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    Academic Journals

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• Spaceborne tropospheric nitrogen dioxide (NO.sub.2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers.

  Authors:Hao Yin, Youwen Sun, Justus Notholt, Mathias Palm, and Cheng LiuFrom:Atmospheric Chemistry and Physics (Vol. 22, Issue 6) Peer-Reviewed

  Mar. 31, 2022404 words Brief article Nitrogen dioxide (NO.sub.2) is mainly affected by local emission and meteorology rather than long-range transport. Accurate knowledge of its long-term variabilities and drivers is significant for understanding the...

• An 11-year record of XCO.sub.2 estimates derived from GOSAT measurements using the NASA ACOS version 9 retrieval algorithm.

  Authors:Thomas E. Taylor, Christopher W. O'Dell, David Crisp, Akhiko Kuze, Hannakaisa Lindqvist, Paul O. Wennberg, et al.From:Earth System Science Data (Vol. 14, Issue 1) Peer-Reviewed

  Jan. 31, 2022513 words Article The Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer (TANSO-FTS) on the Japanese Greenhouse gases Observing SATellite (GOSAT) has been returning data since April 2009. The version...

• The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020.

  Authors:Youwen Sun, Hao Yin, Xiao Lu, Justus Notholt, Mathias Palm, Cheng Liu, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 24) Peer-Reviewed

  Dec. 22, 2021356 words Brief article Following a continuous increase in the surface ozone (O.sub.3) level from 2013 to 2019, the overall summertime O.sub.3 concentrations across China showed a significant reduction in 2020. In contrast to this overall...

• Assessing the feasibility of using a neural network to filter Orbiting Carbon Observatory 2 (OCO-2) retrievals at northern high latitudes.

  Authors:Joseph Mendonca, Ray Nassar, Christopher W. O'Dell, Rigel Kivi, Isamu Morino, Justus Notholt, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 12) Peer-Reviewed

  Dec. 3, 2021265 words Brief article Satellite retrievals of XCO.sub.2 at northern high latitudes currently have sparser coverage and lower data quality than most other regions of the world. We use a neural network (NN) to filter Orbiting Carbon Observatory...

• Spatial distributions of X.sub.CO.sub.2 seasonal cycle amplitude and phase over northern high-latitude regions.

  Authors:Nicole Jacobs, William R. Simpson, Kelly A. Graham, Christopher Holmes, Frank Hase, Thomas Blumenstock, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 21) Peer-Reviewed

  Nov. 16, 2021479 words Article Satellite-based observations of atmospheric carbon dioxide (CO.sub.2) provide measurements in remote regions, such as the biologically sensitive but undersampled northern high latitudes, and are progressing toward true...

• Validation of methane and carbon monoxide from Sentinel-5 Precursor using TCCON and NDACC-IRWG stations.

  Authors:Mahesh Kumar Sha, Bavo Langerock, Jean-François L. Blavier, Thomas Blumenstock, Tobias Borsdorff, Matthias Buschmann, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 9) Peer-Reviewed

  Sept. 28, 2021356 words Brief article The Sentinel-5 Precursor (S5P) mission with the TROPOspheric Monitoring Instrument (TROPOMI) on board has been measuring solar radiation backscattered by the Earth's atmosphere and surface since its launch on 13 October...

• The reduction in C.sub.2H.sub.6 from 2015 to 2020 over Hefei, eastern China, points to air quality improvement in China.

  Authors:Youwen Sun, Hao Yin, Cheng Liu, Emmanuel Mahieu, Justus Notholt, Yao Té, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 15) Peer-Reviewed

  Aug. 6, 2021396 words Brief article Ethane (C.sub.2 H.sub.6) is an important greenhouse gas and plays a significant role in tropospheric chemistry and climate change. This study first presents and then quantifies the variability, sources, and transport of...

• A decade of GOSAT Proxy satellite CH.sub.4 observations.

  Authors:Robert J. Parker, Alex Webb, Hartmut Boesch, Peter Somkuti, Rocio Barrio Guillo, Antonio Di Noia, et al.From:Earth System Science Data (Vol. 12, Issue 4) Peer-Reviewed

  Dec. 14, 2020508 words Article This work presents the latest release (v9.0) of the University of Leicester GOSAT Proxy XCH.sub.4 dataset. Since the launch of the GOSAT satellite in 2009, these data have been produced by the UK National Centre for...

• Study of the footprints of short-term variation in XCO.sub.2 observed by TCCON sites using NIES and FLEXPART atmospheric transport models

  Authors:Dmitry A. Belikov, Shamil Maksyutov, Alexander Ganshin, Ruslan Zhuravlev, Nicholas M. Deutscher, Debra Wunch, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 1) Peer-Reviewed

  Jan. 3, 2017317 words Author abstract, Bri... The Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier transform spectrometers (FTSs) that record near-infrared (NIR) spectra of the sun. From these spectra, accurate and precise...

• Contributions of the troposphere and stratosphere to CH.sub.4 model biases

  Authors:Zhiting Wang, Thorsten Warneke, Nicholas M. Deutscher, Justus Notholt, Ute Karstens, Marielle Saunois, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 21) Peer-Reviewed

  Nov. 9, 2017333 words Brief article Inverse modelling is a useful tool for retrieving CH.sub.4 fluxes; however, evaluation of the applied chemical transport model is an important step before using the inverted emissions. For inversions using column data...

• NDACC harmonized formaldehyde time series from 21 FTIR stations covering a wide range of column abundances

  Authors:Corinne Vigouroux, Carlos Augusto Bauer Aquino, Maite Bauwens, Cornelis Becker, Thomas Blumenstock, Martine De Maziere, et al.From:Atmospheric Measurement Techniques (Vol. 11, Issue 9) Peer-Reviewed

  Sept. 6, 2018437 words Author abstract, Bri...

  Among the more than 20 ground-based FTIR (Fourier transform infrared) stations currently operating around the globe, only a few have provided formaldehyde (HCHO) total column time series until now. Although several...

• Atmospheric inverse modeling via sparse reconstruction

  Authors:Nils Hase, Scot M. Miller, Justus Notholt, Mathias Palm, and Thorsten WarnekeFrom:Geoscientific Model Development (Vol. 10, Issue 10) Peer-Reviewed

  Oct. 10, 2017256 words Author abstract, Bri... Many applications in atmospheric science involve ill-posed inverse problems. A crucial component of many inverse problems is the proper formulation of a priori knowledge about the unknown parameters. In most cases, this...

• Solar absorption measurements of stratospheric OH in the UV with a Fourier-transform spectrometer

  Authors:Justus Notholt, Hauke Schutt, and Axel KeensFrom:Applied Optics (Vol. 36, Issue 24) Peer-Reviewed

  Aug. 20, 1997202 words Article

   Abstract Only

• Quantifying variability, source, and transport of CO in the urban areas over the Himalayas and Tibetan Plateau.

  Authors:Youwen Sun, Hao Yin, Yuan Cheng, Qianggong Zhang, Bo Zheng, Justus Notholt, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 11) Peer-Reviewed

  June 16, 2021523 words Article Atmospheric pollutants over the Himalayas and Tibetan Plateau (HTP) have potential implications for accelerating the melting of glaciers, damaging air quality, water sources and grasslands, and threatening climate on...

• Detection and attribution of wildfire pollution in the Arctic and northern midlatitudes using a network of Fourier-transform infrared spectrometers and GEOS-Chem.

  Authors:Erik Lutsch, Kimberly Strong, Dylan B. A. Jones, Thomas Blumenstock, Stephanie Conway, Jenny A. Fisher, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 21) Peer-Reviewed

  Nov. 5, 2020428 words Article We present a multiyear time series of column abundances of carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C.sub.2 H.sub.6) measured using Fourier-transform infrared (FTIR) spectrometers at 10 sites affiliated...

• Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors

  Authors:Niall J. Ryan, Douglas E. Kinnison, Rolando R. Garcia, Christoph G. Hoffmann, Mathias Palm, Uwe Raffalski, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 3) Peer-Reviewed

  Feb. 2, 201852 words Brief article, Repor... Byline: Niall J. Ryan, Douglas E. Kinnison, Rolando R. Garcia, Christoph G. Hoffmann, Mathias Palm, Uwe Raffalski, Justus Notholt To access, purchase, authenticate, or subscribe to the full-text of this article,...

• The arctic seasonal cycle of total column CO.sub.2 and CH.sub.4 from ground-based solar and lunar FTIR absorption spectrometry

  Authors:Matthias Buschmann, Nicholas M. Deutscher, Mathias Palm, Thorsten Warneke, Christine Weinzierl, and Justus NotholtFrom:Atmospheric Measurement Techniques (Vol. 10, Issue 7) Peer-Reviewed

  July 5, 2017216 words Brief article, Repor... Solar absorption spectroscopy in the near infrared has been performed in Ny-Ã…lesund (78.9° N, 11.9° E) since 2002; however, due to the high latitude of the site, the sun is below the horizon from...

• Ensemble-based satellite-derived carbon dioxide and methane column-averaged dry-air mole fraction data sets (2003-2018) for carbon and climate applications

  Authors:Maximilian Reuter, Michael Buchwitz, Oliver Schneising, Stefan NoA'l, Heinrich Bovensmann, John P. Burrows, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 2) Peer-Reviewed

  Feb. 19, 2020456 words Brief article Satellite retrievals of column-averaged dry-air mole fractions of carbon dioxide (CO.sub.2) and methane (CH.sub.4 ), denoted XCO.sub.2 and XCH.sub.4, respectively, have been used in recent years to obtain information on...

• The influence of instrumental line shape degradation on NDACC gas retrievals: total column and profile

  Authors:Youwen Sun, Mathias Palm, Cheng Liu, Frank Hase, David Griffith, Christine Weinzierl, et al.From:Atmospheric Measurement Techniques (Vol. 11, Issue 5) Peer-Reviewed

  May 17, 2018380 words Author abstract, Bri... We simulated instrumental line shape (ILS) degradations with respect to typical types of misalignment, and compared their influence on each NDACC (Network for Detection of Atmospheric Composition Change) gas. The...

• Validation of the CrIS fast physical NH.sub.3 retrieval with ground-based FTIR

  Authors:Enrico Dammers, Mark W. Shephard, Mathias Palm, Karen Cady-Pereira, Shannon Capps, Erik Lutsch, et al.From:Atmospheric Measurement Techniques (Vol. 10, Issue 7) Peer-Reviewed

  July 25, 2017358 words Author abstract, Bri... Presented here is the validation of the CrIS (Cross-track Infrared Sounder) fast physical NH.sub.3 retrieval (CFPR) column and profile measurements using ground-based Fourier transform infrared (FTIR)...