Evidences and drivers of ocean deoxygenation off Peru over recent past decades.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
13 10 2021
13 10 2021
Historique:
received:
19
04
2021
accepted:
30
09
2021
entrez:
14
10
2021
pubmed:
15
10
2021
medline:
15
10
2021
Statut:
epublish
Résumé
Deoxygenation is a major threat to the coastal ocean health as it impacts marine life and key biogeochemical cycles. Understanding its drivers is crucial in the thriving and highly exploited Peru upwelling system, where naturally low-oxygenated subsurface waters form the so-called oxygen minimum zone (OMZ), and a slight vertical shift in its upper limit may have a huge impact. Here we investigate the long-term deoxygenation trends in the upper part of the nearshore OMZ off Peru over the period 1970-2008. We use a unique set of dissolved oxygen in situ observations and several high-resolution regional dynamical-biogeochemical coupled model simulations. Both observation and model present a nearshore deoxygenation above 150 m depth, with a maximum trend of - 10 µmol kg
Identifiants
pubmed: 34645958
doi: 10.1038/s41598-021-99876-8
pii: 10.1038/s41598-021-99876-8
pmc: PMC8514543
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
20292Informations de copyright
© 2021. The Author(s).
Références
Helm, K. P., Bindoff, N. L. & Church, J. A. Observed decreases in oxygen content of the global ocean. Geophys. Res. Lett. 38, L23602 (2011).
doi: 10.1029/2011GL049513
Schmidtko, S., Stramma, L. & Visbeck, M. Decline in global oceanic oxygen content during the past five decades. Nature 542, 335–339 (2017).
pubmed: 28202958
doi: 10.1038/nature21399
Breitburg, D. et al. Declining oxygen in the global ocean and coastal waters. Science 359, 6371 (2018).
doi: 10.1126/science.aam7240
Oschlies, A., Brandt, P., Stramma, L. & Schmidtko, S. Drivers and mechanisms of ocean deoxygenation. Nat. Geosci. 11, 467–473 (2018).
doi: 10.1038/s41561-018-0152-2
Bopp, L. et al. Multiple stressors of ocean ecosystems in the 21st century: projections with CMIP5 models. Biogeosciences 10, 6225–6245 (2013).
doi: 10.5194/bg-10-6225-2013
Paulmier, A. & Ruiz-Pino, D. Oxygen minimum zones (OMZs) in the modern ocean. Prog. Oceanogr. 80(3–4), 113–128 (2009).
doi: 10.1016/j.pocean.2008.08.001
Chavez, F., Bertrand, A., Guevara-Carrasco, R., Soler, P. & Csirke, J. The northern Humboldt Current System: brief history, present status and a view towards the future. Prog. Oceanogr. 79, 95–105 (2008).
doi: 10.1016/j.pocean.2008.10.012
Fuenzalida, R., Schneider, W., Garcés-Vargas, J., Bravo, L. & Lange, C. Vertical and horizontal extension of the oxygen minimum zone in the eastern South Pacific Ocean. Deep Sea Res. Part II(56), 992–1003 (2009).
doi: 10.1016/j.dsr2.2008.11.001
Espinoza-Morriberón, D. et al. Oxygen variability during ENSO in the tropical South Eastern Pacific. Front. Mar. Sci. 5, 526 (2019).
doi: 10.3389/fmars.2018.00526
Graco, M. et al. The OMZ and nutrients features as a signature of interannual and low frequency variability off the Peruvian upwelling system. Biogeosciences 14, 4601–4617 (2017).
doi: 10.5194/bg-14-4601-2017
Luyten, J. R., Pedlosky, J. & Stommel, H. The ventilated thermocline. J. Phys. Oceanogr. 13, 292–309 (1983).
doi: 10.1175/1520-0485(1983)013<0292:TVT>2.0.CO;2
Czeschel, R. et al. Middepth circulation of the eastern tropical South Pacific and its link to the oxygen minimum zone. J. Geophys. Res. 116, C01015 (2011).
Vergara, O. et al. Seasonal variability of the oxygen minimum zone off Peru in a high-resolution regional coupled model. Biogeosciences 13, 4389–4410 (2016).
doi: 10.5194/bg-13-4389-2016
Montes, I. et al. High-resolution modeling of the Eastern Tropical Pacific oxygen minimum zone: Sensitivity to the tropical oceanic circulation. J. Geophys. Res. Oceans 119(8), 5515–5532 (2014).
doi: 10.1002/2014JC009858
Stramma, L. et al. Trends and decadal oscillations of oxygen and nutrients at 50 to 300 m depth in the equatorial and North Pacific. Biogeosciences 17, 813–831 (2020).
doi: 10.5194/bg-17-813-2020
Ito, T., Minobe, S., Long, M. C. & Deutsch, C. Upper ocean O2 trends: 1958–2015. Geophys. Res. Lett. 44, 4214–4223 (2017).
doi: 10.1002/2017GL073613
Bertrand, A. et al. Oxygen: A fundamental property regulating pelagic ecosystem structure in the coastal southeastern tropical Pacific. PLoS ONE 6(12), e29558 (2011).
pubmed: 22216315
pmcid: 3247266
doi: 10.1371/journal.pone.0029558
Henley, B. J. et al. A tripole index for the interdecadal Pacific oscillation. Clim. Dyn. 45, 3077–3090 (2015).
doi: 10.1007/s00382-015-2525-1
Cardich, J. et al. Multidecadal changes in marine subsurface oxygenation off central Peru during the last ca. 170 years. Front. Mar. Sci. 6, 270 (2019).
doi: 10.3389/fmars.2019.00270
Chaigneau, A. et al. Near-coastal circulation in the northern Humboldt Current System from shipboard ADCP data. J. Geophys. Res. 118, 1–16 (2013).
doi: 10.1002/jgrc.20328
Czeschel, R., Stramma, L., Weller, R. A. & Fischer, T. Circulation, eddies, oxygen, and nutrient changes in the Eastern Tropical South Pacific Ocean. Ocean Sci. 11, 455–470 (2015).
doi: 10.5194/os-11-455-2015
Montes, I., Colas, F., Capet, X. & Schneider, W. On the pathways of the equatorial subsurface currents in the eastern equatorial Pacific and their contributions to the Peru-Chile Undercurrent. J. Geophys. Res. Oceans 115, C9 (2010).
doi: 10.1029/2009JC005710
Montes, I., Schneider, W., Colas, F., Blanke, B. & Echevin, V. Subsurface connections in the eastern tropical Pacific during La Niña 1999–2001 and El Niño 2002–2003. J. Geophys. Res. Oceans 116, C12 (2011).
doi: 10.1029/2011JC007624
Deutsch, C. et al. Centennial changes in North Pacific anoxia linked to tropical trade winds. Science 345(6197), 665–668 (2014).
pubmed: 25104384
doi: 10.1126/science.1252332
Kalvelage, T. et al. Nitrogen cycling driven by organic matter export in the south Pacific oxygen minimum zone. Nat. Geosci. 6, 228–234 (2013).
doi: 10.1038/ngeo1739
Yang, S., Gruber, N., Long, M. C. & Vogt, M. ENSO driven variability of denitrification and suboxia in the Eastern Tropical Pacific ocean. Glob. Biogeochem. Cycles 31, 1470–1487 (2017).
doi: 10.1002/2016GB005596
Shigemitsu, M., Yamamoto, A., Oka, A. & Yamanaka, Y. One possible uncertainty in CMIP5 projections of low-oxygen water volume in the Eastern Tropical Pacific. Glob. Biogeochem. Cycles 31, 804–820 (2017).
doi: 10.1002/2016GB005447
Busecke, J. J. M., Resplandy, L. & Dunne, J. P. P. The Equatorial Undercurrent and the oxygen minimum zone in the Pacific. Geophys. Res. Lett. 46, 6716–6725 (2019).
doi: 10.1029/2019GL082692
Echevin, V. et al. Physical and biogeochemical impacts of RCP8.5 scenario in the Peru upwelling system. Biogeosciences 17, 3317–3341 (2020).
doi: 10.5194/bg-17-3317-2020
Duteil, O., Oschlies, A. & Böning, C. W. Pacific Decadal Oscillation and recent oxygen decline in the eastern tropical Pacific Ocean. Biogeosciences 15, 7111–7126 (2018).
doi: 10.5194/bg-15-7111-2018
McPhaden, M. J. & Zhang, D. Slowdown of the meridional overturning circulation in the upper Pacific Ocean. Nature 415(6872), 603–608 (2002).
pubmed: 11832936
doi: 10.1038/415603a
Drenkard, E. J. & Karnauskas, K. B. Strengthening of the Pacific Equatorial undercurrent in the SODA reanalysis: Mechanisms, ocean dynamics, and implications. J. Clim. 27, 2405–2416 (2014).
doi: 10.1175/JCLI-D-13-00359.1
Duteil, O., Böning, C. W. & Oschlies, A. Variability in subtropical-tropical cells drives oxygen levels in the tropical Pacific Ocean. Geophys. Res. Lett. 41, 8926–8934 (2014).
doi: 10.1002/2014GL061774
Czeschel, R., Stramma, L. & Johnson, G. C. Oxygen decreases and variability in the eastern equatorial Pacific. J. Geophys. Res. 117, C11019 (2012).
Cheresh, J. & Fiechter, J. Physical and biogeochemical drivers of alongshore pH and oxygen variability in the California Current System. Geophys. Res. Lett. 47, e2020GL089553 (2020).
doi: 10.1029/2020GL089553
Sohn, B. J., Yeh, S. W., Schmetz, J. & Song, H. J. Observational evidences of Walker circulation change over the last 30 years contrasting with GCM results. Clim. Dyn. 40, 1721–1732 (2013).
doi: 10.1007/s00382-012-1484-z
Pizarro-Koch, M. et al. Seasonal variability of the southern tip of the Oxygen Minimum Zone in the eastern South Pacific (30°–38°S): A modeling study. J. Geophys. Res. Oceans 124, 8574–8604 (2019).
doi: 10.1029/2019JC015201
Srain, B. et al. Interdecadal changes in intensity of the oxygen minimum zone off Concepción, Chile (∼36°S), over the last century. Biogeosciences 12, 6045–6058 (2015).
doi: 10.5194/bg-12-6045-2015
Bograd, S. J. et al. Oxygen declines and the shoaling of the hypoxic boundary in the California Current. Geophys. Res. Lett. 35, L12607 (2008).
doi: 10.1029/2008GL034185
Deutsch, C., Brix, H., Ito, T., Frenzel, H. & Thompson, L. Climate-forced variability of ocean hypoxia. Science 333(6040), 336–339 (2011).
pubmed: 21659566
doi: 10.1126/science.1202422
Brandt, P. et al. Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation. Nat. Geosci. 14, 278–282. https://doi.org/10.1038/s41561-021-00716-1 (2021).
doi: 10.1038/s41561-021-00716-1
Carrit, D. E. & Carpenter, J. H. Recommendation procedure for Winkler analyses of sea water for dissolved oxygen. J. Mar. Res. 24, 313–318 (1966).
Shchepetkin, A. F. & McWilliams, J. C. The regional oceanic modeling system: A split-explicit, free-surface, topography-following-coordinate ocean model. Ocean Model 9, 347–404 (2005).
doi: 10.1016/j.ocemod.2004.08.002
Aumont, O., Ethé, C., Tagliabue, A., Bopp, L. & Gehlen, M. PISCES-v2: An ocean biogeochemical model for carbon and ecosystem studies. Geosci. Model Dev. 8, 2465–2513 (2015).
doi: 10.5194/gmd-8-2465-2015
Espinoza-Morriberón, D. et al. Impacts of El Niño events on the Peruvian upwelling system productivity. J. Geophys. Res. Oceans 122, 5423–5444 (2017).
doi: 10.1002/2016JC012439
Key, R. M. et al. A global ocean carbon climatology: Results from Global Data Analysis Project (GLODAP). Glob. Biogeochem. Cycles 18, GB4031. https://doi.org/10.1029/2004GB002247 (2004).
doi: 10.1029/2004GB002247
Goubanova, K. et al. Statistical downscaling of sea-surface wind over the Peru–Chile upwelling region: diagnosing the impact of climate change from the IPSL-CM4 model. Clim. Dyn. 36, 1365–1378 (2011).
doi: 10.1007/s00382-010-0824-0
Cambon, G. et al. Assessing the impact of downscaled winds on a regional ocean model simulation of the Humboldt system. Ocean Model 65, 11–24 (2013).
doi: 10.1016/j.ocemod.2013.01.007