Geophysical Research Letters
 2014
DOI: 10.1002/2014gl061880
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Antarctic Circumpolar Current transport and barotropic transition at Macquarie Ridge

Stephen R. Rintoul
1
,
Serguei Sokolov
2
,
Michael Williams
3
et al.

Abstract: Theory and numerical simulations suggest that topographic interactions are central to the dynamics of the Antarctic Circumpolar Current (ACC), but few observations are available to test these ideas. We use direct velocity measurements, satellite altimetry, and an ocean state estimate to investigate the interaction of the ACC with the Macquarie Ridge. Satellite altimeter data show that the Subantarctic Front crosses the ridge through a gap immediately north of Macquarie Island. Yearlong current meter records re… Show more

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Cited by 38 publications

(43 citation statements)
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“…Furthermore, in a view of depth-integrated vorticity budget following Firing et al, (2016), the enhanced vertical velocity in the bottom (see in Figure 12f) is equivalent to large bottom pressure torque there, which can modulate the advection of vorticity perturbation (see Figure S5 in the Supporting Information S1). These results demonstrate the critical impacts of bottom topography on OPRs' evolutions, which is consistent with previous studies (e.g., Firing et al, 2016;Hughes, 2005;Rintoul et al, 2014).…”
Section: Summary and Discussionsupporting
confidence: 93%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…Furthermore, in a view of depth-integrated vorticity budget following Firing et al, (2016), the enhanced vertical velocity in the bottom (see in Figure 12f) is equivalent to large bottom pressure torque there, which can modulate the advection of vorticity perturbation (see Figure S5 in the Supporting Information S1). These results demonstrate the critical impacts of bottom topography on OPRs' evolutions, which is consistent with previous studies (e.g., Firing et al, 2016;Hughes, 2005;Rintoul et al, 2014).…”
Section: Summary and Discussionsupporting
confidence: 93%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…This compares with about 14% in the depth-independent component both south of Tasmania (Phillips & Rintoul 2000) and on the Subantarctic Slope (Stanton & Morris 2004). Transport in the SAF through the gaps in Macquarie Ridge is 52 Sv (Rintoul et al 2014), similar to the 48 to 68 Sv found on the Subantarctic Slope (Stanton & Morris 2004).…”
Section: Antarctic Circumpolar Currentsupporting
confidence: 74%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…Characteristically, the findings of Donohue et al (2016) resulted in the "nominal" value of the Drake Passage transport increasing from around 130 to about 170 Sv (Sv = 10 6 m 3 /s). Similar findings regarding the importance of bottom flows in the Southern Ocean were also made from satellite altimetry and output from the Southern Ocean State Estimate (Masich et al, 2015;Peña Molino et al, 2014;Rintoul et al, 2014). These findings argue that, although the focus has been for long centered around the thermal wind transport, the barotropic component of the flow may play an important role in setting up the ACC transport.…”
Section: 1029/2019gl084117supporting
confidence: 70%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
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