Dynamical framework with blocking topography coordinates for atmospheric GCM and its validation

The dynamical framework with Blocking Topography Coordinates (hereafter, BTC), which is suited to handle the steep topography for the atmospheric general circulation models, is presented in this paper, together with its validation results. The integral properties of both the differential and finite-difference equations for the BTC dynamical core are: gross mass conservation, quadratic conservation for advection terms, Coriolis force does not change the kinetic energy, conservation of total available energy. The improved nonlinear iteration scheme is utilized for the time-integration. The energy conservation for BTC dynamical core is validated by using the integration results from 9-layer and 21-layer version respectively. Comparison results show that, the changes of the kinetic energy and total available potential energy during the integration are quite close for both the BTC dynamical framework and the dynamical framework of IAP 9-level and IAP 21-level AGCM, and this may suggest that the BTC dynamical core can be used for long-term integration with good computational stability. Furthermore, the BTC dynamical core has the advantage over the terrain following (sigma) coordinates in its better representation of the influence of the large-scale topography on the atmospheric general circulation. Finally, the correctness and reasonableness of the BTC dynamical core has been further proved by the numerical simulation of the topography influence on the quasi-stationary planetary wave with 21-layer version of BTC dynamical framework.     

光电成像系统分析中大气传输特性计算的几个问题

利用美国大气传输特性软件LOWTRAN，对常用的基于气象学能见距离的大气透射比公式及中波和长波红外透射比进行了分析．结果表明：气象学能见距离透射比公式可以较好地描述美国标准大气下可见光的光谱透射比和平均透射比，但其向紫外和红外波段的适用性需要慎重处理；在高温和潮湿条件下，中波红外波段的大气平均透射比在路径的起始阶段衰减较快；但在一定距离外，中波红外波段的大气平均透射比优于长波红外波段。     

铜在大气中的腐蚀

综述了铜在不同大气气氛中的腐蚀情况,分别介绍了铜在含有硫酸铵[(NH4)2SO4]、硫酸氢铵(NH4HSO4)、二氧化硫(SO2)、臭氧(O3)、氯化钠(NaCl)的大气中的腐蚀速率、腐蚀产物及腐蚀机理。表明当(NH4)2SO4微粒存在时,可能形成铜绿中的碱式硫酸铜。铜在含SO2+O3的潮湿大气中腐蚀很快,加入少量NaCl,会使腐蚀速率显著减少;加入大量NaCl,会使腐蚀速率增加。     

安徽省宣州市大气环境质量评价与整治对策分析

在对安徽省宣州市区域环境特征分析的基础上，本文采用模糊数学的方法，对宣州市大 环境质量进行了系统分析与评价，根据评价结论的分析，探讨了各环境功能区的经济发展方向与环境整治对策。     

大气有效发射率与水汽和CO2的纬带关系研究

根据水汽和ＣＯ２的辐射传输和它们的纬带分布观测值，建立了一个大气有效发射率εａ，与大气中的水汽含量Ｗａ和ＣＯ２含量ｃ的半经验公式。该公式对于把水汽和ＣＯ２对气候的温室作用纳入气候模式或地球表层动力学模式十分有用。     

南充市城区大气颗粒物分布规律的探讨

通过对南充市城区大气颗粒浓度的监测与分析，得到了该市城区大气颗粒物浓度的时空分布规律，并分析了形成的原因。     

走出山西焦炉煤气浪费的困境

针对炼焦过程中产生的焦炉煤气的现状进行了分析，就如何利用焦炉煤气这一资源来提高能源综合利用率进行了探讨，并提出了若干具体对策。     

佛山市禅城区大气环境质量变化研究

以佛山市禅城区近20年的大气环境监测数据为依据,对NOx,SO2,降尘、总悬浮颗粒物(TSP)、酸雨等大气环境质量要素的变化进行分析。结果表明,禅城区大气环境质量20世纪90年代比20世纪80年代差,21世纪初有所好转,但近年来又有所变差,首要污染物从过去的尘粒性污染物转为现在的SO2。     

Studying the stability of the middle atmosphere (30―60 km) over Wuhan by Rayleigh lidar

The stability of the middle atmosphere ranging from 30 km to 60 km over Wuhan is elementarily studied, according to the observational data obtained in about one year through the WlPM Rayleigh lidar. The stability parameter （buoyancy frequency squared）, which was obtained through the temperature field, shows that the middle atmosphere over Wuhan is stable all the year round, but the stability appears variable because the stability of summer and winter is lower, and that of spring and autumn is higher.