Chart showing the northward propagation of the moisture transport supplied by the East Asian summer monsoon between 1961 and 2017
The interdecadal northward propagation of the moisture transport supplied by the East Asian summer monsoon in terms of column moisture transport anomalies in East China along 105°–120°E during 1961–2017. Credit: Ding et al. [2020], Figure 15a
Source: Journal of Geophysical Research: Atmospheres

Meiyu is the Chinese name for the monsoon season in East Asia. Understanding the mechanisms and variations of the Meiyu system is key for weather forecasting and climate projection in Eastern Asian countries such as China, Japan and Korea.

Ding et al. [2020] review the multi-time scale variability of the Meiyu. They also examine its extreme precipitation events, as well as the relationships between the multi-scale variability of Meiyu and the Asian summer monsoon. The foci are placed on the long-term trend, interdecadal, interannual, and seasonal variations, and the prediction skills of extreme precipitation by operational climate models.

On the multi–time scales from quasi-biweekly to intra-seasonal and inter-annual, and in regions from the tropics to middle and high latitudes, the authors explore the impact of various factors and meteorological regimes on the variability of the East Asian Meiyu. These include the El Niño–Southern Oscillation (ENSO) and the Tropospheric Biennial Oscillation (TBO) on inter-annual time scale, the variations of East Asian summer monsoon on decadal time scale, and the continued impacts of global warming, Pacific Decadal Oscillation (PDO) and the Atlantic Multi-decadal Oscillation (AMO) on inter-decadal scale and long-term trend.

While being a mighty natural system, the Meiyu is susceptible to such anthropogenic effects as global warming, urbanization, and aerosol effects, as seen in some specific characteristics including significantly weakened continuous rain, uneven spatial distribution of precipitation, and increased (decreased) number of strong (weak) precipitation days.

Citation: Ding, Y., Liang, P., Liu, Y., & Zhang, Y. [2020]. Multiscale variability of Meiyu and its prediction: A new review. Journal of Geophysical Research: Atmospheres, 125, e2019JD031496.

—Zhanqing Li, Editor, JGR: Atmospheres

Text © 2020. The authors. CC BY-NC-ND 3.0
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