The Impact of Long-lasting Northerly Surges of the East Asian Winter Monsoon on Tropical Cyclogenesis and its Seasonal March

Abstract This research investigates the impact of local sea surface temperature (SST) on the 2-month (January and February) accumulated snowfall over the Yeongdong (YD) region. The YD region is strongly affected by synoptic-scale factors such as the East Asian winter monsoon (EAWM). The relationships of snowfall over the YD region to the EAWM and local SST are examined based on observational analyses and sensitivity experiments using a regional climate model. In the sensitivity experiments, local SST is replaced with the 33-yr mean winter SST (1982–2014). The observational analysis shows that both the synoptic environment and local SST are important factors for the occurrence of anomalous heavy snowfall over the YD region. The favorable synoptic environments can be characterized by eastward expansion of the Siberian high over Manchuria and corresponding enhancement of easterly anomalies over the YD region. These conditions are more frequently observed during the weak EAWM years than during the strong EAWM. Furthermore, warm SST over the East Sea contributes to heavy snowfall over the YD region by providing heat and moisture in the lower troposphere, which are important sources of energy for the formation of heavy snowfall. Warm SST anomalies over the East Sea enhance low-level moisture convergence over the YD region, while cold SST anomalies lead to reduced moisture convergence. Sensitivity experiments indicate that local SST can significantly affect snowfall amount over the YD region when the synoptic environments are favorable. However, without these synoptic conditions (expansion of the Siberian high and easterly inflow), the impact of local SST on the snowfall over the YD region is not significant.

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Response of the East Asian Winter Monsoon to Strong Tropical Volcanic Eruptions

Journal of Climate ◽

10.1175/jcli-d-15-0600.1 ◽

2016 ◽

Vol 29 (13) ◽

pp. 5041-5057 ◽

Cited By ~ 8

Author(s):

Jiapeng Miao ◽

Tao Wang ◽

Yali Zhu ◽

Jinzhong Min ◽

Huijun Wang ◽

...

Keyword(s):

East Asian Winter Monsoon ◽

North Pacific Ocean ◽

East Asian ◽

Volcanic Eruptions ◽

Winter Monsoon ◽

Heat Fluxes ◽

Siberian High ◽

Asian Winter Monsoon ◽

The Third ◽

The Impact

Abstract In this study, a 600-yr integration performed with the Bergen Climate Model (BCM), version 2.0, was used to investigate the impact of strong tropical volcanic eruptions (SVEs) on the East Asian winter monsoon (EAWM). It is found that SVEs have an important influence on the East Asian winter climate. The volcanic forcing can cause changes in surface heat fluxes and tropospheric circulation, particularly over the tropics and high-latitude regions. As a result, Arctic Oscillation enters into its positive phase in the first two winters after SVEs. The associated circulation weakens the Siberian high and reduces the cold air transport to East Asia, which is not conducive to the enhancement of the EAWM during this period. At the same time, the North Pacific Ocean gradually cools and shapes La Niña–like sea surface temperature (SST) anomalies in the third winter after SVEs. The Walker circulation is strengthened over the Pacific, and two anomalous lower-tropospheric cyclones are located over the South China Sea and southeast of Japan, respectively. Therefore, related northeasterly wind anomalies appear along the East Asian coast, indicating a strengthened EAWM during this period. Meanwhile, the enhanced Siberian high and East Asian trough further contribute to the enhancement of EAWM in the third winter. It is therefore concluded that the SVEs-induced climate changes over the tropical Pacific and north polar regions play an important role in regulating the EAWM in the posteruption winters.

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Recent 7.3 ka mud records of the East Asian winter monsoon from the inner shelf of the East China Sea

Advances in Earth and Environmental Sciences ◽

10.2495/icesep131381 ◽

2013 ◽

Author(s):

F. Xu ◽

G. Sun ◽

A. Li

Keyword(s):

East China Sea ◽

East Asian Winter Monsoon ◽

East Asian ◽

Winter Monsoon ◽

East China ◽

The East China Sea ◽

Inner Shelf ◽

China Sea ◽

Asian Winter Monsoon

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Influence of East Asian Winter Monsoon on Particulate Matter Pollution in Typical Regions of China

Atmospheric Environment ◽

10.1016/j.atmosenv.2021.118213 ◽

2021 ◽

pp. 118213

Author(s):

L.I. Yanjun ◽

A.N. Xingqin ◽

Z.H.A.N.G. Peiqun ◽

Y.A.N.G. Jianling ◽

W.A.N.G. Chao ◽

...

Keyword(s):

Particulate Matter ◽

East Asian Winter Monsoon ◽

East Asian ◽

Winter Monsoon ◽

Asian Winter Monsoon ◽

Particulate Matter Pollution

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East Asian winter monsoon variation during the last 3000 years as recorded in a subtropical mountain lake, northeastern Taiwan

The Holocene ◽

10.1177/09596836211019094 ◽

2021 ◽

pp. 095968362110190

Author(s):

Tsai-Wen Lin ◽

Stefanie Kaboth-Bahr ◽

Kweku Afrifa Yamoah ◽

André Bahr ◽

George Burr ◽

...

Keyword(s):

Grain Size ◽

East Asian Winter Monsoon ◽

East Asian ◽

Winter Monsoon ◽

Mountain Lake ◽

Sediment Grain Size ◽

Global Monsoon ◽

Asian Winter Monsoon ◽

The Past ◽

Monsoon System

The East Asian Winter Monsoon (EAWM) is a fundamental part of the global monsoon system that affects nearly one-quarter of the world’s population. Robust paleoclimate reconstructions in East Asia are complicated by multiple sources of precipitation. These sources, such as the EAWM and typhoons, need to be disentangled in order to understand the dominant source of precipitation influencing the past and current climate. Taiwan, situated within the subtropical East Asian monsoon system, provides a unique opportunity to study monsoon and typhoon variability through time. Here we combine sediment trap data with down-core records from Cueifong Lake in northeastern Taiwan to reconstruct monsoonal rainfall fluctuations over the past 3000 years. The monthly collected grain-size data indicate that a decrease in sediment grain size reflects the strength of the EAWM. End member modelling analysis (EMMA) on sediment core and trap data reveals two dominant grain-size end-members (EMs), with the coarse EM 2 representing a robust indicator of EAWM strength. The downcore variations of EM 2 show a gradual decrease over the past 3000 years indicating a gradual strengthening of the EAWM, in agreement with other published EAWM records. This enhanced late-Holocene EAWM can be linked to the expansion of sea-ice cover in the western Arctic Ocean caused by decreased summer insolation.

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