Publications

Yang, L; Yu, DF; Yao, HP; Gao, H; Zhou, Y; Gai, YY; Liu, XY; Zhou, MS; Pan, SQ (2022). Capturing Secchi disk depth by using Sentinel-2 MSI imagery in Jiaozhou Bay, China from 2017 to 2021. MARINE POLLUTION BULLETIN, 185, 114304.

Abstract
Water clarity is a key parameter for assessing changes of aquatic environment. Coastal waters are complex and variable, remote sensing of water clarity for it is often limited by low spatial resolution. The Sentinel-2 Multi -Spectral Instrument (MSI) imagery with a resolution of up to 10 m are employed to solve the problem from 2017 to 2021. Distribution and characteristics of Secchi disk depth (SDD) in Jiaozhou Bay (JZB) are analyzed. Subtle changes in localized small areas are discovered, and main factors affecting the changes are explored. Among natural factors, precipitation and wind play dominant roles in variation in SDD. Human activities have a sig-nificant influence on transparency, among which fishery farming has the greatest impact. This is clearly evi-denced by the significant improvement of SDD in JZB due to the sharp decrease in human activities caused by coronavirus disease 2019 (COVID-19).

DOI:
10.1016/j.marpolbul.2022.114304

ISSN:
1879-3363