Article
Meteorology & Atmospheric Sciences
Guang Yang, Tim Li
Summary: Unlike classic midlatitude dry baroclinic instability theory, atmospheric motions over the subtropical mei-yu front in boreal summer are dominated by synoptic-scale disturbances coupled with precipitation and moisture under a weaker background vertical shear. This moisture-precipitation-circulation interactive feature, along with a preferred zonal wavelength of about 3400 km and eastward phase propagation, is explained by a moist baroclinic instability theoretical framework.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Xuanyu Liu, Guixing Chen, Sijia Zhang, Yu Du
Summary: This study examines the diversity and formation processes of low-level jets (LLJs) over southern China. Based on observations and analysis, four types of LLJs were identified, and their formation is influenced by synoptic-scale disturbances and diurnal thermal forcings. These findings contribute to our understanding and prediction of LLJ formation.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Meteorology & Atmospheric Sciences
Xiaokang Wang, Renjun Zhou, Yi Deng, Chunguang Cui, Yang Hu, Jingyu Wang, Hua Liu
Summary: This article presents observational evidence of the symbiotic relationship between mei-yu rainfall and the morphology of the mei-yu front, illustrating how they influence each other through dynamical and thermodynamic feedbacks and evolve in cyclic behaviors.
JOURNAL OF HYDROMETEOROLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Lexi Henny, Chris D. Thorncroft, Huang-Hsiung Hsu, Lance F. Bosart
Summary: The study utilizes Taiwan Climate Change Projection Information and Adaptation Knowledge Platform (TCCIP) gridded precipitation data to investigate extreme precipitation (EP) days during the Mei-yu season. The EP days are classified into weather types based on the presence of tropical cyclones (TCs) and atmospheric rivers (ARs), and their frequency and synoptic changes are analyzed. The results show that EP days associated with ARs exhibit a significant increasing trend in season-total precipitation, while TC-related EP days contribute less precipitation due to decreased TC frequency. The combined trends of AR-related and TC-related events lead to EP increases in western Taiwan and decreases in eastern Taiwan. Southwesterly integrated vapor transport (IVT), wind speed, and specific humidity during the Mei-yu season have all increased, with low-level winds and increased moisture being the primary factors driving the IVT increase.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2023)
Article
Meteorology & Atmospheric Sciences
Caihong Liu, Chundi Hu, Song Yang, Lifei Lin, Zeming Wu
Summary: Extreme precipitation anomalies occurred in June and July 2020 in the East Asia-western Pacific region, resulting in catastrophic floods in the Yangtze River Valley and severe droughts in southern China and the Bay of Bengal-western North Pacific (BOB-WNP). The atmospheric circulation anomalies were characterized by the meridional shifts of the East Asian westerly jet (EAWJ) which were influenced by high-latitude Rossby wavetrains and a robust Pacific-Japan (PJ) wavetrain.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Chunguang Cui, Wen Zhou, Hao Yang, Xiaokang Wang, Yi Deng, Xiaofang Wang, Guirong Xu, Jingyu Wang
Summary: In this study, the characteristics and formation mechanisms of low-level jets (LLJs) in the middle reaches of the Yangtze River during the 2010 mei-yu season were analyzed using radiosonde data and reanalysis data. The vertical structure of LLJs was dominated by boundary layer jets (BLJs) at heights of 900-1200 m. Synoptic-system-related LLJs (SLLJs) occurred most frequently at 0800 LST and were strongest at 1100 LST. Both BLJs and SLLJs were characterized by a southwesterly wind direction, with SLLJs being more westerly and northeasterly SLLJs occurring more frequently than northeasterly BLJs. BLJs developed earlier than SLLJs.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Environmental Sciences
Mark R. Muetzelfeldt, Reinhard Schiemann, Andrew G. Turner, Pier Luigi Vidale, Arathy Menon
Summary: The Silk Road pattern (SRP) is analyzed on intraseasonal timescales over summer using empirical orthogonal functions (EOFs) of the meridional wind at 200 hPa. The first two principal components explain almost equal amounts of variance, hence both are required to represent the intraseasonal SRP. The oscillations are identified as plausibly being Rossby waves by means of waveguide theory.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Chao-An Chen, Huang-Hsiung Hsu, Hsin-Chien Liang, Ping-Gin Chiu, Chia-Ying Tu
Summary: This study evaluates the changes in extreme precipitation in the spring and Mei-yu seasons under global warming. The results show that extreme precipitation in the spring exhibits larger enhancements and a tendency of northward extension, while extreme precipitation in the Mei-yu season strengthens and becomes more frequent. These findings suggest that water resource management will face greater challenges in a warmer climate.
WEATHER AND CLIMATE EXTREMES
(2022)
Article
Meteorology & Atmospheric Sciences
Xiaowei Hong, Riyu Lu, Shuanglin Li
Summary: The study shows a significant interannual relationship between the meridional displacements of the upper-tropospheric westerly jet streams over West Asia and East Asia. The Silk Road pattern and precipitation anomalies in the tropical region are important factors affecting this relationship. Enhanced or suppressed tropical precipitation can induce a northward or southward displacement of the jet stream, contributing to the in-phase relationship between West Asia and East Asia.
JOURNAL OF CLIMATE
(2021)
Article
Multidisciplinary Sciences
Xiao-Qian Li, Xiao-Guo Xiang, Florian Jabbour, Oskar Hagen, Rosa del C. Ortiz, Pamela S. Soltis, Douglas E. Soltis, Wei Wang
Summary: This study assesses the temporal dynamics of biotic colonization in subtropical East Asian caves. It discovers that the majority of colonizations occurred after the Oligocene-Miocene boundary, and organisms from the surrounding forest were a major source of cave biodiversity. The colonization of these caves was influenced by large-scale seasonal climatic changes and evolution of local forests.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Engineering, Aerospace
Tzu-Yi Lien, Ta-Kang Yeh, Jing-Shan Hong, Tung -Yuan Hsiao
Summary: This study analyzes the long-term spatial-temporal changes in rainfall and perceptible water vapor (PWV) during the Mei-yu season from 2006 to 2019. The results show that the Mei-yu season has extended in recent years, with higher PWV in southern Taiwan and increased rainfall in the central and southern mountain regions.
ADVANCES IN SPACE RESEARCH
(2022)
Review
Environmental Sciences
Shuya Cao, Yi Wang, Guangxin He, Peifeng Shen, Yan He, Yue Wu
Summary: This paper comprehensively analyzed the formation and development process of two consecutive tornado events during the Mei-yu season using various data sources. The results showed that the tornadoes were triggered by small-scale vortices and the movement of a low vortex. The presence of wind shear and airflow convergence was observed during tornado occurrence. Additionally, the enhancement of low-level vertical wind shear and the timing of lightning activity were also related to tornado occurrence.
Article
Environmental Sciences
Yu Liu, Jianhui Wang, Guoqing Han, Xiayan Lin, Guijing Yang, Qiyan Ji
Summary: The East Greenland Polar Front (EGPF) is an important front in the Nordic Seas, and its variations are closely linked to sea ice melting and North Atlantic water recirculation. Analysis using global ocean reanalysis data reveals that the intensity and area of EGPF show significant seasonal and interannual variations, with an increasing trend in recent years.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Chao He
Summary: This study shows that the weakened southern branch westerly jet (SWJ) on the southern side of Tibetan Plateau plays a key role in suppressing subtropical East Asian precipitation. Global warming weakens the SWJ, which further acts to suppress precipitation by weakening the southwesterly wind and ascent. The observational constraint on the SWJ-precipitation relationship amplifies the projected drying trend and narrows the intermodel spread.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Xinyu Li, Riyu Lu, Gen Li
Summary: The study explores the circulation and precipitation anomalies associated with different configurations of the western North Pacific subtropical high (WNPSH) and the East Asian westerly jet (EAJ) in summer on interannual timescales. In-phase configuration shows a typical meridional teleconnection, leading to rainfall anomalies over the Yangtze River basin and south Japan, while out-of-phase configuration results in significant rainfall anomalies moving northward to North China and the northern Korean Peninsula. Additionally, the out-of-phase configuration is linked to the developing phase of ENSO and significant sea surface temperature anomalies in the tropical central and eastern Pacific.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)