of 6
GEOPHYSICAL RESEARCH LETTERS
Supporting Information for ‘Enhanced ventilation in
energetic regions of the Antarctic Circumpolar
Current’
Lilian A. Dove
1
, Dhruv Balwada
2
, Andrew F. Thompson
1
, Alison R. Gray
3
1
Division of Geological and Planetary Sciences, Environmental Science and Engineering, California Institute of Technology,
Pasadena, CA, USA
2
Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
3
School of Oceanography, University of Washington, Seattle, WA, USA
Contents of this file
1. Figures S1 to S5
June 13, 2022, 7:34pm
X - 2
:
Figure S1.
Histogram of the number of profiles by eddy kinetic energy (EKE, cm
2
s
1
) in the
defined Antarctic Circumpolar Current. Black line represents the boundary of ”high” and ”low”
EKE used in this work.
June 13, 2022, 7:34pm
:
X - 3
(a)
(b)
(c)
Figure S2.
(a) AOU [
μ
mol kg
1
], (b) Potential density,
σ
0
, [kg m
3
], and (c) Vertical
stratification, N
2
, [s
2
], with depth from all float profiles used in this study. For all panels, blue
is high-EKE and orange is low-EKE. Solid lines are means while dashed lines are medians.
June 13, 2022, 7:34pm
X - 4
:
(a)
(b)
Figure S3.
(a) Base-10 logarithm of eddy kinetic energy [log
10
m
2
s
2
]. Black dotted lines
illustrate the definitions used for ACC boundaries in this study. (b) Median AOU [
μ
mol kg
1
on longitude plotted on potential density [kg m
3
].
June 13, 2022, 7:34pm
:
X - 5
(a)
(b)
(c)
(d)
Figure S4.
(a) Joint probability density function of all points on the 27.2 kg m
3
density
surface in depth and AOU for low-EKE (orange) and high-EKE (blue) regions. Dotted black line
represents the average mixed layer depth for both the high- and low-EKE regions and ∆AOU
= 2
μ
mol kg
1
, ∆z = 10 m. (b) Frequency histogram of depths of the 27.2 kg m
3
isopycnal
in the ACC. (c) Mean AOU [
μ
mol kg
1
] in depth of the 27.2 kg m
3
isopycnal in the ACC. (d)
Frequency histogram of AOUs of the 27.2 kg m
3
isopycnal in the ACC. In (b)-(d), high-EKE
regions are denoted in blue, low-EKE regions in orange.
June 13, 2022, 7:34pm
X - 6
:
(a)
(b)
(d)
(e)
Figure S5.
Joint probability density functions of month and (a) mixed layer depth [m] and
(b) maximum stratification [s
2
]. (c) and (d) Same as (a) and (b) but for the high-EKE regions.
June 13, 2022, 7:34pm