Impacto
Downloads
Downloads per month over past year
Ayargüena Porras, Blanca and Manzini, Elisa and Calvo Fernández, Natalia and Matei, Daniela (2021) Interaction between decadal-to-multidecadal oceanic variability and sudden stratospheric warmings. Annals of the New York Academy of Sciences . ISSN 0077-8923
Preview |
PDF
Creative Commons Attribution Non-commercial No Derivatives. 6MB |
Official URL: http://dx.doi.org/10.1111/nyas.14663
Abstract
Major sudden stratospheric warmings (SSWs) are the most important phenomena of the wintertime boreal stratospheric variability.During SSWs, the polar temperature increases abruptly, and easterlies prevail in the stratosphere. Their effects extend farther from the polar stratosphere, affecting near-surface circulation. According to observations, SSWs are not equally distributed in time, with decades experiencing very few events, while others experiencing SSWs almost every winter. Some sources of this SSW multidecadal variability can be traced back to sea surface temperature changes.Here, we investigate the effects of Pacific decadal variability (PDV) and Atlanticmultidecadal variability (AMV) on SSWs. We use for the first time a large ensemble of historical experiments to examine the modulation of the frequency, tropospheric precursors, and impact of SSWs by the PDV and AMV.We find a strong impact of the PDV on the occurrence of SSWs, with a higher SSW frequency for the positive phase of the PDV. This PDV influence ismediated by constructive interference of PDV anomalies with tropospheric stationary waves. The main effect of AMV is, instead, a modulation of the tropospheric response to SSWs, a finding that can be useful for predicting the tropospheric fingerprint of SSWs.
Item Type: | Article |
---|---|
Additional Information: | CRUE-CSIC (Acuerdos Transformativos 2021) © 2021 The Authors. B.A. and N.C. were supported by the Spanish Ministry of Science, Innovation and Universities |
Uncontrolled Keywords: | Sea-ice loss; Atmospheric response; Arctic amplification; CMIP5 simulations; Atlantic; Frequency; Climatology; Oscillation; Modulaton; Mechanisms |
Subjects: | Sciences > Physics > Atmospheric physics |
ID Code: | 67701 |
Deposited On: | 20 Sep 2021 07:15 |
Last Modified: | 18 Feb 2022 13:01 |
Origin of downloads
Repository Staff Only: item control page