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| 1 | Interannual variability of the Antarctic Circumpolar Current strength based on merged altimeter data显示文摘Interannual variability of the Antarctic Circumpolar Current (ACC) strength is studied in stream-coordinate with twenty-year Absolute Dynamic Topography data from satellite altimetry. The stream-coordinate projection method separates the ACC from adjacent subtropical and subpolar gyres, enabling consideration of the zonal asymmetry of the ACC rather than assuming that the ACC is a purely zonal flow. It is shown that the ACC strength has large interannual variations with two recent peaks around 2000 and 2009. The interannual variability appears mainly in the Indo-Pacific sector of the Southern Ocean and the strongest signal is located south of Australia. The intensification of the westerly wind in 1998 and 2008 appears to cause the strengthening of the ACC via baroclinic processes. | ZHANG LinLin SUN Che HU DunXin | 2012 | Chinese Science Bulletin2012，57，16： | 6 |
| 2 | Eddy properties in the Pacific sector of the Southern Ocean from satellite altimetry data显示文摘Mesoscale eddies play a key role in the ocean dynamics of the Southern Ocean, and eddy response to the climate changes has also been widely noted. Both eddy kinetic energy(EKE) and eddy detection algorithm are used to study the eddy properties in the Pacific sector of the Southern Ocean. Consistent with previous works,the maps of the EKE illustrate that higher energy confines to the Antarctic Polar Frontal Zone(APFZ) and decreases progressively from west to east. It also shows that the most significant increase in the EKE occurs in the western and central parts of the Pacific sector, where the baroclinicity of the Antarctic Circumpolar Current(ACC) is much stronger. Statistical eddy properties reveal that both of the spatial pattern and interannual variation of the EKE are primarily due to the eddy amplitude and the eddy rotational speed, rather than the eddy number or the eddy radius. In general, these results furtherly confirm that anomalous westerly wind forcing associated with the positive Southern Annular Mode(SAM) index enhances the Southern Ocean eddy activity by strengthening the eddy properties. | DUAN Yongliang LIU Hongwei YU Weidong HOU Yijun | 2016 | Acta Oceanologica Sinica2016，35，11： | 5 |
| 3 | Progress of Chinese research in physical oceanography of the Southern Ocean显示文摘Oceanographic surveying has been one of the key missions of the Chinese National Antarctic Research Expedition since 1984. Using the field data obtained in these surveys and the results from remote sensing and numerical models, Chinese physical oceanographers have investigated the water masses, fronts and circulation patterns in the Southern Ocean. The results of nearly 30 years of research are summarized in this paper. Most oceanographic observations by Chinese researchers have been conducted in Prydz Bay and the adjacent seas. CTD (Conductivity Temperature and Depth) data, collected during the past 20 years, have been applied to study several features of the water masses in this region: The spatial variation of warm summer surface water, the northward extension of shelf water, the flow of ice shelf water from the cavity beneath the Amery Ice Shelf, the upwelling of the Circumpolar Deep Water, and the formation of the Antarctic Bottom Water. The circulation and its dynamic factors have been analyzed with dynamic heights calculated from CTD data as well as by numerical models. The structure and strength of the fronts in the southeast Indian Ocean and the Drake Passage were investigated with underway XBT/XCTD (Expendable Bathythermograph/Expendable CTD) and ADCP (Acoustic Doppler Current Profiler) data. Their interannual variations have been determined and the factors of influence, especially the atmospheric forcing and mesoscale oceanic processes, were studied using remote sensing data. The dynamic mechanism of the Antarctic Circumpolar Current (ACC) was analyzed by theoretical models. The transport and pattern of the ACC have been well reproduced by coupled sea ice-ocean models. Additional details of ACC variability were identified based on satellite altimeter data. The response of the ACC to climate change was studied using reanalysis data. Prospects for future research are presented at the end of this paper. | SHI Jiuxin DONG Zhaoqian CHEN Hongxia | 2013 | Advances in Polar Science2013，24，2： | 5 |
| 4 | The low-frequency variance of the ocean surface wave field in the area of the Antarctic Circumpolar Current显示文摘The low-frequency variance of the surface wave in the area of the Antarctic Circumpolar Current (ACC) and its correlation with the antarctic circumpolar wave (ACW) are focused on. The analysis of the series of 44 a significant wave height (SWH) interannual anomalies reveals that the SWH anomalies have a strong periodicity of about 4-5 a and this signal propagates eastward obviously from 1985 to 1995, which needs about 8 a to complete a mimacircle around the earth. The method of empirical orthogonal function (EOF) is used to analyze the filtered monthly SWH anomalies to study the spatio-temporal distributions and the propagation characteristics of the low-frequency signals in the wave field. Both the dominant wavenumber-2 pattern in space and the propagation feature in the south Pacific, the south Atlantic and the south Indian ocean show strong consistency with the ACW. So it is reasonable to conclude that the ACW signal also exists in the wave field. The ACW is important for the climate in the Southern Ocean, so it is worth to pay more attention to the large-scale effect of the surface wave, which may also be important for climate studies. | ZHANG Xiaoshuang WU Kejian WANG Bin WANG Zhifeng | 2013 | Acta Oceanologica Sinica2013，32，5： | 4 |
| 5 | Improving the estimate of wind energy input into the Ekman layer within the Antarctic Circumpolar Current显示文摘Based on the data and method offered by Liu et al.(2009),the direct wind and Stokes drift-induced energy inputs into the Ekman layer within the Antarctic Circumpolar Current(ACC) area are reestimated since the results of the former have been proved to be underestimated.And the result shows that the total rate of energy input into the Ekman-Stokes layer within the ACC area is 852.41 GW,including 649.75 GW of direct wind energy input(76%) and 202.66 GW of Stoke drift-induced energy input(24%).Total increased energy input,due to wave-induced Coriolis-Stokes forcing added to the classical Ekman model,is 52.05 GW,accounting for 6.5% of the wind energy input into the classical Ekman layer.The long-term variability of direct wind and Stokes drift-induced energy inputs into the Ekman layer within the ACC is also investigated,and the result shows that the Stokes drift hinders the decadal increasing trend of direct wind energy input.Meanwhile,there is a period of 4-5 a in the energy spectrums,as same as the Antarctic circumpolar wave. | ZHANG Yuming WU Kejian ZHANG Xiaoshuang BI Fan SONG Zhaoyang LIU Shouhua | 2013 | Acta Oceanologica Sinica2013，32，3： | 3 |
| 6 | 北太平洋海表面高度(SSH)与风应力变化的关系显示文摘利用1958—2008年的北太平洋海表面高度和风应力资料,并与ENSO和PDO指数进行相关分析。结果发现,风应力及其经向分量主要通过季节振动影响海表面高度(SSH)的年周期变化,纬向风应力主要通过多年振动影响SSH的ENSO和PDO周期。纬向风应力和SSH均以黑潮延伸体主轴为界,两侧呈现出相反的升降趋势,SSH为北降南升,纬向风应力南降北升。风应力和SSH升降趋势相同,均表现为'上升—下降—上升'的变化特征。在地形变化剧烈、等深线南北分布的海区,西风增强会导致SSH升高,且西侧升高较为明显。北风增强将导致北太平洋西岸SSH升高,东岸SSH降低。 | 黄琳 孙佳 杨逸秋 袁逸凡 | 2013 | 海洋与湖沼2013，44，1： | 2 |
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