Deep Argo Quantifies Bottom Water Warming Rates in the Southwest Pacific Basin

Johnson, Gregory C.; Purkey, Sarah G.; Zilberman, Nathalie V.; Roemmich, Dean

doi:10.1029/2018gl081685

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Deep Argo Quantifies Bottom Water Warming Rates in the Southwest Pacific Basin

2019
By Johnson, Gregory C. ; Purkey, Sarah G. ; Zilberman, Nathalie V. ; ...
Source: Geophysical Research Letters, 46(5), 2662-2669

[PDF-1.37 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Johnson, Gregory C. ; Purkey, Sarah G. ; Zilberman, Nathalie V. ; Roemmich, Dean

Johnson, Gregory C. ; Purkey, Sarah G. ; Zilberman, Nathalie V. ; Roemmich, Dean Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory)

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

Data reported from mid‐2014 to late 2018 by a regional pilot array of Deep Argo floats in the Southwest Pacific Basin are used to estimate regional temperature anomalies from a long‐term climatology as well as regional trends over the 4.4 years of float data as a function of pressure. The data show warm anomalies that increase with increasing pressure from effectively 0 near 2,000 dbar to over 10 (±1) m°C by 4,800 dbar, uncertainties estimated at 5–95%. The 4.4‐year trend estimate shows warming at an average rate of 3 (±1) m°C/year from 5,000 to 5,600 dbar, in the near‐homogeneous layer of cold, dense bottom water of Antarctic origin. These results suggest acceleration of previously reported long‐term warming trends in the abyssal waters in this region. They also demonstrate the ability of Deep Argo to quantify changes in the deep ocean in near real‐time over short periods with high accuracy.
Keywords:

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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 46(5), 2662-2669
DOI:

https://doi.org/10.1029/2018gl081685
ISSN:

0094-8276;1944-8007;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA15OAR4320071 ; Grant no. NA18OAR0110434

Grant no. NA15OAR4320071 ; Grant no. NA18OAR0110434 Less -
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Main Document Checksum:

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urn:sha256:8d39d4ac8dd5ec4228a7d1fab2b19f7052e3bd69dd50259616e625a27aaa066f
Download URL:

https://repository.library.noaa.gov/view/noaa/59706/noaa_59706_DS1.pdf
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