Investigation of spaceborne trace gas products over St Petersburg and Yekaterinburg, Russia, by using COllaborative Column Carbon Observing Network (COCCON) observations

Atmospheric Measurement Techniques

article

Qiansi Tu¹  Frank Hase¹  Maria V. Makarova³  Konstantin Gribanov⁴  Stefani C. Foka³  Vyacheslav Zakharov⁴  Thomas Blumenstock¹  Michael Buchwitz⁵  Christopher Diekmann¹  Benjamin Ertl⁶  Matthias M. Frey¹  Hamud Kh. Imhasin³  Dmitry V. Ionov³  Farahnaz Khosrawi¹  Sergey I. Osipov³  Maximilian Reuter⁵  Matthias Schneider¹  Carlos Alberti¹  Thorsten Warneke⁵ 

[1] Institute of Meteorology and Climate Research ,(IMK-ASF), Karlsruhe Institute of Technology;These authors contributed equally to this work.;Department of Atmospheric Physics, Faculty of Physics, Saint Petersburg State University;Institute of Natural Sciences and Mathematics, Ural Federal University;Institute of Environmental Physics, University of Bremen;Karlsruhe Institute of Technology, Steinbuch Centre for Computing;now at: National Institute for Environmental Studies

DOI  :  10.5194/amt-15-2199-2022

学科分类：内科医学

来源: Copernicus Publications

【 摘 要 】

This work employs ground- and space-based observations, togetherwith model data, to study columnar abundances of atmospheric trace gases( XH 2 O , XCO 2 , XCH 4 and XCO ) in two high-latitude Russian cities, St. Petersburg and Yekaterinburg. Two portable COllaborative ColumnCarbon Observing Network (COCCON) spectrometers were used for continuousmeasurements at these locations during 2019 and 2020. Additionally, a subset of data of special interest (a strong gradient in XCH 4 and XCO was detected) collected in the framework of a mobile city campaign performed in 2019 using both instruments is investigated. All studied satellite products (TROPOMI, OCO-2, GOSAT, MUSICA IASI) show generally good agreement with COCCON observations. Satellite and ground-based observations at high latitudes are much sparser than at low or mid latitudes, which makes directcoincident comparisons between remote-sensing observations more difficult.Therefore, a method of scaling continuous Copernicus AtmosphereMonitoring Service (CAMS) model data to theground-based observations is developed and used for creating virtual COCCONobservations. These adjusted CAMS data are then used for satellitevalidation, showing good agreement in both Peterhof and Yekaterinburg. The gradients between the two study sites ( Δ Xgas) aresimilar between CAMS and CAMS-COCCON datasets, indicating that the modelgradients are in agreement with the gradients observed by COCCON. This isfurther supported by a few simultaneous COCCON and satellite Δ Xgasmeasurements, which also agree with the model gradient. With respect to thecity campaign observations recorded in St Petersburg, the downwind COCCONstation measured obvious enhancements for both XCH 4 (10.6 ppb) and XCO (9.5 ppb), which is nicely reflected by TROPOMI observations, which detect city-scale gradients of the order 9.4 ppb for XCH 4 and 12.5 ppb for XCO .

【 授权许可】

CC BY