Benjamin, Jones

Chris, Maio

Craig, Tweedie

Grosse, Guido

Jenrich, Maren

Strauss, Jens

English

Electronic Publication Information Center

Maren Jenrich, Jens Strauss,  Ben Jones, Craig Tweedie, Chris Maio and Guido GrosseResearch on Arctic Lagoons along the Alaska Beaufort Sea Coast – Perma-X Field Work in April 2022Research focus:linked references:POTSDAMTelegrafenberg A4514473 Potsdam, Germanywww.awi.deStudy areas:unfrozen sediment below lagoons and lakesPlanned future work:deep: vibra-coring systemfor up to 300cm coresshallow: push core system for up to 90cm coresfrozen sediment at frozen ground settingsSIPRE coring system for bottom fast ice locations and permafrost coringWater hydrochemistryon site measurement of water conductivity, temperature and depth using a CastAway CTD devicewater sampling for further lab analyses such as stable isotopes of water, dissoved organic carbon, pH, anions and cationsCoringguido.grosse@awi.demaren.jenrich@awi.de jens.strauss@awi.de@grosse_guido@MarenJenrich @strauss_jensDrilling took place in two study areas on the Alaska NorthSlope: Close to Utqiagvik at Elson Lagoon and TwinLakes (Map 1) and around Teshekpuk Lake (Map 2) 125km further east on the Alaskan Beaufort Sea coast.Map 1: Coring locations atElson Lagoon. Takingsediment and water samplesalong a salt water gradientenables us to study the roleof varying levels of saltwateron the methane productionin wetlands and lagoons.Map 2: Coring at Teshekpuk Lake and the nearby coast.The inland migration of the sea led to the loss of up to1km ice-rich coastal permafrost in 67 years. By samplingon a transect from tundra landscapes (includingthermokarst lakes) into saltwater affected coastalwetlands and lagoons and further offshore, we are able tostudy this regime shift and its effects on the carbonstocks and potential carbon release.Determination of:v lagoon formation processesv soil organic carbon quantity and qualityv current and future greenhouse gas emissions from thawing permafrost deposits (incubation experiments)v carbon sources and degradation states by lipid biomarker analysesv mercury contaminationv pore and surface water composition B.M. Jones, G. Grosse et al. 2022. Lake and drained lake basin systems in lowland permafrost regions. Nature Reviews Earth & EnvironmentG. Hugelius, J. Strauss et al. 2014. Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps. BiogeosciencesM. Jenrich, M. Angelopoulos et al. 2021. Thermokarst Lagoons: A Core-Based Assessment of Depositional Characteristics and an Estimate of Carbon Pools on the Bykovsky Peninsula. Frontiers in Earth ScienceWe thank UIC for the logisticalsupport, especially for the fixing ofsnow machines in remote areas.We further thank Ben Jones, Mikhail Kanevskiy, Alexandra Vereemeva, KenHinkel, Andrew Parsekian, Rodrigo Rangel, Caleb Kaminski, and Noriaki Oharafor their scientific insights and for making the field work as fun as it was.Thanks to Chris Maio and his vibra-coring system we were ableto drill up to 2,5m long unfrozen sediment cores and thanks toCraig Tweedy and LTER wegot to know where to drill them.https://www.teshekpuklake.org/https://ble.lternet.edu/Sea level rise and coastal erosion are one of the maindrivers for the formation of thermokarst lagoons. Theinundation of permafrost with sea water is leading tointensified permafrost thaw and therefore the unlocking offormerly frozen soil organic carbon (SOC). Due to microbialdecomposition, SOC is released as carbon dioxide andmethane, leading to further heating. In April 2022 weconducted field work around Utqiagvik and Teshekpuk LakeObservatory to further study the formation of Arctic lagoonsand its effect on permafrost carbon cycles.bmjones3@alaska.edu@TundraTimectweedie@utep.edu cvmaio@alaska.eduVISIT ALSO: 

Research on Arctic Lagoons along the Alaska Beaufort Sea Coast – Perma-X Field Work in April 2022

https://epic.awi.de/id/eprint/56875/1/AWI_Poster_Lagoons_UIC_anniversary.pdf

Research on Arctic Lagoons along the Alaska Beaufort Sea Coast – Perma-X Field Work in April 2022

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