The impact of the Atlantic Multidecadal Oscillation (AMO) on Asian summer monsoon is investigated using a coupled atmosphere‐ocean global general circulation model by imposing AMO‐associated sea surface temperature anomalies in as boundary forcing, and allowing interactions outside Atlantic. positive AMO phase, characterized anomalous warm North cold South Atlantic, leads to strong Southeast east monsoons, late withdrawal Indian monsoon. These changes monsoons are mainly through feedbacks...

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One-point correlation analysis on upper-level meridional wind identified the existence of a teleconnection pattern in July, which emerges from North Africa to East Asia along westerly jet middle latitudes. We examined spatial and temporal structures this pattern, found unique characteristics rather different patterns other elements such as geopotential height, streamfunction vorticity. also investigated relationship between precipitation, suggested that teleconnectionis possible linkage EASM...

Using the National Centers for Environmental Prediction/National Center Atmospheric Research (NCEP/NCAR) Reanalysis data and satellite-observed outgoing long-wave radiation (OLR) data, we examined westward extension eastward contraction of North Pacific subtropical high in summer (NPSH). It was found that NPSH shows a great variability its western extent, both on seasonal interannual time scales. In order to examine variations NPSH, defined index as June-July-August (JJA) mean geopotential...

The East Asian summer monsoon is characterized by strong interactions among its components in the meridional direction. atmospheric convection over Philippine Sea (PSAC), western North Pacific subtropical high (WNPSH) and westerly jet stream (EAJ) are all closely related to rainfall Asia. In this study, we examined relationship on interannual timescale these factors, using National Centers for Environmental Prediction/National Center Atmospheric Research (NCEP/NCAR) Re-analysis data...

Abstract The meridional teleconnection patterns over the western North Pacific and East Asia (WNP–EA) during summer have a predominant role in affecting Asian climate on interannual time scale. A well-known seesaw pattern of tropical–subtropical precipitation is associated with teleconnection, subtropical anomaly has been previously viewed as result anomalous circulations teleconnection. In this study, however, authors suggest that anomalies, turn, can significantly affect large-scale may be...

Abstract The Silk Road pattern (SRP), which depicts the teleconnection along Asian jet, has been extensively investigated and commonly described as leading mode of upper-tropospheric meridional wind anomalies in summer. In this study, SRP is identified having a significant relationship with displacement jet (JMD), manifests zonal anomalies. This confirmed by correlation coefficient between indices for JMD SRP, 0.39 reaches statistical significance at 0.01 level. When northward (southward)...

Abstract Regional temperature changes are a crucial factor in affecting agriculture, ecosystems and societies, which depend greatly on local temperatures. We identify nonuniform warming pattern summer around the mid-1990s over Eurasian continent, with predominant amplified Europe–West Asia Northeast but much weaker Central Asia. It is found that concurs both phase shift of Atlantic Multi-decadal Oscillation (AMO) decadal change Silk Road Pattern (SRP), an upper-tropospheric teleconnection...

Abstract The circulation associated with extreme heat (EH) typically shows an anomalous anticyclone that enhances temperature through adiabatic heating, but this study indicates obvious spatial variation in eastern China. EH-related pattern China can be classified into three categories: typical extratropical pattern, monsoonal and foehn pattern. EH over northeastern north is characterized by a involving subsidence, the air increases throughout almost entire troposphere. In contrast, Yangtze...

Groundwater plays a crucial role in the formation of Badain Jaran Desert-Sand Dune Lake System, which has been designated UNESCO World Heritage Site 2024. However, region’s wetland ecosystem is significantly impacted by climate change and human activities. This study utilizes GRACE satellite data situ observation to establish groundwater storage anomaly (GWSA) time series for Desert its surrounding areas (BJDCA) from 2003 2022. The analysis reveals spatiotemporal patterns drought...

The basic features of the North Pacific subtropical anticyclone in summer are studied using European Centre for Medium Range Weather Forecasts (ECMWF) Re-Analysis data period (1979-1993). It has been shown that high displays substantial interannual variability at its western edge. Further analysis indicates a significant relationship between zonal variation high, and intensity atmospheric convection over warm pool. stronger (weaker) pool is associated with more eastward (westward) position...

One-point correlation analysis on upper-level meridional wind identified the existence of a teleconnection pattern in July, which emerges from North Africa to East Asia along westerly jet middle latitudes. We examined spatial and temporal structures this pattern, found unique characteristics rather different patterns other elements such as geopotential height, streamfunction vorticity. also investigated relationship between precipitation, suggested that teleconnectionis possible linkage EASM...

Abstract The authors examine the projected change in interannual variability of East Asian summer precipitation and dominant monsoonal circulation components twenty-first century under scenarios A1B A2 by analyzing simulated results 12 Coupled Model Intercomparison Project phase 3 (CMIP3) coupled models. Interannual standard deviation is used to depict intensity variability. An evaluation indicates that these models can reasonably reproduce essential features present-day both rainfall...

This study investigates the impacts of transition El Niño decaying phases on western North Pacific anticyclone (WNPAC) anomalies in subsequent summer with a coupled GCM. The modeling results suggest that Niños short lead to significant WNPAC following summer, which are contributed mainly by followed La Niñas, comparison those not Niñas. In contrast, long cases associated disappearance summer. These differences WNP circulation can be explained different configurations simultaneous SSTs Indian...

China suffers from frequent summer floods and droughts, but seasonal forecast skill of corresponding rainfall remains a key challenge. In this study, we demonstrate useful levels prediction over the Yangtze river valley for flows using new high resolution system. Further analysis sources predictability suggests that corresponds to skillful in deep tropics around Maritime Continent. The associated dynamical signals favor increased poleward water vapor transport South hence flow. level...

Abstract The Yangtze River basin (YRB), a typical East Asian monsoon region, experiences large year-to-year variability in summer precipitation and is subject to both floods droughts. There well-known seesaw relationship between the tropical western North Pacific YRB, but more than half of variance YRB cannot be explained by this pattern. authors therefore investigated other physical factors that might affect YRB. results indicate northeasterly anomaly lower troposphere north plays an...

Abstract This study investigated the drivers and physical processes for abrupt decadal summer surface warming increases in hot temperature extremes that occurred over Northeast Asia mid-1990s. Observations indicate an increase mean air (SAT) since Accompanying this warming, significant changes some extremes, characterized by daily maximum (Tmax), minimum (Tmin), annual hottest day (TXx), warmest night (TNx) were observed. There also frequency of days (SU) tropical nights (TR). Atmospheric...

We demonstrate a 1-year lagged extratropical response to the El Niño-Southern Oscillation (ENSO) in observational analyses and climate models. The maps onto Arctic is strongest North Atlantic, where it resembles Atlantic (NAO). Unexpectedly, these teleconnections are at least as strong better-known simultaneous winter connections. However, oppositein sign such that 1 year later, Niño followed by positive NAO, whereas La Niña negative NAO. may also interfere with ENSO teleconnections. show...

The Eurasian snow cover anomaly in spring has been considered as one of the important factors affecting East Asian summer monsoon (EASM). data for period from 1972 to 2004 are used extract dominant spatial patterns over region and examine their impacts on EASM through empirical orthogonal function (EOF) analysis. first EOF mode is generally characterized by a continent‐wide whole region, while second dominated an east‐west dipole structure Eurasia. Our study indicates that variability...

Abstract South China experiences extreme heat (EH) most frequently in eastern China. This study specifically explores the large-scale circulation anomalies associated with long-lived EH events south The results show that there is an anomalous cyclone (anticyclone) and active (inactive) convection over (the western Pacific) before onset; then, anticyclone develops moves northwestward dominates on onset day. maintains its strength then diminishes replaced by another migrating from Pacific...