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This research aims to clarify how soil moisture influences precipitation in both dry and wet seasons over the Maritime Continent.

The Contrasting Role of Soil Moisture on the Diurnal Cycle of Precipitation During Dry and Wet Seasons Over the Maritime Continent

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Randomized trial investigates soil moisture effects on precipitation in different seasons, suggesting diverse impacts.

This research aims to clarify how soil moisture influences precipitation in both dry and wet seasons over the Maritime Continent.
Used a coupled land-atmosphere regional model for simulations.
Conducted experiments with realistic soil moisture (CTL) and dry soil conditions (SENS) across four seasons.
Analyzed diurnal cycles of precipitation and evaporation.
In dry seasons, SENS leads to a significant reduction in rainfall due to lower transpiration and evaporation.
In wet seasons, SENS experiences increased rainfall from ocean moisture despite lower terrestrial evaporation.
Observed a marked suppression of afternoon precipitation peaks during dry seasons and a shift in nocturnal rainfall patterns during wet seasons.

Zhou et al. (2026) studied this question.

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