Seasonal methane emissions from Lagoon Pingo West in Svalbard
Methane is a potent greenhouse gas, with an even stronger climate forcing than carbon dioxide. Therefore, it is important to measure methane emissions. Recent studies on natural methane emissions from the Arctic, focused on methane release from the active layer and shallow permafrost, for example in...
Main Author: | |
---|---|
Format: | Thesis |
Language: | unknown |
Published: |
Institute of Environmental Science and Geography
2022
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/57103/ https://epic.awi.de/id/eprint/57103/1/Thesis_Helene_Koehnen_SUBMIT.pdf https://hdl.handle.net/10013/epic.c53de7d6-016d-4b4d-82af-5511900d68ff https://hdl.handle.net/ |
id |
ftawi:oai:epic.awi.de:57103 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:57103 2023-05-15T15:03:41+02:00 Seasonal methane emissions from Lagoon Pingo West in Svalbard Koehnen, Helene 2022 application/pdf https://epic.awi.de/id/eprint/57103/ https://epic.awi.de/id/eprint/57103/1/Thesis_Helene_Koehnen_SUBMIT.pdf https://hdl.handle.net/10013/epic.c53de7d6-016d-4b4d-82af-5511900d68ff https://hdl.handle.net/ unknown Institute of Environmental Science and Geography https://epic.awi.de/id/eprint/57103/1/Thesis_Helene_Koehnen_SUBMIT.pdf https://hdl.handle.net/ Koehnen, H. (2022) Seasonal methane emissions from Lagoon Pingo West in Svalbard , Bachelor thesis, Universität Potsdam. hdl:10013/epic.c53de7d6-016d-4b4d-82af-5511900d68ff EPIC3Institute of Environmental Science and Geography, 51 p. Thesis NonPeerReviewed 2022 ftawi 2022-09-25T23:12:30Z Methane is a potent greenhouse gas, with an even stronger climate forcing than carbon dioxide. Therefore, it is important to measure methane emissions. Recent studies on natural methane emissions from the Arctic, focused on methane release from the active layer and shallow permafrost, for example in wetlands. In contrast, pingos might act as emission sources for methane from reservoirs beneath the permafrost. A pingo is a landform in permafrost with an inner ice-core. Over the summer season, the icy parts of the pingo might thaw and form a lake. A study in Svalbard in the summer of 2017, measured the methane concentration in samples of a pingo lake, and modelled the flux of methane to the atmosphere. The seasonal methane flux amounted to 46.0 gCH4/100 d/m2. As the seasonal flux was higher than those of surrounding wetlands, pingos were characterized as emission "hotspots" in the Arctic landscape of Svalbard. This study aims to quantify the methane concentration and methane flux from Lagoon Pingo West for the summer seasons of 2020 and 2021. Lagoon Pingo West is fed by the same pingo spring as Lagoon Pingo East, where the study has been conducted in 2017. I used 11 samples over the summer season taken in irregular time intervals between 3-16 days to monitor the methane concentration. In addition, I used an automatic methane analyzer that measured the methane concentration in one-hour steps. The methane flux was calculated using a diffusion model that employed the results of the samples and the analyzer. In August 2021, I could apply chamber measurements that allowed for estimates of the methane flux. I found higher methane concentrations near the inflow in the central part of the lake than at the margins or at the outflow. I could observe a seasonal pattern in methane concentration, that varied with the positions and years. However, all data showed low methane concentrations after the melt season. The seasonal mean of the methane flux was higher in 2021 than in 2020. The diffusion model, using the analyzer data ... Thesis Arctic Ice ice core permafrost Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Svalbard |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Methane is a potent greenhouse gas, with an even stronger climate forcing than carbon dioxide. Therefore, it is important to measure methane emissions. Recent studies on natural methane emissions from the Arctic, focused on methane release from the active layer and shallow permafrost, for example in wetlands. In contrast, pingos might act as emission sources for methane from reservoirs beneath the permafrost. A pingo is a landform in permafrost with an inner ice-core. Over the summer season, the icy parts of the pingo might thaw and form a lake. A study in Svalbard in the summer of 2017, measured the methane concentration in samples of a pingo lake, and modelled the flux of methane to the atmosphere. The seasonal methane flux amounted to 46.0 gCH4/100 d/m2. As the seasonal flux was higher than those of surrounding wetlands, pingos were characterized as emission "hotspots" in the Arctic landscape of Svalbard. This study aims to quantify the methane concentration and methane flux from Lagoon Pingo West for the summer seasons of 2020 and 2021. Lagoon Pingo West is fed by the same pingo spring as Lagoon Pingo East, where the study has been conducted in 2017. I used 11 samples over the summer season taken in irregular time intervals between 3-16 days to monitor the methane concentration. In addition, I used an automatic methane analyzer that measured the methane concentration in one-hour steps. The methane flux was calculated using a diffusion model that employed the results of the samples and the analyzer. In August 2021, I could apply chamber measurements that allowed for estimates of the methane flux. I found higher methane concentrations near the inflow in the central part of the lake than at the margins or at the outflow. I could observe a seasonal pattern in methane concentration, that varied with the positions and years. However, all data showed low methane concentrations after the melt season. The seasonal mean of the methane flux was higher in 2021 than in 2020. The diffusion model, using the analyzer data ... |
format |
Thesis |
author |
Koehnen, Helene |
spellingShingle |
Koehnen, Helene Seasonal methane emissions from Lagoon Pingo West in Svalbard |
author_facet |
Koehnen, Helene |
author_sort |
Koehnen, Helene |
title |
Seasonal methane emissions from Lagoon Pingo West in Svalbard |
title_short |
Seasonal methane emissions from Lagoon Pingo West in Svalbard |
title_full |
Seasonal methane emissions from Lagoon Pingo West in Svalbard |
title_fullStr |
Seasonal methane emissions from Lagoon Pingo West in Svalbard |
title_full_unstemmed |
Seasonal methane emissions from Lagoon Pingo West in Svalbard |
title_sort |
seasonal methane emissions from lagoon pingo west in svalbard |
publisher |
Institute of Environmental Science and Geography |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/57103/ https://epic.awi.de/id/eprint/57103/1/Thesis_Helene_Koehnen_SUBMIT.pdf https://hdl.handle.net/10013/epic.c53de7d6-016d-4b4d-82af-5511900d68ff https://hdl.handle.net/ |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Ice ice core permafrost Svalbard |
genre_facet |
Arctic Ice ice core permafrost Svalbard |
op_source |
EPIC3Institute of Environmental Science and Geography, 51 p. |
op_relation |
https://epic.awi.de/id/eprint/57103/1/Thesis_Helene_Koehnen_SUBMIT.pdf https://hdl.handle.net/ Koehnen, H. (2022) Seasonal methane emissions from Lagoon Pingo West in Svalbard , Bachelor thesis, Universität Potsdam. hdl:10013/epic.c53de7d6-016d-4b4d-82af-5511900d68ff |
_version_ |
1766335537211244544 |