Search Results - "Crowell, Sean"

Improved retrievals of carbon dioxide from Orbiting Carbon Observatory-2 with the version 8 ACOS algorithm by O'Dell, Christopher W, Eldering, Annmarie, Wennberg, Paul O, Crisp, David, Gunson, Michael R, Fisher, Brendan, Frankenberg, Christian, Kiel, Matthäus, Lindqvist, Hannakaisa, Mandrake, Lukas, Merrelli, Aronne, Natraj, Vijay, Nelson, Robert R, Osterman, Gregory B, Payne, Vivienne H, Taylor, Thomas E, Wunch, Debra, Drouin, Brian J, Oyafuso, Fabiano, Chang, Albert, McDuffie, James, Smyth, Michael, Baker, David F, Basu, Sourish, Chevallier, Frédéric, Crowell, Sean M. R, Feng, Liang, Palmer, Paul I, Dubey, Mavendra, García, Omaira E, Griffith, David W. T, Hase, Frank, Iraci, Laura T, Kivi, Rigel, Morino, Isamu, Notholt, Justus, Ohyama, Hirofumi, Petri, Christof, Roehl, Coleen M, Sha, Mahesh K, Strong, Kimberly, Sussmann, Ralf, Te, Yao, Uchino, Osamu, Velazco, Voltaire A

“…Since September 2014, NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite has been taking measurements of reflected solar spectra and using them to infer…”
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Model structures amplify uncertainty in predicted soil carbon responses to climate change by Shi, Zheng, Crowell, Sean, Luo, Yiqi, Moore, Berrien

“…Large model uncertainty in projected future soil carbon (C) dynamics has been well documented. However, our understanding of the sources of this uncertainty is…”
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On the role of atmospheric model transport uncertainty in estimating the Chinese land carbon sink by Schuh, Andrew E., Byrne, Brendan, Jacobson, Andrew R., Crowell, Sean M. R., Deng, Feng, Baker, David F., Johnson, Matthew S., Philip, Sajeev, Weir, Brad

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The GeoCarb greenhouse gas retrieval algorithm: simulations and sensitivity to sources of uncertainty by McGarragh, Gregory R, O'Dell, Christopher W, Crowell, Sean M. R, Somkuti, Peter, Burgh, Eric B, Moore III, Berrien

“…The Geostationary Carbon Cycle Observatory (GeoCarb) was selected as NASA's second Earth Venture Mission (EVM-2). The scientific objectives of GeoCarb were to…”
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Quantifying the Impact of Atmospheric Transport Uncertainty on CO2 Surface Flux Estimates by Schuh, Andrew E., Jacobson, Andrew R., Basu, Sourish, Weir, Brad, Baker, David, Bowman, Kevin, Chevallier, Frédéric, Crowell, Sean, Davis, Kenneth J., Deng, Feng, Denning, Scott, Feng, Liang, Jones, Dylan, Liu, Junjie, Palmer, Paul I.

“…We show that transport differences between two commonly used global chemical transport models, GEOS‐Chem and TM5, lead to systematic space‐time differences in…”
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Atmospheric Variations in Summertime Column Integrated CO2 on Synoptic Scales Over the U.S by Wang, Qingyu, Crowell, Sean M. R., Pal, Sandip

“…Past studies have demonstrated that synoptically active weather systems play an important role in the spatial and temporal variations of atmospheric carbon…”
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The Potential of the Geostationary Carbon Cycle Observatory (GeoCarb) to Provide Multi-scale Constraints on the Carbon Cycle in the Americas by Moore III, Berrien, Crowell, Sean M. R., Rayner, Peter J., Kumer, Jack, O'Dell, Christopher W., O'Brien, Denis, Utembe, Steven, Polonsky, Igor, Schimel, David, Lemen, James

“…The second NASA Earth Venture Mission, Geostationary Carbon Cycle Observatory (GeoCarb), will provide measurements of atmospheric carbon dioxide (CO2), methane…”
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The 2015–2016 carbon cycle as seen from OCO-2 and the global in situ network by Crowell, Sean, Baker, David, Schuh, Andrew, Basu, Sourish, Jacobson, Andrew R., Chevallier, Frederic, Liu, Junjie, Deng, Feng, Feng, Liang, McKain, Kathryn, Chatterjee, Abhishek, Miller, John B., Stephens, Britton B., Eldering, Annmarie, Crisp, David, Schimel, David, Nassar, Ray, O'Dell, Christopher W., Oda, Tomohiro, Sweeney, Colm, Palmer, Paul I., Jones, Dylan B. A.

“…The Orbiting Carbon Observatory-2 has been on orbit since 2014, and its global coverage holds the potential to reveal new information about the carbon cycle…”
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A scanning strategy optimized for signal-to-noise ratio for the Geostationary Carbon Cycle Observatory (GeoCarb) instrument by Nivitanont, Jeffrey, Crowell, Sean M. R, Moore III, Berrien

“…The Geostationary Carbon Cycle Observatory (GeoCarb) will make measurements of greenhouse gases over the contiguous North and South American landmasses at…”
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Anomalous Net Biome Exchange Over Amazonian Rainforests Induced by the 2015/16 El Niño: Soil Dryness‐Shaped Spatial Pattern but Temperature‐dominated Total Flux by Wang, Jun, Zeng, Ning, Wang, Meirong, Jiang, Fei, Chevallier, Frédéric, Crowell, Sean, He, Wei, Johnson, Matthew S., Liu, Junjie, Liu, Zhiqiang, Miller, Scot M., Philip, Sajeev, Wang, Hengmao, Wu, Mousong, Ju, Weimin, Feng, Shuzhuang, Jia, Mengwei

“…The magnitude and spatial pattern of anomalous net biome exchange (NBE) induced by the 2015/16 El Niño over Amazonian rainforests remain uncertain. We here…”
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Terrestrial CO2 Fluxes, Concentrations, Sources and Budget in Northeast China: Observational and Modeling Studies by Li, Xiaolan, Hu, Xiao‐Ming, Cai, Changjie, Jia, Qingyu, Zhang, Yao, Liu, Jingmiao, Xue, Ming, Xu, Jianming, Wen, Rihong, Crowell, Sean M. R.

“…CO2 fluxes and concentrations are not well understood in Northeast China, where dominant land surface types are mixed forest and cropland. Here, we analyzed…”
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Evaluating Global Atmospheric Inversions of Terrestrial Net Ecosystem Exchange CO2 Over North America on Seasonal and Sub‐Continental Scales by Cui, Yu Yan, Zhang, Li, Jacobson, Andrew R., Johnson, Matthew S., Philip, Sajeev, Baker, David, Chevallier, Frederic, Schuh, Andrew E., Liu, Junjie, Crowell, Sean, Peiro, Hélène E., Deng, Feng, Basu, Sourish, Davis, Kenneth J.

“…Atmospheric inversion estimates of net ecosystem exchange (NEE) of CO2 are increasingly relevant to climate policy. We evaluated sub‐continental, seasonal…”
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Multisensor and Multimodel Monitoring and Investigation of a Wintertime Air Pollution Event Ahead of a Cold Front Over Eastern China by Hu, Xiao‐Ming, Hu, Jun, Gao, Lan, Cai, Changjie, Jiang, Yujun, Xue, Ming, Zhao, Tianliang, Crowell, Sean M. R.

“…Given the limitations in pollutant measurements (e.g., coverage, observation errors) and air quality model uncertainties (e.g., with parameterizations and…”
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Implementation of Improved Parameterization of Terrestrial Flux in WRF‐VPRM Improves the Simulation of Nighttime CO2 Peaks and a Daytime CO2 Band Ahead of a Cold Front by Hu, Xiao‐Ming, Gourdji, Sharon M., Davis, Kenneth J., Wang, Qingyu, Zhang, Yao, Xue, Ming, Feng, Sha, Moore, Berrien, Crowell, Sean M. R.

“…Enhanced CO2 mole fraction bands were often observed immediately ahead of cold front during the Atmospheric Carbon and Transport (ACT)‐America mission and…”
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Improved calibration procedures for the EM27/SUN spectrometers of the COllaborative Carbon Column Observing Network (COCCON) by Alberti, Carlos, Hase, Frank, Frey, Matthias, Dubravica, Darko, Blumenstock, Thomas, Dehn, Angelika, Castracane, Paolo, Surawicz, Gregor, Harig, Roland, Baier, Bianca C, Bès, Caroline, Bi, Jianrong, Boesch, Hartmut, Butz, André, Cai, Zhaonan, Chen, Jia, Crowell, Sean M, Deutscher, Nicholas M, Ene, Dragos, Franklin, Jonathan E, García, Omaira, Griffith, David, Grouiez, Bruno, Grutter, Michel, Hamdouni, Abdelhamid, Houweling, Sander, Humpage, Neil, Jacobs, Nicole, Jeong, Sujong, Joly, Lilian, Jones, Nicholas B, Jouglet, Denis, Kivi, Rigel, Kleinschek, Ralph, Lopez, Morgan, Medeiros, Diogo J, Morino, Isamu, Mostafavipak, Nasrin, Müller, Astrid, Ohyama, Hirofumi, Palmer, Paul I, Pathakoti, Mahesh, Pollard, David F, Raffalski, Uwe, Ramonet, Michel, Ramsay, Robbie, Sha, Mahesh Kumar, Shiomi, Kei, Simpson, William, Stremme, Wolfgang, Sun, Youwen, Tanimoto, Hiroshi, Té, Yao, Tsidu, Gizaw Mengistu, Velazco, Voltaire A, Vogel, Felix, Watanabe, Masataka, Wei, Chong, Wunch, Debra, Yamasoe, Marcia, Zhang, Lu, Orphal, Johannes

“…In this study, an extension on the previously reported status of the COllaborative Carbon Column Observing Network's (COCCON) calibration procedures…”
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Dynamical Downscaling of CO2 in 2016 Over the Contiguous United States Using WRF‐VPRM, a Weather‐Biosphere‐Online‐Coupled Model by Hu, Xiao‐Ming, Crowell, Sean, Wang, Qingyu, Zhang, Yao, Davis, Kenneth J., Xue, Ming, Xiao, Xiangming, Moore, Berrien, Wu, Xiaocui, Choi, Yonghoon, DiGangi, Joshua P.

“…Ecosystem function (particularly CO2 fluxes and the subsequent atmospheric transport), synoptic‐scale weather (e.g., midlatitude cyclones), and interactions…”
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On the Ability of Space- Based Passive and Active Remote Sensing Observations of CO2 to Detect Flux Perturbations to the Carbon Cycle by Crowell, Sean M. R., Kawa, S. Randolph, Browell, Edward V., Hammerling, Dorit M., Moore, Berrien, Schaefer, Kevin, Doney, Scott C.

“…Space-borne observations of CO2 are vital to gaining understanding of the carbon cycle in regions of the world that are difficult to measure directly, such as…”
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Multi‐Season Evaluation of CO2 Weather in OCO‐2 MIP Models by Zhang, Li, Davis, Kenneth J., Schuh, Andrew E., Jacobson, Andrew R., Pal, Sandip, Cui, Yu Yan, Baker, David, Crowell, Sean, Chevallier, Frederic, Remaud, Marine, Liu, Junjie, Weir, Brad, Philip, Sajeev, Johnson, Matthew S., Deng, Feng, Basu, Sourish

“…The ability of current global models to simulate the transport of CO2 by mid‐latitude, synoptic‐scale weather systems (i.e., CO2 weather) is important for…”
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Annual Maps of Forests in Australia from Analyses of Microwave and Optical Images with FAO Forest Definition by Qin, Yuanwei, Xiao, Xiangming, Wigneron, Jean-Pierre, Ciais, Philippe, Canadell, Josep G., Brandt, Martin, Li, Xiaojun, Fan, Lei, Wu, Xiaocui, Tang, Hao, Dubayah, Ralph, Doughty, Russell, Chang, Qing, Crowell, Sean, Zheng, Bo, Neal, Kevin, Celis, Jorge A., Moore, Berrien

“…The Australian governmental agencies reported a total of 149 million ha forest in the Food and Agriculture Organization of the United Nations (FAO) in 2010,…”
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Optimizing 4 years of CO.sub.2 biospheric fluxes from OCO-2 and in situ data in TM5: fire emissions from GFED and inferred from MOPITT CO data by Peiro, Hélène, Crowell, Sean, Moore III, Berrien

“…Column mixing ratio of carbon dioxide (CO.sub.2) data alone do not provide enough information for source attribution. Carbon monoxide (CO) is a product of…”
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