文章基本信息

标题：Spatial-Temporal Variability of Chlorophyll-a Concentration in Cenderawasih Bay and Surrounding Waters
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作者：Alianto ; Baigo Hamuna
期刊名称：Journal of Applied Geospatial Information
电子版ISSN：2579-3608
出版年度：2020
卷号：4
期号：2
页码：343-349
DOI：10.30871/jagi.v4i2.2003
语种：English
出版社：Politeknik Negeri Batam
摘要：Chlorophyll-a is one of the parameters determining the primary productivity of water. In the fisheries sector,information on chlorophyll-a concentration in marine waters is very important for the prediction of fishing grounds. This study aims to analyze the variability of chlorophyll-a concentrations in Cenderawasih Bay and the surrounding waters,both spatial and temporal variability. Data from the AquaMODIS Level 3 monthly composite period from January to December 2019 was used to determine the concentration of chlorophyll-a. Time-series data are used to determine fluctuations of chlorophyll-a concentrations,while interpolation with the kriging method is used to determine the spatial distribution of chlorophyll-a. The analysis showed that the monthly average value of chlorophyll-a concentration in the study area ranged from 0.1988 – 0.3415 mg.m-3 . The average value of chlorophyll-a concentration increases from March to June and then decreases in July or August. The highest average chlorophyll-a concentration was in March and the lowest in January. The maximum chlorophyll-a concentration in April and the minimum in August,which is around 9.1089 mg.m-3 and 0.0975 mg.m-3 , respectively. The concentration of chlorophyll-a in Cenderawasih Bay and its surrounding waters is dominated by a low concentration,which ranges 0.1482 – 0.3158 mg.m-3 . Generally,the variability of chlorophyll-a concentrations in the study area is influenced by seasons. The average chlorophyll-a concentration is high in the Transition I (West-east) and East seasons and will decrease in Transition II (East-West) until the West season. Spatially,chlorophyll-a concentrations in coastal areas are higher than in offshore waters. High chlorophyll-a concentrations are found around the border between Nabire Regency and Waropen Regency. The amount of run-off flow that supplies nutrients from the mainland greatly affects the high concentration of chlorophyll-a in the coastal area. .
关键词：Chlorophyll-a concentration;Spatial distribution;Aqua-MODIS; Monthly composite;Cenderawasih Bay