Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands
Abstract Soils are important sources of nitric oxide (NO) and nitrous acid (HONO) in the atmosphere. These nitrogen (N)-containing gases play a crucial role in atmospheric chemistry and climate at different scales because of reactions modulated by NO and hydroxyl radicals (OH), which are formed via...
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crioppubl:10.1088/1748-9326/ac4f8e 2024-09-15T18:29:43+00:00 Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands Bhattarai, Hem Raj Marushchak, Maija E Ronkainen, Jussi Lamprecht, Richard E Siljanen, Henri M P Martikainen, Pertti J Biasi, Christina Maljanen, Marja Academy of Finland 2022 http://dx.doi.org/10.1088/1748-9326/ac4f8e https://iopscience.iop.org/article/10.1088/1748-9326/ac4f8e https://iopscience.iop.org/article/10.1088/1748-9326/ac4f8e/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 2, page 024034 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac4f8e 2024-08-12T04:14:50Z Abstract Soils are important sources of nitric oxide (NO) and nitrous acid (HONO) in the atmosphere. These nitrogen (N)-containing gases play a crucial role in atmospheric chemistry and climate at different scales because of reactions modulated by NO and hydroxyl radicals (OH), which are formed via HONO photolysis. Northern permafrost soils have so far remained unexplored for HONO and NO emissions despite their high N stocks, capacity to emit nitrous oxide (N 2 O), and enhancing mineral N turnover due to warming and permafrost thawing. Here, we report the first HONO and NO emissions from high-latitude soils based on measurements of permafrost-affected subarctic peatlands. We show large HONO (0.1–2.4 µ g N m −2 h −1 ) and NO (0.4–59.3 µ g N m −2 h −1 ) emissions from unvegetated peat surfaces, rich with mineral N, compared to low emissions (⩽0.2 µ g N m −2 h −1 for both gases) from adjacent vegetated surfaces (experiments with intact peat cores). We observed HONO production under highly variable soil moisture conditions from dry to wet. However, based on complementary slurry experiments, HONO production was strongly favored by high soil moisture and anoxic conditions. We suggest urgent examination of other Arctic landscapes for HONO and NO emissions to better constrain the role of these reactive N gases in Arctic atmospheric chemistry. Article in Journal/Newspaper permafrost Subarctic IOP Publishing Environmental Research Letters 17 2 024034 |
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Abstract Soils are important sources of nitric oxide (NO) and nitrous acid (HONO) in the atmosphere. These nitrogen (N)-containing gases play a crucial role in atmospheric chemistry and climate at different scales because of reactions modulated by NO and hydroxyl radicals (OH), which are formed via HONO photolysis. Northern permafrost soils have so far remained unexplored for HONO and NO emissions despite their high N stocks, capacity to emit nitrous oxide (N 2 O), and enhancing mineral N turnover due to warming and permafrost thawing. Here, we report the first HONO and NO emissions from high-latitude soils based on measurements of permafrost-affected subarctic peatlands. We show large HONO (0.1–2.4 µ g N m −2 h −1 ) and NO (0.4–59.3 µ g N m −2 h −1 ) emissions from unvegetated peat surfaces, rich with mineral N, compared to low emissions (⩽0.2 µ g N m −2 h −1 for both gases) from adjacent vegetated surfaces (experiments with intact peat cores). We observed HONO production under highly variable soil moisture conditions from dry to wet. However, based on complementary slurry experiments, HONO production was strongly favored by high soil moisture and anoxic conditions. We suggest urgent examination of other Arctic landscapes for HONO and NO emissions to better constrain the role of these reactive N gases in Arctic atmospheric chemistry. |
author2 |
Academy of Finland |
format |
Article in Journal/Newspaper |
author |
Bhattarai, Hem Raj Marushchak, Maija E Ronkainen, Jussi Lamprecht, Richard E Siljanen, Henri M P Martikainen, Pertti J Biasi, Christina Maljanen, Marja |
spellingShingle |
Bhattarai, Hem Raj Marushchak, Maija E Ronkainen, Jussi Lamprecht, Richard E Siljanen, Henri M P Martikainen, Pertti J Biasi, Christina Maljanen, Marja Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
author_facet |
Bhattarai, Hem Raj Marushchak, Maija E Ronkainen, Jussi Lamprecht, Richard E Siljanen, Henri M P Martikainen, Pertti J Biasi, Christina Maljanen, Marja |
author_sort |
Bhattarai, Hem Raj |
title |
Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
title_short |
Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
title_full |
Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
title_fullStr |
Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
title_full_unstemmed |
Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands |
title_sort |
emissions of atmospherically reactive gases nitrous acid and nitric oxide from arctic permafrost peatlands |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac4f8e https://iopscience.iop.org/article/10.1088/1748-9326/ac4f8e https://iopscience.iop.org/article/10.1088/1748-9326/ac4f8e/pdf |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_source |
Environmental Research Letters volume 17, issue 2, page 024034 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac4f8e |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
2 |
container_start_page |
024034 |
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1810471145814622208 |