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Joshi, Manoj 
ORCID: https://orcid.org/0000-0002-2948-2811, Hall, Robert A. ORCID: https://orcid.org/0000-0002-3665-6322, Stevens, David P. ORCID: https://orcid.org/0000-0002-7283-4405 and Hawkins, Ed
(2023)
The modelled climatic response to the 18.6-year lunar nodal cycle and its role in decadal temperature trends.
Earth System Dynamics, 14 (2).
443–455.
ISSN 2190-4979
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Abstract
The 18.6-year lunar nodal cycle arises from variations in the angle of the Moon’s orbital plane. Previous work has linked the nodal cycle to climate but has been limited, either by the length of observations analysed, or geographical regions considered in model simulations of the pre-industrial period. Here we examine the global effect of the lunar nodal cycle in multi-centennial climate model simulations of the pre-industrial period. We find cyclic signals in global and regional surface air temperature having amplitudes of O (0.1 K), ocean heat uptake and ocean heat content. The timing of anomalies of global surface air temperature and heat uptake are consistent with the so-called slowdown in global warming in the first decade of the 21st century, also displaying warmer than average Arctic surface temperatures at the same time. The lunar nodal cycle causes variations in mean sea level pressure exceeding 0.5 hPa in the Nordic seas region, thus affecting the North Atlantic Oscillation Index during boreal winter. Our results suggest that the contribution of the lunar nodal cycle to global temperature should be negative in the mid-2020s before becoming positive again in the early-2030s, reducing the uncertainty in time at which projected global temperature reaches 1.5C above pre-industrial levels.
| Item Type: | Article |
|---|---|
| Additional Information: | Data sets: Lunar nodal cycle forcing data, M. Joshi, R. Hall, D. Stevens, E. Hawkins, https://research-portal.uea.ac.uk/en/datasets/lunar-nodal-cycle-amplitude-modulation-map Financial support: This research has been supported by the UK Natural Environment Research Council (grant no. NE/N006348/1). |
| Uncontrolled Keywords: | sdg 13 - climate action ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences University of East Anglia > Theme - ClimateUEA Faculty of Science > School of Mathematics |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 03 Apr 2023 16:30 |
| Last Modified: | 18 Apr 2023 11:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/91716 |
| DOI: | 10.5194/egusphere-2022-151 |
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