Possible association of the western Tibetan Plateau snow cover with the decadal to interdecadal variations of northern China heatwave frequency

Wu, Zhiwei; Jiang, Zhihong; Li, Minglu; Zhong, Shanshan; Wang, Lijuan

doi:10.1007/s00382-012-1439-4

Cited by 105 publications

(67 citation statements)

References 41 publications

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“…Is there any precursor of these two modes? The spring thermal condition over the TP has been known as a precursor of Asian summer climate anomalies through the persistence of snow anomalies (Wu and Kirtman 2007;Zhao et al 2007a;Wu et al 2010Wu et al , 2012a. Is the autumn thermal anomaly over the TP a precursor of winter climate anomalies?…”

Section: B Discussionmentioning

confidence: 99%

Dominant Modes of Wintertime Upper-Tropospheric Temperature Variations over Asia and Links to Surface Climate

Jiang

Yang

et al. 2013

Journal of Climate

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In this study, the authors investigate the variations and predictability of wintertime upper-tropospheric temperature (UTT) over Asia, which are often linked to severe climate anomalies, and the associated features of large-scale circulation and surface climate. The ECMWF Interim Re-Analysis (ERA-Interim) and hindcast of the NCEP Climate Forecast System, version 2 (CFSv2), are mainly analyzed.The first empirical orthogonal function mode of UTT shows a dipole structure, with a strong positive center over southern China and a weak negative center over Mongolia. The second mode is featured by a monopole variation, with a positive center appearing from the northwestern Tibetan Plateau (TP) to Japan. The third mode exhibits a tripole pattern, with two positive centers over Pakistan and the Sea of Japan and a negative center over central Asia. The first mode is linked to El Niño-Southern Oscillation, accompanied by surface warming over the southeastern TP and deficient precipitation over southern China, the Korean Peninsula, and from equatorial East Africa to the east of the TP. The second mode is associated with circulation anomalies similar to those associated with the Arctic Oscillation, with significant warming over East Asia. The third mode features two wave trains and is linked to the Middle East jet stream, and is associated with excessive precipitation from the eastern TP to southern Japan. The CFSv2 can predict the first mode skillfully by several months in advance, but it shows little skill in predicting the second and third modes.

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Section: B Discussionmentioning

confidence: 99%

Dominant Modes of Wintertime Upper-Tropospheric Temperature Variations over Asia and Links to Surface Climate

Jiang

Yang

et al. 2013

Journal of Climate

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“…Over North America, the change of phase of ENSO and the associated sea surface temperature anomalies excites boundary and circulation anomalies that persist through the Boreal summer, influencing heatwave frequency [Wu et al, 2012a]. Over north China, variability in snow cover over the Tibetan Plateau results in increased (decreased) high-pressure anomalies and more heatwaves when snow cover is lower, inducing positive feedbacks [Wu et al, 2012b].…”

Section: The Relative Influence Of Low-frequency Modesmentioning

confidence: 99%

“…While it is outside the scope of the present study to physically quantify how interannual variability influences Australian heatwaves, some progress has been made on how interannual variability influences heatwave frequency over North America [Wu et al, 2012a] and north China [Wu et al, 2012b]. Over North America, the change of phase of ENSO and the associated sea surface temperature anomalies excites boundary and circulation anomalies that persist through the Boreal summer, influencing heatwave frequency [Wu et al, 2012a].…”

Section: The Relative Influence Of Low-frequency Modesmentioning

confidence: 99%

Relationships between climate variability, soil moisture, and Australian heatwaves

2015

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While it is established that low-frequency climate variability modes have a dominant role on Australia's climate, limited work to date has focused on relationships between climate variability and Australian heatwaves. Moreover, heatwaves are a distinctive type of extreme weather that can be classified by multiple characteristics, such as intensity, frequency, duration, and timing. This study identifies the relationships between known modes of climate variability that influence Australian climate, and discrete seasonal characteristics of the intensity, frequency, duration, and timing of heatwaves. The large-scale seasonal modes of the El Niño/Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), and the Southern Annular Mode (SAM) are investigated for extended Austral summers commencing between the years 1911 and 2012. While ENSO is found to have the strongest relationship with Australian heatwave characteristics, this study finds that ENSO's influence differs between heatwave frequency, duration, intensity, and timing. Regions dominated by ENSO experience more, longer lasting and hotter heatwaves combined with an earlier commencement of the heatwave season during El Niño phases. The exception to this is southeast Australia, where SAM is generally more dominant. In contrast, the IOD provides little indication of seasonal heatwave characteristics due to its relative inactivity during the Austral summer months. Lastly, we show that antecedent soil moisture has varying strengths of relationships with Australian heatwave characteristics, exhibiting relationships with heatwave intensity and timing over some regions where none are detected between large-scale modes. However, while significant relationships between dry antecedent soil moisture and extreme heatwaves do exist over Australia, these appear to be slightly weaker than similar relationships over Europe reported in other studies.

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“…In this paper, the National Centers for Environment Prediction/ National Center for Atmospheric Research (NCEP/NCAR) reanalysis and Twentieth Century Re-Analysis Project for the period of 1961-2010 are used to reveal the large scale atmospheric circulation anomalies and total atmospheric diabatic heating patterns (Kalnay et al 1996;Whitaker et al 2004;Compo et al 2006). These reanalysis datasets for examining thermal status over TP (such as sensible heating, radiative and latent heating) has been validated by many previous studies (Liu et al 2001;Duan and Wu 2008;Wu et al 2012aWu et al , 2016. Note that the long-term linear trends in all datasets have been removed.…”

Section: Datamentioning

confidence: 92%

The link between Tibetan Plateau monsoon and Indian summer precipitation: a linear diagnostic perspective

Sielmann

Zhu

et al. 2017

Clim Dyn

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flux. Composite analysis of anomalous stationary wave flux activity (after Plumb in J Atmos Sci 42:217-229, 1985) strongly indicate that non-orographic effects (diabatic heating and/or interaction with transient eddies) of the Tibetan Plateau contribute to the generation of an anomalous cyclone (anti-cyclone) over the western TP. (ii) Anomalous TPSM generation shows that strong TPSM years are related to the positive surface sensible heating anomalies over the eastern TP favoring the strong diabatic heating in summer. While negative TPSM years are associated with the atmospheric circulation anomalies during the preceding spring, enhancing northerly dry-cold air intrusions into TP, which may weaken the condensational heat release in the middle and upper troposphere, leading to a weaker than normal summer monsoon over the TP in summer.

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Possible association of the western Tibetan Plateau snow cover with the decadal to interdecadal variations of northern China heatwave frequency

Cited by 105 publications

References 41 publications

Dominant Modes of Wintertime Upper-Tropospheric Temperature Variations over Asia and Links to Surface Climate

Dominant Modes of Wintertime Upper-Tropospheric Temperature Variations over Asia and Links to Surface Climate

Relationships between climate variability, soil moisture, and Australian heatwaves

The link between Tibetan Plateau monsoon and Indian summer precipitation: a linear diagnostic perspective

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