排序方式: 共有7条查询结果,搜索用时 15 毫秒
1
1.
2012年1月25日方位:37°43、5′S,154°40、1′E航向:航向150°航速:7节经过两天的调整,大家都恢复到航海状态,中午准备做米饭好好吃点,因为昨天没有做饭。米放入锅里,我拿了5升水的桶准备往里倒,船倾斜太厉害大约有20度,我稳定了一下双手举起桶,刚倒了一点突然船向右猛地掀了一下,整个人 相似文献
2.
3.
4.
From the synopical CTD sections in the WOCE PR11 repeated cruises, the South Pacific Subtropical Mode Water (SPSTMW) has been identified in the region of the Tasman Front Extension (TFE) around 29?S to the east of Australia. In the depth range of 150-250 m, the SPSTMW appears as a thermostad with vertical temperature gradient lower than 1.6℃(100 m)-1 and a tem- perature range of 16.5-19.5℃ and as a pycnostad with PV lower than 2×10-10 m-1 s-1 and a potential density range of 25.4-26.0 kg m-3. Like the subtropical mode waters in the North Atlantic and North Pacific, the formation of the SPSTMW is associated with the convective mixing during the austral wintertime as manifested from the time series of the Argo floats. And cold water entrains into the mixed layer with the deepening mixed layer from September to the middle of October. During the wintertime formation process, mesoscale eddies prevailing in the TFE region play an important role in the SPSTMW formation, and have a great effect on the SPSTMW distribution in the next year. The deeper (shallower) mixed layer in wintertime, consistent with the depressed (uplifted) permanent thermocline, is formed by the anticyclonic (cyclonic) eddies, and the substantial mode water thicker than 50 m is mainly found in the region of the anticyclonic eddies where the permanent thermocline is deeper than 450 m. 相似文献
5.
深部地壳反射的双程走时在6~20s之间,特征为信噪比低、频率低(5~30Hz)。要想获得最优化的反射信号要求如下:1;震源能量集中在这个频段;2;检波器排列尽可能长;3;炮间距尽可能短。用一个气枪阵列模拟程序来观察一个由10枪组成的枪阵在不同深度发射时的效果。实验证明:将同一枪阵沉放到25m深处,可以增强低频端震源能量,此时深部反射层的信噪比比枪阵沉放深度为7.5m的提高一倍,只是其纵向分辩率有所 相似文献
6.
7.
塔斯曼海位于西南太平洋地区,处于印度-澳大利亚板块和西兰板块之间,大地构造背景复杂。该地区是全球油气资源勘探的重点海域之一,但是国内对该地区的研究相当匮乏。本文根据塔斯曼海海域的自由空气重力异常对塔斯曼海海域的构造单元进行了划分,前人关于塔斯曼海的研究主要集中在Resolution海岭北部,我们认为塔斯曼海的范围应包括Resolution海岭以南,麦夸里海岭以西,塔斯曼断裂带以东的区域(即南部次盆)。结果显示,塔斯曼海域及邻区包括3个一级构造单元:东澳大利亚陆缘、西兰板块和塔斯曼海盆,且塔斯曼海盆可进一步划分为西部次盆、东部次盆和南部次盆。本文基于塔斯曼海域90 Ma以来的洋壳年龄数据编制了构造演化图,将塔斯曼海的形成演化过程分为4个阶段:(1)中生代陆内裂谷期(90~83 Ma BP);(2)塔斯曼海扩张阶段(83~61 Ma BP);(3)塔斯曼海北部扩张停止阶段(61~52 Ma BP);(4)塔斯曼海南部改造阶段(52 Ma BP至今)。 相似文献
1