基于海洋分析资料的吕宋海峡水交换的月际变化特征  

Monthly Variation Characteristics of Water Exchange Based on the Analyzed Ocean Data in the Luzon Strait

作　　者：韩钦臣[1] 康建成[1] Han Guoqi 王国栋[1] 朱炯[1] 

机构地区：[1]上海师范大学城市生态与环境研究中心,上海200234 [2]Fisheries and Oceans Canada Northwest Atlantic Fisheries Centre St.John's,NL,A1C 5X1,Canada

出　　处：《地球科学进展》2015年第5期609-619,共11页Advances in Earth Science

基　　金：国家自然科学基金项目“东海黑潮区温、盐、流、海面高度多尺度变化过程及其机理研究”(编号:41340045);上海市教委重点学科建设项目“地理学与城市环境”(编号:J50402)资助

摘　　要：利用1993--2006年1～12月AIPO （The joining area of Asia and Indian-Pacific Ocean）流场数据，分析了吕宋海峡120。E断面水交换流速结构的平均月际变化特征，并计算了通过该断面的水通量，探讨了水通量及其垂向结构的月际和季节变化特征。结果表明：①在断面的南北方向，西向流和东向流分别大致以19．5°N和21．5°N线为界，二者交替相间分布，呈“两进（西向流入南海）两出（东向流出南海）”的结构；21．5°N以南的300m以深和21．5°N以北的1000m以浅海域，常年存在南海水东向流入太平洋。②上层、深层和整个断面的净水通量几乎均为西向流，净水通量冬季最大，春季和秋季次之，夏季最小。中层除12月外，其他各月的净水通量均为东向流出南海，净水通量春季最大，夏季和秋季次之，冬季最小。③整个断面的净水通量，1～5月和8～11月呈“三明治”结构，6～7月呈2层结构；12月呈单层结构，年平均呈“三明治”结构。The characteristics of the average monthly variation of the velocity distribution of water exchange across the 120~E section in the Luzon Strait is analyzed. The volume transport of this water exchange is calculated, the monthly and seasonal variation structure of the volume transport and its vertical structure are discussed based on the AIPO （The joining area of Asia and Indian-Pacific Ocean）data from 1993 to 2006. The results show that：①In the north-south direction of the section, the boundary of the westward flow is located at near 19.5°N, while the boundary of the eastward flow is located at near 21.5°N. The velocity distribution of the westward and eastward /lows alternate, is characteristic of a two-in（ west to flow into the South China Sea）-two-out（out of the South China Sea） structure. The water of the South China Sea flows into the Pacific Ocean to the east direction each month throughout the year, in the area as deep as more than 300 m in south of 21.5°N, and less than 1 000 m in north of 21.5°N. ②Almost all the net volume transports in the upper, the deeper and the full depth layers flow westward, which claim the largest in winter, followed by autumn and spring, and with a minimum in summer. The net volume transport of the middle layer is the largest in spring, followed by summer and autumn, with a minimum in winter. ③The net volume transport of the entire section, features a sandwich structure in January-May and August-Novem- ber, a two-layer structure in June and July, and a single-layer structure in December. Averagely within a year, the annual average structure of the net volume transport presents a sandwich structure.

关 键 词：吕宋海峡 南海 西北太平洋 水交换 水通量 

分 类 号：P722.7[天文地球—海洋科学]