# Northeast Brazil Heinrich Stadial 4 Speleothem d18O Data #----------------------------------------------------------------------- # 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/25990 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/barriguda2019tbr14d18o.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Speleothems # # Dataset DOI: # # Parameter_Keywords: oxygen isotopes #-------------------- # Contribution_Date # Date: 2019-01-23 #-------------------- # File_Last_Modified_Date # Date: 2019-01-23 #-------------------- # Title # Study_Name: Northeast Brazil Heinrich Stadial 4 Speleothem d18O Data #-------------------- # Investigators # Investigators: Wendt, K.A.; Häuselmann, A.D.; Fleitmann, D.; Berry, A.E.; Wang, X.; Auler, A.S.; Cheng, H.; Edwards, R.L. #-------------------- # Description_Notes_and_Keywords # Description: High-resolution speleothem oxygen isotope (d18O) data plus CFLM images from 3 stalagmites collected in 2 northeastern Brazil caves (Toca da BoaVista and Toca da Barriguda) over Heinrich Stadial 4 (~39ka). # Provided Keywords: Heinrich Stadial, ITCZ, speleothem, NE Brazil, pluvial phase, luminescent couplet #-------------------- # Publication # Authors: Kathleen A. Wendt, Anamaria D. Häuselmann, Dominik Fleitmann, Akemi E. Berry, Xianfeng Wang, Augusto S. Auler, Hai Cheng, R. Lawrence Edwards # Published_Date_or_Year: 2019-03-15 # Published_Title: Three-phased Heinrich Stadial 4 recorded in NE Brazil stalagmites # Journal_Name: Earth and Planetary Science Letters # Volume: 510 # Edition: # Issue: # Pages: 94-102 # Report_Number: # DOI: 10.1016/j.epsl.2018.12.025 # Online_Resource: https://www.sciencedirect.com/science/article/pii/S0012821X18307404 # Full_Citation: # Abstract: The growth intervals of stalagmites from Northeast (NE) Brazil provide precise information on the timing of pluvial periods associated with the southward shift of the Intertropical Convergence Zone (ITCZ) during Heinrich Stadials (HS). Using 230Th dating and annual band counting, we constrained the timing of the pluvial period associated with HS4 to occur between 40.06 ± 0.11 and 38.38 ± 0.10 thousand years before present (kyr B.P.), coinciding with the interval between the end of Greenland Interstadial (GIS)/Chinese Interstadial (CIS) 9 and GIS/CIS 8. Oxygen isotope analysis shows a close anti-correlation between NE Brazil wet periods and East Asian monsoon intensity recorded in Hulu Cave, supporting the hypothesis of a southerly migration of the global ITCZ during HS4. The pluvial anomaly can be divided into three phases, starting with a precursor, less intense pluvial interval (phase 1) between 40.06 ± 0.11 and kyr B.P., likely correlative to the cool phase of the North Atlantic immediately before the partial collapse of the Laurentide Ice Sheet (LIS). This phase ends abruptly (<30 yr) and is followed by an intense pluvial phase (phase 2) that spans approximately 5 centuries. Luminescent couplets are identified in all samples between 39.50 ± 0.10 and 39.41 ± 0.10 kyr B.P., and are interpreted as a period of two rainy seasons per year during which the southernmost extent of the inland West Atlantic ITCZ reached south of our study site (10 S). Following the end of phase 2 at 39.07 ± 0.32 kyr B.P., intermittent speleothem growth suggests intermittent rainfall over NE Brazil (phase 3) until the abrupt onset of GIS/CIS 8 at 38.38 ± 0.10 kyr B.P. The phases identified in NE Brazilian stalagmites agree with the three-phased variation in low-latitude proxies registered in Northern Greenland, and are consistent with changes in methane concentrations recorded in the West Antarctic Ice Sheet (WAIS) Divide. The synchronicity of these distant records suggests a multi-phased response of tropical atmospheric circulation during HS4. The timescales surrounding the LIS collapse, as inferred from our precisely dated stalagmites, are on the same order as recent predictions for the impending collapse of the WAIS and may therefore serve as a past analogue. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: 1337693, 1702816, 1103403 #------------------ # Funding_Agency # Funding_Agency_Name: National Natural Science Foundation of China # Grant: 41731174 #------------------ # Funding_Agency # Funding_Agency_Name: Singapore National Research Foundation Fellowship # Grant: NRFF2011-08 #------------------ # Site_Information # Site_Name: Toca da Barriguda (TBR) # Location: South America>Brazil # Country: Brazil # Northernmost_Latitude: -10.1602 # Southernmost_Latitude: -10.1602 # Easternmost_Longitude: -40.8605 # Westernmost_Longitude: -40.8605 # Elevation: 600 m #------------------ # Data_Collection # Collection_Name: Barriguda2019TBR14 # Earliest_Year: 39588 # Most_Recent_Year: 39066 # 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_calBP age, , , calendar years before present, , , , ,N, hiatus 38379-39105 yrBP ## age_calBPerr age error, , 2 sigma +/-, calendar years before present, , , , ,N, ## d18OcarbVPDB delta18O, calcium carbonate, , per mil VPDB, ,speleothems,,isotope ratio mass spectrometry,N, # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_calBP age_calBPerr d18OcarbVPDB 39066 322 -4.71 39069 322 -5.46 39072 322 -4.87 39075 318 39078 314 -5.23 39082 309 -5.19 39085 305 -5.08 39088 301 -5.29 39091 296 -5.7 39095 292 -5.76 39098 288 -5.73 39101 284 -5.86 39104 279 -6.44 39107 276 -6.34 39110 273 -6.51 39112 270 -6.69 39115 267 -6.54 39118 264 -6.77 39120 261 -6.26 39123 258 -6 39126 255 -5.97 39128 252 -6.15 39131 249 -6.16 39134 246 -6.63 39136 242 -6.74 39139 239 39142 236 -6.81 39144 233 -6.94 39147 230 -7.18 39150 227 39152 224 -6.4 39155 221 -6.02 39158 217 -5.34 39161 213 -5.38 39164 209 -5.81 39167 205 -6.32 39171 200 -6.8 39174 196 -7.4 39177 192 -7.15 39180 188 -7.63 39183 183 -7.5 39187 179 39190 175 -7.12 39193 174 -6.79 39195 172 -7.08 39198 171 -6.98 39201 170 -7.17 39204 169 -7.65 39206 167 -7.53 39209 166 -7.35 39212 165 -7.04 39215 164 -7.36 39217 162 -7.77 39220 161 -6.98 39222 160 -6.6 39224 159 -6.73 39226 158 -6.89 39229 157 39231 156 -7.6 39233 155 -8.64 39236 154 -8.52 39238 153 -8.19 39240 152 -7.96 39243 150 -7.55 39245 149 -7.42 39247 148 -8.08 39250 147 -8.3 39252 146 -8.09 39254 145 -8.05 39257 144 -8.12 39259 143 -8.26 39261 142 -7.94 39264 141 -6.99 39266 140 39268 139 -6.47 39271 138 -6.55 39273 136 -6.62 39275 135 -6.77 39278 134 -7.09 39280 133 -7.24 39283 132 -8.08 39285 131 -8.46 39287 130 -8.52 39290 129 -8.19 39292 127 -7.86 39294 126 -7.41 39297 125 -7.44 39299 124 -7.77 39301 123 -7.9 39304 122 -8.44 39306 121 -8.61 39309 120 -8.8 39311 118 -8.72 39313 117 -8.32 39315 116 -7.99 39318 115 -7.79 39320 114 -7.81 39322 113 -7.48 39325 112 -7.45 39327 111 -7.88 39329 110 -8.46 39332 109 -8.81 39334 107 -8.98 39337 106 -9.17 39340 105 -8.84 39342 104 -8.55 39345 102 -8.32 39348 101 -8.56 39351 100 -8.46 39354 99 -8.59 39357 97 -8.67 39359 96 -8.36 39362 95 -7.94 39365 95 -7.15 39368 96 -6.83 39371 96 -6.69 39374 97 -6.69 39377 97 -6.9 39380 97 -6.93 39383 98 -7.12 39386 98 -7.11 39389 99 -7.02 39392 99 -8.05 39394 100 -6.33 39397 100 -6.21 39399 100 -6.4 39402 101 -6.26 39405 101 -6.24 39407 102 -6.29 39410 102 -6.43 39412 103 -6.51 39415 103 -6.48 39417 103 -6.48 39420 104 -6.34 39423 104 -6.38 39425 105 -6.91 39428 105 -7.2 39430 105 -7.56 39433 106 -7.44 39436 106 -7.36 39438 107 -7.45 39441 107 -7.44 39443 107 -7.78 39446 108 -7.78 39448 108 -7.43 39451 108 -7.83 39454 109 -7.35 39456 109 -7.15 39459 109 -6.88 39461 110 -6.86 39464 110 -6.91 39466 110 -8.21 39469 110 -8.2 39472 111 -8.46 39475 111 -8.46 39478 112 -8.48 39481 112 -8.37 39484 112 -7.82 39487 113 -7.41 39490 113 39494 113 39497 114 -7.55 39500 114 -7.68 39503 119 -7.65 39506 123 -7.59 39509 128 -7.62 39512 133 -7.59 39515 137 -7.56 39518 142 -7.64 39522 146 -7.81 39525 151 -8.32 39528 156 -8.38 39531 160 -8.34 39534 163 -7.82 39536 166 -7.76 39539 169 -7.78 39541 172 -7.96 39544 175 -7.85 39546 178 -8.06 39549 181 -8.16 39552 184 -8.48 39554 187 -7.95 39557 190 -6.7 39560 195 -8.4 39563 199 -7.78 39566 204 -7.96 39569 208 -7.85 39572 212 -8.06 39576 217 -8.16 39579 221 -8.48 39582 226 -7.95 39585 230 -6.7 39588 234 -8.4