کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8884272 1626298 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Near 7-day response of ocean bottom pressure to atmospheric surface pressure and winds in the northern South China Sea
ترجمه فارسی عنوان
نزدیک به 7 روز پاسخ فشار پایین اقیانوس به فشار سطحی در جو و باد در شمال دریای جنوبی
کلمات کلیدی
فشار پایین اقیانوس اکو صدای معکوس معکوس فشار، فشار سطحی در هوا، باد، اکمن پمپاژ / مکش، دریای چین جنوبی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
Ocean bottom pressures, observed by five pressure-recording inverted echo sounders (PIESs) from October 2012 to July 2014, exhibit strong near 7-day variability in the northern South China Sea (SCS) where long-term in situ bottom pressure observations are quite sparse. This variability was strongest in October 2013 during the near two years observation period. By joint analysis with European Center for Medium-Range Weather Forecasts (ECMWF) data, it is shown that the near 7-day ocean bottom pressure variability is closely related to the local atmospheric surface pressure and winds. Within a period band near 7 days, there are high coherences, exceeding 95% significance level, of observed ocean bottom pressure with local atmospheric surface pressure and with both zonal and meridional components of the wind. Ekman pumping/suction caused by the meridional component of the wind in particular, is suggested as one driving mechanism. A Kelvin wave response to the near 7-day oscillation would propagate down along the continental slope, observed at the Qui Nhon in the Vietnam. By multiple and partial coherence analyses, we find that local atmospheric surface pressure and Ekman pumping/suction show nearly equal influence on ocean bottom pressure variability at near 7-day periods. A schematic diagram representing an idealized model gives us a possible mechanism to explain the relationship between ocean bottom pressure and local atmospheric forcing at near 7-day periods in the northern SCS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 132, February 2018, Pages 6-15
نویسندگان
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