Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula
<p>This study aims to assess the dependence of spectral UV radiation on different atmospheric and terrestrial factors, including solar zenith angle, ozone, and cloud cover, in the southern polar environment. For this purpose, 23 260 spectra (300–363 nm), obtained by the B199 Mk-III Brewer spec...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-04-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/23/4617/2023/acp-23-4617-2023.pdf |
| _version_ | 1797844954576322560 |
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| author | K. Čížková K. Čížková K. Láska L. Metelka M. Staněk |
| author_facet | K. Čížková K. Čížková K. Láska L. Metelka M. Staněk |
| author_sort | K. Čížková |
| collection | DOAJ |
| description | <p>This study aims to assess the dependence of spectral UV
radiation on different atmospheric and terrestrial factors, including solar
zenith angle, ozone, and cloud cover, in the southern polar environment. For
this purpose, 23 260 spectra (300–363 nm), obtained by the B199 Mk-III
Brewer spectrophotometer at Marambio Base, Antarctic Peninsula region, over
the period 2010–2020, were studied. A neural network model was developed to
investigate the effects of the explanatory variables at 127 wavelengths in
the interval 300–363 nm, with a 0.5 nm sampling interval. Solar zenith
angle (SZA) proved to be the most important parameter, followed by cloud
cover, total ozone column (TOC), and surface albedo. The relative SZA effect
is greatest at the shortest wavelengths, where a 1<span class="inline-formula"><sup>∘</sup></span> decrease in
SZA results in a 6 %–18 % increase in UV irradiance (305 nm). TOC
particularly affects the short wavelengths below approximately 320–325 nm, when for
example at 305 nm a 10 DU decrease in TOC causes a 7 %–13 % increase in
UV irradiance. The large-scale ozone holes (e.g., in 2011–2012, 2014–2015,
2018–2019) caused the spectral UV irradiance at very short wavelengths to peak
in spring, whereas in other seasons (e.g., 2010–2011, 2012–2013), the
maxima at all wavelengths were recorded in summer (November to January).
Absorption of UV radiance by the ozone also affected the temporal distribution
of very high spectral UV irradiances (i.e., highest 10 % of the
distribution), when at 305 nm they were observed both in spring and summer
months, and at 340 nm they occurred mostly in summer. The effect of cloud
cover was strongest near the fully cloudy sky and in the summer months, when
the Antarctic clouds tend to be thickest.</p> |
| first_indexed | 2024-04-09T17:30:44Z |
| format | Article |
| id | doaj.art-bd63213c69d44194979db406d29a28cd |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-09T17:30:44Z |
| publishDate | 2023-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-bd63213c69d44194979db406d29a28cd2023-04-18T06:48:09ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242023-04-01234617463610.5194/acp-23-4617-2023Assessment of spectral UV radiation at Marambio Base, Antarctic PeninsulaK. Čížková0K. Čížková1K. Láska2L. Metelka3M. Staněk4Department of Geography, Faculty of Science, Masaryk University, Brno, 611 37, Czech RepublicSolar and Ozone Observatory, Czech Hydrometeorological Institute, Hradec Králové, 500 08, Czech RepublicDepartment of Geography, Faculty of Science, Masaryk University, Brno, 611 37, Czech RepublicSolar and Ozone Observatory, Czech Hydrometeorological Institute, Hradec Králové, 500 08, Czech RepublicSolar and Ozone Observatory, Czech Hydrometeorological Institute, Hradec Králové, 500 08, Czech Republic<p>This study aims to assess the dependence of spectral UV radiation on different atmospheric and terrestrial factors, including solar zenith angle, ozone, and cloud cover, in the southern polar environment. For this purpose, 23 260 spectra (300–363 nm), obtained by the B199 Mk-III Brewer spectrophotometer at Marambio Base, Antarctic Peninsula region, over the period 2010–2020, were studied. A neural network model was developed to investigate the effects of the explanatory variables at 127 wavelengths in the interval 300–363 nm, with a 0.5 nm sampling interval. Solar zenith angle (SZA) proved to be the most important parameter, followed by cloud cover, total ozone column (TOC), and surface albedo. The relative SZA effect is greatest at the shortest wavelengths, where a 1<span class="inline-formula"><sup>∘</sup></span> decrease in SZA results in a 6 %–18 % increase in UV irradiance (305 nm). TOC particularly affects the short wavelengths below approximately 320–325 nm, when for example at 305 nm a 10 DU decrease in TOC causes a 7 %–13 % increase in UV irradiance. The large-scale ozone holes (e.g., in 2011–2012, 2014–2015, 2018–2019) caused the spectral UV irradiance at very short wavelengths to peak in spring, whereas in other seasons (e.g., 2010–2011, 2012–2013), the maxima at all wavelengths were recorded in summer (November to January). Absorption of UV radiance by the ozone also affected the temporal distribution of very high spectral UV irradiances (i.e., highest 10 % of the distribution), when at 305 nm they were observed both in spring and summer months, and at 340 nm they occurred mostly in summer. The effect of cloud cover was strongest near the fully cloudy sky and in the summer months, when the Antarctic clouds tend to be thickest.</p>https://acp.copernicus.org/articles/23/4617/2023/acp-23-4617-2023.pdf |
| spellingShingle | K. Čížková K. Čížková K. Láska L. Metelka M. Staněk Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula Atmospheric Chemistry and Physics |
| title | Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula |
| title_full | Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula |
| title_fullStr | Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula |
| title_full_unstemmed | Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula |
| title_short | Assessment of spectral UV radiation at Marambio Base, Antarctic Peninsula |
| title_sort | assessment of spectral uv radiation at marambio base antarctic peninsula |
| url | https://acp.copernicus.org/articles/23/4617/2023/acp-23-4617-2023.pdf |
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