Predicting the diurnal blue-sky albedo of soils using their laboratory reflectance spectra and roughness indices

Cierniewski, Jerzy; Ceglarek, Jakub; Karnieli, Arnon; Królewicz, Sławomir; Kaźmierowski, Cezary; Zagajewski, Bogdan

doi:10.1016/j.jqsrt.2017.05.033

Cited by 18 publications

(13 citation statements)

References 9 publications

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“…The state of cell structures, photosynthetically active pigments, water, lignin and cellulose content determines the spectral reflectance curve in different parts of the electromagnetic spectrum [7]. In addition, the relationship between absorbed and scattered photons allows an exploration of the stress resistance mechanism(s) according to species properties [8][9][10]. main source of information, ASD FieldSpec 3/4 hyperspectral measurements were used to analyze interactions between the electromagnetic spectrum and the morphology and physiology of plants.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Tourist Traffic on the Condition and Cell Structures of Alpine Swards

Kycko

Zagajewski

Lavender³

et al. 2018

Remote Sensing

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This research focuses on the effect of trampling on vegetation in high-mountain ecosystems through the electromagnetic spectrum's interaction with plant pigments, cell structure, water content and other substances that have a direct impact on leaf properties. The aim of the study was to confirm with the use of fluorescence methods of variability in the state of high-mountain vegetation previously measured spectrometrically. The most heavily visited part of the High Tatras in Poland was divided into polygons and, after selecting the dominant species within alpine swards, a detailed analysis of trampled and reference patterns was performed. The Analytical Spectral Devices (ASD) FieldSpec 3/4 were used to acquire high-resolution spectral properties of plants, their fluorescence and the leaf chlorophyll content with the difference between the plant surface temperature (ts), and the air temperature (ta) as well as fraction of Absorbed Photosynthetically Active Radiation (fAPAR) used as reference data. The results show that, along tourist trails, vegetation adapts to trampling with the impact depending on the species. A lower chlorophyll value was confirmed by a decrease in fluorescence, and the cellular structures were degraded in trampled compared to reference species, with a lower leaf reflectance. In addition, at the extreme, trampling can eliminate certain species such as Luzula alpino-pilosa, for which significant changes were noted due to trampling.

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Section: Introductionmentioning

confidence: 99%

The Impact of Tourist Traffic on the Condition and Cell Structures of Alpine Swards

Kycko

Zagajewski

Lavender³

et al. 2018

Remote Sensing

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“…Quantitative studies of vegetation are related to plant indices [24]; they require calibration with biophysical variables [25]. Currently, they are used to assess crops, e.g., soil property modeling [26,27], irrigation efficiency [28], adaptation to stress factors [29], and the identification of dominant types of meadows [30] or forests [31,32]. Narrowband indices acquired from spectrometric measurements are applicable for assessing vegetation vigor, e.g., chlorophyll concentration or change in pigment concentration during the growing season [33].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of hyperspectral vegetation indices for the detection of chlorophyll concentration in three high Arctic plants: Salix polaris, Bistorta vivipara, and Dryas octopetala

et al. 2018

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Remote sensing, which is based on a reflected electromagnetic spectrum, offers a wide range of research methods. It allows for the identification of plant properties, e.g., chlorophyll, but a registered signal not only comes from green parts but also from dry shoots, soil, and other objects located next to the plants. It is, thus, important to identify the most applicable remote-acquired indices for chlorophyll detection in polar regions, which play a primary role in global monitoring systems but consist of areas with high and low accessibility. This study focuses on an analysis of in situ-acquired hyperspectral properties, which was verified by simultaneously measuring the chlorophyll concentration in three representative arctic plant species, i.e., the prostrate deciduous shrub Salix polaris, the herb Bistorta vivipara, and the prostrate semievergreen shrub Dryas octopetala. This study was conducted at the high Arctic archipelago of Svalbard, Norway. Of the 23 analyzed candidate vegetation and chlorophyll indices, the following showed the best statistical correlations with the optical measurements of chlorophyll concentration: Vogelmann red edge index 1, 2, 3 (VOG 1, 2, 3), Zarco-Tejada and Miller index (ZMI), modified normalized difference vegetation index 705 (mNDVI 705), modified normalized difference index (mND), red edge normalized difference vegetation index (NDVI 705), and Gitelson and Merzlyak index 2 (GM 2). An assessment of the results from this analysis indicates that S. polaris and B. vivipara were in good health, while the health status of D. octopetala was reduced. This is consistent with other studies from the same area. There were also differences between study sites, probably as a result of local variation in environmental conditions. All these indices may be extracted from future satellite missions like EnMAP (Environmental Mapping and Analysis Program) and FLEX (Fluorescence Explorer), thus, enabling the efficient monitoring of vegetation condition in vast and inaccessible polar areas.

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“…The surface roughness is a parameter that can reflect the geometric structure of the underlying surface. High surface roughness increases the reflections of solar radiation, resulting in a decrease in surface albedo [42,43]. The roughness of semi-fixed and fixed dunes is higher than that of shifting and semishifting dunes.…”

Section: Spatial and Temporal Differences In Surface Albedo Over Different Underlying Surfacesmentioning

confidence: 99%

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

He¹,

Yang²,

Xu³

et al. 2021

Pol. J. Environ. Stud.

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IntroductionSurface albedo is an important parameter to simulate land and climate processes [1,2]. Small changes in surface albedo can influence the regional energy balance and water-heat exchange, and can also affect climate change, especially in arid and semi-arid areas. When the surface albedo increases, the net radiation and convergence movement decreases. An increase in surface albedo leads to less cloud and rain and can lead to persistent drought and expansion of desertification in arid and semi-arid areas, which poses a risk to

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Predicting the diurnal blue-sky albedo of soils using their laboratory reflectance spectra and roughness indices

Cited by 18 publications

References 9 publications

The Impact of Tourist Traffic on the Condition and Cell Structures of Alpine Swards

The Impact of Tourist Traffic on the Condition and Cell Structures of Alpine Swards

Feasibility of hyperspectral vegetation indices for the detection of chlorophyll concentration in three high Arctic plants: Salix polaris, Bistorta vivipara, and Dryas octopetala

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

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