Breakdown of the Summertime Meridional Teleconnection Pattern over the Western North Pacific and East Asia since the Early 2000s

Li, Xinyu; Lu, Riyu

doi:10.1175/jcli-d-19-0746.1

Cited by 20 publications

(3 citation statements)

References 100 publications

(118 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the significant disturbance of human activities such as reservoir operation to the regional hydrological processes, we examined the regime shifts of the RC and its influential factors (EC and SC) using a sequential climate regime shift test developed by Rodionov (2004); this does not require a priori hypothesis of the input series and has been widely applied in hydrology and climate communities (Guo et al 2020, Li andLu 2020). The regime shift index (RSI) was calculated with a probability level of 0.1.…”

Section: Methodsmentioning

confidence: 99%

Annual runoff coefficient variation in a changing environment: a global perspective

Xiong

Yin

Guo

et al. 2022

Environ. Res. Lett.

View full text Add to dashboard Cite

Assessing variations in the annual runoff coefficient (RC) on a basin scale is crucial for understanding the hydrological cycle under natural and anthropogenic changes, yet a systematic global assessment remains unexamined from a water-balance perspective. Here, we combine observation-based runoff and precipitation datasets to quantify basin-averaged RC changes in 433 major global river basins during the period 1985–2014. Thereafter, the ratios of terrestrial water storage changes and evaporation to precipitation (SC and EC, respectively) are obtained to evaluate the factors driving the RC changes. The results show that 12.93% of the basins experience significant decreasing trends in RC, with slopes ranging from −0.55 ± 0.17% yr−1 to −0.05 ± 0.02% yr−1, while 6.47% basins show increasing RCs with slopes ranging from 0.09 ± 0.04% yr−1 to 0.56 ± 0.17% yr−1. A higher percentage (62.95%) of basins reveal decreasing RCs for the regions with considerable human intervention compared to those (58.24%) with dominant natural variability. Changes in EC dominate the RC changes over 79.68% of the basins for both increasing and decreasing trends, with a maximum contribution (53.65%) from transpiration, among other partitioned components. Corroborated inferences from explicit investigation in the Yangtze River basin highlight the robustness of our results for global water managers and policymakers.

show abstract

Section: Methodsmentioning

confidence: 99%

Annual runoff coefficient variation in a changing environment: a global perspective

Xiong

Yin

Guo

et al. 2022

Environ. Res. Lett.

View full text Add to dashboard Cite

show abstract

“…As the strongest interannual signal in the tropical Paci c, ENSO also features signi cant interdecadal variations, such as the regime shifts in the late 1970s and late 1990s (Duan et al, 2004;Hu et al, 2016;Hu et al, 2020;Hu et al, 2013;Li and Lu, 2020;McPhaden, 2012;Xiang et al, 2013). For example, after the late 1970s, ENSO variability and period increased (Wang, 1995).…”

Section: Introductionmentioning

confidence: 99%

The weakening relationship between ENSO and the following summer Pacific Japan teleconnection since the late 1990s

Wang

et al. 2023

Clim Dyn

View full text Add to dashboard Cite

The predictability and variability of extratropical climate are largely associated with tropical forcing through various teleconnections. The East Asia-Paci c/Paci c-Japan (EAP/PJ) teleconnection is one the most important factors affecting the summer climate in East Asia. In this work, we con rm the weakening relationship between the El Niño-Southern Oscillation (ENSO) and the following summer EAP/PJ teleconnection after the late 1990s and diagnose the characteristics and possible causes with reanalysis and analysis data. The results show that compared with that during 1981-1998, ENSO is less conducive to the formation of anomalous anticyclones in the following summer in the Northwest Paci c and the northward-transmitted Rossby wave train from the Northwest Paci c during 2000-2017, resulting in a weaker summer EAP teleconnection. Meanwhile, variation of ENSO feature since 2000 with a suppressed variability leads to a weakened response in the tropical Indian Ocean in the spring and summer. The reduced sea surface temperature response in the tropical Indian Ocean suppresses the excitation of eastward-propagating Kelvin waves and declines the capacitor effect of the Indian Ocean, which are unfavorable for generating anomalies in the Northwest Paci c and motivate strong EAP teleconnection in meridional direction. Thus, the weakening relationship of ENSO-EAP after late 1990s is the result of the interactions of the suppressed ENSO variability and declined Indian Ocean capacitor effect.

show abstract

“…El Niño-Southern Oscillation (ENSO) is the dominant interannual mode of the coupled ocean-atmosphere system in the tropics, exerting important influences on the EASM via the atmospheric teleconnection (Zhang and Sumi 1999;Wang et al 2000Wang et al , 2021Chen 2002;Deser et al 2010;Hu et al 2017Hu et al , 2020Li and Lu 2020;Jiang et al 2021;Liu et al 2021). El Niño, as the warm phase of ENSO, generally develops in boreal summer and the early autumn, reaches its peak in boreal winter, and decays in the following spring and summer (An and Wang 2001;Tozuka and Yamagata 2003;Lau et al 2005;Xie et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Interdecadal change in the influence of El Niño in the developing stage on the central China summer precipitation

Chen

Long

et al. 2021

Clim Dyn

View full text Add to dashboard Cite

The central China summer precipitation (CCSP) is of great importance to the people's livelihood of this densely populated region, including the agriculture, ecosystems, water resources, economies, and health. Based on the observed precipitation, sea surface temperature (SST), and atmospheric reanalysis datasets, the present study investigates the effects of El Niño in the developing stage on the CCSP during 1960-2014. The results show that the CCSP anomalies exhibit significant negative correlations with the El Niño-related SST anomalies in both the simultaneous summer and the following winter, implying that the developing El Niño is important for modulating the CCSP. However, this climatic teleconnection of El Niño is unstable, with an obvious interdecadal change around the late 1980s. Specifically, the negative correlation is not statistically significant in the previous epoch before the late 1980s , but dramatically strengthens since the late 1980s (the post epoch for 1989-2014). Such an interdecadal change is closely associated with the change of the El Niño-related SST anomaly pattern. Compared to the previous epoch, the central Pacific El Niño occurs more frequently in the post epoch, leading to an interdecadal shift of the maximum warm SST anomalies from the eastern Pacific to the central Pacific. The resultant westward extension of the atmospheric circulation responses induces an anomalous low-level cyclone covering South China in the post epoch. It would prevent the southwest monsoon from delivering the moisture to the north and hence reduce the CCSP. While, in the previous epoch, the anomalous cyclone locates east of South China, exerting insignificant influence on the CCSP. This work highlights a strengthening effect of El Niño on the CCSP since the late 1980s, with great implications for the regional seasonal climate prediction.

show abstract

Breakdown of the Summertime Meridional Teleconnection Pattern over the Western North Pacific and East Asia since the Early 2000s

Cited by 20 publications

References 100 publications

Annual runoff coefficient variation in a changing environment: a global perspective

Annual runoff coefficient variation in a changing environment: a global perspective

The weakening relationship between ENSO and the following summer Pacific Japan teleconnection since the late 1990s

Interdecadal change in the influence of El Niño in the developing stage on the central China summer precipitation

Contact Info

Product

Resources

About