Fuchs, Matthias; Jones, Miriam C; Gowan, Evan J; Frolking, Steve; Walter Anthony, Katey M; Grosse, Guido; Jones, Benjamin M; O'Donnel, Jonathan; Brosius, Laura Susan; Treat, Claire C: Modeled timing of flooding for the Beringian shelf for the past 20,000 years [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.960150 (dataset in review)
Abstract:
The paleo bathymetry grids (PaleoMIST 1.0 (Gowan et al. 2021) were used to calculate the timing of flooding in the Beringia study region. The resulting GeoTiff (Year of flooding.tif) has a spatial resolution of 5,000 m and each pixel contains the modeled time of flooding (in yrs BP), e.g., when this location was flooded by rising sea levels. PaleoMIST 1.0 is a glacial isostatic adjustment-based paleo topographic reconstruction model that includes relative sea level and paleo bathymetry as an output. The model was created to estimate the sea level contribution of the global ice sheets and is validated using observations of relative sea level change. To estimate the timing of flooding, nine of the PaleoMIST 1.0 raster data sets (20,000 yrs BP to 0 yrs BP, with 2,500 years time steps) were used. In order to estimate the timing of flooding for each pixel, we first calculated the linear increase (or decrease) for each pixel between two sequential PaleoMIST 1.0 grids to establish grids for every 1,000 years. In addition, we calculated the timing of flooding for each pixel, again by assuming a linear transition between two sequential grids. The timing of flooding was then determined as the point in time when a pixel elevation value relative to sea level switched from positive (>0; above sea level) to negative (<0; below sea level). These two procedures allowed us to estimate the area, which became flooded in each 1,000-year time interval from 20,000 yrs BP to present (0 yrs BP). The associated files can be imported, read and viewed with a geographic information system software or through a programming language.
Supplement to:
Fuchs, Matthias; et al. (in review): Methane flux from Beringian coastal wetlands for the past 20,000 years.
References:
Gowan, Evan J; Zhang, Xu; Khosravi, Sara; Rovere, Alessio; Stocchi, Paolo; Hughes, Anna L C; Gyllencreutz, Richard; Mangerud, Jan; Svendsen, John Inge; Lohmann, Gerrit (2021): A new global ice sheet reconstruction for the past 80 000 years. Nature Communications, 12, 1199, https://doi.org/10.1038/s41467-021-21469-w
Project(s):
Funding:
European Research Council (ERC), grant/award no. 851181: The role of non-growing season processes in the methane and nitrous oxide budgets in pristine northern ecosystems
National Science Foundation (NSF), grant/award no. 1903623: Collaborative Research: Sea-level rise, coastal wetland expansion, and proglacial lake contributions to abrupt increases in northern atmospheric CH4 during the last deglaciation
National Science Foundation (NSF), grant/award no. 1903735: Collaborative Research: Sea-level rise, coastal wetland expansion, and proglacial lake contributions to abrupt increases in northern atmospheric CH4 during the last deglaciation
National Science Foundation (NSF), grant/award no. 1927553: Collaborative Research: AccelNet: Permafrost Coastal Systems Network (PerCS-Net) -- A Circumpolar Alliance for Arctic Coastal Community Information Exchange
Coverage:
Median Latitude: 60.287250 * Median Longitude: -179.373750 * South-bound Latitude: 47.011000 * West-bound Longitude: 101.020000 * North-bound Latitude: 73.940000 * East-bound Longitude: -100.185000
Event(s):
Comment:
The zip file contains a geotiff with the following characteristics:
Coordinate system: WGS_1984_North_Pole_LAEA_Bering_Sea
Pixel resolution: 5002,109008 m
Extent:
Top: -339202,380295
Left: -1757023,18307
Right: 1904520,61079
Bottom: -4280864,2786
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
542.4 kBytes