scholarly journals Characteristics of Polarimetric Radar Variables in Three Types of Rainfalls in a Baiu Front Event over the East China Sea

2009 ◽  
Vol 87 (5) ◽  
pp. 865-875 ◽  
Author(s):  
Yukari SHUSSE ◽  
Katsuhiro NAKAGAWA ◽  
Nobuhiro TAKAHASHI ◽  
Shinsuke SATOH ◽  
Toshio IGUCHI
Keyword(s):  
East China Sea ◽  
East China ◽  
Polarimetric Radar ◽  
The East China Sea ◽  
China Sea ◽  
Baiu Front

scholarly journals Polarimetric Radar Observation of the Melting Layer in a Convective Rainfall System during the Rainy Season over the East China Sea

2011 ◽  
Vol 50 (2) ◽  
pp. 354-367 ◽  
Author(s):  
Yukari Shusse ◽  
Nobuhiro Takahashi ◽  
Katsuhiro Nakagawa ◽  
Shinsuke Satoh ◽  
Toshio Iguchi
Keyword(s):  
East China Sea ◽  
East China ◽  
Polarimetric Radar ◽  
The East China Sea ◽  
Convective Rainfall ◽  
China Sea ◽  
Stratiform Region ◽  
Convective Region ◽  
Rainfall Type ◽  
Type Classification

Abstract During the rainy season over the East China Sea, convective rainfalls often show melting layer (ML) characteristics in polarimetric radar variables. In this research, the appearance ratio of the ML (the ratio of rainfall area accompanied by polarimetric ML signatures) and the variation in height of the level of the ML signature maximum (MLSM level; defined by the level of the ρhv minimum in the ML) in a convective rainfall region in a rainfall system over the East China Sea observed on 2 June 2006 were studied using C-band polarimetric radar (COBRA). For this analysis, a method of rainfall type classification that evaluates the presence of an ML in addition to providing conventional convective–stratiform classification using range–height indicator (RHI) observation data was developed. This rainfall type classification includes two steps: conventional convective–stratiform separation using the horizontal distribution of Zh at 2-km altitude, and ML detection using the vertical profile of ρhv at each horizontal grid point. Using a combination of these two classifications, the following four rainfall types were identified: 1) convective rainfall with an ML, 2) convective rainfall with no ML, 3) stratiform rainfall with an ML, and 4) stratiform rainfall with no ML. An ML was detected in 53.9% of the convective region in the rainfall system. Using the same definition, an ML was detected in 83.1% of the stratiform region. The ML in the convective region showed a marked decrease in ρhv coincident with an increase in ZDR around the ambient 0°C level, as did that in the stratiform region. Melting aggregated snow was the likely cause of the ML signature in the convective region. The average height of the MLSM level in the convective region was 4.64 km, which is 0.46 km higher than that in the stratiform region (4.18 km) and 0.27 km higher than the ambient 0°C level (4.37 km).

Mesoscale Precipitation Systems Along the Meiyu/Baiu Front and Future Expectation for Research Radar and Weather Radar Network

2008 ◽  
Vol 3 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Hiroshi Uyeda ◽  
Keyword(s):  
East Asia ◽  
East China Sea ◽  
Field Experiments ◽  
Research Collaboration ◽  
Doppler Radar ◽  
Global Climate ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Baiu Front

Field experiments on precipitation systems in East Asia are a key to better understanding global climate change, to uncovering weather phenomena related to meteorological disasters in the region, and to improving quantitative precipitation estimation (QPE) and quantitative precipitation forecasting (QPF). Observations with Doppler radar and radiosonde have clarified the structure of Meiyu/Baiu frontal precipitation systems and Typhoon rainbands. The Hydroshperic Atmospheric Research Center (HyARC) of Nagoya University has conducted field experiments on precipitation systems over the Yangtze River and East China Sea using dual Doppler radar observation on convective systems around the Meiyu front and aircraft observation with dropsonde on Baiu frontal precipitation systems. These studies are revealing characteristics of precipitation systems over the East China Sea and in East Asia. Precipitation clouds form dramatically rapidly in the moist environment, and precipitation systems developing south of the Baiu front play an important role on the formation of heavy rainfalls along the west coast of Kyushu, Japan. We discuss 1) the results of recent field experiments on precipitation systems over the East China Sea, 2) observation networks and preparation of new observation tools, 3) the development of a cloud resolving model to simulate precipitation systems, and 4) new research collaboration in East Asia.

The East China Sea Seafloor Observatory and its upgraded project

2011 ◽  
Author(s):  
Huiping Xu ◽  
Changwei Xu ◽  
Rufu Qin ◽  
Yang Yu ◽  
Shangqin Luo ◽  
...  
Keyword(s):  
East China Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Seafloor Observatory

Morphological and Phylogenetic Analysis of Karlodinium veneficum Isolated from the East China Sea in China

2011 ◽  
Vol 46 (2) ◽  
pp. 179-188 ◽  
Author(s):  
Wang Hongxia ◽  
Lu Douding ◽  
Huang Haiyan ◽  
Dai Xinfeng ◽  
Xia Ping
Keyword(s):  
Phylogenetic Analysis ◽  
East China Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Karlodinium Veneficum
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