期刊
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
卷 48, 期 6, 页码 1347-1373出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0967-0637(00)00085-6
关键词
sampling strategy; data analysis; vertical motion; quasi-geostrophic motion, synopticity; relocation
类别
The quantification of vertical motion and vertical fluxes is essential in our ability to predict and tolerate climate change. However, diagnostic estimations might be affected by the errors arising from the necessary compromise between spatio-temporal resolution and cost of hydrographic surveys. Observations of a numerical ocean model have been made in order to test the accuracy of different sampling strategies and their possible a-posteriori corrections. A simple first-order correction method, computing a pseudo-synoptic data set from a non-synoptic data set and involving a geostrophic relocation of the stations is shown to correct significantly the synopticity error in hydrographic data, derived QG vertical motion and vertical temperature fluxes. Sensitivity analyses also show that the lack of synopticity is more critical than other factors, including the sampling resolution, the level of no-motion and the analysis. (C) 2001 Elsevier Science Ltd. All rights reserved.
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