# Patriot Hills, West Antarctica Last Glacial Transition dD Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 2.0 # 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/21691 # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/patriot/patriot2017dd.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Cores # # Parameter_Keywords: hydrogen isotopes #-------------------- # Contribution_Date # Date: 2017-03-19 #-------------------- # Title # Study_Name: Patriot Hills, West Antarctica Last Glacial Transition dD Data #-------------------- # Investigators # Investigators: Fogwill, C.J.; Turney, C.S.M.; Golledge, N.R.; Etheridge, D.M.; Rubino, M.; Thornton, D.P.; Baker, A.; Woodward, J.; Winter, K.; van Ommen, T.D.; Moy, A.D.; Curran, M.A.J.; Davies, S.M.; Weber, M.E.; Bird, M.I.; Munksgaard, N.C.; Menviel, L.; Rootes, C.M.; Ellis, B.; Millman, M.; Vohra, J.; Rivera, A.; Cooper, A. #-------------------- # Description_and_Notes # Description: Ice core hydrogen isotope (dD) data from the Patriot Hills blue ice area, Antarctica, from the Last Glacial Transition (11,000 to 24,000 years before present). # Provided Keywords: Last Glacial Transition, Weddell Sea, Patriot Hills Blue ice area, Antarctica #-------------------- # Publication # Authors: C.J. Fogwill, C.S.M. Turney, N.R. Golledge, D.M. Etheridge, M. Rubino, D.P. Thornton, A. Baker, J. Woodward, K. Winter, T.D. van Ommen, A.D. Moy, M.A.J. Curran, S.M. Davies, M.E. Weber, M.I. Bird, N.C. Munksgaard, L. Menviel, C.M. Rootes, B. Ellis, H. Millman, J. Vohra, A. Rivera, A. Cooper # Published_Date_or_Year: 2017-01-05 # Published_Title: Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination # Journal_Name: Scientific Reports # Volume: 7 # Edition: 39979 # Issue: # Pages: # Report_Number: # DOI: 10.1038/srep39979 # Online_Resource: http://www.nature.com/articles/srep39979 # Full_Citation: # Abstract: Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial Termination (LGT; 18,000-11,650 yrs ago) allows us to disentangle ice-climate feedbacks that are key to improving future projections. Whilst the sequence of events during this period is reasonably well-known, relatively poor chronological control has precluded precise alignment of ice, atmospheric and marine records, making it difficult to assess relationships between Antarctic ice-sheet (AIS) dynamics, climate change and sea level. Here we present results from a highly-resolved 'horizontal ice core' from the Weddell Sea Embayment, which records millennial-scale AIS dynamics across this extensive region. Counterintuitively, we find AIS mass-loss across the full duration of the Antarctic Cold Reversal (ACR; 14,600-12,700 yrs ago), with stabilisation during the subsequent millennia of atmospheric warming. Earth-system and ice-sheet modelling suggests these contrasting trends were likely Antarctic-wide, sustained by feedbacks amplified by the delivery of Circumpolar Deep Water onto the continental shelf. Given the anti-phase relationship between inter-hemispheric climate trends across the LGT our findings demonstrate that Southern Ocean-AIS feedbacks were controlled by global atmospheric teleconnections. With increasing stratification of the Southern Ocean and intensification of mid-latitude westerly winds today, such teleconnections could amplify AIS mass loss and accelerate global sea-level rise. #------------------ # Funding_Agency # Funding_Agency_Name: Australian Research Council # Grant: #------------------ # Site_Information # Site_Name: Patriot Hills Blue Ice 2013-2014 # Location: Antarctica # Country: # Northernmost_Latitude: -80.3 # Southernmost_Latitude: -80.3 # Easternmost_Longitude: -81.35 # Westernmost_Longitude: -81.35 # Elevation: 800 m #------------------ # Data_Collection # Collection_Name: Patriot2017dD # Earliest_Year: 23988 # Most_Recent_Year: 11174 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology_Information # Chronology: # # Distance along profile (depth / dip corrected) Dage (years) WDC upper age lower age Attributed corrected age Type of constraint # (years) (years) trace gas, tephra or volcanic horizon # 10 (10) 320 75,660 28.04 52,170 Trace gas # 190 (190) N/A N/A N/A 36,400 Tephra SDMA_5951 # 200 (200) 400 40,970 35,190 33,290 Trace gas # 279 (279) N/A N/A N/A 18,200 Tephra WCM93-25 # 282 (282) N/A N/A N/A 17,800 Volcanic horizon # 300 (297) 250 15,580 15,280 15,430 Trace gas # 320 (318) 220 12,770 12,730 12,750 Trace gas # 340 (339) 220 11,880 11,780 11,830 Trace gas # 360 (357) 220 13,790 11,000 11,700 Trace gas # 390 (384) 150 13,010 1,950 7,480 Trace gas # 400 (394) 150 12,940 5,500 6,350 Trace gas # 800 (792) 150 4,230 550 2,390 Trace gas # # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## dist_m Distance along transect of blue ice, , , meters, , , , ,N ## age_calBP age, , , calendar years before present, , , , ,N ## d2HiceSMOW delta2H, ice, , per mil SMOW, , Ice cores, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # dist_m age_calBP d2HiceSMOW 247 23988 -345.076 248 23841 -337.271 249 23693 -341.833 250 23546 -347.008 251 23399 -350.023 252 23251 -357.645 253 23104 -345.318 254 22957 -355.652 255 22809 -352.364 256 22662 -347.245 257 22515 -352.313 258 22367 -354.099 259 22220 -351.989 260 22073 -358.075 261 21925 -360.600 262 21778 -333.780 263 21631 -341.381 264 21483 -362.458 265 21336 -355.771 266 21189 -345.487 267 21041 -342.832 268 20894 -352.702 269 20747 -356.041 270 20599 -337.191 271 20452 -337.439 272 20305 -333.587 273 20157 -333.243 274 20010 -329.933 275 19863 -309.609 276 19715 -321.575 277 19568 -345.170 278 19421 -353.078 279 19273 -330.848 280 19126 -330.237 281 18979 -313.086 282 18831 -327.743 283 18684 -322.342 284 18537 -325.840 285 18389 -320.901 286 18242 -333.267 287 18095 -330.822 288 17947 -325.037 289 17800 -333.608 290 17653 -328.722 291 17505 -326.463 292 17358 -315.657 293 17211 -334.408 294 17063 -356.846 295 16916 -333.395 296 16769 -328.777 297 16621 -334.348 298 16474 -333.309 299 16327 -341.264 300 16179 -344.135 301 16032 -345.121 302 15885 -351.205 303 15737 -341.316 304 15590 -345.921 305 15465 -347.603 306 15340 -333.826 307 15216 -341.857 308 15091 -334.011 309 14966 -332.802 310 14841 -340.736 311 14717 -349.194 312 14592 -337.329 313 14467 -324.017 314 14342 -344.267 315 14218 -346.958 316 14093 -320.205 317 13968 -329.094 318 13843 -322.318 319 13719 -325.155 320 13594 -333.342 321 13469 -324.664 322 13344 -316.237 323 13220 -300.315 324 13095 -317.064 325 12970 -301.284 326 12926 -288.994 327 12882 -300.611 328 12839 -292.921 329 12795 -293.873 330 12751 -303.606 331 12707 -298.778 332 12663 -299.204 333 12620 -301.019 334 12576 -299.591 335 12532 -295.414 336 12488 -297.785 337 12444 -304.072 338 12400 -286.094 339 12357 -296.820 340 12313 -317.788 341 12269 -295.614 342 12225 -306.488 343 12181 -292.040 344 12138 -302.805 345 12094 -305.468 346 12050 -292.153 347 12006 -302.044 348 11962 -301.311 349 11919 -291.974 350 11875 -299.893 351 11831 -301.160 352 11787 -289.592 353 11743 -300.807 354 11700 -265.505 355 11656 -286.833 356 11612 -296.947 357 11568 -312.397 358 11524 -262.375 359 11480 -257.302 360 11437 -251.418 361 11393 -263.825 362 11349 -272.561 363 11305 -264.682 364 11261 -260.610 365 11218 -272.700 366 11174 -256.233