# Dry Tortugas, Florida Younger Dryas Grain Size 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/31796 # Description: NOAA Landing Page # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/toomey2017/toomey2017gs.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Data Type: Paleoceanography # # Dataset DOI: # # Parameter_Keywords: physical properties #-------------------- # Contribution_Date # Date: 2020-11-03 #-------------------- # File_Last_Modified_Date # Date: 2020-11-03 #-------------------- # Title # Study_Name: Dry Tortugas, Florida Younger Dryas Grain Size Data #-------------------- # Investigators # Investigators: Toomey, M.R.; Korty, R.L.; Donnelly, J.P.; van Hengstum, P.J.; Curry, W.B. #-------------------- # Description_Notes_and_Keywords # Description: Grain size data from core KNR166-2 JPC25 collected near the Dry Tortugas, Southwest Florida margin, spanning the Younger Dryas interval (~13 - 10 kyr BP). # Provided keywords: ocean circulation, turbidite, Yonger Dryas #-------------------- # Publication # Authors: Michael R. Toomey, Robert L. Korty, Jeffrey P. Donnelly, Peter J. van Hengstum, William B. Curry # Published_Date_or_Year: 2017-11-01 # Published_Title: Increased hurricane frequency near Florida during Younger Dryas Atlantic Meridional Overturning Circulation slowdown # Journal_Name: Geology # Volume: 45 # Edition: # Issue: 11 # Pages: 1047-1050 # Report_Number: # DOI: 10.1130/G39270.1 # Online_Resource: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/45/11/1047/519209/Increased-hurricane-frequency-near-Florida-during # Full_Citation: # Abstract: The risk posed by intensification of North Atlantic hurricane activity remains controversial, in part due to a lack of available storm proxy records that extend beyond the relatively stable climates of the late Holocene. Here we present a record of storm-triggered turbidite deposition offshore the Dry Tortugas, south Florida, USA, that spans abrupt transitions in North Atlantic sea-surface temperature and Atlantic Meridional Overturning Circulation (AMOC) during the Younger Dryas (12.9-11.7 ka). Despite potentially hostile conditions for cyclogenesis in the tropical North Atlantic at that time, our record and numerical experiments suggest that strong hurricanes may have regularly affected Florida. Less severe surface cooling at mid-latitudes (~20-40N) than across much of the tropical North Atlantic (~10-20N) in response to AMOC reduction may best explain strong hurricane activity during the Younger Dryas near the Dry Tortugas and possibly along the entire southeastern coast of the United States. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: KNR166-2-25JPC # Location: Ocean>Atlantic Ocean>North Atlantic Ocean>Gulf Of Mexico # Country: # Northernmost_Latitude: 24.34 # Southernmost_Latitude: 24.34 # Easternmost_Longitude: -83.25 # Westernmost_Longitude: -83.25 # Elevation: #------------------ # Data_Collection # Collection_Name: Toomey2017GS # Earliest_Year: 12898 # Most_Recent_Year: 10206 # 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) # ## depth depth, , , centimeter, , paleoceanography, , ,N, Core depths corrected for desiccation during storage and reported to nearest centimeter ## age age, , , calendar kiloyear before present, , paleoceanography, , ,N, Linear sedimentation rate used between tie-points ## mean_grain_size grain size mean, sediment, , micrometer, ,paleoceanography,,,N, Bulk mean grain-size measured on Beckman Coulter LS13320 and reported to nearest micron # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth age mean_grain_size 169 10.206 18 170 10.217 18 171 10.228 17 172 10.240 18 173 10.251 21 174 10.263 22 175 10.274 19 176 10.285 22 177 10.297 16 178 10.308 16 179 10.319 20 180 10.331 19 181 10.342 13 182 10.353 18 183 10.365 19 184 10.376 22 185 10.388 19 186 10.399 19 187 10.410 20 188 10.422 18 189 10.433 19 190 10.444 19 191 10.456 19 192 10.467 19 193 10.478 19 194 10.490 18 195 10.501 18 196 10.513 19 197 10.524 19 198 10.535 17 199 10.547 17 200 10.558 19 201 10.569 20 202 10.581 20 203 10.592 19 204 10.603 21 205 10.615 23 206 10.626 19 207 10.638 13 208 10.649 13 209 10.660 21 210 10.672 20 211 10.683 19 212 10.694 21 213 10.706 20 214 10.717 20 215 10.728 20 216 10.740 20 217 10.751 20 218 10.763 19 219 10.774 19 220 10.785 18 221 10.797 19 222 10.808 20 223 10.819 19 224 10.831 22 225 10.842 20 226 10.853 18 227 10.865 18 228 10.876 18 229 10.888 17 230 10.899 21 231 10.910 19 232 10.922 15 233 10.933 21 234 10.944 18 235 10.956 19 236 10.967 17 237 10.978 18 238 10.990 17 239 11.001 16 240 11.013 17 241 11.024 17 242 11.035 17 243 11.047 18 244 11.058 17 245 11.069 17 246 11.081 16 247 11.092 16 248 11.103 18 249 11.115 18 250 11.126 18 251 11.138 17 252 11.149 20 253 11.160 20 254 11.172 20 255 11.183 18 256 11.194 23 257 11.206 19 258 11.217 19 259 11.228 13 260 11.240 14 261 11.251 18 262 11.263 20 263 11.274 18 264 11.285 18 265 11.297 21 266 11.308 19 267 11.319 20 268 11.331 22 269 11.342 20 270 11.353 22 271 11.365 22 272 11.376 20 273 11.388 20 274 11.399 20 275 11.410 17 276 11.422 17 277 11.433 17 278 11.444 19 279 11.456 20 280 11.467 21 281 11.478 16 282 11.490 17 283 11.501 20 284 11.513 20 285 11.524 23 286 11.535 24 287 11.547 22 288 11.558 22 289 11.569 23 290 11.581 22 291 11.592 22 292 11.603 21 293 11.615 22 294 11.626 22 295 11.638 19 296 11.650 19 297 11.661 20 298 11.673 20 299 11.684 20 300 11.696 21 301 11.702 20 302 11.705 20 303 11.709 21 304 11.712 20 305 11.715 18 306 11.718 18 307 11.721 19 308 11.725 19 309 11.728 19 310 11.731 19 311 11.734 19 312 11.737 18 313 11.741 19 314 11.744 16 315 11.747 20 316 11.750 20 317 11.753 19 318 11.757 20 319 11.760 19 320 11.763 20 321 11.766 20 322 11.769 18 323 11.773 18 324 11.776 19 325 11.779 19 326 11.782 20 327 11.785 18 328 11.789 22 329 11.792 19 330 11.795 19 331 11.798 19 332 11.801 18 333 11.805 20 334 11.808 20 335 11.811 20 336 11.814 19 337 11.817 21 338 11.821 21 339 11.824 21 340 11.827 21 341 11.830 24 342 11.833 22 344 11.837 18 345 11.840 20 346 11.843 21 347 11.846 21 348 11.849 20 349 11.853 21 350 11.856 22 351 11.859 22 352 11.862 25 353 11.865 27 354 11.869 23 355 11.872 23 356 11.875 24 357 11.878 23 358 11.882 24 359 11.885 27 360 11.888 25 361 11.891 25 362 11.894 24 363 11.898 32 364 11.901 34 365 11.904 30 366 11.907 32 367 11.910 21 368 11.914 22 369 11.917 25 370 11.920 21 371 11.923 19 372 11.926 22 373 11.930 22 374 11.933 19 375 11.936 20 376 11.939 21 377 11.942 21 378 11.946 20 379 11.949 21 380 11.952 21 381 11.955 20 382 11.958 20 383 11.962 19 384 11.965 21 385 11.968 23 386 11.971 20 387 11.974 20 388 11.978 22 389 11.981 20 390 11.984 17 391 11.987 29 392 11.990 21 393 11.994 15 394 11.997 19 396 12.000 23 397 12.003 22 398 12.006 19 399 12.010 19 400 12.013 17 401 12.016 23 402 12.019 21 403 12.022 20 404 12.026 18 405 12.029 27 406 12.032 25 407 12.035 25 408 12.038 21 409 12.042 23 410 12.045 23 411 12.048 22 412 12.051 23 413 12.055 24 414 12.058 23 415 12.061 23 416 12.064 20 417 12.067 22 418 12.071 26 419 12.074 20 420 12.077 19 421 12.080 21 422 12.083 23 423 12.087 24 424 12.090 24 425 12.093 23 426 12.096 22 427 12.099 22 428 12.103 14 429 12.106 15 430 12.109 19 431 12.112 21 432 12.115 23 433 12.119 21 434 12.122 23 435 12.125 24 436 12.128 22 437 12.131 20 438 12.135 20 439 12.138 21 440 12.141 18 441 12.144 19 442 12.147 18 443 12.151 20 444 12.154 24 445 12.157 19 447 12.160 20 448 12.163 20 449 12.167 24 450 12.170 25 451 12.173 23 452 12.176 21 453 12.179 22 454 12.182 21 455 12.186 24 456 12.189 23 457 12.192 18 458 12.195 17 459 12.198 22 460 12.201 23 461 12.204 16 462 12.208 22 463 12.211 23 464 12.214 29 465 12.217 30 466 12.220 33 467 12.223 26 468 12.227 23 469 12.230 26 470 12.233 46 471 12.236 25 472 12.239 57 473 12.242 29 474 12.246 27 475 12.249 25 476 12.252 35 477 12.255 27 478 12.258 21 479 12.261 22 480 12.265 20 481 12.268 19 482 12.271 20 483 12.274 21 484 12.277 26 485 12.280 24 486 12.284 26 487 12.287 25 488 12.290 23 489 12.293 22 490 12.296 30 491 12.299 23 492 12.303 21 493 12.306 21 494 12.309 23 495 12.312 23 496 12.315 23 497 12.318 22 498 12.321 22 499 12.325 22 500 12.328 24 501 12.331 23 502 12.334 24 503 12.337 21 504 12.340 18 505 12.344 21 506 12.347 27 507 12.350 24 508 12.353 23 509 12.356 25 510 12.359 26 511 12.363 27 512 12.366 25 513 12.369 25 514 12.372 25 515 12.375 24 516 12.378 23 517 12.382 24 518 12.385 22 519 12.388 25 520 12.391 23 521 12.394 19 522 12.397 20 523 12.401 19 524 12.404 19 525 12.407 18 526 12.410 21 527 12.413 19 528 12.416 20 529 12.419 20 530 12.423 19 531 12.426 18 532 12.429 20 533 12.432 20 534 12.435 21 535 12.438 22 536 12.442 22 537 12.445 21 538 12.448 23 539 12.451 25 540 12.454 28 541 12.457 28 542 12.461 26 543 12.464 25 544 12.467 26 545 12.470 27 546 12.473 26 547 12.476 44 548 12.480 29 549 12.483 29 550 12.486 30 551 12.489 24 552 12.492 22 553 12.495 25 554 12.499 24 555 12.502 22 556 12.505 24 557 12.508 29 558 12.511 22 559 12.514 22 560 12.518 28 561 12.521 22 562 12.524 21 563 12.527 19 564 12.530 23 565 12.533 22 566 12.536 22 567 12.540 22 568 12.543 23 569 12.546 24 570 12.549 24 571 12.552 25 572 12.555 25 573 12.559 20 574 12.562 22 575 12.565 21 576 12.568 23 577 12.571 23 578 12.574 24 579 12.578 26 580 12.581 23 581 12.584 18 582 12.587 23 583 12.590 23 584 12.593 21 585 12.597 20 586 12.600 22 587 12.603 23 588 12.606 25 589 12.609 21 590 12.612 23 591 12.616 21 592 12.619 18 593 12.622 20 594 12.625 25 595 12.628 23 596 12.631 24 597 12.635 23 598 12.638 28 599 12.641 27 601 12.644 23 602 12.647 18 603 12.650 20 604 12.653 22 605 12.657 24 606 12.660 24 607 12.663 20 608 12.666 21 609 12.669 24 610 12.672 21 611 12.675 22 612 12.679 22 613 12.682 26 614 12.685 27 615 12.688 28 616 12.691 25 617 12.694 25 618 12.697 27 619 12.701 25 620 12.704 24 621 12.707 24 622 12.710 24 623 12.713 23 624 12.716 27 625 12.719 25 626 12.723 25 627 12.726 22 628 12.729 22 629 12.732 21 630 12.735 23 631 12.738 25 632 12.741 24 633 12.745 27 634 12.748 27 635 12.751 26 636 12.754 25 637 12.757 23 638 12.760 23 639 12.763 25 640 12.766 22 641 12.770 20 642 12.773 21 643 12.776 23 644 12.779 23 645 12.782 25 646 12.785 22 647 12.788 24 648 12.792 20 649 12.795 23 650 12.798 25 651 12.801 31 652 12.804 25 653 12.807 26 654 12.810 24 655 12.814 26 656 12.817 24 657 12.820 21 658 12.823 20 659 12.826 18 660 12.829 18 661 12.832 17 662 12.836 19 663 12.839 18 664 12.842 17 665 12.845 18 666 12.848 19 667 12.851 19 668 12.854 23 669 12.858 19 670 12.861 20 671 12.864 23 672 12.867 20 673 12.870 19 674 12.873 21 675 12.876 21 676 12.880 26 677 12.883 25 678 12.886 22 679 12.889 23 680 12.892 24 681 12.895 26 682 12.898 20