2008年加拿大海盆次表层暖水的精细结构的研究

曹勇; 赵进平

2008年加拿大海盆次表层暖水的精细结构的研究

曹勇,
赵进平

中国海洋大学物理海洋重点实验室 ,山东青岛 266100

基金项目: 国家自然科学基金项目(40631006;40976111;40876003)。

计量
- 文章访问数: 1869
- HTML全文浏览量: 16
- PDF下载量: 1460
- 被引次数: 0
出版历程
- 收稿日期: 2010-08-22

Study on the fine structure of near surface temperature maximum in the Canada Basin in 2008

Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao 266100,China

摘要

摘要: 自2004年以来,在加拿大海盆频繁发生的次表层暖水(near surface temperature maximum,NSTM)现象是北极快速变化响应的事实之一。采用2008年中国第3次北极科学考察的CTD数据和西北冰洋联合研究计划与美国波弗特环流观测系统计划2008年航次的CTD数据以及冰浮标ITP18数据,对加拿大海盆的NSTM现象进行了精细结构的分析。结果表明,NSTM的温度垂直结构与海冰关系密切,在海冰密集度较大的区域,发展成熟的NSTM的盐跃层稳定,温度极大值均小于-1.0℃,而且垂向温度结构差异不大,多为典型的单峰结构;在海冰边缘区和开阔水域,由于受气象条件的影响较大,盐跃层不十分稳定,温度极大值和温度的垂向分布差异较大,常出现双峰甚至多峰结构。NSTM温度极大值出现的深度不仅与NSTM发生、发展的时间有关,而且与纬度有关,纬度越高,深度越深。NSTM的发生、发展和消衰的时间尺度为1 a,夏季发生,秋季和冬季不断向表层和下层传递热量,温度峰值变小,第二年的春季消失。
- 加拿大海盆 /
- 次表层暖水 /
- 精细结构 /
- 海冰变化
Abstract: The phenomena of near surface temperature maximum (NSTM) occurred continually in the Canada Basin from 2004, which is one of the responses to the rapid change of the arctic. The fine structures of the NSTM are studied using the CTD data by the third National Arctic Research expedition of China(CHINARE) and the joint west arctic climate study (JWACS) and the Beaufort Gyre exploration project (BGEP) and ITP18 data collected in 2008 in the Canada Basin. The vertical properties of the NSTM are related to the sea ice. In the sea ice covered area there is little difference of the NSTM. But the differences of the maximum of temperature and the vertical structures of the NSTM are obvious in the marginal ice zone and the open water. The maximum temperature and the corresponding depth are related to not only the period of the NSTM, but the latitude of stations. The higher the latitude, the deeper the corresponding depth of the maximum temperature of the NSTM. The annual period of the NSTM is shown by ITP data, which occurrs in summer and disappears in spring in next year.
- Canada Basin /
- near surface warm water /
- fine structure /
- sea ice variation

HTML全文

参考文献(14)

STEEL M,MORION J,ERMOLD W,et al. Circulation of summer Pacific halocline water in the Arctic Ocean[J]. J Geophys Res, 2004,109: C02027, doi:10 1029/2003JC002009.

SHIMADA K,CARMACK E C,HATAKEYAMA K,et al. Varieties of shallow temperature maximum waters in the western Canadian Basin of the Arctic Ocean [J]. Geophys Res Lett, 2001,28:3441—3444.

COACHMAN L K, AAGAARD K, TRIPP R B. Bering Strait: The Regional Physical Oceanography[M]. Seattle: Univ of Wash, 1975:172.

SWIFT J H, JONES E P, AAGAARD K,et al. Waters of the Makarow and Canada Basins[J]. Deep-Sea Res: Ⅱ, 1997,44:1503—1529.

WALSH J E,HIBLER W D, ROSS B.Numerical simulation of Northern Hemisphere sea ice variability, 1951—1980[J] . J Geophys Res, 1985, 90: 4847—4865.

ZHAO Jin-ping, SHI Jiu-xin, Gao Guo-ping, et al. Water mass of the northward throughflow in the Bering Strait in the summer of 2003 [J]. Acta Oceanologica Sinica, 2006, 25(2):25—32.

SHI Jiu-xin, CAO Yong, GAO Guo-ping, et al. Distributions of Pacific-origin waters in Canada Basin in summer, 2003[J]. Acta Oceanologica Sinica, 2005,24(6): 12—24.

赵进平, 史久新, 矫玉田. 夏季北冰洋海冰边缘区海水温盐结构及其形成机理的理论研究[J]. 海洋与湖沼, 2003, 34(4):375—388.

JACKSON J M, CARMACK E C, McLAUGHLIN F A, et al. Identification, characterization and change of the near-surface temperature maximum in the Canada Basin, 1993—2008[J]. Journal Geophysical Research, 2010,115,Co5021,doi: 10,1029/2009JC005265.

MAYCUT G A, MCPHEE M G. Solar heating of the arctic mixed layer[J]. J Geophs Res, 1995,100:24691—24703.

KADKO D. Modeling the evolution of the arctic mixed layer during the fall 1997 surface heat budget of the Arctic Ocean (SHEBA) project using measurements of ⁷Be[J]. J Geophys Res, 2000,105(C2):3369—3378.

王翠, 赵进平. 夏季北冰洋无冰海域次表层暖水结构的形成机理[J]. 海洋科学进展,2004,22(2):130—137.

陈志华,赵进平.北冰洋次表层暖水形成机制的研究[J]. 海洋与湖沼,2010,41(2):167—174.

CAO Yong, SU Jie, ZHAO Jin-ping, et al. The study on near surface temperature maximum in the Canada Basin for 2003—2008 in response to sea ice variations //Proceedings of the Twentieth (2010) International Offshore and Polar Engineering Conference,Beijing,China,2010.

施引文献

资源附件(0)

访问统计