Solar Blue Light Radiation Enhancement during Mid to Low Solar Elevation Periods under Cloud Affected Skies

Parisi, Alfio V.; Igoe, Damien P.; Amar, Abdurazaq; Downs, Nathan

doi:10.3390/s20154105

Cited by 4 publications

(3 citation statements)

References 51 publications

(129 reference statements)

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“…It is important since as the solar zenith angle increases, the amount of blue light in the sunlight decreases relative to red light resulting in reddish sunsets and sunrises. In addition to that, the useful irradiance available at the surface is affected by many atmospheric factors such as aerosol and by the quantity and types of clouds [ 43 , 44 ]. The breakthrough happened in 2021, when several papers describing the possible role of B in Arabidopsis cold acclimation were published [ 45 , 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase

Ahres

Pálmai

Kovács

et al. 2022

Plants

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It is well established that cold acclimation processes are highly influenced, apart from cold ambient temperatures, by light-dependent environmental factors. In this study we investigated whether an extra blue (B) light supplementation would be able to further improve the well-documented freezing tolerance enhancing effect of far-red (FR) enriched white (W) light. The impact of B and FR light supplementation to white light (WFRB) on hormone levels and lipid contents were determined in winter barley at moderate (15 °C) and low (5 °C) temperatures. Low R:FR ratio effectively induced frost tolerance in barley plantlets, but additional B light further enhanced frost hardiness at both temperatures. Supplementation of WFR (white light enriched with FR light) with B had a strong positive effect on abscisic acid accumulation while the suppression of salicylic acid and jasmonic acid levels were observed at low temperature which resembles the shade avoidance syndrome. We also observed clear lipidomic differences between the individual light and temperature treatments. WFRB light changed the total lipid content negatively, but monogalactosyldiacylglycerol (MGDG) content was increased, nonetheless. Our results prove that WFRB light can greatly influence phytohormone dynamics and lipid contents, which eventually leads to more efficient pre-hardening to avoid frost damage.

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Section: Introductionmentioning

confidence: 99%

The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase

Ahres

Pálmai

Kovács

et al. 2022

Plants

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“…Even though the solar spectrum varies across latitudes due to the curvature of the Earth, clouds were found to have a greater influence on the solar spectrum than latitude. Clouds blocking the sun causes a higher proportion of blue in visible light [21,22], meanwhile the long-wavelength red light was recently found can slow the progression of myopia in children [23,24]. Moreover, sunshine duration refers to sunny hours during the daytime.…”

Section: Introductionmentioning

confidence: 99%

Detection of adaptation to light environment in myopia-associated loci Diversity of the myopia genetic background

Xia

Nakayama

2022

Preprint

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The time spent outdoors and exposure to bright sunlight have been reported to play important roles in preventing myopia progression. Myopia prevalence is generally low in Europe, and we hypothesized that local adaptation of ancestors in insufficient sunlight regions might underlie this low prevalence in Europeans. To verify this conjecture and understand how ancestry adaptation influenced on the diversity of myopia genetic background, polygenic risk scores (PRS) was calculated and revealed that the genetic risk of myopia increased as latitude decreased in the 1000 genome projects (1KGP) EUR, and we further determined selection signatures near the rhodopsin (RHO) coding region in 1KGP Finnish. The derived allele frequencies of identified loci correlated with sunshine duration worldwide, and the allele age was estimated to be ~20,000 years, coincidently after the divergence of Europeans and East Asians. TSPAN10 (rs9747347) is significantly associated with both myopia and pigmentation in Europeans, and we found selection favored the myopia risk allele in EUR. Haplotype comparison highlighted the divergence between EAS and EUR in RHO and pigmentation-associated loci, and the frequency diversity in Admixed American (AMR) of these loci was found to originate from recent admixture and local adaptation. We concluded that local adaptation played a role in myopia prevalence deviation, and selective pressure in the myopia-associated loci may originate from adaptation to sunlight environments rather than myopia itself. These findings reveal traces of evolution history of myopia's genetic background, providing a new aspect of understanding the patterns and diversity of myopia prevalence.

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“…However, while humans can benefit from exposure to solar radiation in the outdoor environment, there are recognized harmful effects that arise when exposure is excessive. This includes exposure to solar short wavelength UVR but also the potential blue light hazard (9,10). Short wavelength blue light represents the "blue" visible range in the optical solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

Electronic Sun Journal Versus Self‐report Sun Diary: A Comparison of Recording Personal Sunlight Exposure Methods

Dexter

King

Parisi

et al. 2020

Photochem & Photobiology

Self Cite

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This research compared personal sunlight exposure times monitored electronically within suburban Australian environments against self-report paper journals for determining the timing and total duration of individual exposure to daily solar radiation. A total of 90 Electronic Sun Journal (ESJ) daily readings and self-report timing and duration estimates of exposure for weekend and weekdays were compared. A Wilcoxon ranked sign test showed a significant difference (V = 157, P < 0.001) between the duration of exposure recorded electronically and the duration of exposure that was self-reported in a diary. There was also found to be a statistically significant difference between total exposure time measured using both methods for weekends (V = 10, P < 0.001) and weekdays (V = 87, P < 0.001). General trends in outdoor exposure timing confirmed that the most frequent daily exposures received over the weekend occurred between 1 and 2 h earlier than the most frequent exposures received on weekdays. This preliminary research found that exposure durations as recorded by the ESJ were longer on the weekends compared to weekdays (W = 402, P < 0.001) and confirmed that the ESJ is a viable alternative to self-reporting diaries.

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Solar Blue Light Radiation Enhancement during Mid to Low Solar Elevation Periods under Cloud Affected Skies

Cited by 4 publications

References 51 publications

The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase

The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase

Detection of adaptation to light environment in myopia-associated loci Diversity of the myopia genetic background

Electronic Sun Journal Versus Self‐report Sun Diary: A Comparison of Recording Personal Sunlight Exposure Methods

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