全文获取类型
收费全文 | 72篇 |
免费 | 0篇 |
专业分类
测绘学 | 1篇 |
大气科学 | 6篇 |
地球物理 | 30篇 |
地质学 | 21篇 |
海洋学 | 7篇 |
天文学 | 5篇 |
自然地理 | 2篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 2篇 |
2014年 | 1篇 |
2013年 | 2篇 |
2011年 | 6篇 |
2010年 | 5篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 5篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1984年 | 2篇 |
1982年 | 1篇 |
排序方式: 共有72条查询结果,搜索用时 0 毫秒
71.
Naoto Takahata Yuji Sano Keika Horiguchi Kotaro Shirai Toshitaka Gamo 《Journal of Oceanography》2008,64(2):293-301
We have collected fifty-five seawater samples at seven stations at various depths in the Yamato and Japan Basins of the Japan
Sea and measured their helium isotopic ratios. The 3He/4He ratios vary from 0.997 Ratm to 1.085 Ratm where Ratm is the atmospheric ratio. The maximum 3He excesses about 8%, are observed at mid-depth (1000 m), and these values are significantly lower than those observed in
deep Pacific waters. This implies that mantle-derived helium in deep Pacific water cannot enter the Japan Sea since it is
an almost landlocked marginal sea. The observed 8% excess 3He may be attributable to the decay product of tritium. Slightly higher 3He/4He ratios in the Bottom Water were observed in the Yamato Basin than in the Japan Basin. The ventilation ages of seawater
shallower than 1000 m are calculated as about 5 to 20 years, which is consistent with the CFC ages reported in the literature.
There is a positive correlation between the apparent oxygen utilization and 3H-3He ages. The estimated oxygen utilization rate from the correlation in a layer between 500 m and 1000 m is about 3 μmol/kg/yr, which is similar to that in the eastern subtropical North Atlantic. 相似文献
72.
Yasushi Fukamachi Kay I. Ohshima Naoto Ebuchi Tadao Bando Kazuya Ono Minoru Sano 《Journal of Oceanography》2010,66(5):685-696
Time-series data of the vertical structure of the Soya Warm Current (SWC) were obtained by a bottom-mounted acoustic Doppler
current profiler (ADCP) in the middle of the Soya Strait from September 2006 to July 2008. The site of the ADCP measurement
was within the coverage of the ocean-radar measurement around the strait. The volume transport of the SWC through the strait
is estimated on the basis of both the vertical structure observed by the ADCP and the horizontal structure observed by the
radars for the first time. The annual transport estimates are 0.62–0.67 Sv (1 Sv = 106 m3s−1). They are somewhat smaller than the difference between the previous estimates of the inflow and outflow through other straits
in the Sea of Japan, and smaller than those obtained in the region downstream of the strait during 2004–05 (0.94–1.04 Sv).
The difference in the two periods may be attributed to interannual variability of the SWC and/or the different measurement
locations. 相似文献