scholarly journals An intensified East Asian winter monsoon in the Japan Sea between 7.9 and 6.6 Ma

Geology ◽  
2020 ◽  
Vol 48 (9) ◽  
pp. 919-923 ◽  
Author(s):  
Kenji M. Matsuzaki ◽  
Noritoshi Suzuki ◽  
Ryuji Tada
Keyword(s):  
Late Miocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Japan Sea ◽  
Winter Monsoon ◽  
Northwestern Pacific ◽  
Asian Winter Monsoon ◽  
Marginal Sea ◽  
The Japan Sea ◽  
Cooling Phase

Abstract The Japan Sea was a semi-closed marginal sea mainly connected to the subarctic northwestern Pacific via shallow seaways during the late Miocene. We use a multiple regression analysis with common extant radiolarian species groups to estimate the sea-surface temperature (SST) for the period between 9.1 and 5.3 Ma. Our results show a cooling of 8 °C between 7.9 and 6.6 Ma, when the SST dropped from 24 °C to 16 °C. We infer that this cooling dominantly reflects wintertime cooling related to an intensified East Asian winter monsoon. On the other hand, cooling of the summertime SST occurred from 6.6 to 5.8 Ma, suggesting that the late Miocene global cooling is composed of a wintertime cooling phase from 7.9 to 6.6 Ma and summertime cooling phase from 6.6 to 5.8 Ma.

scholarly journals Supplemental Material: An intensified East Asian winter monsoon in the Japan Sea between 7.9 and 6.6 Ma

2020 ◽  
Author(s):  
Kenji Matsuzaki ◽  
et al.
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Japan Sea ◽  
Winter Monsoon ◽  
Sea Surface ◽  
Asian Winter Monsoon ◽  
The Japan Sea

Details of the method used to estimate radiolarian-based sea-surface temperature.<br>

scholarly journals Zonal shift in the cold airmass stream of the East Asian winter monsoon

2021 ◽  
Author(s):  
Qian Liu ◽  
Guixing Chen
Keyword(s):  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Phase Changes ◽  
Dominant Factor ◽  
Northwestern Pacific ◽  
Asian Winter Monsoon ◽  
Peak Location ◽  
Interdecadal Timescale

Abstract The East Asian winter monsoon exhibits long-term variations in intensity and spatial pattern, though the latter one is less understood. To investigate the long-term spatial variations of the EAWM and their possible causes, we propose a new position index of the EAWM by quantifying the low-level East Asian stream (EAS) of cold airmass in the Lagrangian sense. Based on the new-defined index, we find that the EAS undergoes an evident zonal shift between two channels over the land and coast. At interdecadal timescale, the peak location of the EAS is displaced eastward, with an increasing southward cold airmass flux at the coast since the mid-1960s. The interannual shift of the EAS presents not only the zonal oscillation of peak location between two channels but also the width changes of coastal channel over the northwestern Pacific. These shifts in the EAS are related to the strength changes of two source cold airmass streams from Siberia or Bering Sea, which are associated with the phase changes in the upper-tropospheric atmospheric teleconnections. At interdecadal timescale, the phase change in the North Atlantic Oscillation modulates the zonal shift in the EAS via the East Atlantic-West Russia teleconnection. At interannual timescale, the Pacific/North American teleconnection becomes the dominant factor altering the zonal shift and width change of the EAS.

Late Holocene aeolian sedimentation in the Tottori coastal dune field, Japan Sea, affected by the East Asian winter monsoon

2016 ◽  
Vol 397 ◽  
pp. 147-158 ◽  
Author(s):  
Toru Tamura ◽  
Yoshinori Kodama ◽  
Mark D. Bateman ◽  
Yu Saitoh ◽  
Naofumi Yamaguchi ◽  
...  
Keyword(s):  
Late Holocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Japan Sea ◽  
Winter Monsoon ◽  
Coastal Dune ◽  
Dune Field ◽  
Asian Winter Monsoon

scholarly journals The Climatology and Interannual Variability of the East Asian Winter Monsoon in CMIP5 Models

2014 ◽  
Vol 27 (4) ◽  
pp. 1659-1678 ◽  
Author(s):  
Hainan Gong ◽  
Lin Wang ◽  
Wen Chen ◽  
Renguang Wu ◽  
Ke Wei ◽  
...  
Keyword(s):  
East Asia ◽  
Interannual Variability ◽  
Large Scale ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Cmip5 Models ◽  
Northwestern Pacific ◽  
Cold Bias ◽  
Asian Winter Monsoon

Abstract In this paper the model outputs from the Coupled Model Intercomparison Project (CMIP) phase 5 (CMIP5) are used to examine the climatology and interannual variability of the East Asian winter monsoon (EAWM). The multimodel ensemble (MME) is able to reproduce reasonably well the circulation features of the EAWM. The simulated surface air temperature still suffers from a cold bias over East Asia, but this bias is reduced compared with CMIP phase 3 models. The intermodel spread is relatively small for the large-scale circulations, but is large for the lower-tropospheric meridional wind and precipitation along the East Asian coast. The interannual variability of the EAWM-related circulations can be captured by most of the models. A general bias is that the simulated variability is slightly weaker than in the observations. Based on a selected dynamic EAWM index, the patterns of the EAWM-related anomalies are well reproduced in MME although the simulated anomalies are slightly weaker than the observations. One general bias is that the northeasterly anomalies over East Asia cannot be captured to the south of 30°N. This bias may arise both from the inadequacies of the EAWM index and from the ability of models to capture the EAWM-related tropical–extratropical interactions. The ENSO–EAWM relationship is then evaluated and about half of the models can successfully capture the observed ENSO–EAWM relationship, including the significant negative correlation between Niño-3.4 and EAWM indices and the anomalous anticyclone (or cyclone) over the northwestern Pacific. The success of these models is attributed to the reasonable simulation of both ENSO’s spatial structure and its strength of interannual variability.

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

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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