کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6384764 | 1626636 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
18-year variability of ultraviolet radiation penetration in the mid-latitude coastal waters of the western boundary Pacific
ترجمه فارسی عنوان
تغییرات 18 ساله نفوذ اشعه ماوراء بنفش در آبهای ساحلی میانه ای از مرزهای غربی اقیانوس آرام
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کلمات کلیدی
اشعه ماوراء بنفش، بیو اپتیک، فصلی، آب های ساحلی، ژاپن،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
The 18-year time-series shows in situ ultraviolet radiation (UVR) and photosynthetically active radiation (PAR) diffuse attenuation coefficient Kd(λ) have recurrent seasonal variability of high/low attenuation during summer/winter months, respectively, dependent on variability in water column stratification and concentrations of bio-optical properties. The mid-latitude coastal survey station displayed significant seasonality of the mixed layer depth (MLD) between 12 and 82 m which modified the distribution of chlorophyll a (4.6-24.9 mg mâ2) and absorption of colored dissolved organic matter [aCDOM(320 nm) 0.043-1.34 mâ1]. The median Kd(320 nm) displayed significant seasonality at 0.19-0.74 mâ1 (C.V. = 44.1%) and seasonal variability within the euphotic layer [Z10%(320 nm) = 7-20%]. High attenuation of UVR with relatively moderate attenuation of PAR was consistently observed during the summer months when increased concentrations of terrestrially derived CDOM coupled with a shallow MLD were present. The winter season showed the opposite of low UVR and PAR attenuation due to a relatively deeper MLD coupled with low concentrations of bio-optical properties. Although the long term Kd(λ) did not vary significantly during the time-series, analysis of the interannual variability suggests there are positive and negative phases following the Pacific Decadal Oscillation (PDO) vis-a-vis variability in bio-optical properties (p < 0.001).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 160, 5 July 2015, Pages 1-9
Journal: Estuarine, Coastal and Shelf Science - Volume 160, 5 July 2015, Pages 1-9
نویسندگان
Victor S. Kuwahara, Sena Nozaki, Junji Nakano, Tatsuki Toda, Tomohiko Kikuchi, Satoru Taguchi,