The influence of Arctic Stratospheric Ozone variations on North Atlantic ocean currents.
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| Title: | The influence of Arctic Stratospheric Ozone variations on North Atlantic ocean currents. |
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| Authors: | TAO WANG1, WENSHOU TIAN1 wstian@lzu.edu.cn, HUA QIN1, HAO WU1, SONGJIE MAO1, HONGWEN LIU1, HONGYING TIAN1 |
| Source: | Journal of Climate. Jun2026, Vol. 39 Issue 11, p1-16. 16p. |
| Subjects: | Ocean currents, Atmospheric models, Ocean temperature, Ozone layer, Atmospheric layers, Arctic oscillation |
| Geographic Terms: | North Atlantic Ocean, Atlantic Ocean, Arctic regions |
| Abstract: | Using reanalysis and CESM experiments, this study investigates the effects of Arctic stratospheric ozone (ASO) on North Atlantic ocean currents, and compares them with those in the North Pacific. We found that the variation of North Atlantic surface ocean current is significantly related to the ASO in March. An increased ASO accompanies anomalous westward (southeastward) ocean current and the deceleration (acceleration) of ocean current in high-latitude (midlatitude) North Atlantic in the shallow layer in March, and vice versa. The increased ASO weakens Arctic stratospheric polar vortex via radiative process, which facilitates tropospheric negative Arctic Oscillation (AO–)-like circulation anomaly through stratosphere-troposphere coupling. The lower tropospheric wind changes associated with this AO– anomaly force the above ocean current anomalies in the North Atlantic via the friction of wind and the Coriolis force. These influences are reproduced by the CESM experiments forced by high and low ozone scenarios. We also compare the influence of ASO on the North Atlantic with that on the North Pacific. In the North Pacific, ASO-related zonal and meridional ocean current changes are both significant. The meridional ocean current change further contributes to Victoria mode-like sea surface temperature (SST) anomalies in the North Pacific by heat transport. By contrast, the ASO-related meridional (zonal) ocean current anomaly is small (large) in the North Atlantic, and the zonal ocean current is relatively inefficient in temperature advection. Consequently, the responses in North Atlantic SST to ASO are weak. Therefore, although both the North Pacific and the North Atlantic are located in the Northern Hemisphere, their responses to ASO are apparently different. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Using reanalysis and CESM experiments, this study investigates the effects of Arctic stratospheric ozone (ASO) on North Atlantic ocean currents, and compares them with those in the North Pacific. We found that the variation of North Atlantic surface ocean current is significantly related to the ASO in March. An increased ASO accompanies anomalous westward (southeastward) ocean current and the deceleration (acceleration) of ocean current in high-latitude (midlatitude) North Atlantic in the shallow layer in March, and vice versa. The increased ASO weakens Arctic stratospheric polar vortex via radiative process, which facilitates tropospheric negative Arctic Oscillation (AO–)-like circulation anomaly through stratosphere-troposphere coupling. The lower tropospheric wind changes associated with this AO– anomaly force the above ocean current anomalies in the North Atlantic via the friction of wind and the Coriolis force. These influences are reproduced by the CESM experiments forced by high and low ozone scenarios. We also compare the influence of ASO on the North Atlantic with that on the North Pacific. In the North Pacific, ASO-related zonal and meridional ocean current changes are both significant. The meridional ocean current change further contributes to Victoria mode-like sea surface temperature (SST) anomalies in the North Pacific by heat transport. By contrast, the ASO-related meridional (zonal) ocean current anomaly is small (large) in the North Atlantic, and the zonal ocean current is relatively inefficient in temperature advection. Consequently, the responses in North Atlantic SST to ASO are weak. Therefore, although both the North Pacific and the North Atlantic are located in the Northern Hemisphere, their responses to ASO are apparently different. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 08948755 |
| DOI: | 10.1175/JCLI-D-25-0587.1 |
