Aerosol-induced changes in sky polarization pattern: potential hint on applications in polarimetric remote sensing

Chen, Wei; Bai, Song; Wang, Dexuan; Zhao, Hongwei; Sun, Hao; Yi, Lina; Zhao, Hu; Xie, Donghui; Peltoniemi, Jouni; Li, Zhanqing

doi:10.1080/01431161.2019.1685724

Cited by 21 publications

(8 citation statements)

References 62 publications

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“…Though the DoP can be measured by remote sensing sensors or polarimetric photography (Chen et al., 2020), it is difficult to obtain real‐time DoP data in compliance with our monitoring. The DR at 532 nm of Beijing (39.977°N, 116.381°E) measured by Mie‐scattering lidar was adopted to examine the effects of ambient aerosols on light polarization patterns.…”

Section: Methodsmentioning

confidence: 99%

Foraging trip duration of honeybee increases during a poor air quality episode and the increase persists thereafter

Cho

Jeong

Lee

et al. 2021

Ecology and Evolution

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Increased concentration of airborne particulate matter (PM) in the atmosphere alters the degree of polarization of skylight which is used by honeybees for navigation during their foraging trips. However, little has empirically shown whether poor air quality indeed affects foraging performance (foraging trip duration) of honeybee. Here, we show apparent increases in the average duration of honeybee foraging during and after a heavy air pollution event compared with that of the pre‐event period. The average foraging duration of honeybees during the event increased by 32 min compared with the pre‐event conditions, indicating that 71% more time was spent on foraging. Moreover, the average foraging duration measured after the event did not recover to its pre‐event level. We further investigated whether an optical property (Depolarization Ratio, DR) of dominant PM in the atmosphere and level of air pollution (fine PM mass concentration) affect foraging trip duration. The result demonstrates the DR and fine PM mass concentration have significant effects on honeybee foraging trip duration. Foraging trip duration increases with decreasing DR while it increases with increasing fine PM mass concentration. In addition, the effects of fine PM mass concentration are synergistic with overcast skies. Our study implies that poor air quality could pose a new threat to bee foraging.

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Section: Methodsmentioning

confidence: 99%

Foraging trip duration of honeybee increases during a poor air quality episode and the increase persists thereafter

Cho

Jeong

Lee

et al. 2021

Ecology and Evolution

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“…Cheng et al (2020) provide examples of real measurements of the underwater polarization signal and explain how the data could be used as a tool to develop underwater bionic polarization navigation technology, a new solution for underwater navigation. Chen et al (2020) show that different aerosols in atmosphere produce different polarization patterns. Previous studies utilizing sky polarization patterns generally consider only aerosol optical depth.…”

Section: Water Polarization Characteristicsmentioning

confidence: 99%

“…Previous studies utilizing sky polarization patterns generally consider only aerosol optical depth. By considering scattering and absorbing properties of coarse mode and fine mode aerosols, Chen et al (2020) find that the scattering mode aerosols tend to decrease sky polarization, while absorbing aerosols tend to increase sky polarization. This finding is important for applications such as polarization navigation, which rely on the accuracy of sky polarization pattern calculations.…”

Section: Water Polarization Characteristicsmentioning

confidence: 99%

Optical polarization remote sensing

Chen

Yan

Chandrasekar

2020

International Journal of Remote Sensing

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“…On top of that, as a boundary condition, polarized characteristics of land surfaces are essential for retrieval of atmospheric properties, e.g. aerosol microphysical properties and the optical depth [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Degree of Linear Polarization of Land Surfaces: Analyses Using POLDER/PARASOL Measurements

2020

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Polarized reflectance (Rp) and degree of linear polarization (DOLP) provide essential information about polarized characteristics of land surfaces. For a given target, DOLP determines the magnitude of Rp. It has been proved that DOLP can be used for some remote monitoring cases that cannot be well detected with either non-polarized or polarized reflectance. Several bidirectional polarization distribution function (BPDF) models have been proposed in the last several decades to reproduce the angular distribution of Rp, but much less attention has been devoted to modeling and analyzing of DOLP. In this study, the Nadal-Bré on BPDF model was transferred for calculating the DOLP of earth targets, and characteristics of DOLP were analyzed based on the modeling results. To evaluate the model's feasibility, two experiments were executed: a fitting and a a priori modeling. The results showed good correlations (r>0.9) between estimated and measured DOLP when the model was fitted with POLDER/PARASOL (a space-borne multiangle multi-spectral polarimetric sensor) measurements. An increase of accuracy from 490 nm to 865 nm for fitting modeling was achieved and the highest accuracy was found at 865 nm for both experiments, with overall relative root mean square errors of 1.1 and 1.3 for fitting and a priori modeling, respectively. Classbased free parameters can be used for the a priori model of DOLP. The dispersion of the target-based free parameters controls the correlation of the a priori modeling results. Moreover, the maximum DOLP was found to be strongly determined by the corresponding bidirectional reflectance factor for every surface type (R 2 =0.86). This study provides an additional approach for obtaining DOLP from remote sensing platform and is helpful for studies of typical land surfaces.

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Aerosol-induced changes in sky polarization pattern: potential hint on applications in polarimetric remote sensing

Cited by 21 publications

References 62 publications

Foraging trip duration of honeybee increases during a poor air quality episode and the increase persists thereafter

Foraging trip duration of honeybee increases during a poor air quality episode and the increase persists thereafter

Optical polarization remote sensing

Degree of Linear Polarization of Land Surfaces: Analyses Using POLDER/PARASOL Measurements

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