Optical Interpretation of Oil Emulsions in the Ocean – Part I: Laboratory Measurements and Proof-of-concept with AVIRIS Observations

Yingcheng Lu; Jing Shi; Yansha Wen; Chuanmin Hu; Yang Zhou; Shaojie Sun; Minwei Zhang; Zhihua Mao; Yongxue Liu

doi:10.1016/j.rse.2019.05.002

Optical Interpretation of Oil Emulsions in the Ocean – Part I: Laboratory Measurements and Proof-of-concept with AVIRIS Observations

Yingcheng Lu, Jing Shi, Yansha Wen, Chuanmin Hu, Yang Zhou, Shaojie Sun, Minwei Zhang, Zhihua Mao, Yongxue Liu

College of Marine Science

Research output: Contribution to journal › Article › peer-review

Abstract

Optical identification and quantification of various marine-spilled oils play an important role in oil spill monitoring, assessment, and response. Through weathering processes, oil may become emulsified in two forms of oil-water mixture: water in oil (WO) and oil in water (OW). These two forms of oil emulsion are significantly different in their volume concentration (oil/water ratio), physical properties (viscosity, density, thickness), and <a title="Learn more about optical properties from ScienceDirect's AI-generated Topic Pages"> optical properties </a> (spectral reflectance ( R u (λ), sr −1 ), and <a title="Learn more about spectral absorption from ScienceDirect's AI-generated Topic Pages"> spectral absorption </a> ( a (λ), m −1 )). In this study, the optical properties of both types of oil emulsion, with different volumetric concentrations, are determined from carefully prepared oil emulsion samples, with the aim of helping to interpret <a title="Learn more about optical remote sensing from ScienceDirect's AI-generated Topic Pages"> optical remote sensing </a> imagery. The concentrations of stable WO and OW emulsions range from 45% to 95% and from 0.025% to 3%, respectively. They exhibit different R u spectral shapes in the near-infrared and shortwave-infrared wavelengths, with five “-CH” molecular bonds evident in the WO emulsion spectra. R u (600–1400 nm) of OW emulsions increases with volume concentrations from 0% to 3.0%, but R u (600–2400 nm) of the WO emulsions decreases with volume concentrations from 45% to 100%. On the other hand, for a fixed concentration (80%), R u (600–2400 nm) of WO emulsions increases monotonically with thicknesses of up to ~0.4 mm, beyond which R u (600–2400 nm) no longer increases with oil thickness. The difference between the R u spectral shapes of OW and WO emulsions, as well as the statistical relationships between volume concentrations and R u (NIR-SWIR) and between oil thickness and R u (NIR-SWIR), provide the basis for developing optical models to classify oil emulsion types and for quantifying oil volume from <a title="Learn more about remote sensing from ScienceDirect's AI-generated Topic Pages"> remote sensing </a> imagery. The potential of such an application is demonstrated using hyperspectral <a title="Learn more about AVIRIS from ScienceDirect's AI-generated Topic Pages"> AVIRIS </a> imagery collected over the Deepwater Horizon (DWH) oil spill in the <a title="Learn more about Gulf of Mexico from ScienceDirect's AI-generated Topic Pages"> Gulf of Mexico </a> (GoM).

Original language	American English
Journal	Remote Sensing of Environment
Volume	230
DOIs	https://doi.org/10.1016/j.rse.2019.05.002
State	Published - Jan 1 2019

Keywords

Oil spill
Oil emulsion
Volume concentration
Oil thickness
Optical remote sensing
Reflectance
Absorption

Disciplines

Life Sciences

Access to Document

10.1016/j.rse.2019.05.002License: CC BY

https://doi.org/10.1016/j.rse.2019.05.002

Cite this

@article{68893fe70b8648aeba69cc991aad0419,

title = "Optical Interpretation of Oil Emulsions in the Ocean – Part I: Laboratory Measurements and Proof-of-concept with AVIRIS Observations",

abstract = " Optical identification and quantification of various marine-spilled oils play an important role in oil spill monitoring, assessment, and response. Through weathering processes, oil may become emulsified in two forms of oil-water mixture: water in oil (WO) and oil in water (OW). These two forms of oil emulsion are significantly different in their volume concentration (oil/water ratio), physical properties (viscosity, density, thickness), and optical properties (spectral reflectance ( R u (λ), sr −1 ), and spectral absorption ( a (λ), m −1 )). In this study, the optical properties of both types of oil emulsion, with different volumetric concentrations, are determined from carefully prepared oil emulsion samples, with the aim of helping to interpret optical remote sensing imagery. The concentrations of stable WO and OW emulsions range from 45% to 95% and from 0.025% to 3%, respectively. They exhibit different R u spectral shapes in the near-infrared and shortwave-infrared wavelengths, with five “-CH” molecular bonds evident in the WO emulsion spectra. R u (600–1400 nm) of OW emulsions increases with volume concentrations from 0% to 3.0%, but R u (600–2400 nm) of the WO emulsions decreases with volume concentrations from 45% to 100%. On the other hand, for a fixed concentration (80%), R u (600–2400 nm) of WO emulsions increases monotonically with thicknesses of up to ~0.4 mm, beyond which R u (600–2400 nm) no longer increases with oil thickness. The difference between the R u spectral shapes of OW and WO emulsions, as well as the statistical relationships between volume concentrations and R u (NIR-SWIR) and between oil thickness and R u (NIR-SWIR), provide the basis for developing optical models to classify oil emulsion types and for quantifying oil volume from remote sensing imagery. The potential of such an application is demonstrated using hyperspectral AVIRIS imagery collected over the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM). ",

keywords = "Oil spill, Oil emulsion, Volume concentration, Oil thickness, Optical remote sensing, Reflectance, Absorption",

author = "Yingcheng Lu and Jing Shi and Yansha Wen and Chuanmin Hu and Yang Zhou and Shaojie Sun and Minwei Zhang and Zhihua Mao and Yongxue Liu",

year = "2019",

month = jan,

day = "1",

doi = "10.1016/j.rse.2019.05.002",

language = "American English",

volume = "230",

journal = "Remote Sensing of Environment",

}

TY - JOUR

T1 - Optical Interpretation of Oil Emulsions in the Ocean – Part I: Laboratory Measurements and Proof-of-concept with AVIRIS Observations

AU - Lu, Yingcheng

AU - Shi, Jing

AU - Wen, Yansha

AU - Hu, Chuanmin

AU - Zhou, Yang

AU - Sun, Shaojie

AU - Zhang, Minwei

AU - Mao, Zhihua

AU - Liu, Yongxue

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Optical identification and quantification of various marine-spilled oils play an important role in oil spill monitoring, assessment, and response. Through weathering processes, oil may become emulsified in two forms of oil-water mixture: water in oil (WO) and oil in water (OW). These two forms of oil emulsion are significantly different in their volume concentration (oil/water ratio), physical properties (viscosity, density, thickness), and optical properties (spectral reflectance ( R u (λ), sr −1 ), and spectral absorption ( a (λ), m −1 )). In this study, the optical properties of both types of oil emulsion, with different volumetric concentrations, are determined from carefully prepared oil emulsion samples, with the aim of helping to interpret optical remote sensing imagery. The concentrations of stable WO and OW emulsions range from 45% to 95% and from 0.025% to 3%, respectively. They exhibit different R u spectral shapes in the near-infrared and shortwave-infrared wavelengths, with five “-CH” molecular bonds evident in the WO emulsion spectra. R u (600–1400 nm) of OW emulsions increases with volume concentrations from 0% to 3.0%, but R u (600–2400 nm) of the WO emulsions decreases with volume concentrations from 45% to 100%. On the other hand, for a fixed concentration (80%), R u (600–2400 nm) of WO emulsions increases monotonically with thicknesses of up to ~0.4 mm, beyond which R u (600–2400 nm) no longer increases with oil thickness. The difference between the R u spectral shapes of OW and WO emulsions, as well as the statistical relationships between volume concentrations and R u (NIR-SWIR) and between oil thickness and R u (NIR-SWIR), provide the basis for developing optical models to classify oil emulsion types and for quantifying oil volume from remote sensing imagery. The potential of such an application is demonstrated using hyperspectral AVIRIS imagery collected over the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM).

AB - Optical identification and quantification of various marine-spilled oils play an important role in oil spill monitoring, assessment, and response. Through weathering processes, oil may become emulsified in two forms of oil-water mixture: water in oil (WO) and oil in water (OW). These two forms of oil emulsion are significantly different in their volume concentration (oil/water ratio), physical properties (viscosity, density, thickness), and optical properties (spectral reflectance ( R u (λ), sr −1 ), and spectral absorption ( a (λ), m −1 )). In this study, the optical properties of both types of oil emulsion, with different volumetric concentrations, are determined from carefully prepared oil emulsion samples, with the aim of helping to interpret optical remote sensing imagery. The concentrations of stable WO and OW emulsions range from 45% to 95% and from 0.025% to 3%, respectively. They exhibit different R u spectral shapes in the near-infrared and shortwave-infrared wavelengths, with five “-CH” molecular bonds evident in the WO emulsion spectra. R u (600–1400 nm) of OW emulsions increases with volume concentrations from 0% to 3.0%, but R u (600–2400 nm) of the WO emulsions decreases with volume concentrations from 45% to 100%. On the other hand, for a fixed concentration (80%), R u (600–2400 nm) of WO emulsions increases monotonically with thicknesses of up to ~0.4 mm, beyond which R u (600–2400 nm) no longer increases with oil thickness. The difference between the R u spectral shapes of OW and WO emulsions, as well as the statistical relationships between volume concentrations and R u (NIR-SWIR) and between oil thickness and R u (NIR-SWIR), provide the basis for developing optical models to classify oil emulsion types and for quantifying oil volume from remote sensing imagery. The potential of such an application is demonstrated using hyperspectral AVIRIS imagery collected over the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM).

KW - Oil spill

KW - Oil emulsion

KW - Volume concentration

KW - Oil thickness

KW - Optical remote sensing

KW - Reflectance

KW - Absorption

UR - https://digitalcommons.usf.edu/msc_facpub/2050

UR - https://doi.org/10.1016/j.rse.2019.05.002

U2 - 10.1016/j.rse.2019.05.002

DO - 10.1016/j.rse.2019.05.002

M3 - Article

VL - 230

JO - Remote Sensing of Environment

JF - Remote Sensing of Environment

ER -

Optical Interpretation of Oil Emulsions in the Ocean – Part I: Laboratory Measurements and Proof-of-concept with AVIRIS Observations

Abstract

Keywords

Disciplines

Access to Document

Other files and links

Cite this