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Local and regional enhancements of CH4 , CO, and CO2 inferred from TCCON column measurements

Mottungan, Kavitha; Roychoudhury, Chayan; Brocchi, Vanessa; Gaubert, Benjamin; Tang, Wenfu; Mirrezaei, Mohammad Amin; McKinnon, John; Guo, Yafang; Griffith, David W. T.; Feist, Dietrich G.; Morino, Isamu; Sha, Mahesh K.; Dubey, Manvendra K.; Mazière, Martine De; Deutscher, Nicholas M.; Wennberg, Paul O.; Sussmann, Ralf 1; Kivi, Rigel; Goo, Tae-Young; ... mehr

Abstract:

In this study, we demonstrate the utility of available correlative measurements of carbon species to identify regional and local air mass characteristics as well as their associated source types. In particular, we combine different regression techniques and enhancement ratio algorithms with carbon monoxide (CO), carbon dioxide (CO2), and methane (CH4) total column abundance from 11 sites of the Total Carbon Column Observing Network (TCCON) to infer relative contributions of regional and local sources to each of these sites. The enhancement ratios provide a viable alternative to univariate measures of relationships between the trace gases that are insufficient in capturing source-type and transport signatures. Regional enhancements are estimated from the difference between bivariate regressions across a specific time window of observed total abundance of these species (BERr for bulk enhancement regression ratio) and inferred anomalies (AERr for anomaly enhancement regression ratio) associated with a site-specific background. Since BERr and AERr represent the bulk and local species enhancement ratio, respectively, its difference simply represents the site-specific regional component of these ratios. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 07.10.2024
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000176396
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 17
Heft 19
Seiten 5861 – 5885
Nachgewiesen in OpenAlex
Scopus
Web of Science
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere EnergieZiel 13 – Maßnahmen zum Klimaschutz

Verlagsausgabe §
DOI: 10.5445/IR/1000176396
Veröffentlicht am 19.11.2024
Seitenaufrufe: 24
seit 19.11.2024
Downloads: 9
seit 11.12.2024
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