百色双套自动气象站雷击故障维修的方法     

黄健征  田小芳 《气象研究与应用》2014,(1):97-98

通过对百色双套自动气象站遇到历史罕见的强雷暴袭击出现故障维修,摸索出了检修双套新型自动站的通信、电源供应、主机HY3000、接口RS232、分采仪器等模块的方法,供同行借鉴.  相似文献   

运用气象影视节目强化气象科普宣传   总被引：1，自引：0，他引：1  

周晓湘  黄帅  魏璐  吴志坚 《气象研究与应用》2014,(1):119-121

通过对目前气象科普知识宣传现状的分析,找出存在的问题和电视气象节目气象科普宣传的优势,提出强化电视气象节目气象科普宣传的建议,为我们搞好气象科技服务打下良好的社会基础.  相似文献   

基于GIS的广东冬种辣椒气候适宜性区划   总被引：3，自引：0，他引：3  

王华  胡飞  黄俊 《气象与环境科学》2014,37(3):76-80

基于广东省86个气象站1980-2012年气候资料和1991-2010年冬季寒害灾情资料,采用冬季(12月一翌年2月)≥15℃有效积温作为冬种辣椒的气候资源指标,选取寒害过程中最低气温＜10℃的天数、日最低气温＜10.0℃积寒量构建冬种辣椒的寒害风险指标,完善了冬种辣椒的种植气候适宜性指标.构建指标的空间分析模型,采用ArcGIS的空间分析和多层复合方法,对广东冬种辣椒的气候适宜性进行了区域划分.结果表明,冬种辣椒的气候最适宜种植区主要分布在雷州半岛、茂名、阳江等地区,适宜种植区主要分布在南部沿海地区和中部偏南地区,次适宜种植区主要分布在中部偏北地区和北部偏南地区,不适宜种植区主要分布在肇庆、清远、韶关、河源及梅州等地的北部.  相似文献   

2013年12月广西一次暴雨落区变化原因分析   总被引：1，自引：0，他引：1  

黄翠银  陈剑飞 《气象研究与应用》2014,(1):29-35

利用micaps常规观测资料和NCEP再分析资料,对2013年12月13日～17日广西出现持续性强降雨天气的物理量场的分析得出：强降雨主要是由低层切变线和南支槽共同作用引起,各层天气系统对每天强降雨的贡献不尽相同,第一天高空南支槽还比较浅薄,强降雨主要由低层切变线和超低空东南急流引起;第二、第三天强降雨则是由加深东移的南支槽和北抬又南压的低层切变线共同作用引起;第四天降雨中低层转北风,只有500hPa南支槽和700hPa切变线共同影响.  相似文献   

CMIP5模式对南海SST的模拟和预估   总被引：4，自引：1，他引：3  

黄传江  乔方利  宋亚娟  李新放 《海洋学报》2014,36(1):38-47

分析了32个CMIP5模式对南海历史海表温度(SST)的模拟能力和不同排放情景下未来SST变化的预估。通过检验各气候模式对南海历史SST增温趋势和均方差的模拟,发现大部分模式都能较好地模拟出南海20世纪历史SST的基本特征和变化规律,但也有部分模式的模拟存在较大偏差。尽管这些模拟偏差较大的模式对SST多模式集合平均的影响不大,但会增加未来情景预估的不确定性。剔除15个模式后,分析了南海SST在RCP26、RCP45和RCP85三种排放情景下的变化趋势,发现在未来百年呈明显的增温趋势,多模式集合平均的增温趋势分别为0.42、1.50和3.30℃/(100a)。这些增温趋势在空间上变化不大,但随时间并不是均匀变化的。在前两种排放情景下,21世纪前期的增温趋势明显强于后期,而在RCP85情景下,21世纪后期的增温趋势强于前期。  相似文献   

胶州湾沉积物中有机硫来源及成因机制的研究     

黄香利  朱茂旭  陈良进  李铁 《海洋学报》2014,36(6):50-57

有机硫是海洋沉积物中重要的硫形态,其中成岩有机硫对有机质保存和微量元素形态具有重要影响。利用化学提取及硫稳定同位素研究了胶州湾沉积物中碱可提取的腐殖酸硫(HA-S)、富里酸硫(FA-S)以及铬不可还原有机硫(non-CROS)的垂直分布、来源及形成机制。结果表明,non-CROS、HA-S以及FA-S的含量范围分别为19.1~52.6、3.35~7.82和27.3~38.6μmol/g,均处于其他许多近海沉积物中含量的低值区,且3者均为海洋生物有机硫和成岩有机硫的混合物。HA-S和nonCROS以海洋生物有机硫为主,其份数分别为65%~68%和67%~77%,而FA-S则以成岩有机硫为主(54%~73%)。相对于生物有机硫,成岩有机硫更易被碱和酸性Cr(Ⅱ)溶液提取,因此腐殖质硫和non-CROS都不能全面反映沉积物中有机硫的组成和来源。黄铁矿和腐殖质中成岩有机硫含量随深度的同步增加表明黄铁矿形成并未明显地竞争性抑制有机质硫化。  相似文献   

中国近海浮游桡足类中华哲水蚤（Calanussinicus Brodsky）的分子系统地理学和种群遗传结构研究     

Huang Yousong  Liu Guangxing  Chen Xiaofeng 《海洋学报(英文版)》2014,33(10):74-84

Planktonic copepod Calanus sinicus is the dominant meso-zooplankton in the Northwest Pacific Ocean. To better understand its population dynamics and phylogeographic patterns, 243 C. sinicus individuals were collected from seven locations across the shelf waters of China and its population genetics was studied by mitochondrial DNA cytochrome oxidase I(mtCOI) sequences analyses. Thirty-nine different sequences, or haplotypes, were detected with moderate haplotype diversity(h=0.749) and low nucleotide diversity(π=0.003) for all populations. The evolutionary divergence between geographic populations varied from 0.24% to 0.37%, indicative of very limited genetic differentiation. Visualized minimum spanning network(MSN) and phylogenetic analysis of all the detected haplotypes did not reveal any clear phylogeographic pattern. Furthermore, AMOVA data showed no significant spatial population differentiation existed among the individuals collected across China shelf waters. Pairwise FST values showed that population collected from northwest of the East China Sea(ECS) displayed a low difference to other populations. Mismatch distribution analyses and neutrality tests indicated that C. sinicus might undergo a demographic/population expansion. No significant population genetic structuring was detected, indicating an extensive gene flow among the C. sinicus populations. Our results provide molecular evidence for the hypothesis that C. sinicus in the northwestern South China Sea in winter is transported from the East China Sea and the Yellow Sea by the China Coastal Current during the northeast monsoon period.  相似文献   

Variability of Atlantic Meridional Overturning Circulation in FGOALS-g2简   总被引：3，自引：0，他引：3  

HUANG Wenyu  WANG Bin  LI Lijuan  DONG Li  LIN Pengfei  YU Yongqiang  ZHOU Tianjun  LIU Li  XU Shiming  XIA Kun  PU Ye  WANG Lu  LIU Mimi  SHEN Si  HU Ning  WANG Yong  SUN Wenqi  DONG Fang 《大气科学进展》2014,31(1):95-109

The variability of Atlantic Meridional Overturning Circulation （AMOC） in the pre-industrial control experiment of the Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 （FGOALS-g2） was investigated using the model outputs with the most stable state in a 512-yr time window from the total 1500-yr period of the experiment. The period of AMOC in FGOALS-g2 is double peaked at 20 and 32 years according to the power spectrum, and 22 years according to an auto-correlation analysis, which shows very obvious decadal variability. Like many other coupled climate models, the decadal variability of AMOC in FGOALS-g2 is closely related to the convection that occurs in the Labrador Sea region. Deep convection in the Labrador Sea in FGOALS-g2 leads the AMOC maximum by 3-4 years. The contributions of thermal and haline effects to the variability of the convection in three different regions [the Labrador, Irminger and Greenland-Iceland- Norwegian （GIN） Seas] were analyzed for FGOALS-g2. The variability of convection in the Labrador and Irminger Seas is thermally dominant, while that in the colder GIN Seas can be mainly attributed to salinity changes due to the lower thermal expansion. By comparing the simulation results from FGOALS-g2 and 11 other models, it was found that AMOC variability can be attributed to salinity changes for longer periods （longer than 35 years） and to temperature changes for shorter periods.  相似文献   

Regional differences in surface sensible and latent heat fluxes in China     

Lian-Tong Zhou  Ronghui Huang 《Theoretical and Applied Climatology》2014,116(3-4):625-637

This study documents the variability of surface sensible and latent heat fluxes in five regions of China (Northwest China, the Tibetan Plateau, Northeast China, North China, and Southeast China) using the ERA-40 reanalysis for the years 1960–2000. The surface sensible and latent heat flux variations are remarkably different in Northwest and Southeast China. The seasonal variation of the surface sensible heat fluxes is largest in Northwest China and smallest in Southeast China. In contrast, the seasonal variation in latent heat flux is largest in Southeast China and smallest in Northwest China. The interdecadal variation of surface sensible and surface latent heat fluxes strongly depends on both the region and season. The trends in surface sensible and latent heat fluxes in all four seasons are mainly caused by variations in both the land–air temperature difference and in the specific humidity. There is also a limited contribution of wind speed in some regions, depending on the season.  相似文献   

Improvement of the semi-Lagrangian advection scheme in the GRAPES model: Theoretical analysis and idealized tests   总被引：2，自引：0，他引：2  

HUANG Bo  CHEN Dehui  LI Xingliang  LI Chao 《大气科学进展》2014,31(3):693-704

ABSTRACT The Global/Regional Assimilation and PrEdiction System （GRAPES） is the newgeneration numerical weather predic- tion （NWP） system developed by the China Meteorological Administration. It is a fully compressible non-hydrostatical global/regional unified model that uses a traditional semi-Lagrangian advection scheme with cubic Lagrangian interpola tion （referred to as the SL_CL scheme）. The SL_CL scheme has been used in many operational NWP models, but there are still some deficiencies, such as the damping effects due to the interpolation and the relatively low accuracy. Based on Reich＇s semi-Lagrangian advection scheme （referred to as the R2007 scheme）, the Re_R2007 scheme that uses the low- and high-order B-spline function for interpolation at the departure point, is developed in this paper. One- and two-dimensional idealized tests in the rectangular coordinate system with uniform grid cells were conducted to compare the Re..R2007 scheme and the SL_CL scheme. The numerical results showed that： （1） the damping effects were remarkably reduced with the Re_R2007 scheme; and （2） the normalized errors of the Re_R2007 scheme were about 7.5 and 3 times smaller than those of the SL_CL scheme in one- and two-dimensional tests, respectively, indicating the higher accuracy of the Re..R2007 scheme. Furthermore, two solid-body rotation tests were conducted in the latitude-longitude spherical coordinate system with non uniform grid cells, which also verified the Re_R2007 scheme＇s advantages. Finally, in comparison with other global advection schemes, the Re_R2007 scheme was competitive in terms of accuracy and flow independence. An encouraging possibility for the application of the Re_R2007 scheme to the GRAPES model is provided.  相似文献