Hotspots and drivers of compound marine heatwaves and low net primary production extremes

Le Grix, Natacha; Zscheischler, Jakob; Rodgers, Keith B.; Yamaguchi, Ryohei; Frölicher, Thomas L.

doi:https://doi.org/10.5194/bg-19-5807-2022

Articles | Volume 19, issue 24

https://doi.org/10.5194/bg-19-5807-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-19-5807-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 24

Research article

|

16 Dec 2022

Research article |

| 16 Dec 2022

Hotspots and drivers of compound marine heatwaves and low net primary production extremes

Natacha Le Grix, Jakob Zscheischler, Keith B. Rodgers, Ryohei Yamaguchi, and Thomas L. Frölicher

Data sets

Data and code for "Hotspots and drivers of compound marine heatwave and low net primary production extremes" (1.0) N. Le Grix https://doi.org/10.5281/zenodo.7330443

NASA Ocean Biogeochemical Model assimilating satellite chlorophyll data global daily VR2017 G. Watson and C. Rousseaux https://doi.org/10.5067/PT6TXZKSHBW9

Daily High-Resolution-Blended Analyses for Sea Surface Temperature R. W. Reynolds, T. M. Smith, C. Liu, D. B. Chelton, K. S. Casey, and M. G. Schlax https://psl.noaa.gov/data/gridded/data.noaa.oisst.v2.highres.html

Photosynthetic rates derived from satellite-based chlorophyll concentration M. J. Behrenfeld and P. G. Falkowski https://doi.org/10.4319/lo.1997.42.1.0001

Carbon-based primary productivity modeling with vertically resolved photoacclimation T. Westberry, M. J. Behrenfeld, D. A. Siegel, and E. Boss https://doi.org/10.1029/2007GB003078

The CAFE model: A net production model for global ocean phytoplankton G. M. Silsbe, M. J. Behrenfeld, K. H. Halsey, A. J. Milligan, and T. K. Westberry https://doi.org/10.1002/2016GB005521

Model code and software

Data and code for "Hotspots and drivers of compound marine heatwave and low net primary production extremes" (1.0) N. Le Grix https://doi.org/10.5281/zenodo.7330443

Short summary

Compound events threaten marine ecosystems. Here, we investigate the potentially harmful combination of marine heatwaves with low phytoplankton productivity. Using satellite-based observations, we show that these compound events are frequent in the low latitudes. We then investigate the drivers of these compound events using Earth system models. The models share similar drivers in the low latitudes but disagree in the high latitudes due to divergent factors limiting phytoplankton production.