کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6383750 | 1626351 | 2013 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High primary productivity and f-ratio in summer in the Ulleung basin of the East/Japan Sea
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High primary productivity and f-ratio in summer in the Ulleung basin of the East/Japan Sea High primary productivity and f-ratio in summer in the Ulleung basin of the East/Japan Sea](/preview/png/6383750.png)
چکیده انگلیسی
To better understand the cause of high summer primary productivity in the Ulleung Basin located in the southwest part of the East/Japan Sea, the spatial dynamics of primary, new, and regenerated productivities (PP, NP, and RP) were examined along the path of the Tsushima Warm Current system in summer 2008. We compared hydrographic and chemical parameters in the Ulleung Basin with those of the Kuroshio Current in the Western Pacific Ocean and the East China Sea. In summer, integrated primary productivity (IPP, 0.37-0.96 g C mâ2 dâ1) and integrated new productivity (INP, 26-221 mg N mâ2 dâ1) within the euphotic zone in the Ulleung Basin were higher than those in the East China Sea and the Western Pacific Ocean (0.17-0.28 g C mâ2 dâ1, 2â5 mg N mâ2 dâ1, respectively). In contrast, there was no pronounced spatial variation in integrated regenerated productivity (IRP, 43-824 mg N mâ2 dâ1). Strong positive correlations between IPP and INP (also the f-ratio), and between nitrate uptake rate in the mixed layer and nitrate upward flux through the top of pycnocline in summer in the Ulleung Basin imply that the high IPP was mainly supported by supply of nitrate from the underlying water in the euphotic zone. Shallowing of the pycnocline depth as the current enters the East/Japan Sea facilitates nitrate supply from the nutrient-replete cold water immediately below the pycnocline through nitrate upward flux. A subsurface maximum in PP at or above the pycnocline and a high f-ratio further support the importance of this source of nitrate for maintaining the high summer PP in the Ulleung Basin. In comparison, the high PP layer was observed at the surface in the following fall and spring in the Ulleung Basin. Our results demonstrate the importance of hydrographic features in enhancing PP in this oligotrophic Tsushima Warm Current system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 79, September 2013, Pages 74-85
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 79, September 2013, Pages 74-85
نویسندگان
Jung Hyun Kwak, Jeomshik Hwang, Eun Jung Choy, Hyun Je Park, Dong-Jin Kang, Tongsup Lee, Kyung-Il Chang, Kyung-Ryul Kim, Chang-Keun Kang,