Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean

Tae Wook Kim, Geun Ha Park, Dongseon Kim, Kitack Lee, Richard A. Feely, Frank J Millero

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Seasonal variability of the aragonite saturation state (Ω<inf>AR</inf>) in the upper (50 m and 100 m depths) North Pacific Ocean (NPO) was investigated using multiple linear regression (MLR). The MLR algorithm derived from a high-quality carbon data set accurately predicted the Ω<inf>AR</inf> of evaluation data sets (three time series stations and P02 section) with acceptable uncertainty (<0.1 Ω<inf>AR</inf>). The algorithm was combined with seasonal climatology data, and the estimated Ω<inf>AR</inf> varied in the range of 0.4-0.6 in the midlatitude western NPO, with the largest variation found for the tropical eastern NPO. These marked variations were largely controlled by seasonal changes in vertical mixing and thermocline depth, both of which determine the degree of entrainment of CO<inf>2</inf>-rich corrosive waters from deeper depths. Our MLR-based subsurface Ω<inf>AR</inf> climatology is complementary to surface climatology based on pCO<inf>2</inf> measurements.

Original languageEnglish (US)
Pages (from-to)4498-4506
Number of pages9
JournalGeophysical Research Letters
Volume42
Issue number11
DOIs
StatePublished - Jun 16 2015

Fingerprint

aragonite
climatology
Pacific Ocean
upper ocean
annual variations
open ocean
regression analysis
oceans
seasonal variation
saturation
mixing height
water
thermoclines
temperate regions
entrainment
vertical mixing
thermocline
stations
time series
evaluation

Keywords

  • aragonite saturation state
  • fossil fuel CO2
  • mutiple linear regression
  • North Pacific Ocean
  • ocean acidification

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean. / Kim, Tae Wook; Park, Geun Ha; Kim, Dongseon; Lee, Kitack; Feely, Richard A.; Millero, Frank J.

In: Geophysical Research Letters, Vol. 42, No. 11, 16.06.2015, p. 4498-4506.

Research output: Contribution to journalArticle

Kim, Tae Wook ; Park, Geun Ha ; Kim, Dongseon ; Lee, Kitack ; Feely, Richard A. ; Millero, Frank J. / Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean. In: Geophysical Research Letters. 2015 ; Vol. 42, No. 11. pp. 4498-4506.
@article{b77d1f5046354d7bb1d42b7391d0875c,
title = "Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean",
abstract = "Seasonal variability of the aragonite saturation state (ΩAR) in the upper (50 m and 100 m depths) North Pacific Ocean (NPO) was investigated using multiple linear regression (MLR). The MLR algorithm derived from a high-quality carbon data set accurately predicted the ΩAR of evaluation data sets (three time series stations and P02 section) with acceptable uncertainty (<0.1 ΩAR). The algorithm was combined with seasonal climatology data, and the estimated ΩAR varied in the range of 0.4-0.6 in the midlatitude western NPO, with the largest variation found for the tropical eastern NPO. These marked variations were largely controlled by seasonal changes in vertical mixing and thermocline depth, both of which determine the degree of entrainment of CO2-rich corrosive waters from deeper depths. Our MLR-based subsurface ΩAR climatology is complementary to surface climatology based on pCO2 measurements.",
keywords = "aragonite saturation state, fossil fuel CO2, mutiple linear regression, North Pacific Ocean, ocean acidification",
author = "Kim, {Tae Wook} and Park, {Geun Ha} and Dongseon Kim and Kitack Lee and Feely, {Richard A.} and Millero, {Frank J}",
year = "2015",
month = "6",
day = "16",
doi = "10.1002/2015GL063602",
language = "English (US)",
volume = "42",
pages = "4498--4506",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "11",

}

TY - JOUR

T1 - Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean

AU - Kim, Tae Wook

AU - Park, Geun Ha

AU - Kim, Dongseon

AU - Lee, Kitack

AU - Feely, Richard A.

AU - Millero, Frank J

PY - 2015/6/16

Y1 - 2015/6/16

N2 - Seasonal variability of the aragonite saturation state (ΩAR) in the upper (50 m and 100 m depths) North Pacific Ocean (NPO) was investigated using multiple linear regression (MLR). The MLR algorithm derived from a high-quality carbon data set accurately predicted the ΩAR of evaluation data sets (three time series stations and P02 section) with acceptable uncertainty (<0.1 ΩAR). The algorithm was combined with seasonal climatology data, and the estimated ΩAR varied in the range of 0.4-0.6 in the midlatitude western NPO, with the largest variation found for the tropical eastern NPO. These marked variations were largely controlled by seasonal changes in vertical mixing and thermocline depth, both of which determine the degree of entrainment of CO2-rich corrosive waters from deeper depths. Our MLR-based subsurface ΩAR climatology is complementary to surface climatology based on pCO2 measurements.

AB - Seasonal variability of the aragonite saturation state (ΩAR) in the upper (50 m and 100 m depths) North Pacific Ocean (NPO) was investigated using multiple linear regression (MLR). The MLR algorithm derived from a high-quality carbon data set accurately predicted the ΩAR of evaluation data sets (three time series stations and P02 section) with acceptable uncertainty (<0.1 ΩAR). The algorithm was combined with seasonal climatology data, and the estimated ΩAR varied in the range of 0.4-0.6 in the midlatitude western NPO, with the largest variation found for the tropical eastern NPO. These marked variations were largely controlled by seasonal changes in vertical mixing and thermocline depth, both of which determine the degree of entrainment of CO2-rich corrosive waters from deeper depths. Our MLR-based subsurface ΩAR climatology is complementary to surface climatology based on pCO2 measurements.

KW - aragonite saturation state

KW - fossil fuel CO2

KW - mutiple linear regression

KW - North Pacific Ocean

KW - ocean acidification

UR - http://www.scopus.com/inward/record.url?scp=84934443382&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84934443382&partnerID=8YFLogxK

U2 - 10.1002/2015GL063602

DO - 10.1002/2015GL063602

M3 - Article

VL - 42

SP - 4498

EP - 4506

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 11

ER -