1996年与1991年梅雨期灾情及致灾因素对比分析   总被引：1，自引：0，他引：1       下载免费PDF全文

张明玉 《气象》1997,23(9):46-49

１９９６年安徽省的梅雨总量与１９９１年相近，但洪涝灾害造成的经济损失仅是１９９１年的１／２。分析认为：１９９６年梅雨期的非稳定性暴雨（暴雨落区多变）是主要因素，梅雨期集中，暴雨落区偏南，梅雨前期雨水偏少也是重要原因。并对１９９１年和１９９６年梅雨期稳定性暴雨（暴雨落区少动）和非稳定性暴雨的环流特征、影响系统进行了分析对比。  相似文献   

DOPPLER SODAR AND ATMOSPHERIC BOUNDARY LAYER DETECTION          下载免费PDF全文

Zhou Mingyu  Chen Jingnan  Li Shiming  Zheng Yueming  Su Lirong  L&#;Naiping 《Acta Meteorologica Sinica》1991,5(3):331-341

A Doppler sodar system controlled by microcomputer is described in this paper. The sodar was usedto detect the vertical distribution of wind and temperature stratification in the atmospheric boundary layer.The detecting results show that at night the vertical distribution of wind is very complicated, which can appearas a structure of two or three layers. In nocturnal atmospheric boundary layer sometimes there exists verythin layer in multi-layer inversion and it can be retained for a long time.  相似文献   

坡地斜压稳定大气边界层结构的数值研究          下载免费PDF全文

钟世远  周明煜  李兴生 《大气科学》1988,12(3):301-311

本文用数值模式较为全面地探讨了斜坡地形斜压稳定大气边界层的结构,并与平坦地形的结果进行了比较,给出了两者之间很有意思的差别.  相似文献   

Application of sodar sounding to atmospheric dispersion—Mixing depth and concentration at the ground     

Xiao Jingwei  Lu Naiping  Zhou Mingyu 《大气科学进展》1985,2(1):63-71

It is the intent of this paper to illustrate how to apply acoustic radar data on the variation of mixing depth in the study of atmospheric dispersion. The box model, as an example of the routine usage of acoustic sounding, has been modified. A case of the development of the structure of mixed layer, resulting from some synoptic process is discussed and the results show that the ordinary model calculations regarding atmospheric dispersion will mislead the assessment of air quality if no remote techniques, such as the acoustic radar, are associated with.  相似文献   

察尔汗盐湖91-Ⅳ_4孔沉积地层元素地球化学的研究     

刘兴起  于昇松  邵明昱 《湖泊科学》1995,(4)

首次利用6步连续化学提取法,探讨和研究了察尔汗盐湖91—Ⅳ_4孔沉积物中16种元素在不同地球化学相中的结合形态和赋存状态。结果表明:碱金属K存在于可交换部分中;碱土金属Mg、Ba存在于碳酸盐相中,Mn在碳酸盐相中的含量也较高;B、P存在于有机质部分中;痕量金属大多存在于易还原相、中等还原相和硅酸盐矿物晶格的残渣部分中。  相似文献   

TIPEX高原东南部近地层湍流参数的分析   总被引：8，自引：0，他引：8  

BIAN Lingen  XU Xiangde  LU Longhu  GAO Zhiqiu  ZHOU Mingyu  LIU Huizhi 《大气科学进展》2003,20(3):369-378

The characteristics of the turbulence spectrum, turbulence variance, and turbulence flux at Qamdo overthe Southeastern Tibetan Plateau measured during the TIPEX experiment from 18 May to 30 June 1998are analyzed by the eddy correlation method. During periods of intense convection, most of the spectraof the 3D winds, temperature, and humidity follow a power law with a slope of -2/3. The normalizedvariances of the 3D winds in relation to z/L satisfy the similarity law but the normalized variances oftemperature and humidity are related to z/L by a -1/3 power law only in unstable conditions. In near-neutral stratification, σu/u* and σy/u* at Qamdo and Gerze are nearly constant in rugged terrain andσw/u* at Qamdo and Gerze is similar to the value found in plains, which indicates that the, effects oflandform on vertical turbulence is not significant over the southeast and western Tibetan Plateau. Duringthe dry period, the sensible heat dominates, comprising 81% of the heat intensity, with the other 19%being latent heat; during the wet period on the other hand, the latent heat accounts for about 64% ofthe available energy and the sensible heat only around 36%. The maximum intensity of the heating of airoccurs in the middle of the Plateau during the summertime.  相似文献   

A calculation method of the sensible heat flux by sodar     

Lu Naiping  Li Shiming  Chen Jingnan  Zheng Yueming  Zhou Mingyu 《海洋学报(英文版)》1989,8(2):191-198

- During the second course of USA - PRC joint air sea interaction experiment in 1986, the temperature structure parameters CT2 were measured by sodar over the Western Pacific Ocean. Based on similarity theory, a method is discussed to calculate the sensible heat flux over the ocean in unstable stratification. Becausehumidity is great over the ocean, so we have to consider the influence of water vapor structure parameter Ce2and the correlation coefficient betweene and T on the calculation of sensible heat flux using CT2 profiles measured by sodar. A new formula is suggested in terms of parameterization. The sensible heat flux calculated by sodar measurements is compared with that by bulk transfer method, and the results agree well.  相似文献   

高精度CTD剖面仪温度传感器   总被引：4，自引：5，他引：4  

吴明钰  李建国 《海洋技术学报》2001,20(1):143-146

高精度CTD剖面仪是国家863任务中818项目02专题的一个核心，温度的高精度测量传感器是其中重要参数。本文通过该传感器的研究，报告了我们研究的基本方案和方法，给出了目前达到的水平，本传感器具有体积小，精度高，优于0．003℃，可以达到0．001℃，响应时间快，时间 常数为70ms，耐压40MPa,能在3000m深度内正常工作，适用于深海温度场结构研究，海洋微结构研究，也可用于海气交换测量的研究，全球海洋环境保护，海洋环流，生态，渔业水产等诸多领域的高科技开发研究。  相似文献   

A genome-wide analysis of the chloroplast NADH dehydrogenase-like genes in Zostera marina     

Ma  Mingyu  Zhong  Mingyu  Zhang  Quansheng  Zhao  Wei  Wang  Mengxin  Luo  Chengying  Xu  Bin 《中国海洋湖沼学报》2022,40(2):656-677

Journal of Oceanology and Limnology - The chloroplast NADH dehydrogenase-like (NDH) complex, homologous to respiratory complex I, participates in photosystem I cyclic electron flow (PSI-CEF) and...  相似文献   

地下水污染控制修复技术研究趋势及热点分析   总被引：3，自引：2，他引：1       下载免费PDF全文

李玮  王明玉  刘丽雅  刘波  陈亚伟 《水文地质工程地质》2015,(2):120-125

对地下水污染控制修复技术SCI论文及专利数据进行检索统计,使用Cite SpaceⅢ数据可视化软件,对地下水污染控制修复技术研究发展趋势进行分析,探索潜在研究前沿及热点问题。结果显示,抽出处理等传统污染控制修复技术的研究关注度不断下降,原位修复技术、生物修复技术等为现阶段研究和应用的重点。针对砷、铀等典型污染物的修复技术,包括纳米技术、微生物技术等为目前研究的前沿,针对药品、MTBE等污染物的控制修复技术研究可能在未来成为新的研究前沿。中国地下水污染控制修复研究起步较晚,但发展迅速。  相似文献