Regionality of record-breaking low temperature events in China and its associated circulation

Kuang, Xueyuan; Zhang, Yaocun; Huang, Danqing; Huang, Ying

doi:10.1007/s00382-015-2670-6

Cited by 11 publications

(8 citation statements)

References 28 publications

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“…() concluded that the anomalies in geopotential heights at 500 and 1000 hPa over Eurasia might be the direct cause for the occurrence of regional extreme low temperature events in 2011. Previous work also has highlighted that the Siberian high is the dominant circulation system over the Eurasian continent during winter (Gong and Ho, ; Li et al ., ; Tubi and Dayan, ; Kuang et al ., ). Our results extend the previous works about the trends and abrupt change of temperature extremes, providing a more detailed view of the large‐scale circulation anomalies related with temperature extremes over the typical arid region of Central Asia.…”

Section: Conclusion and Discussionmentioning

confidence: 97%

Observed changes in maximum and minimum temperatures in Xinjiang autonomous region, China

Tao

Fischer

et al. 2017

Intl Journal of Climatology

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Changes in maximum and minimum temperature (Tmax and Tmin) are analysed to assess the regional extent of global warming in Xinjiang autonomous region, China, for the period of 1961-2015. Two nonlinear, non-stationary signal-processing methods - the Bernaola-Galván algorithm and the ensemble empirical mode decomposition method - are applied on daily time series of observations from 53 meteorological stations. Statistically significant abrupt change points are identified in 1996 in both annual Tmax and Tmin time series averaged for the whole province, while another one is identified in 1976 in the annual Tmin time series only. At local scale, most stations experience one abrupt change point in annual Tmax in the 1990s, but two or three change points in annual Tmin, mainly in the 1980s and 1990s. After the abrupt change points, the frequency and probability density of Tmax in summer and Tmin in winter are skewed towards the hotter part of the probability distribution. It is found that the hot temperature extremes in summer occur concurrently with El Niño events. Further results suggest that anomalies in geopotential height at 500hPa can be associated with the hottest and coldest months. The key regions of the anomalies are over the east of the Ural Mountains and the North Atlantic, while the geopotential height anomalies over Greenland and the east of the Ural Mountains are closely related to the hot and cold spells. © 2017 Royal Meteorological Society

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Section: Conclusion and Discussionmentioning

confidence: 97%

Observed changes in maximum and minimum temperatures in Xinjiang autonomous region, China

Tao

Fischer

et al. 2017

Intl Journal of Climatology

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“…2) The location of the jet axis is represented by the latitude of the maximum westerly flow at each longitude, based on the winter-mean wind speed at 300 hPa (Zhang et al 2006).…”

Section: B Methodsmentioning

confidence: 99%

“…On the one hand, the shift of the EAPJ can affect the variation of atmospheric circulation systems (e.g., the East Asia trough, Mongolian high pressure, and the blocking high) and therefore affect severe weather events, such as persistent low-temperature events and cold waves over East Asia (Zhang et al 1997;D. Wang et al 2009;Kuang et al 2016). The seasonal evolution of the EAPJ is consistent with that of precipitation over eastern China (Zhang et al 2008).…”

Section: Introductionmentioning

confidence: 95%

“…At the interannual scale, previous studies have emphasized the shift of the East Asian jet streams rather than the intensity variation in boreal winter (Lin and Lu 2005). The shift can reflect the interactions among different circulation systems (Zhang et al 2006;Schiemann et al 2009) and therefore impact the local weather and climate as well as downstream regions (Jhun and Lee 2004;Li et al 2004;Zhou and Yu 2005;Zhou and Zou 2010). On the one hand, the shift of the EAPJ can affect the variation of atmospheric circulation systems (e.g., the East Asia trough, Mongolian high pressure, and the blocking high) and therefore affect severe weather events, such as persistent low-temperature events and cold waves over East Asia (Zhang et al 1997;D.…”

Section: Introductionmentioning

confidence: 99%

“…The seasonal evolution of the EAPJ is consistent with that of precipitation over eastern China (Zhang et al 2008). On the other hand, the shift of the EASJ is highly associated with precipitation variations over China (Liao et al 2004;Kuang and Zhang 2006;Dong et al 2010;Ma et al 2011;Shen et al 2011;Xuan et al 2011;Sun and Yang 2012;Lu et al 2013). For example, the equatorward shift of the EASJ can affect the vertical momentum flux via the secondary circulation system and reinforce the water vapor flux transportation, and therefore enhance the precipitation over southern China (Zhang et al 2009;Wang et al 2011;Li and Zhang 2013).…”

Section: Introductionmentioning

confidence: 99%

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The Winter Concurrent Meridional Shift of the East Asian Jet Streams and the Associated Thermal Conditions

Zhang

Yan

Liao³

et al. 2019

Journal of Climate

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In this study, the concurrent meridional shift of the East Asian polar-front jet (EAPJ) and the East Asian subtropical jet (EASJ) and the associated thermal conditions have been investigated. The concurrent meridional shift is dominantly characterized by an out-of-phase shift of the two jets, as an equatorward shift of the EAPJ and a poleward shift of the EASJ, and vice versa. This shift is linked with the dipole surface air temperature (SAT) anomaly over the Eurasian continent and a La Niña–like sea surface temperature (SST) anomaly. Associated with the dipole SAT anomaly, the meridional temperature gradient (MTG) anomaly exhibits a tripole pattern from low to high latitudes over the Eurasian continent, as well as an enhanced maximum eddy growth rate and an anomalous divergence of Eliassen–Palm flux (E-P flux) over the regions between the EAPJ and EASJ. Additionally, the synoptic-scale transient eddy activities (STEA) significantly decrease over the high latitudes and enhance between the EAPJ and EASJ. All the anomalies would benefit the equatorward and poleward shift of the EAPJ and EASJ, respectively. The MTG, E-P flux and STEA anomalies are also indicated in that associated with the Niña-like SST anomaly. Particularly, the variations are evident in low latitudes. The pathway of the stationary Rossby wave activity flux anomalies shows an eastward Rossby wave packet propagation along the southern portion of the EAPJ is associated with the SAT anomaly and that along the northern portion of the EASJ is associated with the SST anomaly. The relative contributions of the two thermal conditions have emphasized the role of the dipole SAT anomaly, based on multilinear regression.

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Sources and paths of extreme cold surges over China and their associated atmospheric circulations

Ma,

Wei,

et al. 2024

Intl Journal of Climatology

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The extreme cold surges (ECSs) are among the extreme weather events that affect China. Here, a total of 31 ECSs that occurred from 1962 to 2018 in China were identified using observed temperature data. In addition, we used the hybrid single‐particle Lagrangian integrated trajectory (HYSPLIT) model to trace their sources. And the atmospheric circulation of ECSs with different paths were investigated. The ECSs were classified to K‐type, B‐type and S‐type ECSs (which was subdivided into the S1‐type, S2‐type and S3‐type) according to their origins and entry locations into China. The S‐type ECSs occurred the most, accounting for 58.06%. The duration and temperature drop of the K‐type ECSs were higher than those of others. And K‐type and S1‐type ECSs mainly affected Northeast China, S2‐type ECSs mainly affected the regions east of 105° E. For decadal variation, Since the 1980s, ECSs frequency has decreased (especially only one ECS occurred in the 1980s), and K‐type and S2‐type ECSs disappeared. Different types of cold surges have different atmospheric circulation characteristics. The “positive–negative–positive” wave train structures of geopotential height anomalies at 500 hPa were very conducive to the formations of K‐type, B‐type and S3‐type ECSs. For K‐type and S1‐type ECSs, the cold high gradually moved south to Siberia, and combined with the cyclone anomalies, causing the cold air to enter China. Before the B‐type ECSs occurred, cold high appeared in the west of Xinjiang, which made the southeast cold air invade China. Regarding S1‐type and S2‐type ECSs, the negative anomalies over Eurasia from day −6 to day −4 and the subsequent cyclone anomalies at 850 hPa accompanied by the southeastward extension of cold high led to ECSs.

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Regionality of record-breaking low temperature events in China and its associated circulation

Cited by 11 publications

References 28 publications

Observed changes in maximum and minimum temperatures in Xinjiang autonomous region, China

Observed changes in maximum and minimum temperatures in Xinjiang autonomous region, China

The Winter Concurrent Meridional Shift of the East Asian Jet Streams and the Associated Thermal Conditions

Sources and paths of extreme cold surges over China and their associated atmospheric circulations

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