Determination of the UV solar risk in Argentina with high-resolution maps calculated using TOMS ozone climatology

Piacentini, R. D.; Cede, Alexander; Luccini, Eduardo; Stengel, Fernando

doi:10.1016/j.asr.2003.06.031

Cited by 6 publications

(4 citation statements)

References 8 publications

(5 reference statements)

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“…Of particular importance is the high solar irradiance in the HAAL (1,2) with values of UV-B flux at mid-day up to 10 W m À2 and a monthly average of daily insolation of 6.6 kWhm À2 d À1 ; these parameters are among the highest in the world (3) (NASAOMI/ Aura Online serverhttp://gdata1.sci.gsfc.nasa.gov). The radiation values on HAALs are 165% higher than the reported values for lakes at sea level (1,2,(4)(5)(6)(7)(8)(9), and the erythemal index 1 extends above to 15, which is equivalent to 5.57 MED 2 h À1 and to ca. 1200 J m À2 h À1 .…”

Section: Introductionmentioning

confidence: 63%

Photolyases and Cryptochromes in UV‐resistant Bacteria from High‐altitude Andean Lakes

Portero

Alonso-Reyes

Zannier

et al. 2019

Photochem & Photobiology

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“High‐altitude Andean Lakes” (HAAL) are pristine environments harboring poly‐extremophilic microbes that show combined adaptations to physical and chemical stress such as large daily ambient thermal amplitude, extreme solar radiation levels, intense dryness, alkalinity, high concentrations of arsenic (up to 200 ppm) and dissolved salts. In this work, we compared the UV resistance profiles, pigment content and photoreactivation abilities of three UV‐resistant bacteria isolated from distinct niches from HAALs, that is Acinetobacter sp. Ver3 (water, Lake Verde; 4400 m), Exiguobacterium sp. S17 (stromatolite, Lake Socompa, 3570 m) and Nesterenkonia sp. Act20 (soil, Lake Socompa, 3570 m). UV resistance ability of HAAL's strains indicate a clear adaptation to high radiation exposure encountered in their original habitat, which can be explained by genetic and physiological mechanisms named as the UV‐resistome. Thus, the UV‐resistome depends on the expression of a diverse set of genes devoted to evading or repairing the damage it provoked direct or indirectly. As pigment extraction and photoreactive assays indicate the presence of photoactive molecules, we characterized more in detail proteins with homology to photolyases/cryptochromes members (CPF). Phylogenetic analyses, sequence comparison and 3D modeling with bona fide CPF members were used to prove the presence of functional domains and key residues in the novel proteins.

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Section: Introductionmentioning

confidence: 63%

Photolyases and Cryptochromes in UV‐resistant Bacteria from High‐altitude Andean Lakes

Portero

Alonso-Reyes

Zannier

et al. 2019

Photochem & Photobiology

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“…As the ozone column is naturally thinner over the tropics, and UV intensity increases with the altitude, the Puna-High Andes region is consequently exposed to an exceptionally high solar irradiation including harmful UV levels; there are numerous individual reports of climatologists (57)(58)(59)(60) and biologists exploring the Puna-High Andes region reporting astonishing solar levels in different sampling points or climatological stations for ground measurements (7,8,41,61,62). Solar erythemal UV radiation incident on a range of tropical to high latitude regions from Argentina was ground measured by Piacentini et al (60): in Marambio Base, Antartica (64.23°S, 56.78°W, 300 m) the UV Ery (in kJ m À2 ) was 0 and 2.3 in July and January, respectively, whereas in Buenos Aires (34.61°S, 58.41°W, 25 m) it was estimated as ranging between 0.8 (July) and 6.2 (January).…”

Section: High-altitude Andean Lakes: Empire Of the Sunmentioning

confidence: 99%

“…Hence, biologically damaging UV data were traditionally considered as the integral between 280 and 315 nm (UVB 280–315 nm ) or in terms of the integral between 280 and 320 nm (UVB 280–320 nm ). For a better assessment of sunburn risk to solar exposure, UV irradiation is now reported using the ‘sunburning’, or erythemally weighted radiation (UV Ery ) or also the UV index (UVI), which is 40 times the UV Ery . UV Index is categorized by the World Health Organization as low when is below 2 and extreme when is higher than 11 (http://www.who.int/uv/publications/en/GlobalUVI.pdf).…”

Section: High‐altitude Andean Lakes: Empire Of the Sunmentioning

confidence: 99%

Forged Under the Sun: Life and Art of Extremophiles from Andean Lakes

Albarracín

Gärtner

Farı́as

2015

Photochem & Photobiology

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High-altitude Andean lakes (HAAL) are a treasure chest for microbiological research in South America. Their indigenous microbial communities are exposed to extremely high UV irradiation and to multiple chemical extremes (Arsenic, high salt content, alkalinity). Microbes are found both, free-living or associated into microbial mats with different degrees of mineralization and lithification, including unique modern stromatolites located at 3570 m above sea level. Characterization of these polyextremophilic microbes began only recently, employing morphological and phylogenetic methods as well as high-throughput sequencing and proteomics approach. Aside from providing a general overview on microbial communities, special attention is given to various survival strategies; HAAL's microbes present a complex system of shared genetic and physiological mechanisms (UV-resistome) based on UV photoreceptors and stress sensors with their corresponding response regulators, UV avoidance and protection strategies, damage tolerance and UV damage repair. Molecular information will be provided for what is, so far the most studied HAAL molecule, a CPD-Class I photolyase from Acinetobacter Ver3 (Laguna Verde, 4400 m). This work further proposes some strategies that make an appeal for the preservation of HAAL, a highly fragile environment that offers promising and ample research possibilities.

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“…Seven papers used remotely sensed stratospheric ozone column data (U.S. National Aeronautics and Space Administration, Total Ozone Mapping Spectrometer) for predicting tropospheric levels of ultraviolet radiation, typically in studies of skin cancer, but also as an indication of vitamin D levels in studies of other cancers (Slaper et al, 1998; Piacentini et al, 2004; Solomon et al, 2004; Garland et al, 2006; Mohr et al, 2006, 2007; Tatalovich et al, 2006). The remaining five papers used land surface remotely sensed data for environmental exposure assessment in cancer research (Table 1).…”

Section: Literature Reviewmentioning

confidence: 99%

Use of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research

Maxwell

Meliker

Goovaerts

2009

J Expo Sci Environ Epidemiol

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In recent years, geographic information systems (GIS) have increasingly been used for reconstructing individual-level exposures to environmental contaminants in epidemiological research. Remotely sensed data can be useful in creating space-time models of environmental measures. The primary advantage of using remotely sensed data is that it allows for study at the local scale (e.g., residential level) without requiring expensive, time-consuming monitoring campaigns. The purpose of our study was to identify how land surface remotely sensed data are currently being used to study the relationship between cancer and environmental contaminants, focusing primarily on agricultural chemical exposure assessment applications. We present the results of a comprehensive literature review of epidemiological research where remotely sensed imagery or land cover maps derived from remotely sensed imagery were applied. We also discuss the strengths and limitations of the most commonly used imagery data (aerial photographs and Landsat satellite imagery) and land cover maps.

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Determination of the UV solar risk in Argentina with high-resolution maps calculated using TOMS ozone climatology

Cited by 6 publications

References 8 publications

Photolyases and Cryptochromes in UV‐resistant Bacteria from High‐altitude Andean Lakes

Photolyases and Cryptochromes in UV‐resistant Bacteria from High‐altitude Andean Lakes

Forged Under the Sun: Life and Art of Extremophiles from Andean Lakes

Use of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research

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