Key Factors of the Strong Cold Wave Event in the Winter of 2020/21 and Its Effects on the Predictability in CMA-GEPS DOI Creative Commons
Pengfei Ren, Gao Li, Jiawen Zheng

и другие.

Atmosphere, Год журнала: 2023, Номер 14(3), С. 564 - 564

Опубликована: Март 16, 2023

During the 2020/2021 winter season, three nationwide cold waves took place from 28 to 31 December 2020, as well 5 8 January and 14 17 2021. These resulted in extreme weather northern eastern China. In this study, common features of these were analyzed, key factors contributing illustrated, performance CMA-GEPS numerical model was evaluated predicting cooling effect waves, its predictability source discussed. The results indicated that caused by synergistic effects mid- high-latitude atmospheric circulation both upper lower atmosphere, including polar vortex splitting, enhancement blocking high, increased meridional anomaly Siberian high area. time undergoing low-frequency adjustment, with Arctic oscillation continuously weakening, while gradually historically high-intensity states. outbreaks occurred at peak declining points respectively, acting short- medium-term forecast factors. demonstrated forecasting ability for due accurately predict evolution prior after wave a long lead time. Predictability analysis suggested strong variability (such blocking) events may benefit model’s prediction events. findings contribute understanding physical mechanisms behind potential improved

Язык: Английский

Extreme Cold Events in North America and Eurasia in November-December 2022: A Potential Vorticity Gradient Perspective DOI Open Access
Yao Yao,

Wenqin Zhuo,

Zhaohui Gong

и другие.

Advances in Atmospheric Sciences, Год журнала: 2023, Номер 40(6), С. 953 - 962

Опубликована: Фев. 9, 2023

Язык: Английский

Процитировано

53
Influence of Major Stratospheric Sudden Warming on the Unprecedented Cold Wave in East Asia in January 2021 DOI Creative Commons
Yingxian Zhang, Dong Si, Yihui Ding

и другие.

Advances in Atmospheric Sciences, Год журнала: 2022, Номер 39(4), С. 576 - 590

Опубликована: Фев. 21, 2022

Abstract An unprecedented cold wave intruded into East Asia in early January 2021 and led to record-breaking or historical extreme low temperatures over vast regions. This study shows that a major stratospheric sudden warming (SSW) event at the beginning of exerted an important influence on this wave. The SSW occurred 2 subsequently displacement polar vortex Asian side. Moreover, induced signal propagate downward mid-to-lower troposphere, which not only enhanced blocking Urals–Siberia region negative phase Arctic Oscillation, but also shifted tropospheric off pole. displaced vortex, Ural blocking, another downstream ridge western North America formed distinct inverted omega-shaped circulation pattern (IOCP) Asia–North Pacific sector. IOCP was most direct impactful atmospheric causing Asia. triggered meridional cell with upward branch Siberia. intensified Siberian high low-level northerly winds, favored invasion Hence, circulations such as IOCP, high, eastward propagation Rossby eventually outbreak 2021.

Язык: Английский

Процитировано

43
Impact of Pacific blocking on the intraseasonal winter sea ice seesaw between the Bering and Okhotsk Seas DOI
Yao Yao,

Wenqin Zhuo,

Dehai Luo

и другие.

Atmospheric Research, Год журнала: 2024, Номер 300, С. 107227 - 107227

Опубликована: Янв. 6, 2024

Язык: Английский

Процитировано

11
No detectable trend in mid-latitude cold extremes during the recent period of Arctic amplification DOI Creative Commons

Judah Cohen,

Laurie Agel, Mathew Barlow

и другие.

Communications Earth & Environment, Год журнала: 2023, Номер 4(1)

Опубликована: Сен. 28, 2023

Abstract It is widely accepted that Arctic amplification—accelerated warming—will increasingly moderate cold air outbreaks to the mid-latitudes. Yet, an increasing number of recent studies also argue amplification can contribute more severe winter weather. Here we show temperature extremes across United States east Rockies, Northeast Asia and Europe have remained nearly constant over decades, in clear contrast a robust warming trend. Analysis trends frequency magnitude mixed US but with clearer decreasing trend occurrence Europe, especially Southern Europe. This divergence between no detectable mid-latitude highlights need for better understanding physical links extremes.

Язык: Английский

Процитировано

22
Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia DOI
Yuanyuan Song, Yao Yao, Dehai Luo

и другие.

Atmospheric Research, Год журнала: 2023, Номер 295, С. 107038 - 107038

Опубликована: Сен. 29, 2023

Язык: Английский

Процитировано

16
The key atmospheric drivers linking regional Arctic amplification with East Asian cold extremes DOI

Wenqin Zhuo,

Yao Yao, Dehai Luo

и другие.

Atmospheric Research, Год журнала: 2022, Номер 283, С. 106557 - 106557

Опубликована: Дек. 5, 2022

Язык: Английский

Процитировано

20
Impacts of stratospheric polar vortex changes on tropospheric blockings over the Atlantic region DOI
Chongyang Zhang, Jiankai Zhang,

Xufan Xia

и другие.

Climate Dynamics, Год журнала: 2024, Номер 62(6), С. 4829 - 4848

Опубликована: Фев. 3, 2024

Язык: Английский

Процитировано

4
Amundsen Sea Ice Loss Contributes to Australian Wildfires DOI
Guanyu Liu, Jing Li, Ying Tong

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 58(15), С. 6716 - 6724

Опубликована: Апрель 4, 2024

Wildfires in Australia have attracted extensive attention recent years, especially for the devastating 2019–2020 fire season. Remote forcing, such as those from tropical oceans, plays an important role driving abnormal weather conditions associated with wildfires. However, whether high latitude climate change can impact Australian fires is largely unclear. In this study, we reveal a robust relationship between Antarctic sea ice concentration (SIC), primarily over Amundsen Sea region, springtime activity, by using reanalysis data sets, AMIP simulation results, and state-of-the-art model simulation. Specifically, diminished SIC leads to formation of high-pressure system above result eastward propagation Rossby waves. Meanwhile, two strengthened meridional cells originating tropic polar regions also enhance subsiding airflow Australia, resulting prolonged arid high-temperature conditions. This mechanism explains about 28% variability contributed more than 40% 2019 extreme burning event, eastern hotspots. These findings contribute our understanding polar-low teleconnection implications projecting well global environment.

Язык: Английский

Процитировано

4
Influence of high-latitude blocking and the northern stratospheric polar vortex on cold-air outbreaks under Arctic amplification of global warming DOI Creative Commons
Edward Hanna, Jennifer A. Francis, Muyin Wang

и другие.

Environmental Research Climate, Год журнала: 2024, Номер 3(4), С. 042004 - 042004

Опубликована: Ноя. 18, 2024

Abstract It is widely accepted that Arctic amplification (AA)—enhanced warming relative to global warming—will increasingly moderate cold-air outbreaks (CAOs) the midlatitudes. Yet, some recent studies also argue AA over last three decades rest of present century may contribute more frequent severe winter weather including disruptive cold spells. To prepare society for future extremes, it necessary resolve whether and midlatitude are coincidental or physically linked. Severe events in northern continents often related a range stratospheric polar vortex (SPV) configurations atmospheric blocking, but these dynamical drivers complex still not fully understood. Here we review research advances paradigms nonlinear theory blocking helps explain location, timing duration AA/midlatitude connections, vortex’s zonal asymmetric intra-seasonal variations, its southward migration continents, surface impacts. We highlight novel understanding SPV variability—polar stretching stratosphere–troposphere oscillation—that have remained mostly hidden predominant focus on sudden warmings. A physical explanation two-way vertical coupling process between highs, taking into account local conditions, remains elusive. conclude evidence exists tropical preconditioning Arctic-midlatitude climate linkages. Recent using very large-ensemble modelling provides an emerging opportunity robustly quantify internal variability when studying potential response CAOs sea-ice loss.

Язык: Английский

Процитировано

4
Assessment of the hazard of extreme low-temperature events over China in 2021 DOI Creative Commons
Yingxian Zhang, Guofu Wang

Advances in Climate Change Research, Год журнала: 2022, Номер 13(6), С. 811 - 818

Опубликована: Ноя. 18, 2022

In January 2021, an impressive extreme low-temperature event (ELTE) occurred in China, bringing record-breaking low temperatures to some regions. The comprehensive hazard and the overall situation of ELTEs whole 2021 are still unclear. Accordingly, overview over mainland their hazards were systematically reviewed comprehensively evaluated by using improved identification assessment method, which can objectively determine levels distinguish spatial differences a single event. A total 20 2021; intensity was remarkably higher than climatology, while impacted area duration lower or near indicating normal hazard. general, losses related disasters relatively less average loss past ten years, is likely proportion higher-than-moderately events year. had large impacts on Northwest, North Northeast China small southeastern Qinghai–Tibet Plateau western parts Southwest China. Winter autumn higher-than-normal index for due two high-hazard early-to-mid November, respectively. These showed different impacts. former mainly affected central eastern However, latter mostly attacked especially resulting Xinjiang.

Язык: Английский

Процитировано

16