MODIS‐derived ocean color products along the China east coastal region

Abstract

[1] Ocean water-leaving radiance spectra extending from the visible (blue) to the near-infrared (NIR) derived from Moderate Resolution Imaging Spectroradiometer (MODIS) measurements are reported here for the China east coastal region. The China east coastal region contains some of the most consistently highly turbid coastal waters to be found anywhere. For turbid waters, standard MODIS data processing often produces significant errors in the derived ocean color products due to significant ocean water-leaving radiance contributions at the two NIR bands. In this paper, we demonstrate an atmospheric correction approach using MODIS short wave infrared (SWIR) bands for deriving more accurate ocean color products in coastal regions. The ocean is generally still black at the SWIR bands even for very turbid waters due to much stronger water absorption at the SWIR wavelengths. The approach has been tested for and applied to various coastal regions (e.g., the U.S. and China east coastal regions) using MODIS data. In situ data collected along the China east coastal region have been used to validate performance of the algorithm. Using MODIS Aqua measurements from July of 2002 to December of 2005, seasonal variations in the visible and the NIR ocean water-leaving radiances for the Hangzhou Bay in the China east coastal region are derived and analyzed. Very significant ocean NIR contributions along various locations in the China east coastal region (e.g., Hangzhou Bay) are observed.

Illuminating the Capabilities of the Suomi National Polar-Orbiting Partnership (NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band

“…These parameters and their relation to marine resources are important factors economically for littoral nations. Rivers deposit large amounts of sediments into the ocean, forming highly turbid regions which pose challenges to ocean color retrievals owing to significant contributions from the normally "dark water" near-infrared bands used for atmospheric correction (e.g., [38][39][40]). Currently, no observing systems are capable of producing ocean color products at night (including VIIRS).…”

Potential of High Spatial and Temporal Ocean Color Satellite Data to Study the Dynamics of Suspended Particles in a Micro-Tidal River Plume

“…Rrs(555), Rrs(645) and Rrs(859) Level 2 products were generated using the l2gen function. Four atmospheric corrections were tested to determine the most suitable for the moderately turbid waters of the Rhône River plume: (1) the MUMM [37]; (2) the NIR [38]; (3) the SWIR [39,40] and (4) the NIR-SWIR [36] atmospheric correction algorithms. The MUMM atmospheric correction algorithm is based on the spatial homogeneity of the water-leaving radiances and aerosols ratios (α and ε respectively, see Table 1) between two NIR bands (748 and 869 nm for MODIS sensors) [37].…”

Satellite‐Observed Algae Blooms in China's Lake Taihu

“…MODIS-Aqua data for Lake Taihu in the spring of 2007 were acquired and processed to produce aquatic optical and biological products using a recently developed shortwave infrared (SWIR) atmospheric correction algorithm [Wang, 2007;Wang et al, 2007]. In particular, MODIS high spatial resolution data (0.25 and 0.5 kilometers), in addition to MODIS 1-kilometer spatial resolution data, were used for this study.…”