Global-scale multidecadal variability missing in state-of-the-art climate models
Abstract
Reliability of future global warming projections depends on how well climate models reproduce the observed climate change over the twentieth century. In this regard, deviations of the model-simulated climate change from observations, such as a recent “pause” in global warming, have received considerable attention. Such decadal mismatches between model-simulated and observed climate trends are common throughout the twentieth century, and their causes are still poorly understood. Here we show that the discrepancies between the observed and simulated climate variability on decadal and longer timescale have a coherent structure suggestive of a pronounced Global Multidecadal Oscillation. Surface temperature anomalies associated with this variability originate in the North Atlantic and spread out to the Pacific and Southern oceans and Antarctica, with Arctic following suit in about 25–35 years. While climate models exhibit various levels of decadal climate variability and some regional similarities to observations, none of the model simulations considered match the observed signal in terms of its magnitude, spatial patterns and their sequential time development. These results highlight a substantial degree of uncertainty in our interpretation of the observed climate change using current generation of climate models.
- Authors:
-
- Univ. of Wisconsin, Milwaukee, WI (United States); Russian Academy of Sciences (RAS), Moscow (Russian Federation). P. P. Shirshov Inst. of Oceanology
- Univ. of Wisconsin, Milwaukee, WI (United States)
- Univ. of Wisconsin, Milwaukee, WI (United States); County College of Morris, Randolph, NJ (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1567550
- Resource Type:
- Accepted Manuscript
- Journal Name:
- npj Climate and Atmospheric Science
- Additional Journal Information:
- Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2397-3722
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Kravtsov, S., Grimm, C., and Gu, S. Global-scale multidecadal variability missing in state-of-the-art climate models. United States: N. p., 2018.
Web. doi:10.1038/s41612-018-0044-6.
Kravtsov, S., Grimm, C., & Gu, S. Global-scale multidecadal variability missing in state-of-the-art climate models. United States. https://doi.org/10.1038/s41612-018-0044-6
Kravtsov, S., Grimm, C., and Gu, S. Tue .
"Global-scale multidecadal variability missing in state-of-the-art climate models". United States. https://doi.org/10.1038/s41612-018-0044-6. https://www.osti.gov/servlets/purl/1567550.
@article{osti_1567550,
title = {Global-scale multidecadal variability missing in state-of-the-art climate models},
author = {Kravtsov, S. and Grimm, C. and Gu, S.},
abstractNote = {Reliability of future global warming projections depends on how well climate models reproduce the observed climate change over the twentieth century. In this regard, deviations of the model-simulated climate change from observations, such as a recent “pause” in global warming, have received considerable attention. Such decadal mismatches between model-simulated and observed climate trends are common throughout the twentieth century, and their causes are still poorly understood. Here we show that the discrepancies between the observed and simulated climate variability on decadal and longer timescale have a coherent structure suggestive of a pronounced Global Multidecadal Oscillation. Surface temperature anomalies associated with this variability originate in the North Atlantic and spread out to the Pacific and Southern oceans and Antarctica, with Arctic following suit in about 25–35 years. While climate models exhibit various levels of decadal climate variability and some regional similarities to observations, none of the model simulations considered match the observed signal in terms of its magnitude, spatial patterns and their sequential time development. These results highlight a substantial degree of uncertainty in our interpretation of the observed climate change using current generation of climate models.},
doi = {10.1038/s41612-018-0044-6},
journal = {npj Climate and Atmospheric Science},
number = 1,
volume = 1,
place = {United States},
year = {Tue Nov 20 00:00:00 EST 2018},
month = {Tue Nov 20 00:00:00 EST 2018}
}
Web of Science
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