An EOF analysis of HF Doppler radar current measurements of the Chesapeake Bay buoyant outflow

G. O. Marmorino, L. K. Shay, B. K. Haus, R. A. Handler, H. C. Graber, M. P. Horne

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

Surface currents measured by HF Doppler radar as part of a study of the Chesapeake Bay outflow plume are examined using a 'real-vector' empirical orthogonal function (EOF) analysis (Kaihatu et al., 1998). Based on about 23 days of nearly continuous data, the analysis shows that the first three EOF modes, judged to be the only significant modes, account for 76% of the variance in the data set. The buoyant outflow occurs primarily in the mean flow field. The first EOF mode is dominated by wind forcing and the second mode by across-shelf semi-diurnal tidal forcing. The third mode exhibits a large-scale horizontal shear and contains a curved region of weak relative flow which appears to delineate the offshore edge of the plume; also, the third-mode response varies over the spring-neap cycle, suggesting a modulation of the outflow plume by a tidal residual eddy. The analysis therefore has provided a useful, exploratory examination of this dataset of surface currents.

Original languageEnglish (US)
Pages (from-to)271-288
Number of pages18
JournalContinental Shelf Research
Volume19
Issue number2
DOIs
StatePublished - Feb 1 1999

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Geology

Fingerprint Dive into the research topics of 'An EOF analysis of HF Doppler radar current measurements of the Chesapeake Bay buoyant outflow'. Together they form a unique fingerprint.

  • Cite this