# Ranu Lamongan, East Java, Indonesia 800 Year Drought Index #----------------------------------------------------------------------- # 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 original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22409 # Description: NOAA Landing Page # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/lamongan2006di.txt # Description: NOAA location of the template # # # Archive: Paleolimnology # # Dataset DOI: # # Parameter_Keywords: geochemistry, reconstruction #--------------------------------------- # Contribution_Date # Date: 2017-07-10 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-07-10 #--------------------------------------- # Title # Study_Name: Ranu Lamongan, East Java, Indonesia 800 Year Drought Index #--------------------------------------- # Investigators # Investigators: Crausbay, S.D.; Russell, J.M.; Schnurrenberger, D.W. #--------------------------------------- # Description_Notes_and_Keywords # Description: Drought Index for the past millennium from sub-annually laminated lake sediment in lowland East Java, Indonesia. # Value of 0.5 = semi-quantitative value denoting calcite presence, however low abundance or presence in thin laminae precluded measurement of mol% MgCO3. # Value of 12 = semi-quantitative value denoting aragonite presence based on empirical results from Müller et al. 1972; when aragonite and calcite were both present, # the value of 12 representing aragonite was used. Other values are measurements of mol% MgCO3; see Crausbay et al. 2006 for complete discussion. # Age models based on 14-C vs U-series may yield different results. See Rodysill et al. 2013 for complete discussion. # Data are presented as depth from sediment surface, with slump removed. See Crausbay et al. 2006 for complete discussion. # Provided Keywords: calcium carbonate, ENSO, Indo-Pacific, laminations, Ranu Lamongan, stable isotopes, el-nino/southern-oscillation, carbon-isotope fractionation, southern-oscillation, rainfall variability, tropical pacific, indian, monsoon, climate, nino, enso, temperature #--------------------------------------- # Publication # Authors: Crausbay, Shelly D.; Russell, James M.; Schnurrenberger, Douglas W. # Published_Date_or_Year: 2006-04-01 # Published_Title: A ca. 800-year lithologic record of drought from sub-annually laminated lake sediment, East Java # Journal_Name: Journal of Paleolimnology # Volume: 35 # Edition: # Issue: 3 # Pages: 641-659 # Report Number: # DOI: 10.1007/s10933-005-4440-7 # Online_Resource: http://dx.doi.org/10.1007/s10933-005-4440-7 # Full_Citation: # Abstract: Lithostratigraphic analyses of a sub-annually laminated core from Ranu Lamongan, a maar lake on the island of Java, document considerable changes in the lake's chemistry and water balance over the past ca. 800 calendar years. Composition of the dark (clastics) and light (diatoms and/or calcium carbonate minerals) couplets suggests that these laminations form in response to seasonal changes in rainfall and water-column overturn in the lake. Calcium carbonate is not continuous in the core, and when it occurs it varies, sometimes abruptly, in carbonate phase and elemental composition (low Mg-calcite Mg-calcite, and aragonite). A significant correlation between Mg/Ca changes and d18O variations in authigenic calcium carbonate suggest the basin is highly sensitive to hydrologic variation. Lithologic data suggest calcium carbonate precipitates and thus records hydrologic conditions during the dry season - a season in which rainfall anomalies are highly correlated with the phase of ENSO. Our carbonate-based record of Mg/Ca shows variability in evaporative concentration on a quasi-seasonal frequency for the past ca. 800 years. Our record shows two multi-decadal periods of drought - ca. 1275-1325 and ca. 1450-1650 CE - the latter of which was especially strong and/or prolonged. Our record also shows a possible change in drought frequency at around 1650 CE, in which periods of calcium carbonate precipitation and Mg/Ca change shifted from multi-decadal to interannual variability. Given the strong correlations between modern-day drought in East Java and ENSO variability, our drought record may indicate a regime shift in the behavior of the ENSO system about 350 years ago. Finally, comparisons between our record and others suggest that variation in ENSO on centennial and sub-centennial scales is not strongly associated with changes in the global mean climate state. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: RTG: Paleorecords of Global Change #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Dayton Wilkie Natural History Fund # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: University of Minnesota # Grant: #--------------------------------------- # Site_Information # Site_Name: Ranu Lamongan # Location: Ocean>Indian Ocean>Indonesia # Country: Indonesia # Northernmost_Latitude: -7.9833 # Southernmost_Latitude: -7.9833 # Easternmost_Longitude: 113.3833 # Westernmost_Longitude: 113.3833 # Elevation: 240 m #------------------ # Data_Collection # Collection_Name: Lamongan2009DI # First_Year: 870 # Last_Year: 60 # Time_Unit: 14C yr BP # Core_Length: 9.82m # Notes: collect 1998CE #--------------------------------------- # Chronology_Information # Chronology: # # Lab ID AA37286 Beta 188882 AA37287 Beta 188883 Beta 188884 AA37288 AA37289 AA37290 Beta 188886 Beta 126066 # Dated material leaves leaves leaves & wood leaves leaves leaves wood leaves wood wood # depth_bot (cm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # depth_top (cm) 180.5 247 317 339 382 531 615.2 796 851 981 # age (bp) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # age14C (bp) 263 230 397 240 240 260 382 414 510 810 # age_error (years) 35 40 41 40 40 30 36 33 40 60 # calibrated age (cal BP) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # 2-sigma error of cal age (years) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # cal_age_range_old (bp) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # cal_age_range_young (2_s) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # depth (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # thickness (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # notes weight=5mg; Excluded from age model weight=9.67mg weight=8.7mg; excluded from age model weight=6.12mg; excluded from age model weight=8.7mg weight=5.8mg weight=30.9mg weight=9.64mg weight=30.6mg unknown # # # U-Th Dating # # Depth from sediment surface (cm) Sample Number 238U (ppm) ± 232Th (ppb) ± 230Th/232Th (atomic x10-6) ± d234U (measured) ± 230Th/238U (activity) ± 230Th Age (years) (uncorrected) ± 230Th Age (years) (corrected) ± d234Uinitial (corrected) ± 230Th Age (max age) (uncorrected) 230Th Age (min age) (uncorrected) 230Th Age (max age) (corrected) 230Th Age (min age) (corrected) # 561.5 (A) 6.66 0.03 1.516516517 0.2 27.9 1.8 49.1 1.9 0.00256 0.00015 266 16 224 26 49.1 1.9 1.1875 282 250 250 198 # 561.5 (C) 8.5 0.2 13.6 1.2 24.3 5.5 46.1 3.2 0.00241 0.0005 252 53 207 57 46.1 3.2 1.217391304 305 199 264 150 # 564 (A) 3.67 0.06 12.6 2.3 5.7 0.6 45.9 3.9 0.0119 0.0012 1240 130 280 500 46 3.9 4.428571429 1370 1110 780 -220 # 567 (A) 5.3 0.1 41.8 1.7 8.9 2 52.3 3.6 0.0427 0.00095 440 100 226 150 52.3 3.6 1.946902655 540 340 376 76 # 567 (C) 4.21 0.04 21.6 0.4 13.8 1.4 45.3 2.7 0.00429 0.00044 449 46 306 85 45.3 2.7 1.467320261 495 403 391 221 # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_cm depth, , , cm, , , Depth from surface sediment, ,N, ## DI Drought index,calcite, ,mol% MgCO3,~1cm light laminations - Dry season; ~1-10cm dark laminations - Wet season; ~10-60cm massive bed - mixed? (dry - Austral winter), paleolimnology,see "Notes",X-ray defraction,N, #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: depth-cm DI 1.2 0.5 7.6 0.5 9.1 0.5 19.4 6.33992 19.8 0.5 22 0.5 24.8 4.5752 26.8 0.5 38.9 0.5 39.9 3.4314 41.7 0 43.2 0.5 50 0.5 50.3 1.7974 50.8 0.5 51.7 4.05232 52 3.268 53 5.58828 54.1 4.11768 54.6 3.46408 55 0.5 57.4 0.5 63.6 0.5 66.5 0.5 73 0.5 75.7 0.5 76.2 0.5 77.6 3.69284 81.5 0.5 81.7 3.36604 82.1 0.5 82.3 5.00004 82.5 3.16996 82.7 3.23532 82.9 4.5752 83.5 0.5 83.9 2.58172 84.1 0.5 84.3 0.5 84.7 4.37912 85.1 4.70592 85.5 0.5 86.9 4.80396 88.2 4.83664 90.1 3.49676 92.2 3.49676 92.7 1.43792 93 3.00656 95.2 8.987 101.2 4.44448 108.5 0.5 108.7 0.5 108.9 0.5 109.7 1.89544 115 3.4314 115.4 0.5 115.7 0.5 116 6.0458 116.5 8.4968 127.7 3.39872 136.3 0.5 137.8 4.77128 138 0.5 140.2 0.5 140.8 0.5 142.1 0.5 142.3 0.5 144.3 0.5 146.2 0.5 146.4 0.5 146.6 1.634 155.1 0.5 155.5 0.5 156.2 0.5 157.3 0.5 160.6 0.5 163.3 0.5 168.9 9.70596 169.7 0.5 176 0.5 197.9 5.0654 198.2 3.95428 204.7 0.5 206 0.5 210.5 5.13076 210.7 0.5 221.1 0.91504 221.4 0.5 221.6 3.88892 223 0.5 223.2 0.5 224.4 4.50984 225.7 1.73204 226.1 0.5 226.3 0.5 226.5 0.5 226.7 0.5 228.1 0.5 228.6 4.37912 229.5 5.35952 231.9 0.5 235 5.0654 246.6 1.92812 248 3.79088 258.7 7.64712 265.4 12 267.5 12 270.9 0.5 274.6 12 275.1 12 275.8 12 277.6 3.1046 278.5 12 279.3 12 279.9 12 284.3 0.5 285.4 4.50984 314.3 5.58828 358.5 0.5 360.5 0.5 402.5 0.5 405.6 3.33336 447.8 0.5 448.8 0.5 452.4 7.0262 457.5 0.5 459 0.5 459.8 0.5 460 6.76476 460.3 0.5 461.8 0.5 462.9 0.5 463.4 0.5 464 9.70596 464.7 3.23532 465.3 0.5 467.6 0.5 468 0.5 468.3 0.5 468.8 5.52292 473.5 0.5 475.9 3.07192 476.7 0.5 477.5 3.9216 478.7 3.62748 480 3.79088 480.5 0.5 481.6 3.268 482.4 12 482.9 12 483.3 3.49676 483.6 3.46408 484.5 0.5 486.3 0.5 486.8 0.5 489.1 0.5 489.3 3.30068 491.4 6.40528 493.1 12 493.6 6.8628 493.7 12 495.5 12 496.5 12 496.8 12 497.1 12 498.5 12 499.2 12 499.6 12 499.9 12 500 12 500.1 12 500.2 12 500.4 12 501.3 12 503 12 503.2 12 557.5 12 558.1 12 558.6 12 558.9 12 559.2 12 562.9 12 563.5 12 564.8 12 565 12 565.2 12 565.8 12 565.9 12 567.1 12 567.4 12 567.6 12 567.9 12 569.5 3.30068 572.4 12 573 2.1242 573.9 2.90852 590.5 3.1046 592.5 0.62092 592.9 2.67976 593.4 3.1046 594.5 12 595.7 12 596.9 0.5 597.5 7.33666 602.5 12 656 0.5 658 0.5 659 0.5 659.2 0.5 659.3 0.5 659.8 0.5 660.3 0.5 660.8 0.5 661 0.5 661.3 0.5 663.3 0.5 664 0.5 670.7 0.5 672.5 0.5 673.8 0.5 677.1 1.56864 677.5 0.5 678.7 0.5 679.1 0.5 679.3 0.817 679.6 2.25492 680.1 3.66016 681 2.58172 681.3 2.64708 682.7 0.5 684.2 5.03272 684.9 0.5 774.8 4.54252 775.3 0.5 781.7 0.5 782.8 0.5 783.7 0.5 783.9 0.5 785 0.5 787.8 0.5 799.9 0.5 800.1 0.5 800.7 2.6144 801.3 0.5 801.6 3.00656 801.7 0.5 802.7 2.90852 803.1 0.5 803.8 0.5 804.2 0.5 805.7 5.58828 806.1 3.13728 806.7 2.451 807.6 0.5 807.8 0.5 808.3 0.5 809.4 0.5 809.9 0.5 810.6 0.5 811.1 0.5 811.9 3.69284 812.2 0.5 812.8 3.13728 813.2 0.5 813.5 0.5 814.8 0.5 815 3.79088 815.1 3.20264 815.2 0.5