کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4532696 | 1626180 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantification of the surface brackish water layer and frontal zones in southern Chilean fjords between Boca del Guafo (43°30â²S) and Estero Elefantes (46°30â²S)
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
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چکیده انگلیسی
Using hydrographic data from the CIMAR-Fiordos cruises (1998-2001), this study quantifies the equivalent height of freshwater, emphasizing the role it plays in the potential energy anomaly and front locations, as well as its relationship with river discharges. Using a criterion of equivalent height of freshwater >15% (density <1021Â kg/m3 and salinity <28), the brackish layer was found to be 1-15Â m thick (except in Estero Elefantes), with horizontal extensions on the order of 100Â km. The limits of this layer tended to coincide with frontal zones having potential energy anomaly gradients >0.005Â J/m4. The frontal zones were located in the extreme southeast of Jacaf Channel, at the head of Ventisquero Sound, in the central part of the Puyuguapi and Moraleda channels, and at the head and mouth of Aysén Fjord. The equivalent height of freshwater and potential energy anomaly showed a good correlation with the accumulated (5-day) river discharges (r2=0.87), which were greatest toward the fjord heads in spring. The brackish surface water had short residence times (3.5 days) in Aysen Fjord, unlike the deep layer, which other authors report to have a longer residence time (near 1 year).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Continental Shelf Research - Volume 31, Issues 3â4, 1 March 2011, Pages 162-171
Journal: Continental Shelf Research - Volume 31, Issues 3â4, 1 March 2011, Pages 162-171
نویسندگان
Carolina Calvete, Marcus Sobarzo,