排序方式： 共有73条查询结果，搜索用时 0 毫秒
71.
利用2020年贵州省安顺站大气电场仪和地面气象要素观测资料,在分析该地区大气电场时间演变特征的基础上,分类讨论了晴天、降雪、强雷暴等天气类型下大气电场与同期气象要素的关系。结果表明：安顺站大气电场全年日变化均为正,夏半年、冬半年和全年平均三者日变化基本一致,在午后到傍晚较低,其数值在夏半年明显弱于冬半年和全年平均。月变化整体呈减弱趋势,其中6～7月有明显的跃升;晴天,大气电场平均强度介于0.15～1.01 KV/m,08时左右达到峰值,17时左右达到谷值,为典型的“单峰单谷”大陆简单型,与气温呈负相关,与相对湿度呈正相关;降雪天气,大气电场平均强度在3 KV/m左右小幅波动,凌晨达到峰值,14时左右达到谷值,与气温基本呈负相关,与相对湿度呈正相关;强雷电天气,大气电场平均强度介于1.5～3.1 KV/m,最强瞬时强度可达几十KV/m,午后开始逐渐增强,傍晚达到峰值,与地面气压和相对湿度均为负相关关系。相对湿度与大气电场的相关性普遍高于地面气压和气温。 相似文献
72.
HY-2 A(Haiyang-2 A), launched in 2011, is the first ocean dynamic environment satellite of China and is equipped with a radar altimeter as one of the primary payloads. HY-2 A shifted the drift orbit in March 2016 and has been accumulating geodetic mission(GM) data for more than three years with 168-day cycle. In this paper, we present the preliminary gravity field inverted by the HY-2 A/GM data from March 2016 to December 2017 near Taiwan(21°–26°N, 119°–123°E). The gravity anomaly is computed by Inverse Vening Meinesz(IVM) formula with a onedimensional FFT method during remove-restore procedure with the EGM2008 gravity model as the reference field. For comparison, CryoSat-2 altimeter data are used to inverse the gravity field near Taiwan Island by the same method. Comparing with the gravity field derived from CryoSat-2, a good agreement between the two data sets is found. The global ocean gravity models and National Geophysical Data Center(NGDC) shipboard gravity data also are used to assess the performance of HY-2 A/GM data. The evaluations show that HY-2 A and CryoSat-2 are at the same level in terms of gravity field recovery and the HY-2 A/GM altimeter-derived gravity field has an accuracy of 2.922 mGal. Therefore, we can believe that HY-2 A will be a new reliable data source for marine gravity field inversion and has the potentiality to improve the accuracy and resolution of the global marine gravity field. 相似文献
73.
饶阳凹陷北部油气资源丰富、圈闭类型多样,但其原油成因类型和来源尚不明确.利用烃源岩和原油生物标志物参数特征,有效区分3套烃源岩并通过聚类分析法划分原油成因类型,建立油岩关系并探讨各类型原油分布特征.研究表明:3套烃源岩在8组生标参数上表现出明显差异.饶阳北部地区发现的原油可划分为4种类型,包括沙三型、沙三和沙一下混合型、沙一下和沙三上混合型、沙一下型.3套烃源岩的生物标志物差异反映了它们具有不同的母质类型和沉积环境.沙三型分布在任丘潜山北部任北斜坡;沙三和沙一下混合型原油分布在马西洼槽中南部;沙一下和沙三上混合型分布在马西洼槽南边的八里庄油田;沙一下型分布在研究区西部蠡县斜坡上的高阳油田.这种分布特征主要是受到源岩分布和热演化程度的控制. 相似文献