Exploring the potential of Rayleigh-corrected reflectance in coastal and inland water applications: A simple aerosol correction method and its merits

Feng, Lian1,3,5; Hou, Xuejiao4; Li, Junsheng2; Zheng, Yi1,3,5

2018-12

10.1016/j.isprsjprs.2018.08.020

ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING   影响因子和分区

0924-2716

1872-8235

Atmospheric correction methods that are designed for either ocean color or land applications often result in low quality or even no surface reflectance data for coastal and inland waters. In contrast, Rayleigh-corrected reflectance (R-rc) has been used in water applications, although without removing aerosol scattering. However, a systematic effort has not been made to investigate the uncertainties and applicability of R-rc in ocean color studies. This knowledge gap was filled in this study by using Moderate Resolution Imaging Spectroradiometer (MODIS) data covering a large area (almost the entire middle and lower reaches of the Yangtze River Basin and the Yangtze River Estuary) between 2002 and 2016. We first examined the correlation between a quality-controlled reflectance product that was generated using a shortwave-infrared (SWIR)-based atmospheric correction method (Rrs-swir) and R-rc. Improved relationships between these two products were found for all MODIS bands if a subtraction of the Rayleigh-corrected reflectance at 1240-nm was utilized as the aerosol correction for R-rc (Rrc- (1240)). The robust correlations between the two products allow for Rrs-swir to be replaced with Rrc-1240-converted reflectance (denoted as Rrs-rrc-1240) in water applications. In situ validations further demonstrated that the accuracy levels between usable Rrs-rrc-1240 and Rrs-swir data are comparable for most MODIS wavelengths. The most striking superiority of Rrs-frc-1240 over Rrs-swir is the pronounced increase in data coverage (especially for small water bodies), where the percentages of usable observations (PUOs) of the former are several times to more than one order of magnitude higher than those of the latter. The differences in PUOs were mostly due to perturbations related to land adjacency effects (LAEs) in the SWIR-based atmospheric correction. Such effects could also explain the reduced PUOs for smaller water bodies. Ocean color applications in the examined regions could benefit from such a dramatic increase in PUOs, which could enhance the capability of tracking short- to long-term dynamics and could create new possibilities for inland water system monitoring at the basin scale.

MODIS Surface reflectance R-rc Atmospheric correction Ocean color Shortwave infrared

SCI ; EI

英语

第一

Southern University of Science and Technology[G01296001]

Physical Geography ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology

Geography, Physical ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology

WOS:000453499400005

ELSEVIER SCIENCE BV

20183705808068

Aerosols ; Color ; Electromagnetic wave attenuation ; Infrared radiation ; Oceanography ; Radiometers ; Satellite imagery

Oceanography, General:471.1 ; Satellites:655.2 ; Electromagnetic Waves:711 ; Light/Optics:741.1 ; Radiation Measuring Instruments:944.7

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China
4.Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei, Peoples R China
5.Shenzhen Municipal Engn Lab Environm IoT Technol, Shenzhen 518055, Peoples R China

Feng, Lian,Hou, Xuejiao,Li, Junsheng,et al. Exploring the potential of Rayleigh-corrected reflectance in coastal and inland water applications: A simple aerosol correction method and its merits[J]. ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,2018,146:52-64.

Feng, Lian,Hou, Xuejiao,Li, Junsheng,&Zheng, Yi.(2018).Exploring the potential of Rayleigh-corrected reflectance in coastal and inland water applications: A simple aerosol correction method and its merits.ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,146,52-64.

Feng, Lian,et al."Exploring the potential of Rayleigh-corrected reflectance in coastal and inland water applications: A simple aerosol correction method and its merits".ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING 146(2018):52-64.