Upper circulation in Bone Bay and its relation to biogeochemical distribution: from observation and model

3rd EMBRIO International Workshop on Marine Biodiversity: Understanding, Utilization, Conservation

生态环境科学

Widyastuti, P.^1^3 ; Atmadipoera, A.S.^1 ; Nurjaya, I.W.^1 ; Natih, N.M.^1 ; Priatna, A.^2

Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Bogor, Indonesia^1

Centre for Fisheries Research, Agency for Marine and Fisheries Research and Human Resources, Ministry of Marine Affairs and Fisheries, Indonesia^2

PT Hatfield Indonesia, Bogor, Indonesia^3

关键词: Biogeochemical;    Chlorophyll a;    Field observations;    Low currents;    observation;    Physical mechanism;    Transport modeling;    Water circulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/278/1/012080/pdf
DOI  :  10.1088/1755-1315/278/1/012080

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The surrounding waters and the physical mechanisms within the ocean are playing a major role to bring nutrients to Bone Bay, field observation in October 2014 and analysis of numerical modeling were conducted in order to understand the pattern of water circulation, as well as the variability of seawater transport and its impacts to the biogeochemical distribution. The results of the observation show that the distribution of salinity is lower in locations closest to the gulf (Transect A) and higher towards the furthest locations from the gulf (Transect D), followed by the pattern of other parameters (temperature, dissolved oxygen, and chlorophyll-a). This happened due to the low current speed in the Flores Sea during the time of observation hence no water flowed into the gulf which was dominated by freshwater from rivers. It is confirmed by the transport model that shows that seawater is transported strongly to the north from January to March and due to the topography at the mouth of the gulf, the water accumulates and forms an eddy which transports water to the south in April until the next few months. This explains the distribution of phytoplankton and zooplankton inside the gulf from January to March.