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Spiraling pathways of global deep waters to the surface of the Southern Ocean

Journal Article · · Nature Communications
 [1];  [2];  [3];  [1];  [4];  [4];  [5];  [1];  [4];  [6];  [7]
  1. Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
  2. Princeton Univ., NJ (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Woods Hole Oceanographic Inst. Joint Program in Oceanography, Cambridge, MA (United States)
  3. Princeton Univ., NJ (United States); Australian National Univ., Canberra, ACT (Australia)
  4. Princeton Univ., NJ (United States)
  5. Geophysical Fluid Dynamics Lab., Princeton, NJ (United States)
  6. California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Jet Propulsion Lab.
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Upwelling of global deep waters to the sea surface in the Southern Ocean closes the global overturning circulation and is fundamentally important for oceanic uptake of carbon and heat, nutrient resupply for sustaining oceanic biological production, and the melt rate of ice shelves. However, the exact pathways and role of topography in Southern Ocean upwelling remain largely unknown. Here in this paper we show detailed upwelling pathways in three dimensions, using hydrographic observations and particle tracking in high-resolution models. The analysis reveals that the northern-sourced deep waters enter the Antarctic Circumpolar Current via southward flow along the boundaries of the three ocean basins, before spiraling southeastward and upward through the Antarctic Circumpolar Current. Upwelling is greatly enhanced at five major topographic features, associated with vigorous mesoscale eddy activity. Deep water reaches the upper ocean predominantly south of the Antarctic Circumpolar Current, with a spatially nonuniform distribution. The timescale for half of the deep water to upwell from 30° S to the mixed layer is ~60–90 years.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautic and Space Administration (NASA); National Science Foundation (NSF); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1463556
Report Number(s):
LA-UR--18-21357
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (20)

Hydrothermal vents trigger massive phytoplankton blooms in the Southern Ocean journal June 2019
Kinetic energy of eddy-like features from sea surface altimetry text January 2019
Lagrangian Timescales of Southern Ocean Upwelling in a Hierarchy of Model Resolutions journal January 2018
Transformation of Deep Water Masses Along Lagrangian Upwelling Pathways in the Southern Ocean: SOUTHERN OCEAN UPWELLING TRANSFORMATION journal March 2018
Southern Ocean Biogeochemical Float Deployment Strategy, With Example From the Greenwich Meridian Line (GO‐SHIP A12) journal January 2019
Shallow Cross‐Equatorial Gyres of the Indian Ocean Driven by Seasonally Reversing Monsoon Winds journal December 2018
A Deep Eastern Boundary Current Carrying Indian Deep Water South of Australia journal March 2019
Meridional Heat and Salt Transport Across the Subantarctic Front by Cold‐Core Eddies journal February 2019
Southwest Pacific Vertical Structure Influences on Oceanic Carbon Storage Since the Last Glacial Maximum journal May 2019
The Antarctic Slope Current in a Changing Climate journal December 2018
Eddy Compensation Dampens Southern Ocean Sea Surface Temperature Response to Westerly Wind Trends journal April 2019
Observations of the Antarctic Circumpolar Current Over the Udintsev Fracture Zone, the Narrowest Choke Point in the Southern Ocean journal July 2019
Physical Drivers of Phytoplankton Bloom Initiation in the Southern Ocean's Scotia Sea journal August 2019
Water Mass and Biogeochemical Variability in the Kerguelen Sector of the Southern Ocean: A Machine Learning Approach for a Mixing Hot Spot journal March 2020
Kinetic Energy of Eddy‐Like Features From Sea Surface Altimetry journal October 2019
Global ocean heat transport dominated by heat export from the tropical Pacific journal April 2019
The global influence of localized dynamics in the Southern Ocean journal June 2018
Reframing the carbon cycle of the subpolar Southern Ocean journal August 2019
Mechanism of sea-ice expansion in the Indian Ocean sector of Antarctica: Insights from satellite observation and model reanalysis journal October 2018
MOMSO 1.0 – an eddying Southern Ocean model configuration with fairly equilibrated natural carbon journal January 2020

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