edu.ucar.opensky::articles:27425 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:08:58.746570 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7sj1qwh https://doi.org/10.5281/zenodo.11895904 https Related Dataset #1 Data and code for "Anthropogenic fingerprint detectable in upper tropospheric ozone trends retrieved from satellite" (Yu et al. 2024, ES&T) https://doi.org/10.5065/D6RX99HX https Related Service #1 Cheyenne: SGI ICE XA Cluster Anthropogenic fingerprint detectable in Upper Tropospheric ozone trends retrieved from satellite 2024-08-13T00:00:00Z publication https://n2t.org/ark:/85065/d7sj1qwh https://doi.org/10.1021/acs.est.4c01289 Yu, X. author Fiore, A. M. author Santer, B. D. author G. P. Correa author Lamarque, Jean-François author Ziemke, J. R. author Eastham, S. D. author Zhu, Q. author UCAR/NCAR - Library publisher Tropospheric ozone (O-3) is a strong greenhouse gas, particularly in the upper troposphere (UT). Limited observations point to a continuous increase in UT O3 in recent decades, but the attribution of UT O3 changes is complicated by large internal climate variability. We show that the anthropogenic signal ("fingerprint") in the patterns of UT O-3 increases is distinguishable from the background noise of internal variability. The time-invariant fingerprint of human-caused UT O-3 changes is derived from a 16-member initial-condition ensemble performed with a chemistry-climate model (CESM2-WACCM6). The fingerprint is largest between 30 degrees S and 40 degrees N, especially near 30 degrees N. In contrast, the noise pattern in UT O-3 is mainly associated with the El Nino-Southern Oscillation (ENSO). The UT O-3 fingerprint pattern can be discerned with high confidence within only 13 years of the 2005 start of the OMI/MLS satellite record. Unlike the UT O-3 fingerprint, the lower tropospheric (LT) O-3 fingerprint varies significantly over time and space in response to large-scale changes in anthropogenic precursor emissions, with the highest signal-to-noise ratios near 40 degrees N in Asia and Europe. Our analysis reveals a significant human effect on Earth's atmospheric chemistry in the UT and indicates promise for identifying fingerprints of specific sources of ozone precursors. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation