nick, Stegman, Jacek

“…Limb-scanning satellites can provide global information about the vertical structure of Polar Mesospheric Clouds. However, information about horizontal…”
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Analysis of satellite remote sensing observations of low ozone events in the tropical upper troposphere and links with convection by Cooper, Matthew J., Martin, Randall V., Livesey, Nathaniel J., Degenstein, Doug A., Walker, Kaley A.

“…Satellite observations from three instruments (Microwave Limb Sounder, Optical Spectrograph and Infrared Imaging System, and Atmospheric Chemistry Experiment…”
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Validation of ACE-FTS version 3.5 NOy species profiles using correlative satellite measurements by Sheese, Patrick E, Walker, Kaley A, Boone, Chris D, McLinden, Chris A, Bernath, Peter F, Bourassa, Adam E, Burrows, John P, Degenstein, Doug A, Funke, Bernd, Fussen, Didier, Manney, Gloria L, McElroy, C Thomas, Murtagh, Donal, Randall, Cora E, Raspollini, Piera, Rozanov, Alexei, Russell, James M, Suzuki, Makoto, Shiotani, Masato, Urban, Joachim, Thomas von Clarmann, Zawodny, Joseph M

“…The ACE-FTS (Atmospheric Chemistry Experiment - Fourier Transform Spectrometer) instrument on the Canadian SCISAT satellite, which has been in operation for…”
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Evaluation of ACE-FTS and OSIRIS Satellite retrievals of ozone and nitric acid in the tropical upper troposphere: Application to ozone production efficiency by Cooper, Matthew, Martin, Randall V., Sauvage, Bastien, Boone, Chris D., Walker, Kaley A., Bernath, Peter F., McLinden, Chris A., Degenstein, Doug A., Volz-Thomas, Andreas, Wespes, Catherine

“…We evaluate climatologies of upper tropospheric ozone and nitric acid retrieved from two satellite instruments (ACE‐FTS and OSIRIS) with long‐term in situ…”
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Ground-based assessment of the bias and long-term stability of 14 limb and occultation ozone profile data records by Hubert, Daan, Lambert, Jean-Christopher, Verhoelst, Tijl, Granville, José, Keppens, Arno, Baray, Jean-Luc, Bourassa, Adam E, Cortesi, Ugo, Degenstein, Doug A, Froidevaux, Lucien, Godin-Beekmann, Sophie, Hoppel, Karl W, Johnson, Bryan J, Kyrölä, Erkki, Leblanc, Thierry, Lichtenberg, Günter, Marchand, Marion, McElroy, C. Thomas, Murtagh, Donal, Nakane, Hideaki, Portafaix, Thierry, Querel, Richard, Russell III, James M, Salvador, Jacobo, Smit, Herman G. J, Stebel, Kerstin, Steinbrecht, Wolfgang, Strawbridge, Kevin B, Stübi, René, Swart, Daan P. J, Taha, Ghassan, Tarasick, David W, Thompson, Anne M, Urban, Joachim, van Gijsel, Joanna A. E, Van Malderen, Roeland, von der Gathen, Peter, Walker, Kaley A, Wolfram, Elian, Zawodny, Joseph M

“…The ozone profile records of a large number of limb and occultation satellite instruments are widely used to address several key questions in ozone research…”
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