Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions
Northern wetlands may be vulnerable to increased carbon losses from methane (CH4), a potent greenhouse gas, under current warming trends. However, the dynamic nature of open water inundation and wetting/drying patterns may constrain regional emissions, offsetting the potential magnitude of methane r...
Published in: | Environmental Research Letters |
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Ludwig-Maximilians-Universität München
2014
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Online Access: | https://epub.ub.uni-muenchen.de/33535/1/10.1088_1748-9326_9_7_075001.pdf https://epub.ub.uni-muenchen.de/33535/ http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-33535-1 https://doi.org/10.1088/1748-9326/9/7/075001 |
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ftmuenchenepub:oai:epub.ub.uni-muenchen.de:33535 2023-05-15T14:27:01+02:00 Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions Watts, Jennifer D. Kimball, John S. Bartsch, Annett McDonald, Kyle C. 2014-01-01 application/pdf https://epub.ub.uni-muenchen.de/33535/1/10.1088_1748-9326_9_7_075001.pdf https://epub.ub.uni-muenchen.de/33535/ http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-33535-1 https://doi.org/10.1088/1748-9326/9/7/075001 eng eng Ludwig-Maximilians-Universität München Watts, Jennifer D.; Kimball, John S.; Bartsch, Annett; McDonald, Kyle C. (2014): Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions. In: Environmental Research Letters, Vol. 9, Nr. 7, 075001 [PDF, 2MB] https://epub.ub.uni-muenchen.de/33535/1/10.1088_1748-9326_9_7_075001.pdf http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-33535-1 https://epub.ub.uni-muenchen.de/33535/ doi:10.1088/1748-9326/9/7/075001 Environmental Research Letters Department für Geographie ddc:550 doc-type:article Zeitschriftenartikel NonPeerReviewed 2014 ftmuenchenepub https://doi.org/10.1088/1748-9326/9/7/075001 2022-04-25T12:44:38Z Northern wetlands may be vulnerable to increased carbon losses from methane (CH4), a potent greenhouse gas, under current warming trends. However, the dynamic nature of open water inundation and wetting/drying patterns may constrain regional emissions, offsetting the potential magnitude of methane release. Here we conduct a satellite data driven model investigation of the combined effects of surface warming and moisture variability on high northern latitude (>= 45 degrees N) wetland CH4 emissions, by considering (1) sub-grid scale changes in fractional water inundation (Fw) at 15 day, monthly and annual intervals using 25 km resolution satellite microwave retrievals, and (2) the impact of recent (2003-11) wetting/drying on northern CH4 emissions. The model simulations indicate mean summer contributions of 53 Tg CH4 yr(-1) from boreal-Arctic wetlands. Approximately 10% and 16% of the emissions originate from open water and landscapes with emergent vegetation, as determined from respective 15 day Fw means or maximums, and significant increases in regional CH4 efflux were observed when incorporating satellite observed inundated land fractions into the model simulations at monthly or annual time scales. The satellite Fw record reveals widespread wetting across the Arctic continuous permafrost zone, contrasting with surface drying in boreal Canada, Alaska and western Eurasia. Arctic wetting and summer warming increased wetland emissions by 0.56 Tg CH4 yr(-1) compared to the 2003-11 mean, but this was mainly offset by decreasing emissions (-0.38 Tg CH4 yr(-1)) in sub-Arctic areas experiencing surface drying or cooling. These findings underscore the importance of monitoring changes in surface moisture and temperature when assessing the vulnerability of boreal-Arctic wetlands to enhanced greenhouse gas emissions under a shifting climate. Article in Journal/Newspaper Arctic Arctic permafrost Alaska Open Access LMU (Ludwig-Maximilians-University Munich) Arctic Canada Environmental Research Letters 9 7 075001 |
institution |
Open Polar |
collection |
Open Access LMU (Ludwig-Maximilians-University Munich) |
op_collection_id |
ftmuenchenepub |
language |
English |
topic |
Department für Geographie ddc:550 |
spellingShingle |
Department für Geographie ddc:550 Watts, Jennifer D. Kimball, John S. Bartsch, Annett McDonald, Kyle C. Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
topic_facet |
Department für Geographie ddc:550 |
description |
Northern wetlands may be vulnerable to increased carbon losses from methane (CH4), a potent greenhouse gas, under current warming trends. However, the dynamic nature of open water inundation and wetting/drying patterns may constrain regional emissions, offsetting the potential magnitude of methane release. Here we conduct a satellite data driven model investigation of the combined effects of surface warming and moisture variability on high northern latitude (>= 45 degrees N) wetland CH4 emissions, by considering (1) sub-grid scale changes in fractional water inundation (Fw) at 15 day, monthly and annual intervals using 25 km resolution satellite microwave retrievals, and (2) the impact of recent (2003-11) wetting/drying on northern CH4 emissions. The model simulations indicate mean summer contributions of 53 Tg CH4 yr(-1) from boreal-Arctic wetlands. Approximately 10% and 16% of the emissions originate from open water and landscapes with emergent vegetation, as determined from respective 15 day Fw means or maximums, and significant increases in regional CH4 efflux were observed when incorporating satellite observed inundated land fractions into the model simulations at monthly or annual time scales. The satellite Fw record reveals widespread wetting across the Arctic continuous permafrost zone, contrasting with surface drying in boreal Canada, Alaska and western Eurasia. Arctic wetting and summer warming increased wetland emissions by 0.56 Tg CH4 yr(-1) compared to the 2003-11 mean, but this was mainly offset by decreasing emissions (-0.38 Tg CH4 yr(-1)) in sub-Arctic areas experiencing surface drying or cooling. These findings underscore the importance of monitoring changes in surface moisture and temperature when assessing the vulnerability of boreal-Arctic wetlands to enhanced greenhouse gas emissions under a shifting climate. |
format |
Article in Journal/Newspaper |
author |
Watts, Jennifer D. Kimball, John S. Bartsch, Annett McDonald, Kyle C. |
author_facet |
Watts, Jennifer D. Kimball, John S. Bartsch, Annett McDonald, Kyle C. |
author_sort |
Watts, Jennifer D. |
title |
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
title_short |
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
title_full |
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
title_fullStr |
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
title_full_unstemmed |
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions |
title_sort |
surface water inundation in the boreal-arctic: potential impacts on regional methane emissions |
publisher |
Ludwig-Maximilians-Universität München |
publishDate |
2014 |
url |
https://epub.ub.uni-muenchen.de/33535/1/10.1088_1748-9326_9_7_075001.pdf https://epub.ub.uni-muenchen.de/33535/ http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-33535-1 https://doi.org/10.1088/1748-9326/9/7/075001 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Arctic permafrost Alaska |
genre_facet |
Arctic Arctic permafrost Alaska |
op_source |
Environmental Research Letters |
op_relation |
Watts, Jennifer D.; Kimball, John S.; Bartsch, Annett; McDonald, Kyle C. (2014): Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions. In: Environmental Research Letters, Vol. 9, Nr. 7, 075001 [PDF, 2MB] https://epub.ub.uni-muenchen.de/33535/1/10.1088_1748-9326_9_7_075001.pdf http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-33535-1 https://epub.ub.uni-muenchen.de/33535/ doi:10.1088/1748-9326/9/7/075001 |
op_doi |
https://doi.org/10.1088/1748-9326/9/7/075001 |
container_title |
Environmental Research Letters |
container_volume |
9 |
container_issue |
7 |
container_start_page |
075001 |
_version_ |
1766300566272606208 |