Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/148436
Title: Spatial and temporal characteristics of chromophoric dissolved organic matter and its relation to light attenuation in the Singapore strait
Authors: Lim, Marcus Kian Yew
Keywords: Science::Chemistry::Biochemistry::Water analysis
Issue Date: 2021
Publisher: Nanyang Technological University
Source: Lim, M. K. Y. (2021). Spatial and temporal characteristics of chromophoric dissolved organic matter and its relation to light attenuation in the Singapore strait. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/148436
Abstract: Chromophoric Dissolved Organic Matter (CDOM) strongly absorbs light in the UV-blue region and may reduce light availability in the water column, especially in coastal waters where concentrations of CDOM are high due to input from terrestrial sources. Where this CDOM comes from, and how much it may affect light availability in the water column in the Singapore Strait remains to be discovered. This study proposes a remote sensing approach to observe long-term and seasonal patterns in CDOM concentrations within the Singapore Strait. Empirical algorithms for aCDOM(412), DOC, S275-295, Kd(490), total non-water absorption and euphotic depth were developed. These models produced good validation metrics and were applied to remote sensing reflectance values from the Moderate resolution Imaging Spectroradiometer MODIS ocean colour product for data within the years 2003-2019. We did not notice an increasing trend in CDOM concentrations within the years 2003-2019. Strong variation in CDOM concentrations were observed seasonally. This study suggests spatial and temporal variations in CDOM are largely due to hydrodynamic forcings influenced by the Asian monsoon, such as the reversal of current direction during the Southwest monsoon which leads to the influx of large quantities of terrigenous CDOM from the Malacca Strait during the Southwest monsoon. Strong spatial and temporal variations in S275-295 were observed. Kd(490) and euphotic depth correlated strongly with both CDOM absorption and the contribution of CDOM to non-water absorption in the western portions of the Singapore Strait
URI: https://hdl.handle.net/10356/148436
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:ASE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
2021_ES4002_Ecology_Marcus_Lim.pdf
  Restricted Access
3.33 MBAdobe PDFView/Open

Page view(s)

81
Updated on Oct 25, 2021

Download(s)

6
Updated on Oct 25, 2021

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.