Coastal-ocean hindcast/forecast model

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

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

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.

原文???core.languages.en_GB???
主出版物標題Proc 2 Int Conf Estuarine Coastal Model
發行者Publ by ASCE
頁面175-187
頁數13
ISBN(列印)0872628612
出版狀態已出版 - 1992
事件Proceedings of the 2nd International Conference on Estuarine and Coastal Modeling - Tampa, FL, USA
持續時間: 13 11月 199215 11月 1992

出版系列

名字Proc 2 Int Conf Estuarine Coastal Model

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???event.eventtypes.event.conference???Proceedings of the 2nd International Conference on Estuarine and Coastal Modeling
城市Tampa, FL, USA
期間13/11/9215/11/92

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