کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1227916 | 968440 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Distribution of humic substances dissolved and particulated in water column in Ross Sea, Antarctica
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Dissolved (DFA) and particulate (PFA) fulvic acids were studied in some areas of the Ross Sea (Antarctica) characterised by different water masses. Our interest was focused on their distribution in the water column. Moreover, their correlation with fluorescence data and structural characterisation in relation to the water masses was also studied. We found that PFA concentration was mainly influenced by the primary production in surface layers and by stratification of water masses along the water column. Conversely, the DFA are less influenced by primary production and by the stratification of the water masses. An early stage of the humification process can be hypothesised for PFA related to DFA as shown by elemental analyses and spectroscopic data. PFA collected in the bottom depths of the water column showed a relationship with age of water mass (the highest concentration was found for the oldest circulating water mass (CDW)). This relationship was not observed for DFA. Moreover, any significant difference in structure was found in the DFA and PFA extracted from samples collected at bottom depths.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 96, Issue 2, November 2010, Pages 218-224
Journal: Microchemical Journal - Volume 96, Issue 2, November 2010, Pages 218-224
نویسندگان
Nicoletta Calace, Andrea Casagrande, Sabrina Mirante, Bianca Maria Petronio, Marco Pietroletti,