کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4531523 1626087 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of factors controlling the distribution of organic matter and phosphorus in the Eastern Arabian Shelf: A geostatistical reappraisal
ترجمه فارسی عنوان
ارزیابی عوامل کنترل توزیع مواد آلی و فسفر در عرشه شرق شرقی: یک بررسی مجدد زمین شناسی
کلمات کلیدی
کربن ارگانیک، فسفر، تولید اولیه خالص، اکسیژن آب پایین، میزان رسوب
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی


• Oxygen concentration controls the accumulation of organic carbon.
• Sedimentation rate solely outweighs the role of other depositional parameters.
• Organic matter is the major sink of phosphorus in EAS sediments.
• P accumulation is a function of sedimentation rate and bottom oxygen concentration.

The Eastern Arabian Shelf (EAS) is a region of high primary production and a part of an intense oxygen minimum zone as well. The EAS is a zone of significant accumulation of organic matter that is ascribable to either the prevalent anoxic condition or high primary productivity, There has been a considerable amount of debate on the dominant factor responsible for the enrichment of organic matter in the sediments in EAS. The present study is an attempt to resolve the issue through robust geostatistical analysis of published and unpublished data. Results of Empirical Bayesian kriging (EBK) and geographically weighted regression (GWR) of available data help to get a refined distribution of organic carbon and phosphorus in the Eastern Arabian Shelf as compared to the earlier known distribution patterns. The primary productivity, evaluated through the latest satellite dataset using Vertically Generalized Production Model, does not show any similarity with the distribution pattern of either organic carbon (Corg) or phosphorus, that was determined based on the in situ data. The negative correlations of primary production with Corg (r=−0.14) and P (r=−0.4) indicate that primary productivity is the most unlikely modulator of organic matter accumulation in the EAS. The negative correlation of bottom water oxygen concentration with Corg (r=−0.39) and Ti-normalized fraction of organic carbon (r=−0.56) indicates that anoxia plays a major role in the preservation of organic matter in the EAS. The mass accumulation rates of Corg and phosphorus show a strong dependency on sedimentation rate (r>0.88), which indicates that the accumulation rate of sediments outweighs the other depositional parameters in controlling the accumulation of organic matter in the EAS.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Continental Shelf Research - Volume 126, 1 September 2016, Pages 79–88
نویسندگان
, ,