| DENG Zeng'an,WEI Guanghao,YU Ting,WEI Hongyu,KANG Linchong,HAN Luyao.The diapycnal mixing in the upper Pacific estimated from GTSPP observations[J].Acta Oceanologica Sinica,2016,35(1):46-52 |
| 利用全球温盐观测剖面计划资料估算太平洋上层跨等密度面混合 |
| The diapycnal mixing in the upper Pacific estimated from GTSPP observations |
| 投稿时间：2014-10-22 修订日期：2015-03-09 |
| DOI：10.1007/s13131-016-0795-z |
| 中文关键词: 跨等密度面混合 全球温盐观测剖面计划 精细尺度参数化 太平洋 |
| 英文关键词:diapycnal mixing GTSPP fine-scale parameterization Pacific |
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| 中文摘要: |
| 基于全球多年来积累的大量温盐观测剖面计划资料,利用精细尺度参数化方案估算了太平洋上层600米区域内的跨等密度面混合系数。结果表明,在不同季节跨等密度面混合系数的整体分布类似,但是细节上存在很大的不同。跨等密度面混合系数的加强与底部摩擦、海表面近惯性能量输入、赤道效应等因素密切相关。由于粗糙的地形,混合在东北太平洋门多西诺断裂带附近存在明显加强。同时,在南大洋西风带区域,由于大风引起的近惯性能量输入也导致了混合的强化。 与前人的研究结果相比,本文的估算具有更好的空间覆盖率以及更高的分辨率,更重要的是我们的结果体现了季节性变化。由于我们给出的是网格化产品,非常适合在数值模式中的应用。 |
| 英文摘要: |
| Diapycnal mixing (DM) in the upper 600 m of the Pacific Ocean was estimated based on the huge amount of the observations from Global Temperature-Salinity Profile Programme (GTSPP), using the strain version of the finescale parameterization. It is found that DM in each season exhibits similar distribution pattern, but differs in details. The intensification of DM is related to bottom roughness, surface near-inertial energy, and proximity to the equator. The intensified DM caused by rough topography shows in the profiles near the Mendocino fracture zone in the northeast Pacific, and the heightened DM caused by wind-generated near-inertial energy appears in the westerly region of the Southern Ocean. As compared to previous estimates, the DM estimate in this work has better spatial coverage and finer resolution, and more importantly it contains the seasonal variability. Furthermore, the resulting DM dataset is gridded, rendering it suitable for modeling applications. |
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