Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow
Depth-integrated production rates of OH radicals and NO2 molecules from snowpacks in Ny-Alesund, Svalbard, are calculated from fieldwork investigating the light penetration depth (e-folding depth) and nadir reflectivity of snowpacks during the unusually warm spring of 2006. Light penetration depths...
Published in: | Journal of Geophysical Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://repository.royalholloway.ac.uk/items/b3355f9d-d9ec-d228-cfef-bd7e7db30426/3/ https://doi.org/10.1029/2011JF002019 |
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ftholloway:oai:repository.royalholloway.ac.uk:b3355f9d-d9ec-d228-cfef-bd7e7db30426/3 2023-05-15T14:03:29+02:00 Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow France, J. L. King, Martin Lee-Taylor, J. Beine, H. J. Ianniello, A. Domine, F. MacArthur, A. 2011-1-11 application/pdf https://repository.royalholloway.ac.uk/items/b3355f9d-d9ec-d228-cfef-bd7e7db30426/3/ https://doi.org/10.1029/2011JF002019 eng eng http://www.agu.org/pubs/crossref/2011/2011JF002019.shtml https://repository.royalholloway.ac.uk/items/b3355f9d-d9ec-d228-cfef-bd7e7db30426/3/ http://dx.doi.org/10.1029/2011JF002019 Journal of Geophysical Research, 116 OZONE DEPLETION EVENTS HYDROGEN-PEROXIDE ANTARCTIC SNOW SOUTH-POLE NITRATE SOLUTIONS BOUNDARY-LAYER ABSORPTION-SPECTRUM CARBONYL-COMPOUNDS INTERSTITIAL AIR NITROGEN-DIOXIDE Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion 2011 ftholloway https://doi.org/10.1029/2011JF002019 2022-09-26T12:52:01Z Depth-integrated production rates of OH radicals and NO2 molecules from snowpacks in Ny-Alesund, Svalbard, are calculated from fieldwork investigating the light penetration depth (e-folding depth) and nadir reflectivity of snowpacks during the unusually warm spring of 2006. Light penetration depths of 8.1, 11.3, 5.1, and 8.2 cm were measured for fresh, old, marine-influenced, and glacial snowpacks, respectively (wavelength 400 nm). Radiative-transfer calculations of the light penetration depths with reflectivity measurements produced scattering cross sections of 5.3, 9.5, 20, and 25.5 m(2) kg(-1) and absorption cross sections of 7.7, 1.4, 3.4, and 0.5 cm(2) kg(-1) for the fresh, old, marine-influenced, and glacial snowpacks, respectively (wavelength 400 nm). Photolysis rate coefficients, J, are presented as a function of snow depth and solar zenith angle for the four snowpacks for the photolysis of H2O2 and NO3-. Depth-integrated production rates of hydroxyl radicals are 1270, 2130, 950, and 1850 nmol m(-2) h(-1) (solar zenith angle of 60 degrees) for fresh, old, marine-influenced, and glacial snowpacks, respectively. Depth-integrated production rates of NO2 are 32, 56, 11, and 22 nmol m(-2) h(-1) (solar zenith angle of 60 degrees) for the fresh, old, marine-influenced, and glacial snowpacks, respectively. The uncertainty of repeated light penetration depth measurement was determined to be similar to 20%, which propagates into a 20% error in depth-integrated production rates. A very simple steady state hydroxyl radical calculation demonstrates that a pseudo first-order loss rate of OH radicals of similar to 10(2)-10(4) s(-1) is required in snowpack. The snowpacks around Ny-Alesund are thick enough to be considered optically infinite. Article in Journal/Newspaper Antarc* Antarctic Arctic South pole South pole Svalbard Royal Holloway University of London: Royal Holloway Digital Repository Antarctic Arctic South Pole Svalbard Journal of Geophysical Research 116 F4 |
institution |
Open Polar |
collection |
Royal Holloway University of London: Royal Holloway Digital Repository |
op_collection_id |
ftholloway |
language |
English |
topic |
OZONE DEPLETION EVENTS HYDROGEN-PEROXIDE ANTARCTIC SNOW SOUTH-POLE NITRATE SOLUTIONS BOUNDARY-LAYER ABSORPTION-SPECTRUM CARBONYL-COMPOUNDS INTERSTITIAL AIR NITROGEN-DIOXIDE Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry |
spellingShingle |
OZONE DEPLETION EVENTS HYDROGEN-PEROXIDE ANTARCTIC SNOW SOUTH-POLE NITRATE SOLUTIONS BOUNDARY-LAYER ABSORPTION-SPECTRUM CARBONYL-COMPOUNDS INTERSTITIAL AIR NITROGEN-DIOXIDE Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry France, J. L. King, Martin Lee-Taylor, J. Beine, H. J. Ianniello, A. Domine, F. MacArthur, A. Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
topic_facet |
OZONE DEPLETION EVENTS HYDROGEN-PEROXIDE ANTARCTIC SNOW SOUTH-POLE NITRATE SOLUTIONS BOUNDARY-LAYER ABSORPTION-SPECTRUM CARBONYL-COMPOUNDS INTERSTITIAL AIR NITROGEN-DIOXIDE Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry |
description |
Depth-integrated production rates of OH radicals and NO2 molecules from snowpacks in Ny-Alesund, Svalbard, are calculated from fieldwork investigating the light penetration depth (e-folding depth) and nadir reflectivity of snowpacks during the unusually warm spring of 2006. Light penetration depths of 8.1, 11.3, 5.1, and 8.2 cm were measured for fresh, old, marine-influenced, and glacial snowpacks, respectively (wavelength 400 nm). Radiative-transfer calculations of the light penetration depths with reflectivity measurements produced scattering cross sections of 5.3, 9.5, 20, and 25.5 m(2) kg(-1) and absorption cross sections of 7.7, 1.4, 3.4, and 0.5 cm(2) kg(-1) for the fresh, old, marine-influenced, and glacial snowpacks, respectively (wavelength 400 nm). Photolysis rate coefficients, J, are presented as a function of snow depth and solar zenith angle for the four snowpacks for the photolysis of H2O2 and NO3-. Depth-integrated production rates of hydroxyl radicals are 1270, 2130, 950, and 1850 nmol m(-2) h(-1) (solar zenith angle of 60 degrees) for fresh, old, marine-influenced, and glacial snowpacks, respectively. Depth-integrated production rates of NO2 are 32, 56, 11, and 22 nmol m(-2) h(-1) (solar zenith angle of 60 degrees) for the fresh, old, marine-influenced, and glacial snowpacks, respectively. The uncertainty of repeated light penetration depth measurement was determined to be similar to 20%, which propagates into a 20% error in depth-integrated production rates. A very simple steady state hydroxyl radical calculation demonstrates that a pseudo first-order loss rate of OH radicals of similar to 10(2)-10(4) s(-1) is required in snowpack. The snowpacks around Ny-Alesund are thick enough to be considered optically infinite. |
format |
Article in Journal/Newspaper |
author |
France, J. L. King, Martin Lee-Taylor, J. Beine, H. J. Ianniello, A. Domine, F. MacArthur, A. |
author_facet |
France, J. L. King, Martin Lee-Taylor, J. Beine, H. J. Ianniello, A. Domine, F. MacArthur, A. |
author_sort |
France, J. L. |
title |
Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
title_short |
Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
title_full |
Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
title_fullStr |
Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
title_full_unstemmed |
Calculations of in-snow NO2 and OH radical photochemical production and photolysis rates: A field and radiative-transfer study of the optical properties of Arctic (Ny-Alesund, Svalbard) snow |
title_sort |
calculations of in-snow no2 and oh radical photochemical production and photolysis rates: a field and radiative-transfer study of the optical properties of arctic (ny-alesund, svalbard) snow |
publishDate |
2011 |
url |
https://repository.royalholloway.ac.uk/items/b3355f9d-d9ec-d228-cfef-bd7e7db30426/3/ https://doi.org/10.1029/2011JF002019 |
geographic |
Antarctic Arctic South Pole Svalbard |
geographic_facet |
Antarctic Arctic South Pole Svalbard |
genre |
Antarc* Antarctic Arctic South pole South pole Svalbard |
genre_facet |
Antarc* Antarctic Arctic South pole South pole Svalbard |
op_source |
Journal of Geophysical Research, 116 |
op_relation |
http://www.agu.org/pubs/crossref/2011/2011JF002019.shtml https://repository.royalholloway.ac.uk/items/b3355f9d-d9ec-d228-cfef-bd7e7db30426/3/ http://dx.doi.org/10.1029/2011JF002019 |
op_doi |
https://doi.org/10.1029/2011JF002019 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
F4 |
_version_ |
1766274176669188096 |