Climate Change Data Portal
| DOI | https://doi.org/10.1594/PANGAEA.891476 |
| CTD and current meter data from SONNE cruises SO239 and SO240 | |
| van Haren; Hans | |
| 发布日期 | 2018-06-28 |
| 数据集类型 | dataset |
| 英文简介 | A 400m long array with 201 high-resolution NIOZ temperature sensors was deployed above a north-east equatorial Pacific hilly abyssal plain for 2.5 months. The sensors sampled at a rate of 1Hz. The lowest sensor was at 7m above the bottom (ma.b.). The aim was to study internal waves and turbulent overturning away from large-scale ocean topography. Topography consisted of moderately elevated hills (a few hundred metres), providing a mean bottom slope of one-third of that found at the Mid-Atlantic Ridge (on 2km horizontal scales). In contrast with observations over large-scale topography like guyots, ridges and continental slopes, the present data showed a well-defined near-homogeneous "bottom boundary layer". However, its thickness varied strongly with time between < 7 and 100ma.b. with a mean around 65ma.b. The average thickness exceeded tidal current bottom-frictional heights so that internal wave breaking dominated over bottom friction. Near-bottom fronts also varied in time (and thus space). Occasional coupling was observed between the interior internal wave breaking and the near-bottom overturning, with varying up- and down- phase propagation. In contrast with currents that were dominated by the semidiurnal tide, 200m shear was dominant at (sub-)inertial frequencies. The shear was so large that it provided a background of marginal stability for the straining high-frequency internal wave field in the interior. Daily averaged turbulence dissipation rate estimates were between 10−10 and 10−9m2s−3, increasing with depth, while eddy diffusivities were of the order of 10−4m2s−1. This most intense "near-bottom" internal-wave-induced turbulence will affect the resuspension of sediments. |
| 空间范围 | Median Latitude: 11.847188 * Median Longitude: -116.972596 * South-bound Latitude: 11.840000 * West-bound Longitude: -117.014830 * North-bound Latitude: 11.860670 * East-bound Longitude: -116.944500 |
| 时间范围 | 2015-03-10T06:00:00 - 2015-06-08T11:46:00 |
| 语种 | 英语 |
| 国家 | 国际 |
| 学科大类 | 气候变化 |
| 学科子类 | 气候变化 |
| 文献类型 | 数据集 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/215230 |
| 推荐引用方式 GB/T 7714 | van Haren,Hans. CTD and current meter data from SONNE cruises SO239 and SO240.2018-06-28.https://doi.org/10.1594/PANGAEA.891476. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [van Haren]的文章 |
| [Hans]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [van Haren]的文章 |
| [Hans]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [van Haren]的文章 |
| [Hans]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
