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Title: Tracking ocean heat uptake during the surface warming hiatus

Ocean heat uptake is observed to penetrate deep during the recent hiatus1,2,3 of global warming in the Atlantic and Southern Ocean. This has been suggested to indicate that the two regions are the driver of the surface warming hiatus4. We show that the deep heat penetration in the Atlantic and Southern Ocean is not unique to the hiatus but common to the past four decades including the 1970s-90s epoch of accelerated surface warming. Our analyses of a large ensemble simulation5 confirm the deep heat penetration in the Atlantic and Southern Ocean in ensemble members with or without surface warming hiatus in the early 21th century. During the past four decades, the global ocean heat content (OHC) of upper 1500m is dominated by a warming trend, and the depth of anthropogenic heat penetration merely reflects the depth of the mean meridional overturning circulation in the basin. Furthermore, the heat penetration depth is not a valid basis to infer the hiatus mechanism.
Authors:
 [1] ;  [1] ;  [2]
  1. Univ. of California, San Diego, La Jolla, CA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Report Number(s):
PNNL-SA-111949
Journal ID: ISSN 2041-1723; KP1703010
Grant/Contract Number:
AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; physical oceanography
OSTI Identifier:
1337247

Liu, Wei, Xie, Shang -Ping, and Lu, Jian. Tracking ocean heat uptake during the surface warming hiatus. United States: N. p., Web. doi:10.1038/ncomms10926.
Liu, Wei, Xie, Shang -Ping, & Lu, Jian. Tracking ocean heat uptake during the surface warming hiatus. United States. doi:10.1038/ncomms10926.
Liu, Wei, Xie, Shang -Ping, and Lu, Jian. 2016. "Tracking ocean heat uptake during the surface warming hiatus". United States. doi:10.1038/ncomms10926. https://www.osti.gov/servlets/purl/1337247.
@article{osti_1337247,
title = {Tracking ocean heat uptake during the surface warming hiatus},
author = {Liu, Wei and Xie, Shang -Ping and Lu, Jian},
abstractNote = {Ocean heat uptake is observed to penetrate deep during the recent hiatus1,2,3 of global warming in the Atlantic and Southern Ocean. This has been suggested to indicate that the two regions are the driver of the surface warming hiatus4. We show that the deep heat penetration in the Atlantic and Southern Ocean is not unique to the hiatus but common to the past four decades including the 1970s-90s epoch of accelerated surface warming. Our analyses of a large ensemble simulation5 confirm the deep heat penetration in the Atlantic and Southern Ocean in ensemble members with or without surface warming hiatus in the early 21th century. During the past four decades, the global ocean heat content (OHC) of upper 1500m is dominated by a warming trend, and the depth of anthropogenic heat penetration merely reflects the depth of the mean meridional overturning circulation in the basin. Furthermore, the heat penetration depth is not a valid basis to infer the hiatus mechanism.},
doi = {10.1038/ncomms10926},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {3}
}