Synoptic Lagrangian maps: Application to surface transport in Monterey Bay

被引:31
|
作者
Lipphardt, B. L., Jr. [1 ]
Small, D.
Kirwan, A. D., Jr.
Wiggins, S.
Ide, K.
Grosch, C. E.
Paduan, J. D.
机构
[1] Univ Delaware, Coll Marine Studies, Newark, DE 19716 USA
[2] Univ Bristol, Sch Math, Bristol BS8 1TH, Avon, England
[3] Univ Calif Los Angeles, Dept Atmospher Sci, Los Angeles, CA 90095 USA
[4] Old Dominion Univ, Ctr Coastal Phys Oceanog, Norfolk, VA 23529 USA
[5] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA
关键词
D O I
10.1357/002224006777606461
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Here we report on an effort to describe in detail the evolution of surface water particles in Monterey Bay from the time they first enter until the time they leave. The data used for this study are objective mappings from hourly surface currents obtained from high frequency (HF) radar measurements in Monterey Bay for the period 2 June through 4 August 1999. The basic concept is simple: compute the origin and fate of a large number of particles for every hour during the analysis period. However, analyzing and displaying the enormous amount of computed trajectory information required a new data compression technique: synoptic Lagrangian maps produced by representing each trajectory by its origin/fate and its residence time. The results show unexpected complexity and variability not apparent in the Eulerian current archive. For example, the fraction of particles that escaped to the open ocean during this period varied from about 17 to more than 92 percent. Mean particle residence times ranged from 4.5 to 11 days. The distribution of particle residence times and transport pathways varied over time scales from hours to weeks, and space scales from 2 to 40 km. The wide range of variability in particle properties reported here shows that surface transport studies in Monterey Bay require detailed wind and tidal current information over the entire bay, as well as information about the flow along the open ocean boundary.
引用
收藏
页码:221 / 247
页数:27
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