# Greenland Ice Sheet Holocene Ice Mass Loss Simulations and Climate Reconstructions #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/30172 # Description: NOAA Landing Page # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/briner2020/briner2020holocene-ice-loss.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Data Type: Paleoclimate Modeling # # Dataset DOI: # # Parameter_Keywords: other model #-------------------- # Contribution_Date # Date: 2020-07-20 #-------------------- # File_Last_Modified_Date # Date: 2020-07-20 #-------------------- # Title # Study_Name: Greenland Ice Sheet Holocene Ice Mass Loss Simulations and Climate Reconstructions #-------------------- # Investigators # Investigators: Briner, J.P.; Cuzzone, J.K.; Badgeley, J.A.; Steig, E.J.; Morlighem, M.; Schlegel, N.-J.; Larour, E. #-------------------- # Description_Notes_and_Keywords # Description: Greenland ice sheet mass loss simulations from an ensemble (n=9) spanning 12,000 years ago to 1850 CE. # It also includes Gt/yr data from an ensemble of simulations from 1850 to 2012 CE, and Gt/yr data from an ensemble of # simulations from 2000-2100 CE following representative concentration pathway climates as part of CMIP6/ISMIP6. # Gridded temperature and precipitation reconstructions for the past 20,000 years are also included in netCDF file format. # Greenland gridded temperature and precipitation reconstructions are from data assimilation of ice-core data and a transient climate model. # # Provided Keywords: ice sheet model, Holocene, Greenland Ice Sheet, Ice mass loss, mass loss rate, 2100, RCP, Paleoclimate, climate change # #-------------------- # Publication # Authors: Jason P. Briner, Joshua K. Cuzzone, Jessica A. Badgeley, Nicolás E. Young, Eric J. Steig, Mathieu Morlighem, Nicole-Jeanne Schlegel, Gregory J. Hakim, Joerg M. Schaefer, Jesse V. Johnson, Alia J. Lesnek, Elizabeth K. Thomas, Estelle Allan, Ole Bennike, Allison A. Cluett, Beata Csatho, Anne de Vernal, Jacob Downs, Eric Larour, Sophie Nowicki # Published_Date_or_Year: 2020-10-01 # Published_Title: Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century # Journal_Name: Nature # Volume: 586 # Edition: # Issue: 7827 # Pages: 70-74 # Report_Number: # DOI: 10.1038/s41586-020-2742-6 # Online_Resource: https://www.nature.com/articles/s41586-020-2742-6 # Full_Citation: # Abstract: The Greenland Ice Sheet (GIS) is losing mass at a high rate. Given the short-term nature of the observational record, it is difficult to assess the historical importance of this mass-loss trend. Unlike records of greenhouse gas concentrations and global temperature, in which observations have been merged with palaeoclimate datasets, there are no comparably long records for rates of GIS mass change. Here we reveal unprecedented mass loss from the GIS this century, by placing contemporary and future rates of GIS mass loss within the context of the natural variability over the past 12,000 years. We force a high-resolution ice-sheet model with an ensemble of climate histories constrained by ice-core data. Our simulation domain covers southwestern Greenland, the mass change of which is dominated by surface mass balance. The results agree favourably with an independent chronology of the history of the GIS margin. The largest pre-industrial rates of mass loss (up to 6,000 billion tonnes per century) occurred in the early Holocene, and were similar to the contemporary (ad 2000-2018) rate of around 6,100 billion tonnes per century. Simulations of future mass loss from southwestern GIS, based on Representative Concentration Pathway (RCP) scenarios corresponding to low (RCP2.6) and high (RCP8.5) greenhouse gas concentration trajectories, predict mass loss of between 8,800 and 35,900 billion tonnes over the twenty-first century. These rates of GIS mass loss exceed the maximum rates over the past 12,000 years. Because rates of mass loss from the southwestern GIS scale linearly with the GIS as a whole, our results indicate, with high confidence, that the rate of mass loss from the GIS will exceed Holocene rates this century. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: 1504267 #------------------ # Site_Information # Site_Name: Greenland Ice Sheet # Location: North America>Greenland # Country: Greenland # Northernmost_Latitude: 87.16 # Southernmost_Latitude: 53.81 # Easternmost_Longitude: -3.75 # Westernmost_Longitude: -86.25 # Elevation: #------------------ # Data_Collection # Collection_Name: Briner2020HoloceneIceLoss # Earliest_Year: 12000 # Most_Recent_Year: 100 # Time_Unit: Cal. Year BP # Core_Length: # Notes: #------------------ # Chronology_Information # Chronology: # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: one per line, shortname-tab-variable components (what, material, error, units, seasonality, data type,detail, method, C or N for Character or Numeric data, free text) # ## age age, , , calendar year before present, , paleoclimatic modeling, , ,N, ## sim1 ice mass loss, , , gigaton per century, ,paleoclimatic modeling,,,N,simulation 1 ## sim2 ice mass loss, , , gigaton per century, ,paleoclimatic modeling,,,N,simulation 2 ## sim3 ice mass loss, , , gigaton per century, ,paleoclimatic modeling,,,N,simulation 3 ## sim4 ice mass loss, , , gigaton per century, ,paleoclimatic modeling,,,N,simulation 4 ## sim5 ice mass loss, , , gigaton per century, ,paleoclimatic modeling,,,N,simulation 5 ## sim6 ice mass loss, , , gigaton per century, ,paleoclimatic 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