East Asian Winter Monsoon Impacts the ENSO-related Teleconnections and North American Seasonal Air Temperature Prediction

Ma, Tianjiao; Chen, Wen; Nath, Debashis; Graf, Hans‐F.; Wang, Lin; Huangfu, Jingliang

doi:10.1038/s41598-018-24552-3

Cited by 32 publications

(45 citation statements)

References 49 publications

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“…In this study, we focused on the EP ENSO's influence on the EAT, one member of the EAWM system, and explored the potential factors modulating the relationship between EP ENSO and the EAT. On another aspect, some other studies showed that there is a large variability of EAWM which is independent with ENSO (Ma et al, 2018;Yu and Sun, 2018). Ma et al (2018) further suggested that the EAWM variability independent of ENSO could modulate ENSO's impact on the Pacific-North American teleconnection pattern and North American winter climate.…”

Section: Conclusion and Discussionmentioning

confidence: 95%

“…The result shows that the correlation between the two is 0.32, significant at the 99% confidence level, implying that the variabilities of ENSO and the NPO are related. To explore the solo impact of the NPO (which is independent of ENSO) on the EAT, based on previous studies (Chen et al, 2013a;Ma et al, 2018), the linear regression method is employed to remove the Niño3-related part from the NPO index, and the remainder (the NPO_res index) is used for analysis (Figure 4). Different phase combinations of the NPO_res and La Niña are shown in Table 3.…”

Section: Connection Between La Niña and The Eatmentioning

confidence: 99%

“…East Asian climate variability is very complicated and influenced by extra-tropical processes (Ma et al, 2018). In addition to the Asian PV and NPO, there could F I G U R E 7 Composite SLP anomalies (shading; unit: hPa) and wind anomalies (vectors; unit: m/s) at 850 hPa during (a) La Niña/SE and (b) La Niña/W-NE years in 1949-2018.…”

Section: Connection Between La Niña and The Eatmentioning

confidence: 99%

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Potential factors modulating ENSO's influences on the East Asian trough in boreal winter

Sun

2020

Intl Journal of Climatology

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The eastern Pacific (EP) El Niño-Southern Oscillation (ENSO) is an important impact factor for the East Asian trough (EAT) variability during boreal winter. However, not all ENSO events can result in anomalous EAT events, which indicates that there could be some other factors modulating the relationship between ENSO and the EAT. The analysis of atmospheric circulations indicates that the intensity of the Asian Polar vortex (PV) plays an important role in the El Niño-EAT connection. The strengthened Asian PV favours the wavetrain triggered by El Niño events propagates eastward from the North Pacific to East Asia and finally weakens the EAT. In contrast, during El Niño years with the weakened Asian PV, El Niño's influences are confined over western Siberia and the wave activity flux over Eurasia is weak, which consequently leads to a weak response of the EAT. For the La Niña-EAT connection, the North Pacific Oscillation (NPO) is a potential modulating factor. The La Niña and negative-phase NPO have a strengthened effect on the EAT, resulting in a strong response of the EAT to La Niña events. In contrast, the effects of La Niña and positive-phase NPO on the EAT are offset, leading to a weak response of the EAT to La Niña events. The above results are further confirmed by a numerical simulation of the pre-industrial Control experiment. Therefore, the simultaneous occurrence of the Asian PV and NPO should be a great concern when understanding and predicting the EAT based on ENSO information.

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Section: Conclusion and Discussionmentioning

confidence: 95%

Section: Connection Between La Niña and The Eatmentioning

confidence: 99%

Section: Connection Between La Niña and The Eatmentioning

confidence: 99%

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Potential factors modulating ENSO's influences on the East Asian trough in boreal winter

Sun

2020

Intl Journal of Climatology

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“…Previous research has indicated that the ENSO is one of the strongest signals yet observed for the air-sea interaction on an interannual timescale, its occurrence results in large-scale atmospheric circulation anomalies and leads to a significant impact on the climate of many places around the world (Dai and Wigley 2000, Larkin 2005, Jia and Ge 2017, Agilan and Umamahesh 2018. Especially in China, many studies have pointed out that extreme precipitation events in most areas of China are significantly affected by ENSO (Gao et al 2006, Wang et al 2008b, Ma et al 2018a. In the warm phase years (El Niño years), there was less precipitation in southeast China, while the opposite occurred during the cold phase years (La Niña) (Jin et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal variations in extreme precipitation and their potential driving factors in non-monsoon regions of China during 1961–2017

Ding

Wang

2019

Environ. Res. Lett.

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Extreme precipitation events affect the ecological environment and are also important for the sustainable development of regional socioeconomics. Although there are some local studies on extreme precipitation events in which the temporal and spatial variation characteristics of extreme precipitation events in non-monsoon regions (NMRs) are systematically assessed, detailed study on the driving mechanisms of variation are becoming increasingly important. In this study, nine extreme precipitation indices were used to analyze the characteristics of extreme precipitation event spatiotemporal variations in NMRs in China during 1961-2017. The results show that except for the consecutive dry days, which shows a significant decreasing trend (P < 0.01) of −2.33 days/decade, all other indices showed obvious increasing trends, especially the indices of wet day precipitation (PRCPTOT), highest 5 day precipitation (RX5day) and light rain days (R5 mm), with significantly increasing trends (P< 0.01) of 6.80 mm/decade, 0.73 mm/decade and 0.45 days/decade, respectively. In addition, a correlation analysis between altitude, longitude, latitude and extreme precipitation shows that stations at an altitude of more than 3500 m have significant correlations with both extreme precipitation and longitude in NMRs (P< 0.05). In addition, results also indicated that there are significant relationships between extreme precipitation events in NMRs and large-scale ocean-atmosphere circulation patterns (P< 0.05). The rapid increase in extreme precipitation indices over the past 20 years is closely related to the Atlantic Multidecadal Oscillation shift to a warm phase, while the Pacific Decadal Oscillation, El Niño-Southern Oscillation and Summer Monsoon Index show significant correlation with the extreme indices only in certain seasons (P< 0.05).

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“…As a major monsoon system, the East Asian monsoon is an important modulator of the East Asian climate, which shapes the seasonal march of major rain belts and the Meiyu-Baiu rains with its significant variability from intraseasonal to interdecadal scales [26]. It also affects the ENSO-related teleconnections that extend the influence to the global scale [39]. As PE is the reciprocal of atmospheric water residence time, its variability is closely associated with the activity of the East Asia summer monsoon (EASM) [19,21].…”

Section: Introductionmentioning

confidence: 99%

Interdecadal Variability of Summer Precipitation Efficiency in East Asia

Wang

Gui

et al. 2019

Advances in Meteorology

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Precipitation efficiency (PE) is a crucial physical quantity in convective processes, describing the efficiency of rainfall generation from cloud detrainment. Although the importance of PE in extreme precipitation events is widely accepted, the evolution of PE in the warming climate and the associated moisture processes in East Asia are still not well understood. To address these issues, the interdecadal variability of PE in East Asia during summer in 1979–2016 is investigated in this study. Two major modes of summertime precipitation efficiency are identified using Empirical Orthogonal Function (EOF) analysis. The leading EOF mode (EOF1) has a dipole pattern that reveals the variations of mean precipitation efficiency. The second EOF mode (EOF2) presents a quadrupole pattern that shows changes in the variability of precipitation efficiency. Both EOF modes exhibit significant interdecadal variability (IDV). The IDV of EOF1 is closely associated with the phase change of the Pacific decadal oscillation (PDO). The Pacific sea surface temperature anomalies associated with the PDO can excite wind anomalies that significantly modulate moisture transport and further alter the mean precipitation efficiency in East Asia. The IDV of EOF2 can be attributed to the interdecadal change of occurrence frequency of Eastern Pacific El Niño-Southern Oscillation (ENSO) events, which affect water vapor transport by inducing an East Asia-Pacific teleconnection-like wave train anomaly pattern. The IDV patterns of precipitation efficiency for both the mean value and variability will improve the ability to predict precipitation in East Asia.

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East Asian Winter Monsoon Impacts the ENSO-related Teleconnections and North American Seasonal Air Temperature Prediction

Cited by 32 publications

References 49 publications

Potential factors modulating ENSO's influences on the East Asian trough in boreal winter

Potential factors modulating ENSO's influences on the East Asian trough in boreal winter

Spatiotemporal variations in extreme precipitation and their potential driving factors in non-monsoon regions of China during 1961–2017

Interdecadal Variability of Summer Precipitation Efficiency in East Asia

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