Long-term trends in atmospheric rivers over East Asia

Liang, Jiale; Yong, Yangyang; Hawcroft, Matt

doi:10.1007/s00382-022-06339-5

Cited by 21 publications

(17 citation statements)

References 113 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results suggest a southward displacement of ARs over EA, similar to the conclusions of Liang et al. (2022) and Wang et al. (2022), but conversely, northward over the WNP.…”

Section: Resultssupporting

confidence: 89%

See 1 more Smart Citation

Recent Opposite Trends of Atmospheric Rivers Over East Asia and Western North Pacific Driven by the Pacific Decadal Oscillation

Huang,

Hua,

Zhong

et al. 2024

JGR Atmospheres

View full text Add to dashboard Cite

Atmospheric rivers (ARs) in East Asia have garnered increasing attention for their crucial roles in understanding extreme precipitation events and regional hydrological cycles. Here, we investigate the summer AR frequency over the East Asia‐western North Pacific region (EA‐WNP) during 1959–2022. Interestingly, the results show that the AR frequency over the two regions experienced opposite variations, with the boundary between them at around 135°–140°E. On interdecadal timescales, such variations are mainly synchronized with a zonal dipole pattern characterized by cyclonic (anticyclonic) anomalies centered to the northwest of Taiwan and anticyclonic (cyclonic) anomalies centered to the southeast of Japan. This interdecadal dipole pattern is induced by interdecadal changes in the western North Pacific subtropical high under different Pacific Decadal Oscillation (PDO) phases. Particularly, the internal variability accounts for about 77–90% of the observed trends in high response areas. The displacements of ARs are also consistent with the opposite trends of precipitation over EA‐WNP. ARs exert a dominant influence on the precipitation trend in the WNP region but a weaker contribution to the precipitation trend in the EA region, which reflects the different impacts of ARs on EA and WNP precipitation. These results indicate that the PDO has the potential for predicting EA‐WNP ARs on interdecadal timescales, and the opposite AR trends are crucial in understanding the complexity of precipitation over the EA‐WNP region.

show abstract

“…The results suggest a southward displacement of ARs over EA, similar to the conclusions of Liang et al. (2022) and Wang et al. (2022), but conversely, northward over the WNP.…”

Section: Resultssupporting

confidence: 89%

“…Regarding the trends of ARs in EA, Liang et al (2022) pointed out that, historically, ARs exhibit a southward shift due to the variations of boreal summer southwesterly monsoon flow. Similar results were also found by Wang et al (2022), who reported that there are more ARs in low latitudes but a decreased frequency in high latitudes over EA.…”

mentioning

confidence: 99%

Recent Opposite Trends of Atmospheric Rivers Over East Asia and Western North Pacific Driven by the Pacific Decadal Oscillation

Huang,

Hua,

Zhong

et al. 2024

JGR Atmospheres

View full text Add to dashboard Cite

show abstract

“…Therefore, we defined ARs west of 135°E as EA ARs and east of 135°E as WNP ARs. EA ARs show the same equatorward trend as the conclusion from(Liang et al, 2022), but WNP AR trend is poleward to the contrary. The opposite trends are also detected through verification from JRA-55 (FigureS1).Meanwhile, though different AR detection algorithms can influence the AR frequency, four methods in analysis all show similar trends pattern (Figures S2), which indicates that the ARs over EA-WNP do experience opposite trends in the past 40 years.Therefore, we select four 5° × 5° boxes: E1 (30°-35°N, 115°-120°E), E2 (20°-25°N, 120°-125°E), W1 (40°-45°N, 155°-160°E), and W2 (35°-40°N, 170°-175°E) to approximately represent the interdecadal variations of EA and WNP ARs (shown in Figure1b).…”

supporting

confidence: 55%

“…ARs are associated with EA summer monsoon and have the potential predictability of extreme precipitation over EA (Pan & Lu, 2020;Park et al, 2021;Wang et al, 2021). Concerning the AR trends in EA, Liang et al (2022) pointed out that the southward shift of historical ARs is related to the alteration of boreal summer southwesterly monsoon flow. However, AR is generally more than 2000 kilometers long and could be influenced by various systems, while EA ARs could always extend to Western North Pacific (WNP) region (Pan & Lu, 2020).…”

Section: Introductionmentioning

confidence: 99%

Opposite Interdecadal Trends of Summer Atmospheric Rivers over East Asia and Western North Pacific in Recent Decades

Huang

Hua

Zhong³

et al. 2022

Preprint

View full text Add to dashboard Cite

The summer atmospheric river (AR) frequency over East Asia and Western North Pacific (EA-WNP) is investigated by multiple AR detection algorithms based on the Atmospheric River Tracking Method Intercomparison Project (ARTMIP) Tier2 reanalysis dataset. The results show that AR frequency during the recent four decades experienced opposite interdecadal shifts, greatly contributing to the interdecadal equatorward trends of EA ARs and poleward trends of WNP ARs with a boundary around 135°E. The opposite variations are mainly influenced by a zonal dipole of integrated water vapor transport with cyclonic and anticyclonic anomalies centered over Taiwan and the ocean to the southeast of Japan, respectively. A major impact of the Pacific Decadal Oscillation and a reinforcement effect due to a zonal wave train from the North Atlantic jointly modulate the pattern. Considering ARs may curve their pathway over EA-WNP, the algorithms based on historical AR shapes should be cautiously used during AR detection.

show abstract

“…The northward or eastward wind at the west side of this anticyclone system can transport moisture from the tropics to East Asia, which dominating summer rainfall in these areas. This transportation of moisture is considered as the rain belt or the East Asia atmospheric river (Liang et al, 2022). During the month of May each year, the rain belt is mainly over the Huai River basin and the lower Yangtze River Basin in eastern China.…”

Section: Introductionmentioning

confidence: 99%

Three modes of the east Asia summer monsoon influencing Eastern China

Liu

Feng

2022

Preprint

View full text Add to dashboard Cite

East Asia Summer Monsoon (EASM) is the primary circulation affecting boreal summer precipitation in eastern China and is mainly dominated by the recession and extension of the Western Pacific Subtropical High (WPSH). Based on monthly datasets, previous studies have mainly focused on the intensity and variability of the WPSH, in order to obtain potential predictions of the EASM. Here, based on daily wind anomalies, in addition to the most common mode of WPSH, two additional modes are found in the summer circulation over China. The second mode (M2) seems irrelevant to the influence of WPSH over China. The positive phase of M2 favors precipitation in the areas south of the Yangtze River and the western Northeast China, but is unfavorable to precipitation in North China. M2 poses an India Ocean-East China (or west-east) dipole pattern. The positive phase of M2 seems associated with a strong, large, spatially continuous but southerly shifted subtropical high that connects the WPSH and the subtropical high over the India Peninsular/Indian Ocean, leading to a strong eastward wind flow from the northern India Ocean to the northwest Pacific. Accompanying with this large subtropical high system is a cyclonic circulation over the area of Southeastern China and the East China Sea. The positive phase of the third mode (M3) reflects a northward shifted WPSH, which favors precipitation in northern China and a small part of South China, but unfavorable to precipitation in the Yangtze River basin. M3 is associated with a strong south-north dipole structure of sea level pressure. The south side of this structure is over the Maritime Continent, and its north side is over the Asia continent, but the variation of sea level pressure over the Maritime Continent is small compared with that over the Asian continent and the western North Pacific, so this dipole structure can also be regarded as a uniform structure over the Asia continent. Comparatively, M3 has a more pronounced decreasing trend in the past decades, while M2 mainly poses decadal changes.

show abstract

Long-term trends in atmospheric rivers over East Asia

Cited by 21 publications

References 113 publications

Recent Opposite Trends of Atmospheric Rivers Over East Asia and Western North Pacific Driven by the Pacific Decadal Oscillation

Recent Opposite Trends of Atmospheric Rivers Over East Asia and Western North Pacific Driven by the Pacific Decadal Oscillation

Opposite Interdecadal Trends of Summer Atmospheric Rivers over East Asia and Western North Pacific in Recent Decades

Three modes of the east Asia summer monsoon influencing Eastern China

Contact Info

Product

Resources

About