Coastal-ocean hindcast/forecast model

Ping Chen, Yan H. Zhang, Kwang W. You, Lie Yauw Oey

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Flows in the coastal oceans are produced by interactions of different components: tides, winds, buoyancy discharge from estuaries, topography and remote forcing of deeper-ocean origin. We present here a general methodology for efficient coastal-ocean hindcast and forecast, taking advantage of the disparate time scales which exist between the different components. Tides are repetitive and can be calculated. River discharge and remote forcing are assumed to have long time scales O(months or seasons), so that they can be considered to be quasi-steady when one computes wind and density-induced flows, which have time scales of the O(1-10 days). Thus, for a given topographic region, one can first perform a long-term simulation using a general circulation model (GCM), and including as much physics and different forcing as possible. One can then decompose the density field using, for example, the method of empirical orthogonal functions (EOFs). The first few EOF modes can be correlated with the winds. Once this wind/density correlation is done, one can then use it to drive a simplified model which excludes the density calculation. The method is applied to simulate the spring and summer circulation in the New York Bight. The hindcast fields compare favorably with the true-state results obtained from the GCM.

Original languageEnglish
Title of host publicationProc 2 Int Conf Estuarine Coastal Model
PublisherPubl by ASCE
Number of pages13
ISBN (Print)0872628612
StatePublished - 1992
EventProceedings of the 2nd International Conference on Estuarine and Coastal Modeling - Tampa, FL, USA
Duration: 13 Nov 199215 Nov 1992

Publication series

NameProc 2 Int Conf Estuarine Coastal Model


ConferenceProceedings of the 2nd International Conference on Estuarine and Coastal Modeling
CityTampa, FL, USA


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