The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra
Inland waters are an ubiquitous feature of Arctic landscapes, with carbon (C) and nutrient cycles that are closely coupled to terrestrial processes. They act as important conduits of terrestrial matter by not only transporting but also actively storing and processing it, subsequently emitting greenh...
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Conference Object |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://orbi.uliege.be/handle/2268/255064 https://orbi.uliege.be/bitstream/2268/255064/1/AGU2020_poster.pdf |
id |
ftorbi:oai:orbi.ulg.ac.be:2268/255064 |
---|---|
record_format |
openpolar |
spelling |
ftorbi:oai:orbi.ulg.ac.be:2268/255064 2024-10-13T14:04:56+00:00 The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra Martyn Rosco, M Dean, J Borges, Alberto Vonk, J Dolman, AJ FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2020-12 on-line (COVID-19 restrictions) https://orbi.uliege.be/handle/2268/255064 https://orbi.uliege.be/bitstream/2268/255064/1/AGU2020_poster.pdf en eng https://orbi.uliege.be/handle/2268/255064 info:hdl:2268/255064 https://orbi.uliege.be/bitstream/2268/255064/1/AGU2020_poster.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess AGU Fall Meeting 2020, 7 – 11 December 2020 Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2020 ftorbi 2024-09-27T07:01:54Z Inland waters are an ubiquitous feature of Arctic landscapes, with carbon (C) and nutrient cycles that are closely coupled to terrestrial processes. They act as important conduits of terrestrial matter by not only transporting but also actively storing and processing it, subsequently emitting greenhouse gases (GHG) of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O)to the atmosphere. Amplified climate warming at northern high-latitudes is changing contemporary carbon and nitrogen cyclesand driving permafrost thawing which has the potential to mobilise organic matter from vast stocks stored in Arctic tundra permafrost soils. Released carbon and nitrogen becomes available to degradation producing GHGs which inland waters emit to the atmosphere, thus forming a positive feedback to climate change. GHG emissions from tundra ecosystems vary regionally with local environmental and climate factors. Dissolved GHG concentrations in collected samples from the Indigirka watershed were measured and fluxes computed during three growing seasons (2015, 2016, 2017) to provide insight into the role of each type of aquatic system in this region. Fluvial CO2 and CH4fluxes (85.7 ± 29.7 mmol C/m2/ d, 10.6 ± 27.3 mmol C/m2/ d, respectively mean ± STD) were the highest, followed by pond fluxes (30.0 ± 21.0 mmol C/m2/ d, 4.9 ± 9.4 mmol/m2/ d) and finally fluxes from lake sites (8.6 ± 7.6 mmol C/m2/ d, 0.84± 0.57 mmol/m2/ d). The aim of this study was to quantify the effect of inland water emissions on the landscape C exchange. This was done by using remote sensing information to upscale emissions and integrate them into the terrestrial C exchange of the study area. As N2O has a large warming potential and received scant attention in the Arctic biome so far its contribution to terrestrial aquatic fluxes wasalso assessed. The effect of an extensive flooding event in 2017 on the landscape GHG exchange was also evaluated since increased flooding occurrence is what climate change might hold for this region. Greater insight into ... Conference Object Arctic Climate change permafrost Tundra University of Liège: ORBi (Open Repository and Bibliography) Arctic Indigirka ENVELOPE(149.609,149.609,70.929,70.929) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
spellingShingle |
Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Martyn Rosco, M Dean, J Borges, Alberto Vonk, J Dolman, AJ The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
topic_facet |
Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
Inland waters are an ubiquitous feature of Arctic landscapes, with carbon (C) and nutrient cycles that are closely coupled to terrestrial processes. They act as important conduits of terrestrial matter by not only transporting but also actively storing and processing it, subsequently emitting greenhouse gases (GHG) of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O)to the atmosphere. Amplified climate warming at northern high-latitudes is changing contemporary carbon and nitrogen cyclesand driving permafrost thawing which has the potential to mobilise organic matter from vast stocks stored in Arctic tundra permafrost soils. Released carbon and nitrogen becomes available to degradation producing GHGs which inland waters emit to the atmosphere, thus forming a positive feedback to climate change. GHG emissions from tundra ecosystems vary regionally with local environmental and climate factors. Dissolved GHG concentrations in collected samples from the Indigirka watershed were measured and fluxes computed during three growing seasons (2015, 2016, 2017) to provide insight into the role of each type of aquatic system in this region. Fluvial CO2 and CH4fluxes (85.7 ± 29.7 mmol C/m2/ d, 10.6 ± 27.3 mmol C/m2/ d, respectively mean ± STD) were the highest, followed by pond fluxes (30.0 ± 21.0 mmol C/m2/ d, 4.9 ± 9.4 mmol/m2/ d) and finally fluxes from lake sites (8.6 ± 7.6 mmol C/m2/ d, 0.84± 0.57 mmol/m2/ d). The aim of this study was to quantify the effect of inland water emissions on the landscape C exchange. This was done by using remote sensing information to upscale emissions and integrate them into the terrestrial C exchange of the study area. As N2O has a large warming potential and received scant attention in the Arctic biome so far its contribution to terrestrial aquatic fluxes wasalso assessed. The effect of an extensive flooding event in 2017 on the landscape GHG exchange was also evaluated since increased flooding occurrence is what climate change might hold for this region. Greater insight into ... |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Conference Object |
author |
Martyn Rosco, M Dean, J Borges, Alberto Vonk, J Dolman, AJ |
author_facet |
Martyn Rosco, M Dean, J Borges, Alberto Vonk, J Dolman, AJ |
author_sort |
Martyn Rosco, M |
title |
The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
title_short |
The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
title_full |
The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
title_fullStr |
The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
title_full_unstemmed |
The role of inland freshwaters in summer CO2, CH4 and N2O emissions from north-eastern Siberian Arctic tundra |
title_sort |
role of inland freshwaters in summer co2, ch4 and n2o emissions from north-eastern siberian arctic tundra |
publishDate |
2020 |
url |
https://orbi.uliege.be/handle/2268/255064 https://orbi.uliege.be/bitstream/2268/255064/1/AGU2020_poster.pdf |
long_lat |
ENVELOPE(149.609,149.609,70.929,70.929) |
geographic |
Arctic Indigirka |
geographic_facet |
Arctic Indigirka |
genre |
Arctic Climate change permafrost Tundra |
genre_facet |
Arctic Climate change permafrost Tundra |
op_source |
AGU Fall Meeting 2020, 7 – 11 December 2020 |
op_relation |
https://orbi.uliege.be/handle/2268/255064 info:hdl:2268/255064 https://orbi.uliege.be/bitstream/2268/255064/1/AGU2020_poster.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1812810755130523648 |