浙江近海夜光藻的分布及其生态学特点

本文利用历次夜光藻调查资料，阐述了其在浙江近岸海域的分布特点，丰度高峰主要出现在春秋季，夏季亦存在暴发性增殖的可能性，冬季则基本见不到夜光藻的踪迹。杭州湾口等水体浑浊区是夜光藻的低丰度区，仅在春夏季有零星出现，这与水体透明度低、悬浮泥沙含量高及强烈的水动力因子等密切相关。在时间尺度上，夜光藻丰度呈上升趋势，根本原因是海域富营养化加剧的结果。     

The Structure of Potential Amur Tiger (Panthera tigris altaica) Habitats and Evaluation of Its Prey in Taipingou National Reserve (China) Based on Remote Sensing Data

Izvestiya, Atmospheric and Oceanic Physics - The population of the Amur tiger (Panthera tigris altaica) in the Russian Far East is currently being restored; young individuals are being spread...     

大气季节内振荡对印度洋—西太平洋地区热带低压/气旋生成的影响

文中利用EOF分析大气季节内振荡 (MJO)的时空变化的方法 ,研究了 1996年 9月～ 1997年 6月间的MJO活动对生成在印度洋—西太平洋海域的热带低压 /气旋的影响。结果发现 ,除西北太平洋之外 ,发生在其他区域的热带低压 /气旋有半数以上生成在向东移动的MJO的湿位相中。伴随MJO的向东传播 ,热带低压 /气旋平均生成位置也随之向东移动 ,而生成在西北太平洋的热带低压 /气旋分别受到向东和向西传播的MJO影响     

南海西沙海槽S14站位的地球化学异常特征及其意义

西沙海槽具备良好的天然气水合物的形成条件,并已发现与其有关的地球物理标志--模拟海底反射层（BSR）。通过对西沙海槽S14大型活塞站位的孔隙水和沉积物样品进行化学组分、酸解烃和热释光等方面的分析测试,结果发现在海底之下4～5 m区间存在着较明显的高盐高烃异常,其中酸解烃中的甲烷、乙烷、丙烷含量及其热释光值均有所增高,孔隙水中的绝大部分离子及其盐度也存在着明显的升高,这一高盐高烃异常可能是下部与天然气水合物有关的孔隙流体沿着断层向上迁移所致。这些地球化学异常以及模拟海底反射层等地球物理标志显示该站位之下可能存在天然气水合物。     

利用数字化雷达回波参数分析人工增雨播云条件

利用数字化测雨雷达观测的层状云雷达立体扫描资料和探空资料，分析得出层状云降水部分特征，并利用多元逐步回归获得催化作业效果指标y=2.0mm.h^-1，在使用雷达立体扫描资料进行人工增雨作业时指导方面做了探讨。     

Investigation of rupture process of the 1999 M =5.4 Xiuyan, Liaoning, earthquake sequence

Conclusions The sequence of the November 29, 1999 Xiuyan, Liaoning, earthquake withM _S=5.4 is relocated, and its rupture process is analyzed. Results are as follows: The rupture extended mainly before the January 12, 2000,M _S=5.1 earthquake. There are two phases of rupture extending: The first phase was before the November 29, 1999,M _S=5.4 earthquake, epicenters were situated within a small region with a dimension of about 5 km, and the focal depth increased. It shows that the rupture mainly extended from shallow part to deep in the vertical direction. The second phase was between theM _S=5.4 earthquake and theM _S=5.1 earthquake, earthquakes migrated along southeast, the focal depth decreased. It indicates that the rupture extended along southeast and from deep to shallow part. Foundation item: The Project of “Mechanism and Prediction of the Strong Continental Earthquake” (95-13-05-04). Contribution No. 01FE2017, Institute of Geophysics, China Seismological Bureau.     

2003-2016年北极净初级生产力时空变化

The area of Arctic sea ice has dramatically decreased, and the length of the open water season has increased;these patterns have been observed by satellite remote sensing since the 1970 s. In this paper, we calculate the net primary productivity(NPP, calculated by carbon) from 2003 to 2016 based on sea ice concentration products,chlorophyll a(Chl a) concentration, photosynthetically active radiation(PAR), sea surface temperature(SST), and sunshine duration data. We then analyse the spatiotemporal changes in the Chl a concentration and NPP and further investigate the relations among NPP, the open water area, and the length of the open water season. The results indicate that(1) the Chl a concentration increased by 0.025 mg/m~3 per year;(2) the NPP increased by 4.29 mg/(m~2·d) per year, reaching a maximum of 525.74 mg/(m~2·d) in 2016; and(3) the Arctic open water area increased by 57.23×10~3 km~2/a, with a growth rate of 1.53 d/a for the length of the open water season. The annual NPP was significantly positively related to the open water area, the length of the open water season and the SST.The daily NPP was also found to have a lag correlation with the open water area, with a lag time of two months.With global warming, NPP has maintained an increasing trend, with the most significant increase occurring in the Kara Sea. In summary, this study provides a macroscopic understanding of the distribution of phytoplankton in the Arctic, which is valuable information for the evaluation and management of marine ecological environments.     

南京地区旅游景点天气预报技术研究

从旅游景点的特点出发，用天气观测事实，结合天气学原理，研制了既科学又切合实际，具有可操作性的旅游景点天气预报的制作技术。将邻近气象站的天然预报作为景点天然预报     

可持续发展研究态势析评

可持续发展已成为当今国际社会论坛的主题。本文通过历史回顾和现状分析,从可持续发展的概念、内涵、评价准则和指标,以及研究方法和社会实践方面,比较系统地分析了国内外有关可持续发展理论研究的成就和动向,以及存在的问题,并探讨了我国今后的研究重点和实践对策。     

High-resolution structures of the Landers fault zone inferred from aftershock waveform data

High-frequency body waves recorded by a temporary seismic array across the surface rupture trace of the 1992 Landers, California, earthquake were used to determine fault-zone structures down to the seismogenic depth. We first developed a technique to use generalized ray theory to compute synthetic seismograms for arbitrarily oriented tabular low-velocity fault-zone models. We then generated synthetic waveform record sections of a linear array across a vertical fault zone. They show that both arrival times and waveforms of P and S waves vary systematically across the fault due to transmissions and reflections from boundaries of the low-velocity fault zone. The waveform characteristics and arrival-time patterns in the record sections allow us to locate the boundaries of the fault zone and to determine its P - and S -wave velocities independently as well as its depth extent. Therefore, the trade-off between the fault-zone width and velocities can be avoided. Applying the method to the Landers waveform data reveals a low-velocity zone with a width of 270–360 m and a 35–60 per cent reduction in P and S velocities relative to the host rock. The analysis suggests that the low-velocity zone extends to a depth of ∼7 km. The western boundary of the low-velocity zone coincides with the observed main surface rupture trace.