東海長期觀測與研究(I)-控制碳通量之環境因子─子計畫四：有機碳氮之同位素組成、無機碳及氟氯化碳之分布與生地化模式之研究
Date Issued
2001
Date
2001
Author(s)
劉康克
DOI
892611M002041OP3
Abstract
This project includes two parts,
observations and modeling. Observations
include isotopic analysis of sedimentary
organic carbon and nitrogen and survey of
carbonate chemistry and chloropfluorocarbon
(CFC). The spatial distribution of
sedimentary organic carbon and isotopic
compositions sheds light on the fate of
organic matter in the East China Sea. The
carbonate chemistry enables us to study the
air-sea exchange of carbon dioxide. CFCs
may serve as water mass tracers. Box model
are used to study the water and nutrient
budget in the East China Sea shelf as the first
step of modeling work, which is to be
followed by development of 3-D numerical
model.
Regarding the biogeochemical
dynamics of carbon and nitrogen in the East
China Sea, we have studied their isotopic
compositions in sediments. The results
clearly indicate that the sedimentary organic
matter in the southern Okinawa Trough off
northeastern Taiwan is isotopically similar to
that from the inner shelf of the ECS,
suggesting the inner shelf as the main source
of sedimentary organic matter in the southern
3
Okinawa Trough. Preliminary results have
been obtained for the PCO2 and CFC
distribution in the East China Sea.
The study area for the modeling effort
comprises the contiguous continental shelf
from the Yellow Sea to the Taiwan Strait.
Efforts has been devoted to compile a
database with wider spatial coverage and
fuller temporal coverage for the model
studies. Two-box model has been constructed
to evaluate the residence times of shelf
waters in the southern and northern parts of
the ECS shelf. The southern part has rather
short residence time (3-4 months), whereas
the northern part has longer residence time
(1.3 years).
Subjects
East China Sea
organic carbon
carbon isotopes
nitrogen isotopes
CFC
box model
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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