Nearshore circulation and synthetic aperture radar: An exploratory study

Autor:	D. E. Kelley, K. R. Thompson, B. Topliss, R. Leal, D. Sturley
Rok vydání:	1998
Předmět:	Synthetic aperture radar geography geography.geographical_feature_category Flood myth Advection Ocean current Racing slick Longshore drift General Earth and Planetary Sciences Physical geography Stage (hydrology) Cove Geomorphology Geology
Zdroj:	International Journal of Remote Sensing. 19:1161-1178
ISSN:	1366-5901 0143-1161
DOI:	10.1080/014311698215667
Popis:	We use a sequence of synthetic aperture radar (SAR) images to map differences in the flood and ebb tidal currents in a cove along the coast of Nova Scotia, Canada. The asymmetry in the tidal flow determines the flushing rate of the cove which, in turn, has a significant effect on biological production within the cove and its potential for aquaculture. We find significant differences in the SAR images collected on flood and ebb tides. Specifically there are well-defined lines on the flood images and large whorls on the ebb. A three-dimensional hydrodynamic model of the tidal currents is used to interpret the SAR images. In particular we use the model flow fields to wind back the SAR images to an earlier stage of the tide in an attempt to determine the physical origin of the features in the images. We conclude that the most likely explanation for the ebb-tide whorls is the advection of surface slicks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e007570fa92282999813f435c0a45c49 https://doi.org/10.1080/014311698215667 Zobrazit plný text záznamu