Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 University of Potsdam UP http://www.uni-potsdam.de https://ror.org/03bnmw459 Prodinger Maria Maria.prodinger@awi.de Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Universität Hamburg UHH http://www.uni-hamburg.de https://ror.org/00g30e956 Nitze Ingmar ingmar.nitze@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/ingmar-nitze.html 0000-0002-1165-6852 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Grosse Guido guido.grosse@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/guido-grosse.html 0000-0001-5895-2141 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 University of Potsdam UP http://www.uni-potsdam.de https://ror.org/03bnmw459 Strauss Jens Jens.Strauss@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/jens-strauss.html 0000-0003-4678-4982 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 2024 Pan-Arctic thermokarst lagoon distribution, area and classification dataset https://doi.org/10.1594/PANGAEA.968886 2024-07-05T15:07:13 Thermokarst lagoons develop in permafrost lowlands along the ice-rich Arctic coast when thermokarst lakes or basins with bottom elevations at or below sea level are breached by the sea due to erosion, sea-level rise, or connection via drainage channels. Thermokarst lagoons, as dynamic landforms at the interface of terrestrial permafrost and marine systems, play a crucial role in the transformation of permafrost carbon under rising marine influence. Here we present a comprehensive dataset consisting of the first manual thermokarst lagoon area mapping, a more precise number of thermokarst lagoons and a detailed lagoon classification for thermokarst lagoons along the pan-Arctic coast from Taymyr Peninsula in Russia to the Tuktoyaktuk Peninsula in Canada. This is an updated dataset based on the previous work of Jenrich et al. 2021 and Jenrich et al. 2023. The main improvements include (1) counting thermokarst lagoons individually within a lagoon system, as long as the distinct round form of former lake basins is visible; (2) manually calculating the area for all mapped thermokarst lagoons based on the updated Global Surface Water Dataset from 1984-2021 by Pekel et al., 2016; and (3) classifying lagoons based on connectivity to the sea into 5 connectivity classes. We identified 520 thermokarst lagoons covering an area of 3457 km2. Methods: Pan-Arctic thermokarst lagoon distribution and area were mapped using QGIS version 3.34 and Google Earth Engine. The updated Global Surface Water Dataset by Pekel et al., 2016, based on Landsat-5, -7, and -8 satellite images from 1984-2021, was used to create masks with a threshold of >75% based on water occurrence, which enabled the manual splitting of polygons from the resulting mask vector data and extraction of thermokarst lagoon areas. Mapping and area extraction also relied on Sentinel-2 imagery from 2023/07/01-2023/08/30, basemaps Google Satellite and ESRI Satellite, and the digital elevation model ArcticDEM and its hillshade HSarcticDEM (Porter et al., 2018). The thermokarst lagoon classification employed a geomorphological approach based on Sentinel-2 imagery and basemaps Google Satellite and ESRI Satellite. Connectivity classes were visually defined and attributed to thermokarst lagoons based on: 1) the size of the lagoon opening relative to its overall size, 2) whether it was directly connected or subsequent within a lagoon system, and 3) interactivity within the lagoon system. The five classes range from 5 - very high connectivity to 1 - very low connectivity: 5 - Lagoon, always open (Lao) - Very high connectivity - Lagoon in direct exchange with the sea. 4 - Lagoon, mostly open (Lmo) - High connectivity - Barrier islands or sand spits only slightly block exchange with the sea or subsequent lagoon which is very well connected to the primary lagoon. 3 - Lagoon, semi-open (Lso) - Medium connectivity - Exchange limited either temporally or spatially due to barrier islands and sand spits or subsequent lagoon which is well connected to the primary lagoon. 2 - Lagoon, limited open (Llo) - Low connectivity - Exchange very limited due to very small opening or narrow channel or subsequent lagoon which is less connected to primary lagoon due to small channel or high distance. 1 - Lagoon, nearly-closed (Lnc) - Very low connectivity - Exchange strongly limited due to long and narrow channel, or subsequent lagoon with very limited exchange. Temporary lake characteristics are possible. Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Angelopoulos Michael michael.angelopoulos@tum.de 0000-0003-2574-5108 Overduin Pier Paul Paul.Overduin@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/paul-overduin.html 0000-0001-9849-4712 Nitze Ingmar ingmar.nitze@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/ingmar-nitze.html 0000-0002-1165-6852 Günther Frank guenther@hs-nb.de 0000-0001-8298-8937 Strauss Jens Jens.Strauss@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/jens-strauss.html 0000-0003-4678-4982 Westermann Sebastian Sebastian.Westermann@geo.uio.no http://www.mn.uio.no/geo/english/people/aca/geogr/sebaswe/index.html 0000-0003-0514-4321 Schirrmeister Lutz lutz.schirrmeister@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/lutz-schirrmeister.html 0000-0001-9455-0596 Kholodov Alexander L alkholodov@alaska.edu Krautblatter Michael m.krautblatter@tum.de 0000-0002-2775-2742 Grigoriev Mikhail N migri@mail.rz 0000-0003-1997-9506 Grosse Guido guido.grosse@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/guido-grosse.html 0000-0001-5895-2141 2021 Distribution of lagoons along the Arctic coast from the Taimyr Peninsula in Russia to the Tuktoyaktuk Peninsula in Canada dataset https://doi.org/10.1594/PANGAEA.934158 Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Nitze Ingmar ingmar.nitze@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/ingmar-nitze.html 0000-0002-1165-6852 Laboor Sebastian sebastian.laboor@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/sebastian-laboor.html 0000-0003-4229-8418 Angelopoulos Michael michael.angelopoulos@tum.de 0000-0003-2574-5108 Grosse Guido guido.grosse@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/guido-grosse.html 0000-0001-5895-2141 Strauss Jens Jens.Strauss@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/jens-strauss.html 0000-0003-4678-4982 2023 Spatial extent of thermokarst lagoons along pan-Arctic coasts - an upscaling approach dataset https://doi.org/10.1594/PANGAEA.948267 Pekel Jean-Francois 0000-0002-9992-6385 Cottam Andrew Gorelick Noel 0000-0002-5548-2436 Belward Alan S 2016 High-resolution mapping of global surface water and its long-term changes journal article Nature 540(7633) https://doi.org/10.1038/nature20584 418-422 Porter Claire Morin Paul pauljmorin@gmail.com Howat Ian M 0000-0002-8072-6260 Noh Myoung-Jong Bates Brian Peterman Kenneth Keesey Scott Schlenk Matthew Gardiner Judith Tomko Karen Willis Michael Kelleher Cole Cloutier Michael Husby Eric Foga Steven Nakamura Hitomi Platson Melisa Wethington Michael, Jr Williamson Cathleen Bauer Gregory Enos Jeremy Arnold Galen Kramer William Becker Peter Doshi Abhijit D'Souza Cristelle Cummens Pat Laurier Fabien Bojesen Mikkel 2018 ArcticDEM Harvard Dataverse, V1 https://doi.org/10.7910/DVN/OHHUKH -134.493 126.304 69.469 73.408 -4.0944999999999965 71.4385 1984-01-01T00:00:00 2021-12-31T00:00:00 KoPF Carbon in Permafrost / Kohlenstoff im Permafrost Alfred Wegener Institute - Research Unit Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 CACOON Changing Arctic Carbon cycle in the cOastal Ocean Near-shore https://www.changing-arctic-ocean.ac.uk/project/cacoon/ Alfred Wegener Institute - Research Unit Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 PETA-CARB Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool https://www.awi.de/en/science/junior-groups/peta-carb.html Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 Federal Ministry of Education and Research BMBF https://www.bmbf.de/ https://doi.org/10.13039/501100002347 03F0764B Verbundprojekt: WTZ Russland - KoPf; Kohlenstoffumsatz und Treibhausgasfreisetzung aus tauendem Permafrost Nordostsibiriens unter sich ändernden Umwelt- und Klimabedingungen https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0764B Federal Ministry of Education and Research BMBF https://www.bmbf.de/ https://doi.org/10.13039/501100002347 03F0764F Verbundprojekt: WTZ Russland - KoPf; Kohlenstoffumsatz und Treibhausgasfreisetzung aus tauendem Permafrost Nordostsibiriens unter sich ändernden Umwelt- und Klimabedingungen https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0764F Federal Ministry of Education and Research BMBF https://www.bmbf.de/ https://doi.org/10.13039/501100002347 03F0806A WTZ Großbritannien: CACOON - Veränderung des arktischen Kohlenstoffkreislaufs im küstennahen Ozean https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0806A Natural Environment Research Council NERC http://www.nerc.ac.uk/ https://doi.org/10.13039/501100000270 NE/R012806/1 Changing Arctic Carbon cycle in the cOastal Ocean Near-shore Seventh Framework Programme of the European Commission FP7 https://doi.org/10.13039/100011102 338335 Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool https://cordis.europa.eu/project/id/338335 Arctic_lagoons_1984-2021 73.408 126.304 1984-01-01T00:00:00 69.469 -134.493 2021-12-31T00:00:00 Satellite imagery SATI Landsat-5, -7, and -8 satellite images from 1984 to 2021 9 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ File content Content Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Content Binary Object Binary Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Binary Binary Object (File Size) Binary (Size) Bytes Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Binary (Size) [Bytes] Comment Comment Jenrich Maren maren.jenrich@awi.de 0000-0002-1330-7461 Comment CurationLevelB Basic curation https://wiki.pangaea.de/wiki/Curation_levels citable Classification connectivity lagoon size Permafrost coasts shapefile Thermokarst Lagoon author105590 author20118 author21807 author23502 author26967 author31625 author37158 author40084 author43620 author44494 author45227 author55779 author57624 author61634 author67117 author68516 author68521 author77501 author82989 author82990 author82991 author82992 author83551 author86310 author86311 author86312 author86313 author86314 author86315 author86316 author86317 author86318 author86319 author86320 author86321 author86322 author86323 author86324 author86325 author86326 author86327 author86328 author86329 author86330 author86331 author86332 author86333 award242 award243 award323 award324 award752 curlevel20 event3168514 funder1797 funder20473 funder20486 geocode1599 geocode1600 geocode1601 inst20456 inst21044 inst21210 inst32 inst33 journal11658 license21 method13604 param146419 param1570 param99583 pi77501 project4203 project4434 project4435 ref109389 ref111389 refds934158 refds948267 term47257 term50987 term52001 term60227 term69405 term74211