Anthropogenic Fingerprint Detectable in Upper Tropospheric Ozone Trends Retrieved from Satellite DOI Creative Commons
Xinyuan Yu, Arlene M. Fiore, Benjamin D. Santer

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(32), P. 14306 - 14317

Published: Aug. 2, 2024

Tropospheric ozone (O3) is a strong greenhouse gas, particularly in the upper troposphere (UT). Limited observations point to continuous increase UT O3 recent decades, but attribution of changes complicated by large internal climate variability. We show that anthropogenic signal ("fingerprint") patterns increases distinguishable from background noise The time-invariant fingerprint human-caused derived 16-member initial-condition ensemble performed with chemistry-climate model (CESM2-WACCM6). largest between 30°S and 40°N, especially near 30°N. In contrast, pattern mainly associated El Niño–Southern Oscillation (ENSO). can be discerned high confidence within only 13 years 2005 start OMI/MLS satellite record. Unlike fingerprint, lower tropospheric (LT) varies significantly over time space response large-scale precursor emissions, highest signal-to-noise ratios 40°N Asia Europe. Our analysis reveals significant human effect on Earth's atmospheric chemistry indicates promise for identifying fingerprints specific sources precursors.

Language: Английский

Anthropogenic Fingerprint Detectable in Upper Tropospheric Ozone Trends Retrieved from Satellite DOI Creative Commons
Xinyuan Yu, Arlene M. Fiore, Benjamin D. Santer

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(32), P. 14306 - 14317

Published: Aug. 2, 2024

Tropospheric ozone (O3) is a strong greenhouse gas, particularly in the upper troposphere (UT). Limited observations point to continuous increase UT O3 recent decades, but attribution of changes complicated by large internal climate variability. We show that anthropogenic signal ("fingerprint") patterns increases distinguishable from background noise The time-invariant fingerprint human-caused derived 16-member initial-condition ensemble performed with chemistry-climate model (CESM2-WACCM6). largest between 30°S and 40°N, especially near 30°N. In contrast, pattern mainly associated El Niño–Southern Oscillation (ENSO). can be discerned high confidence within only 13 years 2005 start OMI/MLS satellite record. Unlike fingerprint, lower tropospheric (LT) varies significantly over time space response large-scale precursor emissions, highest signal-to-noise ratios 40°N Asia Europe. Our analysis reveals significant human effect on Earth's atmospheric chemistry indicates promise for identifying fingerprints specific sources precursors.

Language: Английский

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