Springtime extra‐tropical cyclones in Northeast Asia and their impacts on long‐term precipitation trends

Cho, Hyeong‐Oh; Son, Seok‐Woo; Park, Doo‐Sun R.

doi:10.1002/joc.5543

Cited by 10 publications

(9 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al (2009) reported that the ETC frequency and intensity were significantly decreased in the 40°-45°N latitude band during the last few decades. Chen et al (2014) and Cho et al (2018) also documented a weakening of wintertime ETCs in China and a decreasing number of springtime ETCs in southern China, respectively. In contrast, Iwao et al (2012) showed that the number of explosive cyclones has slightly increased in the east of Japan.…”

Section: Yoshida and Asuma 2004)mentioning

confidence: 91%

Extratropical cyclones over East Asia: climatology, seasonal cycle, and long-term trend

et al. 2019

Self Cite

View full text Add to dashboard Cite

Extratropical cyclones (ETCs) in East Asia are automatically detected and tracked by applying a Lagrangian tracking algorithm to the 850-hPa relative vorticity field. The ETC statistics, which are derived from ERA-Interim reanalysis dataset from 1979 to 2017, show that East Asian ETCs primarily form over Mongolia, East China, and the Kuroshio Current region with a maximum frequency of six to seven cyclones per month. Both Mongolia and East China ETCs are initiated on the leeward side of the mountains. While Mongolia ETCs downstream of the Altai-Sayan Mountains develop slowly, East China ETCs downstream of the Tibetan plateau develop rapidly as they travel across the warm ocean. Both of them show a maximum frequency and intensity in spring rather than in winter. In contrast, oceanic ETCs across the Kuroshio Current and the Kuroshio-Oyashio Extension, where sea surface temperature gradient is sharp, reach a maximum frequency in winter although their intensity is still maximum in spring. On the decadal timescale, both ETC frequency and intensity exhibit insignificant trends. Exceptions are springtime East China and summertime Mongolia ETCs whose frequencies have slightly decreased since 1979. This declining trend is consistent with the enhanced static stability in the region.

show abstract

Section: Yoshida and Asuma 2004)mentioning

confidence: 91%

Extratropical cyclones over East Asia: climatology, seasonal cycle, and long-term trend

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The subscripts denote 500, 700, and 850 hPa. Additionally, extratropical cyclones (ETCs) were also detected and tracked using 6-hourly 850-hPa relatively vorticity field as in Hoskins and Hodges (2002) and Cho et al (2018), which represented the changed synoptic circulation change. Briefly, the relative vorticity was first filtered at a T42 spectral resolution and the local maximum was tracked by considering its direction and speed.…”

Section: Atmospheric Circulation Modes and Indicesmentioning

confidence: 99%

“…The quasi-stationary thermal lows were then removed by considering sufficiently strong and migrating ETCs with a minimum intensity greater than 1.0 3 10 25 s 21 [or 1 cyclonic vorticity unit (CVU)], a lifetime longer than two days, and a traveled distance greater than 1000 km (Hoskins and Hodges 2002). Tropical cyclones were also excluded by discarding cyclones that originated below 258N; see Hoskins and Hodges (2002) and Cho et al (2018) for full details.…”

Section: Atmospheric Circulation Modes and Indicesmentioning

confidence: 99%

“…All ETC statistics were presented in a 1.58 gridcell resolution as in ERA-Interim with area smoothing. The ETC frequency and intensity at a given grid cell represented those within a 555-km radius (Grise et al 2013;Cho et al 2018). For instance, one cyclone at a grid cell does not indicate one cyclone at the specific grid cell, but represents one cyclone within a 555-km radius from the grid cell.…”

Section: Atmospheric Circulation Modes and Indicesmentioning

confidence: 99%

See 1 more Smart Citation

Variability of Daily Maximum Wind Speed across China, 1975–2016: An Examination of Likely Causes

et al. 2020

Self Cite

View full text Add to dashboard Cite

Assessing change in daily maximum wind speed and its likely causes is crucial for many applications such as wind power generation and wind disaster risk governance. Multidecadal variability of observed near-surface daily maximum wind speed (DMWS) from 778 stations over China is analyzed for 1975–2016. A robust homogenization protocol using the R package Climatol was applied to the DMWS observations. The homogenized dataset displayed a significant (p < 0.05) declining trend of −0.038 m s−1 decade−1 for all China annually, with decreases in winter (−0.355 m s−1 decade−1, p < 0.05) and autumn (−0.108 m s−1 decade−1; p < 0.05) and increases in summer (+0.272 m s−1 decade−1, p < 0.05) along with a weak recovery in spring (+0.032 m s−1 decade−1; p > 0.10); that is, DMWS declined during the cold semester (October–March) and increased during the warm semester (April–September). Correlation analysis of the Arctic Oscillation, the Southern Oscillation, and the west Pacific modes exhibited significant correlation with DMWS variability, unveiling their complementarity in modulating DMWS. Further, we explored potential physical processes relating to the atmospheric circulation changes and their impacts on DMWS and found that 1) overall weakened horizontal airflow [large-scale mean horizontal pressure gradient (from −0.24 to +0.02 hPa decade−1) and geostrophic wind speed (from −0.6 to +0.6 m s−1 decade−1)], 2) widely decreased atmospheric vertical momentum transport [atmospheric stratification thermal instability (from −3 to +1.5 decade−1) and vertical wind shear (from −0.4 to +0.2 m s−1 decade−1)], and 3) decreased extratropical cyclones frequency (from −0.3 to 0 month decade−1) are likely causes of DMWS change.

show abstract

“…It turns out that more than 32 ETCs pass through the Korean Peninsula in a year. They mostly initiate in the two cyclogenesis regions, i.e., one over Mongolia on the leeside of the Altai‐Sayan mountains and the other over central China on the leeside of Tibetan Plateau (Cho et al, ; Lee et al, ). Their trajectories are consistent with the East Asian storm track (Adachi & Kimura, ; Zhang et al, ).…”

Section: Methodsmentioning

confidence: 99%

The Rapid Intensification of East Asian Cyclones Around the Korean Peninsula and Their Surface Impacts

et al. 2020

Self Cite

View full text Add to dashboard Cite

The rapid intensification of extratropical cyclones (ETCs) around the Korean peninsula and their surface impacts are investigated by detecting and tracking ETCs in East Asia using ERA‐Interim data over the period of 1979–2017. The ETCs approaching the Korean peninsula, identified on the 850‐hPa relative vorticity field, are mainly initiated in the leeward side of the Altai‐Sayan Mountains and southern Tibetan Plateau, featuring northern and southern cyclone tracks, respectively. The northern‐track ETCs are typically accompanied by a developing upper‐level trough. In particular, those that intensify rapidly are characterized by a strong upper‐level potential vorticity (PV) anomaly related to the enhanced trough, with a rather weak influence of diabatic heating. This is in contrast with the southern‐track ETCs, which are primarily organized by a lower‐level PV anomaly produced by diabatic heating. The southern‐track ETCs rapidly intensify in the presence of a migrating upper‐level trough through the interaction of upper‐ and lower‐level PV anomalies. Although their intensification processes differ, surface winds reaching 10 m s−1 are observed with the rapid intensification of both northern‐ and southern‐track ETCs. The southern‐track ETCs, traveling across the East China Sea and the Yellow Sea, also result in substantial precipitation in Korea and Japan.

show abstract

Springtime extra‐tropical cyclones in Northeast Asia and their impacts on long‐term precipitation trends

Cited by 10 publications

References 48 publications

Extratropical cyclones over East Asia: climatology, seasonal cycle, and long-term trend

Extratropical cyclones over East Asia: climatology, seasonal cycle, and long-term trend

Variability of Daily Maximum Wind Speed across China, 1975–2016: An Examination of Likely Causes

The Rapid Intensification of East Asian Cyclones Around the Korean Peninsula and Their Surface Impacts

Contact Info

Product

Resources

About