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MOISTURE TRANSPORT PATHS AND SOURCES OF SOUTH CHINA ANNUALLY FIRST rainy SEASON AND THEIR RELATIONSHIP WITH THE ONSET OF THE SOUTH CHINA SEA SUMMER MONSOON

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Journal of Tropical Meteorology 2019年第2期25卷 171-179页

作者： LI Xiao-fan JIANG Zhi-hong SHI Yi Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Hebei Climate Center Hebei Provincial Key Laboratory for Meteorology and Eco-environment Meteorological Institute of Hebei Province

This study simulated the moisture transport process of southern China annually first rainy season(SCAFRS)using a Lagrangian airflow trajectory model(Hybrid Single Particle Lagrangian Integrated Trajectory: HYSPLIT), to determine SCAFRS moisture transport characteristics and their relationship with South China Sea summer monsoon(SCSSM). It is found that the moisture transport paths and sources of SCAFRS are closely related to the onset of SCSSM. Divided by SCSSM onset dates, the moisture transport characteristics of SCAFRS are compared *** the onset of SCSSM, precipitation of SCAFRS mainly comes from western Pacific and eastern China. Their contributions are 24% and 25%, respectively. The amount of water vapor carried along the path coming from Bay of Bengal-South China Sea(BSC) is relatively high, but the contribution rate of this path to SCAFRS precipitation is relatively low. Mainly due to strong precipitation over Bay of Bengal before the onset of SCSSM, this region is a moisture sink, which makes most moisture deposit in this region and only a small portion of water vapor transported to southern China. After the onset of SCSSM, most water vapor is transported to southern China by the southwesterly paths. The Indian Ocean is the main moisture source, which contributes almost 25% to SCAFRS precipitation. The contributions of moisture originating from BSC and eastern China to southern China precipitation after the onset of SCSSM are 21% and 18%, respectively.

关键词： moisture transport Lagrangian method southern China annually first rainy season onset of the South China Sea summer monsoon

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APPLICATION EXPERIMENT OF ASSIMILATING RADAR-RETRIEVED WATER VAPOR IN SHORT-RANGE FORECAST OF RAINFALL IN THE ANNUALLY FIRST rainy SEASON OVER SOUTH CHINA

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Journal of Tropical Meteorology 2016年第4期22卷 578-588页

作者：张诚忠陈子通万齐林林振敏黄燕燕戴光丰丁伟钰 Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction CMA Guangxi Region Meteorological Observatory

A scheme of assimilating radar-retrieved water vapor is adopted to improve the quality of NWP initial field for improvement of the accuracy of short-range precipitation prediction. To reveal the impact of the assimilation of radar-retrieved water vapor on short-term precipitation forecast, three parallel experiments, cold start, hot start and hot start plus the assimilation of radar-retrieved water vapor, are designed to simulate the 31 days of May, 2013 with a fine numerical model for South China. Furthermore, a case of heavy rain that occurred from 8-9 May 2013 over the region from the southwest of Guangdong province to Pearl River Delta is analyzed in detail. Results show that the cold start experiment is not conducive to precipitation 12 hours ahead; the hot start experiment is able to reproduce well the first6 hours of precipitation, but badly for subsequent prediction; the experiment of assimilating radar-retrieved water vapor is not only able to simulate well the precipitation 6 hours ahead, but also able to correctly predict the evolution of rain bands from 6 to 12 hours in advance.

关键词： radar-retrieved water vapor rainfall in annually first rainy season short-range forecast data assimilation

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INFLUENCES OF LOW-FREQUENCY MOISTURE TRANSPORTATION ON LOW FREQUENCY PRECIPITATION ANOMALIES IN THE ANNUALLY FIRST rainy SEASON OF SOUTH CHINA IN 2010

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Journal of Tropical Meteorology 2016年第S1期22卷 46-56页

作者：李丽平许冠宇倪碧柳艳菊 Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and Technology Wuhan Central Meteorological Observatory National Climate Center

85-station daily precipitation data from 1961-2010 provided by the National Meteorological Information Center and the NCEP/NCAR 2010 daily reanalysis data are used to investigate the low-frequency variability on the precipitation of the first rain season and its relationships with moisture transport in South China,and channels of low-frequency water vapor transport and sources of low-frequency precipitation are *** annually first raining season precipitation in 2010 is mainly controlled by 10-20 d and 30-60 d *** rainfall is more(interrupted) when the two low-frequency components are in the same peak(valley) phase,and the rainfall is less when they are superposed in the inverse *** 10-20 d low-frequency component of the moisture transport is more active than the 30-60 ***10-20 d water vapor sources lie in the South India Ocean near 30° S,the area between Sumatra and Kalimantan Island(the southwest source),and the equatorial middle Pacific region(the southeast source),and there are corresponding southwest and southeast moisture transport *** using the characteristics of 10-20 d water vapor transport anomalous circulation,the corresponding low-frequency precipitation can be predicted 6 d ahead.

关键词： low-frequency precipitation characteristics wavelet analysis low-frequency vapor sources annually annually first rainy season of South China

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SSTA SIGNAL CHARACTERISTIC ANALYSIS OVER THE INDIAN OCEAN DURING rainy SEASON IN CHINA

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Journal of Tropical Meteorology 2001年第2期7卷 122-130页

作者：晏红明严华生谢应齐 Meteorological Observatory of Yunnan province Department of Earth Science Yunnan University

The teleconnection distribution characteristics of sea surface temperature (SST) over the India Ocean and the precipitation during rainy season in China were studied by using the methods of EOF and CCA. The results indicate that the change of SST field will affect the change of rain belt during rainy seasons in China, and greatly affect the precipitation in northwest and southwest China, the Yangzi and Yellow River downstream basins. Strong signal phenomena of SSTA over India Ocean were revealed that showed the anoma-lous distribution of drought and flood in China. It shows that the precipitation during rainy seasons in China may be forecast by analyzing SST distribution characteristics over the India Ocean.

关键词： precipitation in China’s rainy season SSTA canonical correlation analysis signal characteristics

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Interannual Variation of the Onset of Yunnan’s rainy Season and Its Relationships with the Arctic Oscillation of the Preceding Winter

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Atmospheric and Climate Sciences 2017年第2期7卷 210-222页

作者： Yan Chen Shichang Guo Yu Liu Jianhua Ju Juzhang Ren Yunnan Institute of Meteorological Sciences Kunming China Department of Atmospheric Sciences Yunnan University Kunming China Yunnan Climate Center Kunming China

Based on an analysis of the circulation in May associated with the interannual variation of the onset of Yunnan’s rainy season, this study examined the rela-tionship between Arctic Oscillation (AO) and the onset timing of the rainy sea-son by using the NCEP/NCAR reanalysis and observational precipitation data for 1961-2010. The results indicated that, on an interannual time scale, intense Asian summer monsoon and an active EU-pattern wave train circulation in its positive phase, associated with a cold cyclonic cell covering the western part of the East Asian subtropical westerly jet (EASWJ), jointly contributed to the onset of the rainy season in May. Otherwise, the onset might be suppressed. The cold cyclonic cell over East Asia likely led to the southward shift and enhancement of EASWJ as well as its secondary circulation around the jet entrance, which could provide a favorable dynamic and thermal condition for rainfalls in Yunnan as was revealed in previous studies on 10 - 30-day time scale. Further examination showed that the preceding wintertime AO played a significant role in the timing of the onset of the rainy season before the mid-1980s’ by mostly modulating the wave-train-like circulation over East Asia in May. During that time period, when the AO index of the previous winter was positive (negative), Yunnan’s rainy season tended to begin earlier (later) than normal. Correspond-ingly, the precipitation in May was also closely linked to wintertime AO.

关键词： Onset of Yunnan’s rainy Season East Asian Subtropical Westerly Jet (EASWJ) Arctic Oscillation (AO) Interannual Variation

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Diversity of Cultivable Actinomycetes in Tropical rainy Forest of Xishuangbanna, China

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Open Journal of Soil Science 2013年第1期3卷 9-14页

作者： Yi Jiang Xiu Chen Yanru Cao Zhen Ren Kunming University Kunming China. Yunnan Institute of Microbiology Yunnan University Kunming China

In order to obtain much more un-known actinomycetes for discovering new drug lead, one hundred soil samples were collected from five national natural protection areas of tropical rain forests, Mengla, Menglun, Mandian, Xiaomengyang and Guanping, in Xishuangbanna, Yunnan, China. 1652 purified cultures of actinobacteria were isolated from these samples by using 5 media. The 16S rRNA gene sequences of 388 selected strains were analyzed, and the phylogenetic analysis was carried out. 35 genera which belong to 8 orders and 14 families of the Class actinobacteria were identified. It is showed from research results that actinomycete diversity in tropical rain forest of Xishuangbanna is the highest comparing with all areas studied in our laboratories before. Selective isolation methods for un-known actinomycetes from soil samples, including medium and inhibitors are discussed in this paper.

关键词： Actinomycetes Diversity Tropical rainy Forest Xishuangbanna

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CORRELATIVE ANALYSIS BETWEEN SOUTHERN OSCILLATION AND ACTIVITIES OF WEST PACIFIC HIGH DURING CHINESE rainy SEASON

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Chinese Science Bulletin 1988年第9期33卷 753-756页

作者：徐群 Jiangsu Meteorological Institute Nanjing

Southern Oscillation Indices (SOI)is the major factor reflecting the different phases of tropical air-sea interaction of planetary scale. It is well known that SOI influence greatly the low frequency fluctuation of tropical and subtropical circulations. Now, by means of two kinds of monthly SOI data in the term of more than 30 years, the author analyzes its lagging relation with some characteristical parameters of monthly WPH during the rainy season of China and finds out a significant

关键词： tropical typhoon season planetary rainy fluctuation northward reflecting landing autumn

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Occurrence and Epidemic Dynamics and Control Countermeasures of Important Sugarcane Diseases in rainy and Humid Season

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Plant Diseases and Pests 2017年第6期8卷 35-38页

作者： Li Wenfeng Shan Hongli Huang Yingkun Zhang Rongyue Cang Xiaoyan Yin Jiong Wang Xiaoyan Luo Zhiming Sugarcane Research Institute Yunnan Academy of Agricultural Science

The rainy and humid season from July to September is the crucial period for elongation and jointing and yield performance of sugarcane,and also a peak occurrence and damage period of many important sugarcane diseases. In order to prevent large-area outbreak of sugarcane diseases and ensure safe growth in late stage,the occurrence dynamics of important sugarcane diseases in the rainy and humid season was analyzed and discussed from the aspects of three epidemic outbreak elements of plant diseases: host plant,pathogen and environmental condition. Moreover,the corresponding control ideas and technical countermeasures were put forward according to the epidemic characteristic of sugarcane diseases and the actual sugarcane production.