Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air
Molecular hydrogen (H2) is an abundant and reactive constituent of Earth's atmosphere, with links to climate and air quality. Anthropogenic emissions of H2 are expected to rise as the use of H2 as an energy source increases. Documenting past variations in atmospheric H2 will help to validate cu...
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ftcdlib:oai:escholarship.org/ark:/13030/qt6vk3n2nt 2023-05-15T18:21:49+02:00 Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air Patterson, JD Aydin, M Crotwell, AM Petron, G Severinghaus, JP Saltzman, ES 2020-07-28 application/pdf https://escholarship.org/uc/item/6vk3n2nt unknown eScholarship, University of California qt6vk3n2nt https://escholarship.org/uc/item/6vk3n2nt public Geophysical Research Letters, vol 47, iss 14 Meteorology & Atmospheric Sciences article 2020 ftcdlib 2021-06-28T17:06:39Z Molecular hydrogen (H2) is an abundant and reactive constituent of Earth's atmosphere, with links to climate and air quality. Anthropogenic emissions of H2 are expected to rise as the use of H2 as an energy source increases. Documenting past variations in atmospheric H2 will help to validate current understanding of the global H2 budget. The modern instrumental record begins in the 1980s; there is little information about atmospheric H2 prior to that time. Here, we use firn air measurements from a 2001 South Pole campaign to reconstruct atmospheric H2 levels over the 20th century. Inversion of the measurements indicates that H2 over South Pole has increased from 350–540ppb from 1910–2000. A biogeochemical box model indicates that the atmospheric burden of H2 increased by 37% over that time. The rise in H2 is consistent with increasing H2 emissions from fossil fuel combustion and increasing atmospheric production from methane oxidation. Article in Journal/Newspaper South pole University of California: eScholarship South Pole |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences |
spellingShingle |
Meteorology & Atmospheric Sciences Patterson, JD Aydin, M Crotwell, AM Petron, G Severinghaus, JP Saltzman, ES Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
topic_facet |
Meteorology & Atmospheric Sciences |
description |
Molecular hydrogen (H2) is an abundant and reactive constituent of Earth's atmosphere, with links to climate and air quality. Anthropogenic emissions of H2 are expected to rise as the use of H2 as an energy source increases. Documenting past variations in atmospheric H2 will help to validate current understanding of the global H2 budget. The modern instrumental record begins in the 1980s; there is little information about atmospheric H2 prior to that time. Here, we use firn air measurements from a 2001 South Pole campaign to reconstruct atmospheric H2 levels over the 20th century. Inversion of the measurements indicates that H2 over South Pole has increased from 350–540ppb from 1910–2000. A biogeochemical box model indicates that the atmospheric burden of H2 increased by 37% over that time. The rise in H2 is consistent with increasing H2 emissions from fossil fuel combustion and increasing atmospheric production from methane oxidation. |
format |
Article in Journal/Newspaper |
author |
Patterson, JD Aydin, M Crotwell, AM Petron, G Severinghaus, JP Saltzman, ES |
author_facet |
Patterson, JD Aydin, M Crotwell, AM Petron, G Severinghaus, JP Saltzman, ES |
author_sort |
Patterson, JD |
title |
Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
title_short |
Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
title_full |
Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
title_fullStr |
Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
title_full_unstemmed |
Atmospheric History of H2 Over the Past Century Reconstructed From South Pole Firn Air |
title_sort |
atmospheric history of h2 over the past century reconstructed from south pole firn air |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/6vk3n2nt |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Geophysical Research Letters, vol 47, iss 14 |
op_relation |
qt6vk3n2nt https://escholarship.org/uc/item/6vk3n2nt |
op_rights |
public |
_version_ |
1766201136941891584 |