Annual Cycle in Southern Tropical Indian Ocean Bottom Pressure

Christopher G. Piecuch; Rui M. Ponte

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Annual Cycle in Southern Tropical Indian Ocean Bottom Pressure

机译：南部热带印度洋底部压力的年周期

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The seasonal monsoon drives a dynamic response in the southern tropical Indian Ocean, previously observed in baroclinic Rossby wave signatures in annual sea level and thermocline depth anomalies. In this paper, monthly mass grids based on Release-05 Gravity Recovery and Climate Experiment (GRACE) data are used to study the annual cycle in southern tropical Indian Ocean bottom pressure. To interpret the satellite data, a linear model of the ocean's response to wind forcing-based on the theory of vertical normal modes and comprising baroclinic and barotropic components-is considered. The model is evaluated using stratification from an ocean atlas and winds from an atmospheric reanalysis. Good correspondence between model and data is found over the southern tropical Indian Ocean: the model explains 81% of the annual variance in the data on average between 10° and 25°S. Model solutions suggest that, while the annual baroclinic Rossby wave has a seafloor signature, the annual cycle in the deep sea generally involves important barotropic dynamics, in contrast to the response in the upper ocean, which is largely baroclinic.

机译：季节性季风在南部热带印度洋推动了动态响应，此前曾在年度海平面和温跃层深度异常的斜压Rossby波浪特征中观察到。本文使用基于Release-05重力恢复和气候实验（GRACE）数据的月度质量网格来研究南部热带印度洋底部压力的年循环。为了解释卫星数据，考虑了基于垂直法向模式理论的海洋对风强迫响应的线性模型，该模型包括斜压和正压分量。使用来自海洋地图集的分层和来自大气再分析的风评估模型。在南部热带印度洋上发现了模型与数据之间的良好对应关系：该模型解释了数据在10°至25°S的平均年变化中的81％。模型解决方案表明，尽管一年一次的斜压罗斯比波具有海底特征，但深海中的年循环通常涉及重要的正压动力，而上层海洋的响应则主要是斜压的。

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《Journal of Physical Oceanography》 |2014年第6期|1605-1613|共9页
作者
Christopher G. Piecuch; Rui M. Ponte;
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Atmospheric and Environmental Research, Inc., 131 Hartwell Avenue,Lexington, MA 02421.;

Atmospheric and Environmental Research, Inc., Lexington, Massachusetts;

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1. Using ocean bottom pressure from the gravity recovery and climate experiment (GRACE) to estimate transport variability in the southern Indian Ocean [J] . Jessica K. Makowski, Don P. Chambers, Jennifer A. Bonin Journal of Geophysical Research, C. Oceans: JGR . 2015,第6期

机译：利用重力恢复和气候实验（GRACE）中的海底压力来估算印度洋南部的运输变异性
2. Annual cycle of the upper-ocean circulation and properties in the tropical western Indian Ocean [J] . M Manyilizu, P Penven, CJC Reason African Journal of Marine Science . 2016,第1期

机译：热带西部印度洋中海洋循环的年度周期和性质
3. Weighing the ocean with bottom-pressure sensors: robustness of the ocean mass annual cycle estimate [J] . Joanne Williams, C. W. Hughes, M. E. Tamisiea, Ocean science . 2014,第4期

机译：用底压传感器称量海洋：海洋质量年度周期估算的稳健性
4. SEA LEVEL, BOTTOM PRESSURE AND THE DYNAMICS OF LARGE-SCALE INTERANNUAL VARIABILITY IN THE SOUTHERN OCEAN [C] . Rui M. Ponte, Christopher G. Piecuch Symposium on 20 Years of Progress in Radar Altimetry . 2013

机译：海平面，底部压力和南海大规模际变率的动态
5. Diagnosis of the marine stratocumulus cloud variability in the annual cycle over the eastern tropical Pacific and Atlantic oceans. [D] . Shin, Jinho. 2007

机译：在东部热带太平洋和大西洋的年循环中对海洋层积云的变化进行诊断。
6. Accelerated freshening of Antarctic Bottom Water over the last decade in the Southern Indian Ocean [O] . Viviane V. Menezes, Alison M. Macdonald, Courtney Schatzman 2017

机译：在过去十年中南印度洋南极海底水加快了新鲜度
7. Weighing the ocean with bottom-pressure sensors: robustness of the ocean mass annual cycle estimate [O] . Williams J, Hughes CW, Tamisiea ME, 2014

机译：用底压传感器称量海洋：海洋质量年度周期估算的稳健性

Annual Cycle in Southern Tropical Indian Ocean Bottom Pressure

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