TY - JOUR
T1 - Simulating Water Residence Time in the Coastal Ocean
T2 - A Global Perspective
AU - Liu, Xiao
AU - Dunne, John P.
AU - Stock, Charles A.
AU - Harrison, Matthew J.
AU - Adcroft, Alistair
AU - Resplandy, Laure
N1 - Funding Information:
The observed surface salinity data are openly accessible from the World Ocean Database ( https://www.nodc.noaa.gov/OC5/WOD/pr_wod.html 1.gfdl.noaa.gov/users/Xiao.Liu/CRT_simulation/GFDL‐MOM6‐SIS2 ) . Model output used in the analyses is archived at NOAA GFDL (ftp://data /). We thank J. Y. Park, M. Lee, and J. John for helpful comments and suggestions on an earlier draft of this manuscript. This manuscript was prepared by X. Liu under award NA14OAR4320106 and the Marine Ecosystem Tipping Points Initiative Program from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the authors and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, or the U.S. Department of Commerce.
Funding Information:
The observed surface salinity data are openly accessible from the World Ocean Database (https://www.nodc.noaa.gov/OC5/WOD/pr_wod.html). Model output used in the analyses is archived at NOAA GFDL (ftp://data?1.gfdl.noaa.gov/users/Xiao.Liu/CRT_simulation/GFDL-MOM6-SIS2/). We thank J. Y. Park, M. Lee, and J. John for helpful comments and suggestions on an earlier draft of this manuscript. This manuscript was prepared by X. Liu under award NA14OAR4320106 and the Marine Ecosystem Tipping Points Initiative Program from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the authors and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, or the U.S. Department of Commerce.
Publisher Copyright:
©2019. The Author.
PY - 2019/12/16
Y1 - 2019/12/16
N2 - Exchanges between coastal and oceanic waters shape both coastal ecosystem processes and signatures that they impart on global biogeochemical cycles. The timescales of these exchanges, however, are poorly represented in current-generation, coarse-grid climate models. Here we provide a novel global perspective on coastal residence time (CRT) and its spatio-temporal variability using a new age tracer implemented in global ocean models. Simulated CRTs range widely from several days in narrow boundary currents to multiple years on broader shelves and in semi-enclosed seas, in agreement with available observations. Overall, CRT is better characterized in high-resolution models (1/8° and 1/4°) than in the coarser (1° and 1/2°) versions. This is in large part because coastal and open ocean grid cells are more directly connected in coarse models, prone to erroneous coastal flushing and an underestimated CRT. Additionally, we find that geometric enclosure of a coastal system places an important constraint on CRT.
AB - Exchanges between coastal and oceanic waters shape both coastal ecosystem processes and signatures that they impart on global biogeochemical cycles. The timescales of these exchanges, however, are poorly represented in current-generation, coarse-grid climate models. Here we provide a novel global perspective on coastal residence time (CRT) and its spatio-temporal variability using a new age tracer implemented in global ocean models. Simulated CRTs range widely from several days in narrow boundary currents to multiple years on broader shelves and in semi-enclosed seas, in agreement with available observations. Overall, CRT is better characterized in high-resolution models (1/8° and 1/4°) than in the coarser (1° and 1/2°) versions. This is in large part because coastal and open ocean grid cells are more directly connected in coarse models, prone to erroneous coastal flushing and an underestimated CRT. Additionally, we find that geometric enclosure of a coastal system places an important constraint on CRT.
KW - coast-ocean exchanges
KW - coastal geometry and processes
KW - global ocean models
KW - residence time
UR - http://www.scopus.com/inward/record.url?scp=85076222307&partnerID=8YFLogxK
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U2 - 10.1029/2019GL085097
DO - 10.1029/2019GL085097
M3 - Article
AN - SCOPUS:85076222307
SN - 0094-8276
VL - 46
SP - 13910
EP - 13919
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 23
ER -