Diverging Fates of the Pacific Ocean Oxygen Minimum Zone and Its Core in a Warming World
Diverging Fates of the Pacific Ocean Oxygen Minimum Zone and Its Core in a Warming World
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变暖世界中太平洋最低氧气区及其核心的不同命运
DOI:
10.1029/2021av000470
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发表时间:
2022
期刊:
影响因子:
8.4
通讯作者:
John, Jasmin G.
中科院分区:
文献类型:
--
作者:
Busecke, Julius J.;Resplandy, Laure;Ditkovsky, Sam J.;John, Jasmin G.
Global ocean oxygen loss is projected to persist in the future, but Earth system models (ESMs) have not yet provided a consistent picture of how it will influence the largest oxygen minimum zone (OMZ) in the tropical Pacific. We examine the change in the Pacific OMZ volume in an ensemble of ESMs from the CMIP6 archive, considering a broad range of oxygen (O2) thresholds relevant to biogeochemical cycles and ecosystems (5–160 µmol/kg). Despite OMZ biases in the historical period of the simulations, the ESM ensemble projections consistently fall into three regimes across ESMs: an expansion of low oxygenated waters (+0.8 [0.6, 1.0] × 1016m3/century for O2≤ 120 µmol/kg, ESM median and interquartile range); a slight contraction of the OMZ core although more uncertain across ESMs (−0.1 [−0.5, 0.0] × 1016m3/century for O2≤ 20 µmol/kg); and at the transition from contraction to expansion regimes, a spatial redistribution but near‐zero change in the volume of hypoxic waters (0.0 [−0.3, +0.1] × 1016m3/century for O2≤ 60 µmol/kg). Changes in circulation and biology dictate the shift from expansion to contraction. Specifically, reduced subtropical ventilation controls the expansion of low oxygenated waters, while a combination of circulation and biological changes explains the contraction of the core (likely changes in mixing, reduced intermediate ventilation and oxygen demand). Increased model complexity (e.g., ecosystem dynamics and equatorial circulation) likely stabilize the OMZ response, suggesting that future changes might lie in the lower bound of current projections. The expansion of low oxygenated waters which delimit the optimum habitat of numerous marine species would severely impact ecosystems and ecosystem services.
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影响因子:
9.5
作者:
R. Séférian;S. Berthet;A. Yool;J. Palmiéri;L. Bopp;A. Tagliabue;L. Kwiatkowski;O. Aumont;J. Christian;J. Dunne;M. Gehlen;T. Ilyina;J. John;Hongmei Li;M. Long;Jessica Y. Luo;H. Nakano;A. Romanou;J. Schwinger;C. Stock;Yeray Santana-Falcón;Y. Takano;J. Tjiputra;H. Tsujino;Michio Watanabe;Tongwen Wu;Fanghua Wu;A. Yamamoto
通讯作者:
R. Séférian;S. Berthet;A. Yool;J. Palmiéri;L. Bopp;A. Tagliabue;L. Kwiatkowski;O. Aumont;J. Christian;J. Dunne;M. Gehlen;T. Ilyina;J. John;Hongmei Li;M. Long;Jessica Y. Luo;H. Nakano;A. Romanou;J. Schwinger;C. Stock;Yeray Santana-Falcón;Y. Takano;J. Tjiputra;H. Tsujino;Michio Watanabe;Tongwen Wu;Fanghua Wu;A. Yamamoto
影响因子:
4.9
作者:
A. Gnanadesikan;J. Dunne;J. John
通讯作者:
J. John
影响因子:
5.2
作者:
Buchanan P
通讯作者:
Buchanan P
影响因子:
4.6
作者:
Espinoza-Morriberón D;Echevin V;Gutiérrez D;Tam J;Graco M;Ledesma J;Colas F
通讯作者:
Colas F
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
M. Shigemitsu;A. Yamamoto;Akira Oka;Yasuhiro Yamanaka
通讯作者:
Yasuhiro Yamanaka