Novel mixed method for estimating particle size of seawater suspended particulate matter by means of satellite data

A technology of suspended particulate matter and satellite data, applied in particle and sedimentation analysis, measuring devices, particle size analysis, etc., can solve problems such as model uncertainty deviation, and achieve the effect of improving acquisition ability

Inactive Publication Date: 2017-02-22
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, due to the complex and changeable environment of my country's coastal waters, especially in areas with high turbidity near the coast, such as the Subei Shoal of the Yellow East Sea, existing models will have uncertainty deviations

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  • Novel mixed method for estimating particle size of seawater suspended particulate matter by means of satellite data
  • Novel mixed method for estimating particle size of seawater suspended particulate matter by means of satellite data
  • Novel mixed method for estimating particle size of seawater suspended particulate matter by means of satellite data

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0029] The invention provides a new hybrid method for estimating the particle size of suspended particulate matter in seawater by using satellite data, such as figure 1 shown, including the following steps:

[0030] 1) Obtain the seawater measured data of the seawater area to be estimated through instruments and equipment, the seawater measured data includes the optical characteristics of the water body and water quality parameters; wherein, the instruments and equipment include temperature and salinity depth meters, sun photometers, and on-site lasers installed on offshore platforms. Particle size analyzer, water body absorption attenuation measuring instrument and backscattering measuring instrument; seawater measured data include water body temperature, salinity and depth, remote sensing reflectance away from water, particle size, water body absorption co...

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Abstract

The invention discloses a novel mixed method for estimating the particle size of seawater suspended particulate matter by means of satellite data. The method comprises the steps that seawater measured data of a seawater area to be estimated is acquired; satellite data is collected, and remote sensing reflectance data is extracted and calculated; the remote sensing reflectance of a seawater subsurface layer is calculated, and a backscattering coefficient of the suspended particulate matter is calculated by combining a total backscattering coefficient of the suspended particulate matter with a relation expression between a total absorption coefficient and the remote sensing reflectance of the seawater subsurface layer; a relation expression between the particle size of the seawater suspended particulate matter and the backscattering coefficient is derived, and a relation model between the backscattering coefficient of the seawater suspended particulate matter and the particle size of the seawater suspended particulate matter is established; an association relation process between the particle size of the seawater suspended particulate matter and the remote sensing reflectance of the seawater subsurface layer is established, and satellite-retrieved particle size distribution information of the seawater suspended particulate matter is obtained by means of monthly-composited remote sensing reflectance data. The remote sensing estimation capacity on offshore high-turbidity water body PSD distribution information can be improved.

Description

technical field [0001] The invention relates to a method for estimating the particle size of suspended particles, in particular to a new hybrid method for estimating the particle size of seawater suspended particles by using satellite data, and belongs to the technical field of ocean water color remote sensing. Background technique [0002] Ocean water color remote sensing plays an important role in satellite ocean remote sensing technology, and has become an important means of water body research. It can obtain the concentration information of water body components synchronously on a large scale, such as chlorophyll, suspended particulate matter, yellow substances, etc. Water color remote sensing is widely used in the estimation of marine primary productivity, monitoring of marine ecological environment, ocean dynamics, marine fishery development and management services. [0003] Particle size distribution (PSD) is a parameter used to describe the essential characteristics...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/02
Inventor 孙德勇丘仲锋王胜强环宇何宜军
Owner NANJING UNIV OF INFORMATION SCI & TECH
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