Effect of counter-gradient in the computation of turbulent fluxes of heat and moisture in a regional model

The counter-gradient terms in the computations of turbulent fluxes of heat and moisture have been included in the PBL parameterization of a regional model for monsoon prediction. Results show that inclusion of counter-gra-dient terms has a marginal impact in the prediction of large scale monsoon circulation and rainfall rates.     

安第斯山脉一个新的第三纪硼砂矿床

<正> 普纳(Puna)高原北部新近发现的洛马布兰卡(Loma Blanca)第三纪硼砂矿床,位于阿根廷的胡胡伊(Jujuy)省,距阿根廷、玻利维亚和智利三国交界处SE约70km,即南纬23°03′,西经66°27′之间。海拔约4150m。该矿床形成于第三纪(晚中新世)的干盐湖环境中,它是在世界范围内继克尔卡(Kirka)(土耳其)、博伦(Boron)(美国)和廷卡拉尤(Tincalayu)(阿根廷)之后的第四个被确认为具有工业储量的硼砂矿床。洛马布兰卡矿床中的主要矿物有:硼砂、板硼钙石、钠硼解石及少量的硬硼钙石和微量的砷硼镁钙石。     

全球应力场的规律性

对全球应力场的规律性研究是建立在以下的基础上: (1)全球应力场图数据库项目(WSM); (2)新构造运动构造分析的成果,即上新统和第四纪的构造运动或构造形变。其中,只考虑水平方向上的应力和应变分量。假定在构造活动区,如由构造变形导致的地壳最大水平缩短方向(MHS),局部地震的溶解断层面的轴方向,和最大水平挤压的方向均相互一致。应力场在空间上和时间上的连续性:在许多构造活动区,目前的主应力方向与引起上新世第四纪形变的主应力大致一致。进一步深入观察研究可知,水平应力方向从一个     

Ozone during stratospheric warmings at Uccle

The day-to-day variations in ozone content at Uccle (51oN) during some stratospheric warming events are ex-amined. In particular, the attention is focused on the timing of commencement of ozone enhancement prior to peak day of warming and on the relationship in the ozone content between the upper and lower stratosphere. These two features are compared with the predictions of ozone transport models. There seems to be an agreement between mod-el predictions and observed features in some cases.     

地心笛卡尔坐标系中地面点到旋转参考椭球面的投影

本文提出了一种钭地心笛卡尔坐标系中一地面投影到旋转椭球面的快速迭代解法。并由此点的地心笛片尔坐标协因数阵导出此点及其到椭球面投影响的坐标全向量协因数阵，用以计算椭球高及相关方差。