TY - JOUR
T1 - Basin-scale distribution of NH4 + and NO2 − in the Pacific Ocean
AU - Yasunaka, Sayaka
AU - Nojiri, Yukihiro
AU - Hashioka, Taketo
AU - Yoshikawa, Chisato
AU - Kodama, Taketoshi
AU - Nakaoka, Shin ichiro
AU - Chiba, Sanae
AU - Hashihama, Fuminori
AU - Wakita, Masahide
AU - Furuya, Ken
AU - Sasano, Daisuke
AU - Murata, Akihiko
AU - Uchida, Hiroshi
AU - Aoyama, Michio
N1 - Funding Information:
We thank the many people at each institute for measuring, arranging, and archiving nutrient concentration data. Data collected by JMA, JAMSTEC, CalCOFI, and PANGAEA are available online ( http://www.data.jma.go.jp/gmd/kaiyou/db/vessel_obs/data-report/html/ship/efile_NoS2_e.html ; http://www.godac.jamstec.go.jp/darwin/e ; http://new.data.calcofi.org/index.php ; http://www.pangaea.de/ ). The NIES, FRA, and U-Tokyo nutrient data are available from the authors upon request (nakaoka.shinichiro@nies.go.jp; takekodama@affrc.go.jp). This work was financially supported by a Grant-in-Aid for Scientific Research on Innovative Areas (JP24121007), and the Global Environment Research Account for National Institutes by the Ministry of Environment, Japan. We appreciate two anonymous reviewers for their useful comments on this paper.
Publisher Copyright:
© 2017, The Oceanographic Society of Japan and Springer Japan KK.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - We used more than 25,000 nutrient samples to elucidate for the first time basin-scale distributions and seasonal changes of surface ammonium (NH4 +) and nitrite (NO2 −) concentrations in the Pacific Ocean. The highest NH4 +, NO2 −, and nitrate (NO3 −) concentrations were observed north of 40°N, in the coastal upwelling region off the coast of Mexico, and in the Tasman Sea. NH4 + concentrations were elevated during May–October in the western subarctic North Pacific, May–December in the eastern subarctic North Pacific, and June–September in the subtropical South Pacific. NO2 − concentrations were highest in winter in both hemispheres. The seasonal cycle of NH4 + was synchronous with NO2 −, NO3 −, and satellite chlorophyll a concentrations in the western subtropical South Pacific, whereas it was synchronous with chlorophyll-a but out of phase with NO2 − and NO3 − in the subarctic regions.
AB - We used more than 25,000 nutrient samples to elucidate for the first time basin-scale distributions and seasonal changes of surface ammonium (NH4 +) and nitrite (NO2 −) concentrations in the Pacific Ocean. The highest NH4 +, NO2 −, and nitrate (NO3 −) concentrations were observed north of 40°N, in the coastal upwelling region off the coast of Mexico, and in the Tasman Sea. NH4 + concentrations were elevated during May–October in the western subarctic North Pacific, May–December in the eastern subarctic North Pacific, and June–September in the subtropical South Pacific. NO2 − concentrations were highest in winter in both hemispheres. The seasonal cycle of NH4 + was synchronous with NO2 −, NO3 −, and satellite chlorophyll a concentrations in the western subtropical South Pacific, whereas it was synchronous with chlorophyll-a but out of phase with NO2 − and NO3 − in the subarctic regions.
KW - Ammonium (NH )
KW - Nitrate (NO )
KW - Nitrite (NO )
KW - Pacific Ocean
KW - Satellite chlorophyll-a
KW - Ship-of-opportunity
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U2 - 10.1007/s10872-017-0433-1
DO - 10.1007/s10872-017-0433-1
M3 - Article
AN - SCOPUS:85020498524
SN - 0916-8370
VL - 74
SP - 1
EP - 11
JO - Journal of Oceanography
JF - Journal of Oceanography
IS - 1
ER -