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arXiv:2309.13862 (physics)
[Submitted on 25 Sep 2023]

Title:Anthropogenic contributions to slow warming over 1998-2012

Authors:Xuanming Su, Hideo Shiogama, Katsumasa Tanaka, Kaoru Tachiiri, Tomohiro Hajima, Michio Watanabe, Michio Kawamiya, Kiyoshi Takahashi, Tokuta Yokohata
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Abstract:The observed global mean surface temperature increase from 1998 to 2012 was slower than that since 1951. The relative contributions of all relevant factors including climate forcers, however, have not been comprehensively analyzed. Using a reduced-complexity climate model and an observationally constrained statistical model, we find that La Nina cooling and a descending solar cycle contributed approximately 50% and 26% of the total warming slowdown during 1998-2012 compared to 1951-2012. Furthermore, reduced ozone-depleting substances and methane accounted for roughly a quarter of the total warming slowdown, which can be explained by changes in atmospheric concentrations. We identify that human factors played an important role in slowing global warming during 1998-2012, shedding light on the evidence for controlling global warming by reducing greenhouse gas emissions.
Comments: 55 pages, 26 figures, 4 tables
Subjects: Atmospheric and Oceanic Physics (physics.ao-ph); Geophysics (physics.geo-ph)
Cite as: arXiv:2309.13862 [physics.ao-ph]
  (or arXiv:2309.13862v1 [physics.ao-ph] for this version)
  https://doi.org/10.48550/arXiv.2309.13862

Submission history

From: Xuanming Su [view email]
[v1] Mon, 25 Sep 2023 04:14:44 UTC (743 KB)
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