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Low cloud-SST variability over the subtropical northeast Pacific

Internal variations of the Earth's energy imbalance

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Previous works

Interactions of the subtropical high and low clouds over the south Indian Ocean

The subtropical Mascarene high and low-cloud amount over the south Indian Ocean maximizes in summer and late winter, unlike in other ocean basins. Despite this unique feature, its maintenance mechanisms were not understood well. In a series of studies, it is shown that the Mascarene high and low clouds constitute a positive feedback system. In summer, land-sea thermal contrast between the Australian continent and the southeastern Indian Ocean kicks off this positive feedback to maintain the Mascarene high. In winter, the Asian summer monsoon and midlatitude storm-track activity externally modulate this system, reinforcing the Mascarene high.

Miyamoto, A., H. Nakamura, T. Miyasaka, Y. Kosaka, B. Taguchi, and K. Nishii, 2022, Maintenance mechanisms of the wintertime subtropical high over the south Indian Ocean, Journal of Climate, 35, 2989-3005, https://doi.org/10.1175/JCLI-D-21-0518.1.

Miyamoto, A., H. Nakamura, T. Miyasaka, and Y. Kosaka, 2022, Wintertime weakening of low-cloud impacts on the subtropical high in the south Indian Ocean, Journal of Climate, 35, 323-334, https://doi.org/10.1175/JCLI-D-21-0178.1.

Miyamoto, A., H. Nakamura, T. Miyasaka, and Y. Kosaka, 2021, Radiative impacts of low-level clouds on the summertime subtropical high in the south Indian Ocean simulated in a coupled general circulation model. Journal of Climate, 34, 3991-4007, https://doi.org/10.1175/JCLI-D-20-0709.1.

Miyamoto, A., H. Nakamura, and T. Miyasaka, 2018, Influence of the subtropical high and storm track on low-cloud fraction and its seasonality over the south Indian Ocean. Journal of Climate, 31, 4017-4039, https://doi.org/10.1175/JCLI-D-17-0229.1.