论文部分内容阅读
根据 2 0 0 2 ,2 0 0 0和 1999年中国南极考察和 1992年澳大利亚南极考察资料 ,分析了普里兹湾 73°E断面水团与地转流的结构及其多年变化 :(1)该断面上水团主要有南极表层水、绕极深层水、南极底层水和陆架水 ;(2 )南极表层水 1999,2 0 0 0年向北扩展最强 ,2 0 0 2年向北扩展最弱 ,绕极深层水 2 0 0 2年向南扩展也较强 ,1999和 1992年绕极深层水向南扩展较弱 ,南极底层水 ,位温在 - 0 .3～- 0 .4℃ ,盐度在 34.6 6左右 ,主要是本地形成 ,而 1992年高盐底层水可能来源于其他原因 ;(3)该海域深层水呈显著的升温 ,增暖率约为 0 .0 0 7～ 0 .0 0 8℃ /a;(4 )南极陆坡锋的强度和位置 ,与南极表层水的北向扩展和绕极深层水的变化一致 ;(5 ) 6 2°S～ 6 6°S是绕极流的南缘 ,东向流深度可达 2 0 0 0 m,最大流速中心在 6 4.5°S附近 ,2 0 0 0年北移至 6 3.5°S附近 ,最大流速为 3～ 5 cm/s;陆架上 6 8°S附近主要为流速 1cm /s左右的西向流。
Based on the data of the Chinese Antarctic Survey in 1999 and the Australian Antarctic Survey in 1992, the structure and multiyear variability of the water mass and ground currents in the 73 ° E section of Prydz Bay are analyzed: (1) This section of the water mass mainly includes the Antarctic surface water, the polar deep water, the Antarctic bottom water and the shelf water. (2) The Antarctic surface water strongest in the north of 1999 and the north of 2002 The weakest and the deepest water also expanded southwards in 2002, expanding slightly to the south in 1999 and 1992. The temperature of the Antarctic bottom water was -0.3 ~ -0.4 ℃ , The salinity is about 34.66, mainly formed locally, while the high-salt bottom water in 1992 may come from other reasons; (3) The deep water in the sea area showed a significant warming with a rate of warming of about 0.07-0.0 .0 0 8 ° C / a; (4) The strength and location of the Antarctic slope front coincide with the northward extension of the Antarctic surface water and the change of the water around the deep water; (5) 6 2 ° S ~ 6 6 ° S At the southern margin of the flow, the depth of the eastward flow reaches up to 2000 m, the maximum flow velocity centers around 6 4.5 ° S, the northward shift to 6 3.5 ° S in 2000 and the maximum flow velocity from 3 cm / s to 5 cm / s ; Main shelf near 68 ° S For the flow rate of about 1cm / s westward flow.