Recent Advances in Understanding Multi-scale Climate Variability of the Asian Monsoon

Advances in Atmospheric Sciences, Год журнала: 2023, Номер 40(8), С. 1429 - 1456

Опубликована: Май 20, 2023

Язык: Английский

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Northeast Pacific warm blobs sustained via extratropical atmospheric teleconnections

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 2, 2024

Large-scale marine heatwaves in the Northeast Pacific (NEP), identified here and previously as 'warm blobs', have devastating impacts on regional ecosystems. An anomalous atmospheric ridge over NEP is known to be crucial for maintaining these warm blobs, also causing abnormally cold temperatures North America during season. Previous studies linked this teleconnections from tropical sea surface temperature anomalies. However, it was unclear whether extratropics could contribute ridge. Here we show that planetary wave trains, triggered by increased rainfall latent heat release Mediterranean Sea accompanied decreased Atlantic, can transport energy NEP, guided westerly jet, induce a quasi-barotropic there. Our findings provide insights into extratropical sustaining ridge, offering source of potential predictability blobs fluctuations America.

Язык: Английский

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The combined impact of subtropical wave train and Polar−Eurasian teleconnection on the extreme cold event over North China in January 2021

Climate Dynamics, Год журнала: 2022, Номер 60(11-12), С. 3339 - 3352

Опубликована: Сен. 30, 2022

Язык: Английский

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Two contrasting tropical convection modes from the eastern Pacific to northern Africa that drive Eurasian teleconnections in boreal summer

npj Climate and Atmospheric Science, Год журнала: 2025, Номер 8(1)

Опубликована: Фев. 18, 2025

Язык: Английский

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Linking the subseasonal variability of the East Asia winter monsoon and the Madden-Julian Oscillation through wave disturbances along the subtropical jet

npj Climate and Atmospheric Science, Год журнала: 2025, Номер 8(1)

Опубликована: Май 16, 2025

Язык: Английский

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Key Role of Arctic Sea‐Ice in Subseasonal Reversal of Early and Late Winter PM _2.5 Concentration Anomalies Over the North China Plain

Geophysical Research Letters, Год журнала: 2023, Номер 50(4)

Опубликована: Фев. 24, 2023

Abstract The PM 2.5 (fine particulate matter with diameter ≤2.5 μm) concentration anomalies over the North China Plain (NCP) in early and late winter sometimes show a subseasonal reversal, which brings great challenge for precise control of air pollution, mechanisms are not well understood. This paper reveals key role Barents Sea sea‐ice this reversal. In winter, negative Scandinavian‐like pattern causes an anticyclonic anomaly Northeast Asia thus leads to positive NCP. addition, anomalous warm advection associated Atlantic Oscillation‐like accelerates loss Sea, especially increases surface turbulent heating flux. These Polar/Eurasian‐like that induces cyclonic eventually NCP winter. Vice versa.

Язык: Английский

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Synergistic Effect of El Niño and Arctic Sea‐Ice Increment on Wintertime Northeast Asian Anomalous Anticyclone and Its Corresponding PM_2.5 Pollution

Journal of Geophysical Research Atmospheres, Год журнала: 2023, Номер 128(6)

Опубликована: Март 7, 2023

Abstract PM 2.5 pollution frequently occurs over the North China Plain (NCP) during early winter, which is usually modulated by northeast Asian anomalous anticyclone (NAAA). Research into NAAA and related has mainly focused on individual impact of El Niño or Arctic sea ice, with less analysis their synergistic effect. This study finds that October Barents–Kara Seas ice winter synergistically exert distinct remote influence via propagation Rossby waves finally deteriorate air quality NCP. More specifically, more Barents‐Kara in tends to cause a cooling there November, stimulates wave train thus strengthens NAAA. As result, weakened ventilation conditions stagnant support Further results reveal if are at same time, probability strong 57% associated NCP 43%, than only (0%) (14%). Considering key role NCP, we therefore construct simple linear model can skillfully predict lead time 1 month, shows good performance correlation coefficient up 0.61 raw

Язык: Английский

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Recent progress in understanding the interaction between ENSO and the East Asian winter monsoon: A review

Frontiers in Earth Science, Год журнала: 2023, Номер 11

Опубликована: Янв. 20, 2023

This paper reviews recent advances in understanding the interaction between East Asian winter monsoon (EAWM) and El Niño-Southern Oscillation (ENSO). The achievements are summarized into two aspects: 1) impacts of ENSO on EAWM, 2) effects EAWM ENSO. For first aspect, results show that: current climate model simulations have a common weaker bias than observations; influence central Pacific type is generally that eastern ENSO; precipitation anomalies tropical Indian Ocean tend to contribute intra-seasonal transition teleconnection over Asia; ENSO-EAWM relationship unstable subject non-linear modulation by state oceans extratropical atmospheric phenomena, which include Decadal Arctic Oscillation. Regarding second studies shown “pure” (denoted as res ), independent signal, can lead significant variations convection western Pacific, local Hadley circulation Asia, Walker equatorial latitudes; CMIP6 models preproduce above well, although with some bias. changes zonal flow associated modulating effect North America. A strong Australian summer coherently provide favorable conditions for onset Niño.

Язык: Английский

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Summer long-lived heatwaves in Northeast Asia promote heavy precipitation in South China

Atmospheric Research, Год журнала: 2024, Номер 300, С. 107244 - 107244

Опубликована: Янв. 10, 2024

Heatwaves interact with various extreme weather events, amplifying their impacts beyond the risks associated high temperatures alone. However, previous research has often overlooked extent to which heatwaves influence regions origin. In this study, we introduce a classification of in Northeast Asia, distinguishing between long-lived (LHWs) lasting five days or more and short-lived (SHWs) less than days. The study highlights significant role LHWs triggering heavy precipitation South China. anticyclonic anomalies are influenced by slow-moving wave train, initiating sustaining cyclonic over China, resulting upward airflow anomalies. Additionally, easterly wind southern region facilitate moisture transport creating favorable conditions for precipitation. findings underscore that could account noticeable portion (17.6%) total summer LHWs-related circulations

Язык: Английский

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Variations and possible causes of the December PM2.5 in Eastern China during 2000–2020

Frontiers in Environmental Science, Год журнала: 2023, Номер 11

Опубликована: Фев. 8, 2023

High air pollutions of PM 2.5 concentrations have become a serious environmental problem in China during recent decades, causing significant influences on urban quality and human health. In the study, we investigate variations December Eastern possible causes 2000–2020. The empirical orthogonal function (EOF) analysis is employed to reveal dominant patterns variability China. EOF1 shows consistent whole China, which reflects emission pattern past two decades. EOF2 exhibits North-South dipole pattern, closely tied changes atmospheric circulations. increase North mainly related decrease wind speed, boundary layer height inversion temperature, while South affected by local precipitation. Two wave trains are identified that affect distribution southern one ENSO, northern jointly sea surface temperature Labrador Sea ice concentration near Kara Sea. Finally, reconstructed comprehensive external forcing index based these factors. We find can well reproduce indicating plausible effects forcings prediction potential for

Язык: Английский

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