FN Archimer Export Format
PT J
TI Global and Full-depth Ocean Temperature Trends during the early 21           st          century from Argo and Repeat Hydrography
BT 
AF DESBRUYERES, Damien
   MCDONAGH, Elaine L.
   KING, Brian A.
   THIERRY, Virginie
AS 1:1;2:1;3:1;4:2;
FF 1:PDG-ODE-LOPS-OH;2:;3:;4:PDG-ODE-LOPS-OH;
C1 Natl Oceanography Ctr, Southampton, Hants, England.
   IFREMER, Brest, France.
C2 NOC, UK
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 4.661
TC 95
UR https://archimer.ifremer.fr/doc/00361/47213/47169.pdf
   https://archimer.ifremer.fr/doc/00361/47213/51825.pdf
LA English
DT Article
AB The early 21st century’s warming trend of the full-depth global ocean is calculated by combining the analysis of Argo (top 2000m) and repeat hydrography into a blended full-depth observing system. The surface-to-bottom temperature change over the last decade of sustained observation is equivalent to a heat uptake of 0.72 ± 0.09 W m−2 applied over the surface of the earth, 90% of it being found above 2000m depth. We decompose the temperature trend point-wise into changes in isopycnal depth (heave) and temperature changes along an isopycnal (spiciness) to describe the mechanisms controlling the variability. The heave component dominates the global heat content increase, with the largest trends found in the southern hemisphere’s extratropics (0 - 2000m) highlighting a volumetric increase of subtropical mode waters. Significant heave-related warming is also found in the deep North Atlantic and Southern Ocean (2000m - 4000m), reflecting a potential decrease in deep water mass renewal rates. The spiciness component shows its strongest contribution at intermediate levels (700m - 2000m), with striking localised warming signals in regions of intense vertical mixing (North Atlantic and Southern oceans). Finally, the agreement between the independent Argo and repeat hydrography temperature changes at 2000m provides an overall good confidence in the blended heat content evaluation on global and ocean scales, but also highlights basin scale discrepancies between the two independent estimates. Those mismatches are largest in those basins with the largest heave signature (Southern Ocean) and reflect both the temporal and spatial sparseness of the hydrography sampling.
PY 2017
PD MAR
SO Journal Of Climate
SN 0894-8755
PU Amer Meteorological Soc
VL 30
IS 6
UT 000395765900008
BP 1985
EP 1997
DI 10.1175/JCLI-D-16-0396.1
ID 47213
ER

EF