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Evaluation of Cold Dew Wind Monitoring Precision for Late Rice based on CLDAS Data in guangxi

Agricultural Biotechnology 2019年第1期8卷 194-198页

作者： Yanli CHEN Yan HE Jianfei MO Yongming LUO Meihua DING guangxi institute of meteorological disaster mitigation/remote sensing application test base NSMC guangxi Collaborative Innovation Center for Ecological Environment & Integrative Development in Xijiang River Basin

The low temperature process of cold dew wind( from September 19 to 27 in 2011) for late rice production was dynamically monitored by using CLDAS temperature,combined with the background information of rice cultivation from multi-source satellite database together with an reference to the monitoring indexes of cold dew wind disaster to verify the precision of CLDAS data,so as to provide a reference for monitoring chilling damage caused by cold dew wind in late rice production in guangxi. The results showed that the cold wind dew caused heavy damage to an area of 3 159. 76 km^2,moderate damage to an area of 559. 77 km^2 and light damage to an area of 2 452. 14 km^2. The correlation coefficients between CLDAS inversion temperature and actual temperature of 12 verification meteorological stations were all larger than 0. 93,and the difference in daily average temperature was 0. 3 ℃. The time difference between maximum and minimum temperature provided by CLDAS and corresponding actual temperature from 12 meteorological stations was less than 1 h. The temperature data provided by CLDAS was in accordance with actual temperature data. With an advantage of rapidly,minutely and accurately monitoring the grade distribution of local cold dew wind disaster for late rice,CLDAS can be used in monitoring cold dew wind in late rice production in guangxi.

关键词： Cold dew wind Late rice CLDAS remote sensing guangxi

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Waterlogging risk assessment for winter wheat using multi-source data in the middle and lower reaches of Yangtze River

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 198-205页

作者： Yuanyuan Chen Jingfeng Huang Xiaodong Song Hongyan Wu Shaoxue Sheng Zhixiong Liu Xiuzhen Wang Key Laboratory of Agricultural remote sensing and Information System Zhejiang UniversityHangzhou 310058China institute of remote sensing and Information Technology application Zhejiang UniversityHangzhou 310058China Jiangsu meteorological Bureau Nanjing 210008China Anhui meteorological Information Center Anhui Meteorological BureauHefei 230031China Wuhan Regional Climate Center China Meteorological AdministrationWuhan 430074China institute of remote sensing and Earth Sciences Hangzhou Normal UniversityHangzhou 311121China

Waterlogging is a serious agro-meteorological disaster caused by excessive soil water,which usually causes tremendous crop yield *** region of middle and lower reaches of Yangtze River in China is an important production base of winter wheat,and is an area prone to *** risk assessment of winter wheat waterlogging can provide more thorough understanding about the risk-prone environment related with food safety in this *** study combined a variety of environmental and agricultural factors and assessed the waterlogging risk of winter wheat from the aspects of sensitivity of hazard formative environments,hazard risk,and vulnerability of hazard-affected body using multi-source ***,it constructed a compound waterlogging risk assessment model to classify the study area into high,relatively high,moderate,and low risky areas,*** results showed that the proposed model could more comprehensively reflect the occurrence mechanism of winter wheat waterlogging by synchronizing geographical,agricultural,and meteorological *** waterlogging regionalization based on the model could reasonably represent the spatial distribution and differentiate regional characteristics of winter wheat waterlogging in the study area.

关键词： waterlogging hazard formative environments vulnerability risk assessment

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STUDY AND application ON CLOUD COVERED RATE FOR AGROCLIMATICAL DISTRIBUTION USING IN guangxi baseD ON MODIS DATA

STUDY AND APPLICATION ON CLOUD COVERED RATE FOR AGROCLIMATIC...

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第二届国际计算机与计算技术在农业中的应用研讨会

作者： Xin Yang Shiquan Zhong Han Sun Zongkun Tan Zheng Li Meihua Ding remote sensing application and test base of National Satellite Meteorology Centre guangxi institute of Meteorology

based on analyzing of the physical characteristics of cloud and importance of cloud in agricultural production and national economy,cloud is a very important climatic resources such as temperature,precipitation and solar *** plays a very important role in agricultural climate *** paper analyzes methods of cloud detection based on MODIS data in China and *** results suggest that Quanjun He method is suitable to detect cloud in *** chart of cloud cover in guangxi is imaged by using Quanjun He *** find out the approach of calculating cloud covered rate by using the frequency spectrum *** last,the guangxi is *** Rongxian County guangxi as an example,this article analyze the preliminary application of cloud covered rate in distribution of Rong Shaddock *** results indicate that cloud covered rate is closely related to quality of Rong Shaddock pomelo.

关键词： MODIS cloud covered rate Rong Shaddock pomelo distribution

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