Articles | Volume 14, issue 8
Development and technical paper
06 Aug 2021
Development and technical paper |  | 06 Aug 2021

Development of adjoint-based ocean state estimation for the Amundsen and Bellingshausen seas and ice shelf cavities using MITgcm–ECCO (66j)

Yoshihiro Nakayama, Dimitris Menemenlis, Ou Wang, Hong Zhang, Ian Fenty, and An T. Nguyen

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Cited articles

Arndt, J. E., H. W., Schenke, M., Jakobsson, F., Nitsche, G., Buys, B., Goleby, M., Rebesco, F., Bohoyo, J. K., Hong, J., Black, R., Greku, G., Udintsev, F., Barrios, W., Reynoso-Peralta, T., Morishita, R., and Wigley, R.: The International Bathymetric Chart of the Southern Ocean (IBCSO) Version 1.0 A new bathymetric compilation covering circum-Antarctic waters, Geophys. Res. Lett., 40, 3111–3117, 2013. a
Arrigo, K. R., van Dijken, G., and Long, M.: Coastal Southern Ocean: A strong anthropogenic CO2 sink, Geophys. Res. Lett., 35, L21602,, 2008. a
Assmann, K., Darelius, E., Wåhlin, A. K., Kim, T.-W., and Lee, S. H.: Warm Circumpolar Deep Water at the Western Getz Ice Shelf Front, Antarctica, Geophys. Res. Lett., 46, 870–878, 2019. a, b
Bigdeli, A., Nguyen, A. T., Pillar, H., Ocaña, V., and Heimbach, P.: Atmospheric Warming Drives Growth in Arctic Sea-Ice: A Key Role for Snow, Geophys. Res. Lett., 47, e2020GL090236,, 2020. a
Short summary
High ice shelf melting in the Amundsen Sea has attracted many observational campaigns in the past decade. One method to combine observations with numerical models is the adjoint method. After 20 iterations, the cost function, defined as a sum of the weighted model–data difference, is reduced by 65 % by adjusting initial conditions, atmospheric forcing, and vertical diffusivity. This study demonstrates adjoint-method optimization with explicit representation of ice shelf cavity circulation.