Atmospheric circulation anomaly over mid- and high-latitudes and its association with severe persistent haze events in Beijing

Hua, Wenli; Wu, Bingyi

doi:10.1016/j.atmosres.2022.106315

Cited by 9 publications

(4 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4a, for Type I, NCP is located westward of the intense anticyclonic anomalies center, conducive to accumulation of PM2.5 concentrations therein through inducing relatively stagnant weather conditions (Wang et al, 2020;Zhong et al, 2019). Based on observations during 2009-2020 as mentioned in Hua and Wu (2022), the negative-positive height anomalies could be regarded as a reliable signal for wintertime haze occurrence in Beijing. On day 2 and 3, the high-pressure system center retreat eastward, and a triple feature emerges, with positive-negative-positive in northern of China from west to east, and the middle lowpressure system favors the air transport from North China Plain, eventually form the high PM2.5 in SWLY and YRD.…”

Section: The Seesaw Effect Between Ncp and Yrd On Pm25 In Swlymentioning

confidence: 97%

“…Comparably, focusing an episodic events during October 29 to November 6, 2015 over NCP, Zhang et al (2021b) found that transport from the south could account for up to 70% of PM2.5 concentrations over this area. There is a tight relationship between surface PM2.5 concentration and upper-level large scale circulations (e.g., 500 hPa) in eastern China (Hua and Wu, 2022;. To this end, we composite the anomalous 500 hPa geopotential height and wind vector during Type I and II events.…”

Section: The Seesaw Effect Between Ncp and Yrd On Pm25 In Swlymentioning

confidence: 99%

See 1 more Smart Citation

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

Yan,

Su,

Cheng

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. PM2.5 pollution is a major air quality issue deteriorating human health, and numerous studies focus on PM2.5 pollution in major regions such as North China Plain (NCP) and Yangtze River Delta (YRD). However, the characteristics of PM2.5 concentrations and the associated formation mechanism in the transport corridor (referred to as SWLY) between NCP and YRD are largely ignored. Based on observational data, we find the number of PM2.5 pollution events in SWLY is comparable to that in NCP, far exceeding those in YRD, indicative of the severity of air pollution over this area. Utilizing a regional climate and air quality model, we isolate the effect of seesaw transport events, e.g., transport between NCP and YRD, as well as the atmospheric stagnation on the accumulation of PM2.5 over SWLY. Specifically, seesaw events and stagnation, comparable to each other, collectively account for an average of 67 % pollution days with PM2.5 exceeding 75 µg/m3, and this fraction (85 %) is even larger for severe haze events with PM2.5 exceeding 150 µg/m3. Furthermore, the connection between seesaw transport and large-scale circulation is examined. The trans-regional transport of pollutants from NCP to YRD (YRD to NCP) is likely stimulated by positive (negative) to negative (positive) geopotential height anomaly at 500 hPa located in northern China. The health effect due to short-term PM2.5 exposure induced by the trans-regional transport and stagnation is investigated, yielding a total of 8,634 (95 % CI: 6,023–11,223) and 9,496 (95 % CI: 6,552–12,413) premature deaths respectively in SWLY during winter 2014–2019, as high as 9 % of the total premature deaths in China although the area coverage of SWLY is within 1 %. While atmospheric stagnation is in general projected to occur more frequently under a warming climate, this study indicates the importance of regional emission control to alleviate PM2.5 pollution from seesaw transport and stagnation.

show abstract

Section: The Seesaw Effect Between Ncp and Yrd On Pm25 In Swlymentioning

confidence: 97%

Section: The Seesaw Effect Between Ncp and Yrd On Pm25 In Swlymentioning

confidence: 99%

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

Yan,

Su,

Cheng

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Meteorological conditions play a key role in air pollution, adverse local diffusion conditions such as weak surface winds, high relative humidity and temperature inversion contribute to heavy haze in China (Liu et al., 2020; Meng et al., 2019), and synoptic‐scale atmospheric circulation anomalies are related closely to these adverse conditions (An et al., 2022; Hua & Wu, 2022; Zhong et al., 2019). Synoptic patterns can represent a particular range of meteorological conditions, which have important impacts on spatial and temporal distribution of PM 2.5 , thus weather classification is taken as a useful tool to clarify the impacts of synoptic meteorological conditions on PM 2.5 levels at a regional scale.…”

Section: Introductionmentioning

confidence: 99%

“…, and synoptic-scale atmospheric circulation anomalies are related closely to these adverse conditions (An et al, 2022;Hua & Wu, 2022;Zhong et al, 2019). Synoptic patterns can represent a particular range of meteorological conditions, which have important impacts on spatial and temporal distribution of PM 2.5 , thus weather classification is taken as a useful tool to clarify the impacts of synoptic meteorological conditions on PM 2.5 levels at a regional scale.…”

mentioning

confidence: 99%

The 10‐ to 30‐Day Intraseasonal Weather Process Associated With Wintertime PM_2.5 Pollution in Eastern China

Liu,

Zhang,

Liu

et al. 2023

JGR Atmospheres

View full text Add to dashboard Cite

Severe PM2.5 pollution strikes winter eastern China, while its physical process associated with the atmospheric evolution from several days to weeks is not clear. This study uses weather types as intermediate agents between large‐scale atmospheric circulation and regional air pollution, to explore the whole circulation evolutionary chain related to wintertime PM2.5 pollution in eastern China. We extract objectively 6 weather types (WTs) for wintertime surface synoptic patterns in eastern China and analyze quantitatively the impacts of WTs on PM2.5 pollution. Then the preferred transitions between WTs are explored to explain potential weather process. We find a most frequently recurring circulation evolution corresponding to Mongolia high pressure that stretches southward to eastern China, referred as the WTs transition of YSH− > BLH− > MH, with PM2.5 increased in North China and dissipated as the high pressure moves southward. Further to establish intraseasonal connections between large‐scale circulation and regional synoptic patterns, several leading evolutionary chains are discovered among tropical Madden‐Julian Oscillation (MJO), extratropical teleconnections, and WTs of eastern China at an extended period. The positive or negative phase of teleconnections can indicate the WTs change 4–10 days in advance, while MJO further extends that indicative effect to 10–15 days. The intraseasonal oscillations of teleconnections such as conventional Eurasia, Scandinavia, Arctic Oscillation, Polar/Eurasia, Western Pacific and East Atlantic are associated with the transition of YSH− > BLH− > MH, and MJO may act as a precursor of teleconnection phases to extend effectively the prediction time for surface weather conditions and air pollution in eastern China.

show abstract

Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

Yang,

Liu,

Zhu

et al. 2023

Clim Dyn

View full text Add to dashboard Cite

Atmospheric circulation anomaly over mid- and high-latitudes and its association with severe persistent haze events in Beijing

Cited by 9 publications

References 88 publications

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

The 10‐ to 30‐Day Intraseasonal Weather Process Associated With Wintertime PM_2.5 Pollution in Eastern China

Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

Contact Info

Product

Resources

About

Atmospheric circulation anomaly over mid- and high-latitudes and its association with severe persistent haze events in Beijing

Cited by 9 publications

References 88 publications

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

Frequent haze events associated with transport and stagnation over the corridor between North China Plain and Yangtze River Delta

The 10‐ to 30‐Day Intraseasonal Weather Process Associated With Wintertime PM2.5 Pollution in Eastern China

Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

Contact Info

Product

Resources

About

The 10‐ to 30‐Day Intraseasonal Weather Process Associated With Wintertime PM_2.5 Pollution in Eastern China