Search Results - "Hannigan, James W."

The Network for the Detection of Atmospheric Composition Change (NDACC): History, Status and Perspectives by De Maziere, Martine, Thompson, Anne M., Kurylo, Michael J., Wild, Jeannette D., Bernhard, Germar, Blumenstock, Thomas, Braathen, Geir O., Hannigan, James W., Lambert, Jean-Christopher, Leblanc, Thierry, McGee, Thomas J., Nedoluha, Gerald, Petropavlovskikh, Irina, Seckmeyer, Gunther, Simon, Paul C., Steinbrecht, Wolfgang, Strahan, Susan E.

“…The Network for the Detection of Atmospheric Composition Change (NDACC) is an international global network of more than 90 stations making high-quality…”
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Reversal of global atmospheric ethane and propane trends largely due to US oil and natural gas production by Helmig, Detlev, Rossabi, Samuel, Hueber, Jacques, Tans, Pieter, Montzka, Stephen A., Masarie, Ken, Thoning, Kirk, Plass-Duelmer, Christian, Claude, Anja, Carpenter, Lucy J., Lewis, Alastair C., Punjabi, Shalini, Reimann, Stefan, Vollmer, Martin K., Steinbrecher, Rainer, Hannigan, James W., Emmons, Louisa K., Mahieu, Emmanuel, Franco, Bruno, Smale, Dan, Pozzer, Andrea

“…Atmospheric non-methane hydrocarbon concentrations began declining in the 1970s. Surface and column measurements show that Northern Hemisphere ethane…”
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COVID-19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere by Steinbrecht, Wolfgang, Kubistin, Dagmar, Plass-Dülmer, Christian, Davies, Jonathan, Gathen, Peter Von Der, Deckelmann, Holger, Jepsen, Nis, Kivi, Rigel, Lyall, Norrie, Palm, Matthias, Notholt, Justus, Kois, Bogumil, Oelsner, Peter, Allaart, Marc, Piters, Ankie, Gill, Michael, Malderen, Roeland Van, Delcloo, Andy W., Sussmann, Ralf, Mahieu, Emmanuel, Servais, Christian, Romanens, Gonzague, Stübi, Rene, Ancellet, Gerard, Godin-Beekmann, Sophie, Yamanouchi, Shoma, Strong, Kimberly, Johnson, Bryan, Cullis, Patrick, Petropavlovskikh, Irina, Chouza, Fernando, Leblanc, Thierry, Strahan, Susan, Stauffer, Ryan M., Thompson, Anne M.

“…Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low ozone in the free troposphere. From April to August, and…”
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TROPOMI–Sentinel-5 Precursor formaldehyde validation using an extensive network of ground-based Fourier-transform infrared stations by Vigouroux, Corinne, Langerock, Bavo, Bauer Aquino, Carlos Augusto, Blumenstock, Thomas, Cheng, Zhibin, De Mazière, Martine, De Smedt, Isabelle, Grutter, Michel, Hannigan, James W, Jones, Nicholas, Kivi, Rigel, Loyola, Diego, Lutsch, Erik, Mahieu, Emmanuel, Makarova, Maria, Metzger, Jean-Marc, Morino, Isamu, Murata, Isao, Nagahama, Tomoo, Notholt, Justus, Ortega, Ivan, Palm, Mathias, Pinardi, Gaia, Röhling, Amelie, Smale, Dan, Stremme, Wolfgang, Strong, Kim, Sussmann, Ralf, Té, Yao, van Roozendael, Michel, Wang, Pucai, Winkler, Holger

“…TROPOMI (the TROPOspheric Monitoring Instrument), on board the Sentinel-5 Precursor (S5P) satellite, has been monitoring the Earth's atmosphere since…”
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Detection and attribution of wildfire pollution in the Arctic and northern midlatitudes using a network of Fourier-transform infrared spectrometers and GEOS-Chem by Lutsch, Erik, Strong, Kimberly, Jones, Dylan B. A, Blumenstock, Thomas, Conway, Stephanie, Fisher, Jenny A, Hannigan, James W, Hase, Frank, Kasai, Yasuko, Mahieu, Emmanuel, Makarova, Maria, Morino, Isamu, Nagahama, Tomoo, Notholt, Justus, Ortega, Ivan, Palm, Mathias, Poberovskii, Anatoly V, Sussmann, Ralf, Warneke, Thorsten

“…We present a multiyear time series of column abundances of carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) measured using Fourier-transform…”
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On the Radiative Impact of Biomass-Burning Aerosols in the Arctic: The August 2017 Case Study by Calì Quaglia, Filippo, Meloni, Daniela, Muscari, Giovanni, Di Iorio, Tatiana, Ciardini, Virginia, Pace, Giandomenico, Becagli, Silvia, Di Bernardino, Annalisa, Cacciani, Marco, Hannigan, James W., Ortega, Ivan, di Sarra, Alcide Giorgio

“…Boreal fires have increased during the last years and are projected to become more intense and frequent as a consequence of climate change. Wildfires produce a…”
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Global Scale Inversions from MOPITT CO and MODIS AOD by Gaubert, Benjamin, Edwards, David P., Anderson, Jeffrey L., Arellano, Avelino F., Barré, Jérôme, Buchholz, Rebecca R., Darras, Sabine, Emmons, Louisa K., Fillmore, David, Granier, Claire, Hannigan, James W., Ortega, Ivan, Raeder, Kevin, Soulié, Antonin, Tang, Wenfu, Worden, Helen M., Ziskin, Daniel

“…Top-down observational constraints on emissions flux estimates from satellite observations of chemical composition are subject to biases and errors stemming…”
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Validation of MOPITT carbon monoxide using ground-based Fourier transform infrared spectrometer data from NDACC by Buchholz, Rebecca R, Deeter, Merritt N, Worden, Helen M, Gille, John, Edwards, David P, Hannigan, James W, Jones, Nicholas B, Paton-Walsh, Clare, Griffith, David W. T, Smale, Dan, Robinson, John, Strong, Kimberly, Conway, Stephanie, Sussmann, Ralf, Hase, Frank, Blumenstock, Thomas, Mahieu, Emmanuel, Langerock, Bavo

“…The Measurements of Pollution in the Troposphere (MOPITT) satellite instrument provides the longest continuous dataset of carbon monoxide (CO) from space. We…”
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Global Atmospheric OCS Trend Analysis From 22 NDACC Stations by Hannigan, James W., Ortega, Ivan, Shams, Shima Bahramvash, Blumenstock, Thomas, Campbell, John Elliott, Conway, Stephanie, Flood, Victoria, Garcia, Omaira, Griffith, David, Grutter, Michel, Hase, Frank, Jeseck, Pascal, Jones, Nicholas, Mahieu, Emmanuel, Makarova, Maria, Mazière, Martine, Morino, Isamu, Murata, Isao, Nagahama, Toomo, Nakijima, Hideaki, Notholt, Justus, Palm, Mathias, Poberovskii, Anatoliy, Rettinger, Markus, Robinson, John, Röhling, Amelie N., Schneider, Matthias, Servais, Christian, Smale, Dan, Stremme, Wolfgang, Strong, Kimberly, Sussmann, Ralf, Te, Yao, Vigouroux, Corinne, Wizenberg, Tyler

“…Carbonyl sulfide (OCS) is a non‐hygroscopic trace species in the free troposphere and a large sulfur reservoir maintained by both direct oceanic, geologic,…”
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Unprecedented Atmospheric Ammonia Concentrations Detected in the High Arctic From the 2017 Canadian Wildfires by Lutsch, Erik, Strong, Kimberly, Jones, Dylan B. A., Ortega, Ivan, Hannigan, James W., Dammers, Enrico, Shephard, Mark W., Morris, Eleanor, Murphy, Killian, Evans, Mathew J., Parrington, Mark, Whitburn, Simon, Van Damme, Martin, Clarisse, Lieven, Coheur, Pierre‐Francois, Clerbaux, Cathy, Croft, Betty, Martin, Randall V., Pierce, Jeffrey R., Fisher, Jenny A.

“…From 17–22 August 2017 simultaneous enhancements of ammonia (NH3), carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) were detected from…”
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The Airborne Infrared Spectrometer: Development, Characterization, and the 2017 August 21 Eclipse Observation by Samra, Jenna E., Marquez, Vanessa, Cheimets, Peter, DeLuca, Edward E., Golub, Leon, Hannigan, James W., Madsen, Chad A., Vira, Alisha, Adams, Arn

“…Abstract On 2017 August 21, the Airborne Infrared Spectrometer (AIR-Spec) observed the total solar eclipse at an altitude of 14 km from aboard the NSF/NCAR…”
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Separation of Methane Emissions From Agricultural and Natural Gas Sources in the Colorado Front Range by Kille, Natalie, Chiu, Randall, Frey, Matthias, Hase, Frank, Sha, Mahesh K., Blumenstock, Thomas, Hannigan, James W., Orphal, Johannes, Bon, Daniel, Volkamer, Rainer

“…This proof‐of‐concept study demonstrates that methane (CH4) emissions from natural gas (NG) and agriculture can be disentangled using the concept of excess…”
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The temporal trend of stratospheric carbonyl sulfide by Coffey, M. T., Hannigan, James W.

“…Using a database of spectra collected with an airborne infrared spectrometer between 1978 and 2005, the longest record of this type, we have searched for a…”
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Retrievals of Ozone in the Troposphere and Lower Stratosphere Using FTIR Observations Over Greenland by Bahramvash Shams, Shima, Walden, Von P., Hannigan, James W., Turner, David D.

“…When retrieving geophysical parameters, it is advantageous to have an estimate of prior information that is based on observations with associated…”
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Analyzing ozone variations and uncertainties at high latitudes during sudden stratospheric warming events using MERRA-2 by Bahramvash Shams, Shima, Walden, Von P, Hannigan, James W, Randel, William J, Petropavlovskikh, Irina V, Butler, Amy H, de la Cámara, Alvaro

“…Stratospheric circulation is a critical part of the Arctic ozone cycle. Sudden stratospheric warming events (SSWs) manifest the strongest alteration of…”
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Initial validation of ozone measurements from the High Resolution Dynamics Limb Sounder by Nardi, Bruno, Gille, John C., Barnett, John J., Randall, Cora E., Harvey, V. Lynn, Waterfall, Alison, Reburn, W. Jolyon, Leblanc, Thierry, McGee, Tom J., Twigg, Laurence W., Thompson, Anne M., Godin-Beekmann, Sophie, Bernath, Peter F., Bojkov, Bojan R., Boone, Chris D., Cavanaugh, Charles, Coffey, Michael T., Craft, James, Craig, Cheryl, Dean, Vincil, Eden, Thomas D., Francis, Gene, Froidevaux, Lucien, Halvorson, Chris, Hannigan, James W., Hepplewhite, Christopher L., Kinnison, Douglas E., Khosravi, Rashid, Krinsky, Charlie, Lambert, Alyn, Lee, Hyunah, Loh, Joanne, Massie, Steven T., McDermid, I. Stuart, Packman, Daniel, Torpy, Brendan, Valverde-Canossa, Jessica, Walker, Kaley A., Whiteman, David N., Witte, Jacquelyn C., Young, Greg

“…Comparisons of the latest High Resolution Dynamics Limb Sounder (HIRDLS) ozone retrievals (v2.04.09) are made with ozonesondes, ground‐based lidars, airborne…”
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Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018 by Strahan, Susan E., Smale, Dan, Douglass, Anne R., Blumenstock, Thomas, Hannigan, James W., Hase, Frank, Jones, Nicholas B., Mahieu, Emmanuel, Notholt, Justus, Oman, Luke D., Ortega, Ivan, Palm, Mathias, Prignon, Maxime, Robinson, John, Schneider, Matthias, Sussmann, Ralf, Velazco, Voltaire A.

“…Total columns of the trace gases nitric acid (HNO3) and hydrogen chloride (HCl) are sensitive to variations in the lower stratospheric age of air, a quantity…”
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An evaluation of IASI-NH3 with ground-based Fourier transform infrared spectroscopy measurements by Toon, Geoffrey C, Hannigan, James W, Roy J Wichink Kruit, Pierre-F Coheur

“…Global distributions of atmospheric ammonia (NH3) measured with satellite instruments such as the Infrared Atmospheric Sounding Interferometer (IASI) contain…”
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Evaluating modelled tropospheric columns of CH4, CO, and O3 in the Arctic using ground-based Fourier transform infrared (FTIR) measurements by Flood, Victoria A, Strong, Kimberly, Whaley, Cynthia H, Walker, Kaley A, Blumenstock, Thomas, Hannigan, James W, Mellqvist, Johan, Notholt, Justus, Palm, Mathias, Röhling, Amelie N, Arnold, Stephen, Beagley, Stephen, Rong-You, Chien, Christensen, Jesper, Deushi, Makoto, Dobricic, Srdjan, Dong, Xinyi, Fu, Joshua S, Gauss, Michael, Gong, Wanmin, Langner, Joakim, Law, Kathy S, Marelle, Louis, Onishi, Tatsuo, Oshima, Naga, Plummer, David A, Pozzoli, Luca, Raut, Jean-Christophe, Thomas, Manu A, Tsyro, Svetlana, Turnock, Steven

“…This study evaluates tropospheric columns of methane, carbon monoxide, and ozone in the Arctic simulated by 11 models. The Arctic is warming at nearly 4 times…”
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Validation of the CrIS fast physical NH3 retrieval with ground-based FTIR by Dammers, Enrico, Shephard, Mark W, Palm, Mathias, Cady-Pereira, Karen, Capps, Shannon, Lutsch, Erik, Strong, Kim, Hannigan, James W, Ortega, Ivan, Toon, Geoffrey C, Stremme, Wolfgang, Grutter, Michel, Jones, Nicholas, Smale, Dan, Siemons, Jacob, Hrpcek, Kevin, Tremblay, Denis, Schaap, Martijn, Notholt, Justus, Erisman, Jan Willem

“…Presented here is the validation of the CrIS (Cross-track Infrared Sounder) fast physical NH3 retrieval (CFPR) column and profile measurements using…”
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