Papers that I enjoyed reading in February 2023

Zhang, R., Sun, S., Chen, Z., Yang, H., & Wu, L. (2023). Rapid 21st century weakening of the Agulhas current in a warming climate. Geophys. Res. Lett., 50, e2022GL102070.

The Agulhas current is projected to slow down and become shallower during the rest of the 21st century, partly in response to the slowdown of the Atlantic meridional overturning circulation

Park, J. H., Yeh, S. W., Kug, J. S. et al. (2023). Two regimes of inter-basin interactions between the Atlantic and Pacific Oceans on interannual timescales. npj Clim. Atmos. Sci., 6, 13.

In the Pacific-driven regime before the mid-1980s, El Niño in winter effectively drives warmer-than-normal tropical North Atlantic (TNA) in the following spring. Whereas in the Atlantic-driven regime after the mid-1980s, warmer-than-normal TNA drives La Nina in the following summer.

Park, J. Y., Schloesser, F., Timmermann, A. et al. (2023). Future sea-level projections with a coupled atmosphere-ocean-ice-sheet model. Nat. Commun., 14, 636.

Standalone ice-sheet simulations may overestimate the contributions of Greenland and Antarctic ice sheet melting to the future projection of global sea level rise

Chikamoto, M. O., DiNezio, P., & Lovenduski, N. (2023). Long-term slowdown of ocean carbon uptake by alkalinity dynamics. Geophys. Res. Lett., 50, e2022GL101954.

A positive ocean alkalinity-climate feedback loop is identified and discussed. It involves anthropogenic ocean warming, enhanced stratification, reduced upward transport of alkaline water from the deep ocean, reduced carbonate buffering at the surface, and enhanced CO2 accumulation in the atmosphere which in turn reinforces the ocean warming and stratification.

Knutson, T.R., Sirutis, J.J., Bender, M.A. et al. (2022). Dynamical downscaling projections of late twenty-first-century U.S. landfalling hurricane activity. Clim. Change, 171, 28.

Downscaling simulations of CMIP3 and CMIP5 consistently show an increase in the number of category 4-5 hurricanes landfalling to the US in the late 21st century.

Figure 1 in Zhang et al. (2023). A schematic of the Indian Ocean circulation and its changes. The background color represents changes in wind stress curl from 2006 to 2100 in CESM Large Ensemble. The red line denotes the cross-section for evaluating the Agulhas current volume transport. The green arrows represent the direction of time-mean circulation and the purple arrows represent the changes. The light purple arrows around the African continent indicate the pathway by which the AMOC affects the Agulhas current.

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