为深入理解配料法在宁南山区暴雨预报中的应用价值,借助诊断性物理量及配料法思路,分析2011年发生在宁夏南部山区的几次暴雨天气,认为配料法应用的前提是理论相对成熟,同类多个物理量构成一个要素,且达到阈值的要素之间有重要的相互补...为深入理解配料法在宁南山区暴雨预报中的应用价值,借助诊断性物理量及配料法思路,分析2011年发生在宁夏南部山区的几次暴雨天气,认为配料法应用的前提是理论相对成熟,同类多个物理量构成一个要素,且达到阈值的要素之间有重要的相互补充作用;暴雨天气的构成要素包括水汽条件、抬升条件、层结条件和持续时间条件;暴雨天气的构成系统包括500 h Pa槽涡、700 h Pa低涡切变、西太平洋副热带高压、高空急流。展开更多
用关系型数据库的第四范式作为分析方法,在SQL Server 2005数据库系统平台上建立第04类格式的格点高空历史资料数据库.基于C#.Net的编写客户端,采用批处理技术,用客户端软件打开、解压和读出每一个NCEP数据,并把该数据以二进制形式录入...用关系型数据库的第四范式作为分析方法,在SQL Server 2005数据库系统平台上建立第04类格式的格点高空历史资料数据库.基于C#.Net的编写客户端,采用批处理技术,用客户端软件打开、解压和读出每一个NCEP数据,并把该数据以二进制形式录入信息中心的高空数据库.基于C/S方式建立的第04类格式的格点高空数据库系统是一个新型的、适合运行在现代通信网络上的高空数据库系统.该系统为第04类格式的格点高空数据库数据维护、查询和初步统计提供了一种新的技术手段,能够很好地为气象部门各层次科研人员提供第04类格式的格点数据.展开更多
[Objective] The aim was to analyze and conclude highlights of meteorolog- ical services for agriculture with the case of Celery industry belts in regions of Hulu River. [Method] In the research, a regression equation ...[Objective] The aim was to analyze and conclude highlights of meteorolog- ical services for agriculture with the case of Celery industry belts in regions of Hulu River. [Method] In the research, a regression equation of celery growth and meteoro- logical factors was established, and meteorological indices of celery in growth period, meteorological disaster indices and highlights of meteorological service for farmers were analyzed in terms of meteorology based on observation of biomass, growth period, and information in national basic stations and automatic stations in regions of Hulu River. [Result] The sowing period and germination period of celery were more significantly influenced by lower temperature of spring in northern area, compared with southern area, hence, celery plants in northern area should be sown later. The suitable germination stage differed about ten days in the four regions from south to north from middle Apdl to middle May. In common climate, the regions in south of Xiao River are not suitable to grow celery under influence of higher temperature at 26 ℃. Hence, celery industry belts should be moved to the north along Hulu River. During growth period of outer leaf, however, celery were less influenced by hail. [Conclusion] The research lays foundation for meteorological service for agriculture.展开更多
[Objective] The paper was to study the climate conditions of celery indus- trial belt in Huluhe Basin. [Method] Using the climate data of Xiji national basic sta- tion during 1981 and 2010, the meteorological data dur...[Objective] The paper was to study the climate conditions of celery indus- trial belt in Huluhe Basin. [Method] Using the climate data of Xiji national basic sta- tion during 1981 and 2010, the meteorological data during crop growth period in 3 automatic weather stations along Huluhe Basin were carried out regression analysis, and the climate condition of west celery industrial belt was conducted hierarchical clustering analysis by SPSS. [Result] West celery industrial belt along Huluhe Basin could be divided into 2 growing regions： partially southern warm, rainy and early mature region, partially northern cold, rainless and late mature region. Years of practice proved that the small climate differences within 2 planting regions were more obvious, so these 2 planting regions could be further divided into 4 subre- glens： Xinglong warm, rainy and early mature subregion, Xiaohe thermal, rainy and partially early mature region, Jiqiang cool, rainless and middle mature subregion and Xinying cold, rainless and late mature subregion. [Conclusion] The study has refer- ence value for determination of different sowing time, different fertilizer and irrigation scheme, pests and diseased control and marketing time of west celery under mulch- sanded bunch plantation in market economic condition.展开更多
[Objective] The aim was to study the characteristics of the changes of extreme weather climate incidents such as severe drought in northwest and rainstorm in Xiji County of Ningxia. [Method] Precipitation anomaly perc...[Objective] The aim was to study the characteristics of the changes of extreme weather climate incidents such as severe drought in northwest and rainstorm in Xiji County of Ningxia. [Method] Precipitation anomaly percentage was applied to divide drought level and for statistics analysis. Seasonal index, linear tendency, and 5-years gliding average were used to reflect the trend of drought changes. The circulation wave of temporal sequence used polynomial expression to simulate the interannual variation scale. The positive part of the polynomial expression used bar chart to simulate interannual variation scale. [Result] The index of drought season from November to June was large. The general trend of annual drought was increasing. The drought of interannual scale was most serious around 1977, about 15 and 20 years. The drought in recent years went up. The general situation of drought, interannual scale and changes of interannual scales from March to May and from September to October were discussed. Based on the weather at 500 hPa, the first rain in Xiji and the drought-turning-into-rain situation were classified. [Conclusion]These may provide reference value to the prevention and mitigation of drought.展开更多
The agro-meteorological conditions for film mulching planting in autumn in Xiji, Ningxia was studied by using the meteorological data from the national basic stations over the years, including the mulching planting of...The agro-meteorological conditions for film mulching planting in autumn in Xiji, Ningxia was studied by using the meteorological data from the national basic stations over the years, including the mulching planting of corn in autumn in differ- ent stages from 1985 to 1986, the mulching planting in different stages after the appearance of effective precipitation in October, and the wind simulation experimen- tal data of blower. Precipitation suitability analysis model before autumn film mulching and crop growth period was simulated to analyze the effective precipitation weather before mulching planting in autumn, and simulations were also made to temperature suitability analysis model during soil preparation and film mulching peri- ods in autumn, the suitability function of optimal sowing time about the soil moisture dynamic changes in autumn in different times, the best water conservation effect in film mulching period at different time after the appearance of effective precipitation, the wind resistance function of film mulching in autumn. All the simulation work was of high referential value to carry out meteorological service and agricultural weather forecast about film mulching in autumn.展开更多
文摘为深入理解配料法在宁南山区暴雨预报中的应用价值,借助诊断性物理量及配料法思路,分析2011年发生在宁夏南部山区的几次暴雨天气,认为配料法应用的前提是理论相对成熟,同类多个物理量构成一个要素,且达到阈值的要素之间有重要的相互补充作用;暴雨天气的构成要素包括水汽条件、抬升条件、层结条件和持续时间条件;暴雨天气的构成系统包括500 h Pa槽涡、700 h Pa低涡切变、西太平洋副热带高压、高空急流。
文摘用关系型数据库的第四范式作为分析方法,在SQL Server 2005数据库系统平台上建立第04类格式的格点高空历史资料数据库.基于C#.Net的编写客户端,采用批处理技术,用客户端软件打开、解压和读出每一个NCEP数据,并把该数据以二进制形式录入信息中心的高空数据库.基于C/S方式建立的第04类格式的格点高空数据库系统是一个新型的、适合运行在现代通信网络上的高空数据库系统.该系统为第04类格式的格点高空数据库数据维护、查询和初步统计提供了一种新的技术手段,能够很好地为气象部门各层次科研人员提供第04类格式的格点数据.
文摘[Objective] The aim was to analyze and conclude highlights of meteorolog- ical services for agriculture with the case of Celery industry belts in regions of Hulu River. [Method] In the research, a regression equation of celery growth and meteoro- logical factors was established, and meteorological indices of celery in growth period, meteorological disaster indices and highlights of meteorological service for farmers were analyzed in terms of meteorology based on observation of biomass, growth period, and information in national basic stations and automatic stations in regions of Hulu River. [Result] The sowing period and germination period of celery were more significantly influenced by lower temperature of spring in northern area, compared with southern area, hence, celery plants in northern area should be sown later. The suitable germination stage differed about ten days in the four regions from south to north from middle Apdl to middle May. In common climate, the regions in south of Xiao River are not suitable to grow celery under influence of higher temperature at 26 ℃. Hence, celery industry belts should be moved to the north along Hulu River. During growth period of outer leaf, however, celery were less influenced by hail. [Conclusion] The research lays foundation for meteorological service for agriculture.
基金Supported by Meteorological Science and Technology Project of Ningxia Meteorological Bureau in 2011 "West Celery Experiment of Sowing by Stages"~~
文摘[Objective] The paper was to study the climate conditions of celery indus- trial belt in Huluhe Basin. [Method] Using the climate data of Xiji national basic sta- tion during 1981 and 2010, the meteorological data during crop growth period in 3 automatic weather stations along Huluhe Basin were carried out regression analysis, and the climate condition of west celery industrial belt was conducted hierarchical clustering analysis by SPSS. [Result] West celery industrial belt along Huluhe Basin could be divided into 2 growing regions： partially southern warm, rainy and early mature region, partially northern cold, rainless and late mature region. Years of practice proved that the small climate differences within 2 planting regions were more obvious, so these 2 planting regions could be further divided into 4 subre- glens： Xinglong warm, rainy and early mature subregion, Xiaohe thermal, rainy and partially early mature region, Jiqiang cool, rainless and middle mature subregion and Xinying cold, rainless and late mature subregion. [Conclusion] The study has refer- ence value for determination of different sowing time, different fertilizer and irrigation scheme, pests and diseased control and marketing time of west celery under mulch- sanded bunch plantation in market economic condition.
基金Supported by National Natural Science Foundation of China(40765003)Guyuan Meteorological Bureau Science and Technology Program in Ningxia~~
文摘[Objective] The aim was to study the characteristics of the changes of extreme weather climate incidents such as severe drought in northwest and rainstorm in Xiji County of Ningxia. [Method] Precipitation anomaly percentage was applied to divide drought level and for statistics analysis. Seasonal index, linear tendency, and 5-years gliding average were used to reflect the trend of drought changes. The circulation wave of temporal sequence used polynomial expression to simulate the interannual variation scale. The positive part of the polynomial expression used bar chart to simulate interannual variation scale. [Result] The index of drought season from November to June was large. The general trend of annual drought was increasing. The drought of interannual scale was most serious around 1977, about 15 and 20 years. The drought in recent years went up. The general situation of drought, interannual scale and changes of interannual scales from March to May and from September to October were discussed. Based on the weather at 500 hPa, the first rain in Xiji and the drought-turning-into-rain situation were classified. [Conclusion]These may provide reference value to the prevention and mitigation of drought.
基金Supported by the Program for Scientific Research of Ningxia Meteorological Bureau in 2015~~
文摘The agro-meteorological conditions for film mulching planting in autumn in Xiji, Ningxia was studied by using the meteorological data from the national basic stations over the years, including the mulching planting of corn in autumn in differ- ent stages from 1985 to 1986, the mulching planting in different stages after the appearance of effective precipitation in October, and the wind simulation experimen- tal data of blower. Precipitation suitability analysis model before autumn film mulching and crop growth period was simulated to analyze the effective precipitation weather before mulching planting in autumn, and simulations were also made to temperature suitability analysis model during soil preparation and film mulching peri- ods in autumn, the suitability function of optimal sowing time about the soil moisture dynamic changes in autumn in different times, the best water conservation effect in film mulching period at different time after the appearance of effective precipitation, the wind resistance function of film mulching in autumn. All the simulation work was of high referential value to carry out meteorological service and agricultural weather forecast about film mulching in autumn.
