# Fort Stanton Cave, New Mexico Terminal Pleistocene Stalagmite Isotope Data
#----------------------------------------------------------------------- 
#                World Data Center for Paleoclimatology, Boulder 
#                                  and 
#                     NOAA Paleoclimatology Program 
#----------------------------------------------------------------------- 
# 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: http://www.hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:14748
#
# Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/speleothem/newmexico/fort-stanton2012.txt
# 
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Speleothems
#--------------------
# Contribution_Date
#	Date: 2013-07-26
#--------------------
# Title
#	Study_Name: Fort Stanton Cave, New Mexico Terminal Pleistocene Stalagmite Isotope Data 
#--------------------
# Investigators
#       Investigators: Polyak, V.J.; Asmerom, Y.; Burns, S.J.; Lachniet, M.S.
#--------------------
# Description_and_Notes
#	Description: Isotope data from stalagmite FS-2, Fort Stanton Cave, New Mexico USA. 
#       This dataset includes high-resolution d234U, d13C, and d18O.  These data offer the climatic 
#       backdrop of southwestern North America during the terminal Pleistocene mammal extinction period.
#--------------------
# Publication 
#       Authors: Victor J. Polyak, Yemane Asmerom, Stephen J. Burns and Matthew S. Lachniet
#       Published_Date_or_Year: 2012-09-04     
#       Published_Title: Climatic backdrop to the terminal Pleistocene extinction of North American mammals
#       Journal_Name: Geology
#       Volume: 40
#       Edition: 
#       Issue: 11
#       Pages: 1023-1026
#       DOI: 10.1130/G33226.1
#       Online_Resource: http://geology.gsapubs.org/content/40/11/1023.abstract
#       Full_Citation: 
#       Abstract: North American terminal Pleistocene mammal extinctions are the subject of a long-running scientific debate. Although the role of climate has figured centrally, we lack clear knowledge of the timing and nature of terminal Pleistocene climate variability. Herein we document lengthy terminal Pleistocene drought in the southwestern United States (USA) using d13C and d234U effective moisture proxy data in speleothem calcite (stalagmite FS2) from Fort Stanton Cave, New Mexico, supplemented with age data from pool basin shelfstone speleothems from the Big Room in Carlsbad Cavern. This terminal Pleistocene drought, defined by a sharp rise in both d13C and d234U values, began just before 14.5 k.y. ago and lasted at least until 12.9 k.y. ago, when it was briefly and only mildly interrupted by the Younger Dryas. The timing and length of this drought (~1500 yr) match the Northern Hemisphere Bølling-Allerød oscillation preserved in Greenland ice cores and exhibited in the d18O record of stalagmite FS2. Rapid transition from cool moist Late Glacial to warm dry Holocene-like climatic conditions was likely unfavorable to many species of Pleistocene mammals in the southwestern USA. A climate-induced extinction implies that this last glacial cycle and its termination were more extreme than previous glacial cycles and/or glacial terminations.
#------------------
# Publication 
#       Authors: Yemane Asmerom, Victor J. Polyak, and Stephen J. Burns
#       Published_Date_or_Year: 2010-01-24     
#       Published_Title: Variable winter moisture in the southwestern United States linked to rapid glacial climate shifts
#       Journal_Name: Nature Geoscience
#       Volume: 3
#       Edition: 
#       Issue: 
#       Pages: 114-117
#       DOI: 10.1038/ngeo754
#       Online_Resource: http://www.nature.com/ngeo/journal/v3/n2/full/ngeo754.html
#       Full_Citation: 
#       Abstract: During the last glacial period, the climate of the Northern Hemisphere was characterized by rapid, large-amplitude temperature fluctuations through cycles lasting a few thousand years. These fluctuations are apparent in Greenland temperature reconstructions, and corresponding temperature and hydrological variations have been documented throughout the Northern Hemisphere. Here we present a record of precipitation in the southwestern United States from 56,000 to 11,000 yr ago, on the basis of d18O measurements of speleothem calcite from New Mexico. Our record shows that increased winter precipitation in the southwestern United States is associated with Northern Hemisphere cooling, which we attribute to a southward shift in the polar jet stream, which modulated the position of the winter storm track over North America. On the western side of the Pacific Ocean basin, decreases in summer monsoon precipitation are associated with Northern Hemisphere cooling, due to southward displacement of the intertropical convergence zone. We conclude that cooling and warming excursions in the Northern Hemisphere lead to concurrent latitudinal displacement of both the intertropical convergence zone and the polar jet stream over the Pacific Ocean. Our data are consistent with modern evidence for a northward shift of the polar jet stream in response to global warming, which could lead to increasingly arid conditions in southwestern North America in the future.
#------------------
# Funding_Agency 
#       Funding_Agency_Name: US National Science Foundation
#       Grant: ATM-0214333, ATM-0703353, EAR-0326902
#------------------
# Site_Information 
#       Site_Name: Fort Stanton Cave
#       Location: North America>United States Of America>New Mexico
#	Country: USA
#	Northernmost_Latitude: 33.5067
# 	Southernmost_Latitude: 33.5067
# 	Easternmost_Longitude: -105.4433 
# 	Westernmost_Longitude: -105.4433
# 	Elevation: 1864 m  
#------------------
# Data_Collection   
#	Collection_Name: FS-2-2012
#	Earliest_Year: 26000
#	Most_Recent_Year: 11400
#	Time_Unit: CalYrBP
#	Core_Length: m
#	Notes: 
#------------------
# Chronology: 
# 
#
# This time-series ties all distances to the same age formulas reported for the stable isotopes in Polyak et al. 2012			
# Z = depth below stalagmite FS-2 top in mm
# 			
# d234Uinitial times-series for stalagmite FS-2
# 	calculated		
# Z (mm)	age	d234Uinitial	2-S abs error
# 0.5	11756	673	± 2
# 0.8	12003	651	± 2
# 1.4	12440	640	± 4
# 1.5	12506	639	± 4
# 2.3	12970	573	± 3
# 2.5	13069	562	± 3
# 3	13293	553	± 2
# 3.3	13411	568	± 1
# 3.5	13483	545	± 2
# 4.2	13700	540	± 1
# 4.5	13778	531	± 7
# 4.75	13837	542	± 2
# 5	13891	548	± 2
# 6.9	14167	519	± 3
# 7	14177	515	± 2
# 8	14259	522	± 4
# 8.8	14312	542	± 2
# 9.5	14355	510	± 4
# 9.5	14356	522	±  2
# 10.3	14407	514	± 2
# 10.6	14428	517	± 1
# 10.9	14452	506	±  2
# 11	14458	508	± 2
# 12.4	14587	524	± 1
# 12.5	14598	529	± 1
# 12.6	14607	520	±  2
# 14	14799	521	± 2
# 14.2	14826	532	±  2
# 14.6	14899	550	± 2
# 15.5	15071	535	± 2
# 15.9	15161	532	±  2
# 16.3	15246	549	± 1
# 17	15417	550	± 2
# 17.5	15549	552	± 1
# 18	15689	557	± 2
# 18.5	15836	554	± 1
# 19	15990	557	± 2
# 19.9	16286	585	± 1
# 20.2	16389	556	±  2
# 20.5	16494	595	± 2
# 21.5	16860	588	± 1
# 22.2	17129	603	± 2
# 22.7	17327	567	± 1
# 23	17541	570	± 2
# 23.5	17871	557	± 2
# 24	18062	544	± 2
# 24.3	18153	539	± 1
# 24.5	18214	540	±  1
# 25	18387	530	± 2
# 26.3	19079	539	± 1
# 26.5	19214	539	± 2
# 27.3	19784	547	± 1
# 28.2	20396	544	±  4
# 28.5	20575	547	± 3
# 30.5	21337	532	± 1
# 32.0	21809	525	±  1
# 32.3	21969	519	± 1
# 33.2	22693	503	± 1
# 34.2	23988	536	± 1
# 35.5	26056	539	± 1
# 35.8	26438	558	±  3
# 
# 
# 																	
# 																	
# All d234Uinitial values from Polyak et al. 2012 and Asmerom et al. 2012
# 
# sub-sample	Z (mm)	d234Uinitial	2-S abs error		note	
# FS-1	0.8	651	± 2		from Asmerom et al. 2010 U-series data	
# FS-10	1.4	640	± 4		from Asmerom et al. 2010 U-series data	
# FS-11	2.3	573	± 3		from Asmerom et al. 2010 U-series data	
# FS-12	3.3	568	± 1		from Asmerom et al. 2010 U-series data	
# FS-13	4.2	540	± 1		from Asmerom et al. 2010 U-series data	
# FS-14	5	548	± 2		from Asmerom et al. 2010 U-series data	
# FS-15	6.9	519	± 3		from Asmerom et al. 2010 U-series data	
# FS-16	8	522	± 4		from Asmerom et al. 2010 U-series data	
# FS-17	8.8	542	± 2		from Asmerom et al. 2010 U-series data	
# FS-18	10.3	514	± 2		from Asmerom et al. 2010 U-series data	
# FS-19	10.6	517	± 1		from Asmerom et al. 2010 U-series data	
# FS-2	12.4	524	± 1		from Asmerom et al. 2010 U-series data	
# FS-20	14.6	550	± 2		from Asmerom et al. 2010 U-series data	
# FS-21	16.3	549	± 1		from Asmerom et al. 2010 U-series data	
# FS-22	17.5	552	± 1		from Asmerom et al. 2010 U-series data	
# FS-23	18.5	554	± 1		from Asmerom et al. 2010 U-series data	
# FS-24	19.9	585	± 1		from Asmerom et al. 2010 U-series data	
# FS-25	22.2	603	± 2		from Asmerom et al. 2010 U-series data	
# FS-26	22.7	567	± 1		from Asmerom et al. 2010 U-series data	
# FS-27	24.3	539	± 1		from Asmerom et al. 2010 U-series data	
# FS-28	26.3	539	± 1		from Asmerom et al. 2010 U-series data	
# FS-29	27.3	547	± 1		from Asmerom et al. 2010 U-series data	
# FS-3	28.5	547	± 3		from Asmerom et al. 2010 U-series data	
# FS-30	30.5	532	± 1		from Asmerom et al. 2010 U-series data	
# FS-31	32.3	519	± 1		from Asmerom et al. 2010 U-series data	
# FS-32	33.2	503	± 1		from Asmerom et al. 2010 U-series data	
# FS-33	34.2	536	± 1		from Asmerom et al. 2010 U-series data	
# FS-34	35.5	539	± 1		from Asmerom et al. 2010 U-series data	
# 						
# FS2-0.5	0.5	673	± 2		from unspiked powder Polyak et al. 2012	
# FS2-1.5	1.5	639	± 4		from unspiked powder Polyak et al. 2012	
# FS2-2.5	2.5	562	± 3		from unspiked powder Polyak et al. 2012	
# FS2-3	3	553	± 2		from unspiked powder Polyak et al. 2012	
# FS2-3.5	3.5	545	± 2		from unspiked powder Polyak et al. 2012	
# FS2-4.5	4.5	531	± 7		from unspiked powder Polyak et al. 2012	
# FS2-5	4.75	542	± 2		from unspiked powder Polyak et al. 2012	
# FS2-7	7	515	± 2		from unspiked powder Polyak et al. 2012	
# FS2-9.5	9.5	510	± 4		from unspiked powder Polyak et al. 2012	
# FS2-11	11	508	± 2		from unspiked powder Polyak et al. 2012	
# FS2-12.5	12.5	529	± 1		from unspiked powder Polyak et al. 2012	
# FS2-14	14	521	± 2		from unspiked powder Polyak et al. 2012	
# FS2-15.5	15.5	535	± 2		from unspiked powder Polyak et al. 2012	
# FS2-17	17	550	± 2		from unspiked powder Polyak et al. 2012	
# FS2-18	18	557	± 2		from unspiked powder Polyak et al. 2012	
# FS2-19	19	557	± 2		from unspiked powder Polyak et al. 2012	
# FS2-20.5	20.5	595	± 2		from unspiked powder Polyak et al. 2012	
# FS2-21.5	21.5	588	± 1		from unspiked powder Polyak et al. 2012	
# FS2-23	23	570	± 2		from unspiked powder Polyak et al. 2012	
# FS2-23.5	23.5	557	± 2		from unspiked powder Polyak et al. 2012	
# FS2-24	24	544	± 2		from unspiked powder Polyak et al. 2012	
# FS2-25	25	530	± 2		from unspiked powder Polyak et al. 2012	
# FS2-26.5	26.5	539	± 2		from unspiked powder Polyak et al. 2012	
# 						
# FS2-9_3mm	9.5	522	±  2		from new U-series data Polyak et al. 2012
# FS2-10_7mm	10.9	506	±  2		from new U-series data Polyak et al. 2012
# FS2-12_4mm	12.6	520	±  2		from new U-series data Polyak et al. 2012
# FS2-14_2mm	14.2	532	±  2		from new U-series data Polyak et al. 2012
# FS2-16_0mm	15.9	532	±  2		from new U-series data Polyak et al. 2012
# FS2-19_7mm	20.2	556	±  2		from new U-series data Polyak et al. 2012
# FS2-24_2mm	24.5	540	±  1		from new U-series data Polyak et al. 2012
# FS2-27_8mm	28.2	544	±  4		from new U-series data Polyak et al. 2012
# FS2-31_8mm	32.0	525	±  1		from new U-series data Polyak et al. 2012
# FS2-35_3mm	35.8	558	±  3		from new U-series data Polyak et al. 2012
# 
# 
# 
# From Table DR4.  Ten additional uranium-series dates for stalagmite FS-2, Fort Stanton Cave. 
# 
# 	  Z (mm)	238U (ppb)	2-S abs error	232Th (ppt)	2-S abs error	230Th/232Th	2-S abs error	230Th/238U	2-S abs error	d234Umeas	2-S abs error	d234Uinitial	2-S abs error	age (yrs BP)	2-S abs error	age (yrs BP)	2-S abs error
# FS2-9_3mm	9.5	929	±  2	58	±  95	9017	±  14682	0.1843	± 0.0010	502	±  2	522	±  2	14151	±  83	14149	±  83
# FS2-10_7mm	10.9	901	±  2	58	±  91	8899	±  13943	0.1877	± 0.0017	485	±  2	506	±  2	14603	±  143	14600	±  143
# FS2-12_4mm	12.6	927	±  2	27	±  87	19818	±  62585	0.1920	± 0.0022	499	±  2	520	±  2	14815	±  185	14813	±  185
# FS2-14_2mm	14.2	861	±  2	22	±  108	23392	±  115396	0.1940	± 0.0010	510	±  2	532	±  2	14853	±  81	14852	±  81
# FS2-16_0mm	15.9	1026	±  3	37	±  90	16767	±  40958	0.1965	± 0.0009	510	±  2	532	±  2	15058	±  74	15057	±  74
# FS2-19_7mm	20.2	1039	±  3	27	±  52	25314	±  48974	0.2125	± 0.0010	531	±  2	556	±  2	16122	±  81	16121	±  81
# FS2-24_2mm	24.5	1010	±  3	513	±  49	1384	±  133	0.2300	± 0.0009	514	±  1	540	±  1	17779	±  77	17760	±  78
# FS2-27_8mm	28.2	1025	±  3	686	±  60	1160	±  101	0.2540	± 0.0014	515	±  4	544	±  4	19773	±  129	19748	±  130
# FS2-31_8mm	32.0	1101	±  3	41	±  62	22534	±  34299	0.2748	± 0.0011	494	±  1	525	±  1	21878	±  96	21877	±  96
# FS2-35_3mm	35.8	1058	±  3	76	±  66	13651	±  11854	0.3208	± 0.0014	520	±  3	558	±  3	25459	±  132	25457	±  132
# 
# Z = depth below stalagmite FS-2 top in mm
# 
# "Corrected ages use a calculated initial 230Th/232Th atomic ratio =  8.8 ppm ±50%.  Years before present = yr B.P., where present is AD 2010.  "
# All errors are absolute 2S.  Subsample sizes ranged from 40 to 100 mg.  Dist. = distance in mm from stalagmite top. 				
# "Due to age anomalies from physical distance measurements and larger drill-hole sizes, 10 additional subsample powders were drilled and analyzed producing 10 new U-series dates (Table DR4 of Polyak et al. 2012). "	
# "Five of these drilled in the stalagmite area representing 14 to 15 ka supplement four previously published dates (Asmerom et al., 2010) in that area "	
# to more accurately establish the d18O excursion interpreted to be the initiation of the Bølling oscillation in GICC05. 	
# Five additional new U-series dates lie on the originally published growth curve between 25 and 16 kyr BP. 
#  A new polynomial curve was generated for the growth history from all but three data points shown as empty red circles (Figure DR3 of Polyak et al. 2012). 
# 
# 
# 
# New d234U data from Table DR3.  d234U values for stalagmite FS-2 from 20 to 11.5 kyr B.P..
# 
# Sub-	Dist	234U/238U				calculated	
# sample	(mm)	(activity)	2-S abs error	d234Umeas	2-S abs error	d234Uinitial	2-S abs error
# 
# FS2-0.5	0.5	0.01249	±  0.047	651	±  2	673	±  2
# FS2-1.5	1.5	0.01223	±  0.117	616	±  4	639	±  4
# FS2-2.5	2.5	0.01166	±  0.090	541	±  3	562	±  3
# FS2-3	3	0.01160	±  0.058	532	±  2	553	±  2
# FS2-3.5	3.5	0.01154	±  0.079	525	±  2	545	±  2
# FS2-4.5	4.5	0.01144	±  0.075	511	±  2	531	±  2
# FS2-5	5	0.01151	±  0.229	521	±  7	542	±  7
# FS2-7	7	0.01131	±  0.076	495	±  2	515	±  2
# FS2-9.5	9.5	0.01127	±  0.118	490	±  4	510	±  4
# FS2-11	11	0.01126	±  0.060	488	±  2	508	±  2
# FS2-12.5	12.5	0.01140	±  0.072	507	±  2	529	±  2
# FS2-14	14	0.01135	±  0.046	499	±  1	521	±  1
# FS2-15.5	15.5	0.01145	±  0.078	513	±  2	535	±  2
# FS2-17	17	0.01155	±  0.077	526	±  2	550	±  2
# FS2-18	18	0.01160	±  0.056	532	±  2	557	±  2
# FS2-19	19	0.01160	±  0.061	533	±  2	557	±  2
# FS2-20.5	20.5	0.01187	±  0.058	568	±  2	595	±  2
# FS2-21.5	21.5	0.01181	±  0.044	561	±  1	588	±  1
# FS2-23	23	0.01167	±  0.053	542	±  2	570	±  2
# FS2-23.5	23.5	0.01157	±  0.056	529	±  2	557	±  2
# FS2-24	24	0.01148	±  0.080	517	±  2	544	±  2
# FS2-25	25	0.01138	±  0.065	503	±  2	530	±  2
# FS2-26.5	26.5	0.01143	±  0.055	511	±  2	539	±  2
# 
# d234U values along a growth layer transect 6.5 mm from the stalagmite top
# FS2-7.0 L2	6.5	0.01138	±  0.078	503	±  2	524	±  2
# FS2-7.0 L1	6.5	0.01141	±  0.081	508	±  2	528	±  2
# FS2-7.0 C	6.5	0.01136	±  0.065	501	±  2	521	±  2
# FS2-7.0R1	6.5	0.01134	±  0.079	499	±  2	519	±  2
# FS2-7.0 R2	6.5	0.01139	±  0.084	504	±  3	525	±  3
# 
# 
# d234U data added to data from the age data transect offered in Asmerom et al.(2010).  
# Each subsample weight varied from 2-6 mg.  Dist = distance from stalagmite top that 
# sample was taken.  Errors on measured 234U/238U activity and d234U measured are percent 1S, 
# and absolute 2S, respectively.   Last five values were sampled along a single growth layer 
# to test variation in values related to horizontal distance from stalagmite vertical center. 
# The set of d234U values in Table DR3 of Polyak et al. 2012, independent of those values 
# previously reported (Asmerom et al., 2010) were derived from significantly smaller 
# powders (2-6 mg) that were dissolved in 7N HNO3, unspiked, and put through anion resin 
# to separate the U fraction.  The U isotopes were measured on the Thermo Neptune multicollector ICPMS.  
# The final 234U/235U measured values were age-corrected to obtain initial 234U/235U values using 
# the age/depth equation in Fig. DR3 of Polyak et al. 2012.  Comparison to values measured during 
# U-series age determinations are shown in Fig. DR3 of Polyak et al. 2012.  Conversions from 14C 
# to calendar ages are from the radiocarbon age to calendar age conversion database (Fairbanks et al., 2005). 
# 
# 
# 
# Uranium-series data for shelfstone samples collected from pool basins in the Big Room of Carlsbad Cavern
# 													uncorrected		corrected	
# sub-sample	238U (ppb)	2-S abs error	232Th (ppt)	2-S abs error	230Th/232Th	2-S abs error	230Th/238U	2-S abs error	d234Umeas	2-S abs error	d234Uinitial	2-S abs error	age (yrs BP)	2-S abs error	age (yrs BP)	2-S abs error
# 1-BR-1-1	267.8	± 1.4	1180	± 53	1496	± 72	0.399	± 0.007	1230	± 12	1305	± 13	21154	± 445	20779	± 481
# 1-BR-1-2	327.8	± 1.6	9334	± 34	37	± 0.3	0.348	± 0.003	1220	± 9	1282	± 10	18353	± 174	17735	± 352
# 																
# 2-BR-4-1	713.7	± 6.2	2116	± 27	965	± 24	0.173	± 0.004	325	± 9	339	± 10	15211	± 393	14917	± 417
# 2-BR-4-1(2)	717.6	± 7.6	2132	± 34	981	± 53	0.177	± 0.009	321	± 10	335	± 11	15580	± 897	15286	± 906
# 													weighted-average =		14982	± 380
# 																
# 2-BR-4-tip	614.2	± 3.3	1130	± 45	1511	± 65	0.168	± 0.003	344	± 6	358	± 7	14535	± 259	14262	± 292
# 2-BR-4-tip icp	612.2	± 1.3	1179	± 45	1440	± 55	0.168	± 0.001	361	± 14	376	± 15	14302	± 175	14028	± 220
# 													weighted-average =		14113	± 180
# 																
# 2-BR-4-mid	703.1	± 3.3	1197	± 47	1685	± 74	0.174	± 0.004	337	± 5	351	± 5	15128	± 344	14884	± 364
# 																
# 2-BR-4-int	728.7	± 4.1	2248	± 34	942	± 19	0.176	± 0.003	325	± 6	339	± 6	15478	± 264	15184	± 301
# 2-BR-4-int icp	726.1	± 2.6	2445	± 34	881	± 13	0.180	± 0.001	323	± 2	337	± 2	15845	± 126	15542	± 197
# 2-BR-4-int icp2	728.6	± 1.7	2570	± 33	841	± 11	0.180	± 0.001	322	± 1	337	± 1	15850	± 72	15542	± 170
# 													weighted-average =		15487	± 120
# 																
# 2-BR-4-bot	615.8	± 3.5	367	± 66	4809	± 875	0.173	± 0.004	344	± 9	358	± 10	15005	± 406	14817	± 417
# 2-BR-4-bot icp	615.1	± 2.8	403	± 66	4358	± 716	0.173	± 0.001	332	± 3	346	± 3	15087	± 122	14892	± 159
# 2-BR-4-bot icp2	615.5	± 1.5	533	± 66	3244	± 403	0.170	± 0.001	332	± 1	346	± 1	14848	± 103	14634	± 151
# 													weighted-average =		14760	± 110
# 																
# 3-BR-7	277.1	± 2.1	3591	± 54	417	± 8	0.327	± 0.004	1011	± 13	1066	± 14	19117	± 297	18531	± 414
# 3-BR-8-bot	296.7	± 0.8	1445	± 54	261	± 10	0.415	± 0.002	1089	± 3	1163	± 3	23751	± 132	23365	± 234
# 3-BR-9-mid	355.4	± 1.0	4236	± 51	84	± 1	0.329	± 0.002	1012	± 3	1067	± 3	19234	± 106	18751	± 263
# 3-BR-10-top	475.4	± 1.3	46987	± 203	10	± 0.1	0.326	± 0.002	1002	± 2	1053	± 3	19133	± 113	17724	± 711
# 																
# 4-BR-8	310.2	± 0.8	433	± 41	399	± 38	0.000	± 0.000	532	± 2	552	± 2	13754	± 110	13410	± 206
# 4-BR-8-2	300.6	± 0.8	207	± 51	810	± 200	0.000	± 0.000	520	± 2	540	± 2	13890	± 124	13611	± 199
# 4-BR-8-3	318.0	± 0.8	2060	± 55	86	± 2	0.002	± 0.000	538	± 2	558	± 2	13201	± 299	13201	± 299
# 																
# 5-BR-16-1	262.1	± 1.1	1656	± 29	620	± 15	0.237	± 0.004	867	± 6	902	± 6	14679	± 282	14159	± 382
# 5-BR-16-1(2)	261.9	± 1.4	1708	± 30	598	± 15	0.236	± 0.004	886	± 12	922	± 12	14475	± 295	13955	± 391
# 													weighted-average =		14059	± 270
# 																
# 6-BR-17-1	499.0	± 1.7	7775	± 35	215	± 3	0.203	± 0.003	421	± 4	441	± 4	16697	± 255	16093	± 394
# 6-BR-17-1(2)2	499.6	± 2.5	7760	± 41	217	± 3	0.204	± 0.003	426	± 7	446	± 7	16738	± 243	16137	± 384
# 													weighted-average =		16115	± 270
# 																
# 6-BR-17-3	454.3	± 1.2	465	± 43	651	± 60	0.218	± 0.001	430	± 2	452	± 2	17929	± 111	17671	± 171
# 6-BR-17-4	460.2	± 1.3	1924	± 48	205	± 5	0.280	± 0.001	420	± 2	448	± 2	23768	± 137	23360	± 245
# 																
# 7-BR-18-1	693.7	± 4.2	7424	± 33	299	± 3	0.194	± 0.002	349	± 6	366	± 7	16841	± 206	16390	± 303
# 7-BR-18-1(2)	694.3	± 5.0	7542	± 41	295	± 5	0.194	± 0.004	348	± 8	365	± 8	16841	± 364	16387	± 426
# 													weighted-average =		16389	± 250
# 7-BR-18-bot	521.1	± 1.5	1919	± 52	173	± 5	0.209	± 0.001	357	± 2	375	± 2	18122	± 105	17743	± 216
# 7-BR-18-mid	523.6	± 1.4	3478	± 48	90	± 1	0.196	± 0.001	352	± 2	369	± 2	17001	± 96	16537	± 250
# 7-BR-18-top	494.2	± 1.3	7048	± 53	39	± 0.3	0.182	± 0.001	352	± 2	367	± 2	15720	± 89	15098	± 323
# 
# See Polyak et al. 2012 supplementary Table DR1 for more information
# 
#
# 	
#----------------	
# Variables 
#
# Data variables follow (have no #)
# 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) 
#
## depth_mm	depth, , , mm, , , , ,N
## age_calBP2010	age, , , calendar years before present 2010AD, , , , ,N
## d13CcarbVPDB	delta13C, calcium carbonate, , per mil VPDB, , , , ,N 
## d18OcarbVPDB	delta18O, calcium carbonate, , per mil VPDB, , , , ,N 
#
#----------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values:  NA
depth_mm	age_calBP	d13CcarbVPDB	d18OcarbVPDB
0.1	11396	-2.05	-6.28
0.2	11490	-1.79	-6.30
0.3	11581	-1.91	-6.39
0.4	11670	-2.06	-7.29
0.5	11757	-2.02	-7.91
0.6	11841	-1.77	-7.65
0.7	11923	-1.68	-8.00
0.8	12003	-1.63	-8.22
0.9	12081	-1.65	-8.29
1	12157	-1.63	-8.03
1.1	12231	-1.40	-7.31
1.2	12303	-1.94	-8.47
1.3	12372	-2.24	-8.53
1.4	12440	-2.36	-8.48
1.5	12506	-2.46	-8.74
1.6	12570	-2.55	-8.83
1.7	12633	-2.79	-8.33
1.8	12693	-3.06	-7.40
1.9	12752	-3.28	-6.89
2	12809	-3.48	-6.78
2.1	12864	-3.70	-6.55
2.2	12918	-3.98	-7.02
2.3	12970	-4.12	-7.20
2.4	13021	-4.26	-7.15
2.5	13070	-4.38	-6.89
2.6	13117	-4.54	-6.74
2.7	13163	-4.63	-6.41
2.8	13207	-4.72	-6.64
2.9	13251	-4.63	-6.49
3	13292	-4.63	-6.54
3.1	13333	-4.68	-6.39
3.2	13372	-4.69	-6.34
3.3	13409	-4.73	-6.39
3.4	13446	-4.84	-6.42
3.5	13481	-5.13	-6.54
3.6	13515	-5.29	-6.89
3.7	13548	-5.36	-6.78
3.8	13580	-5.35	-6.52
3.9	13610	-5.58	-6.44
4	13640	-5.55	-6.29
4.1	13669	-5.61	-6.25
4.2	13696	-5.63	-6.21
4.3	13723	-5.61	-6.16
4.4	13748	-5.71	-6.49
4.5	13773	-5.72	-6.22
4.6	13796	-5.88	-6.84
4.7	13819	-5.91	-6.72
4.8	13841	-5.93	-6.63
4.9	13862	-5.95	-6.67
5	13882	-6.06	-6.67
5.1	13902	-6.13	-6.70
5.2	13921	-6.21	-6.71
5.3	13939	-6.26	-6.72
5.4	13956	-6.27	-6.69
5.5	13973	-6.33	-6.68
5.6	13989	-6.40	-6.40
5.7	14004	-6.49	-6.31
5.8	14019	-6.52	-6.43
5.9	14033	-6.52	-6.39
6	14046	-6.52	-6.21
6.1	14059	-6.50	-6.18
6.2	14072	-6.18	-5.96
6.3	14084	-6.45	-6.05
6.4	14095	-6.50	-6.23
6.5	14106	-6.55	-6.22
6.6	14117	-6.57	-5.96
6.7	14127	-6.67	-6.13
6.8	14137	-6.70	-5.80
6.9	14146	-6.33	-5.77
7	14155	-6.69	-6.20
7.1	14164	-6.68	-6.23
7.2	14172	-6.64	-5.96
7.3	14180	-6.58	-5.88
7.4	14188	-6.52	-5.86
7.5	14196	-6.58	-5.96
7.6	14203	-6.55	-6.04
7.7	14210	-6.62	-6.25
7.8	14217	-6.63	-6.30
7.9	14224	-6.65	-6.29
8	14230	-6.75	-6.16
8.1	14236	-6.86	-6.13
8.2	14243	-6.94	-6.17
8.3	14249	-6.99	-6.22
8.4	14255	-6.87	-6.32
8.5	14260	-6.87	-6.40
8.6	14266	-6.85	-6.55
8.7	14272	-7.07	-6.81
8.8	14278	-7.09	-6.91
8.9	14283	-6.96	-7.06
9	14289	-6.87	-6.96
9.1	14294	-6.81	-6.83
9.2	14300	-6.75	-6.70
9.3	14305	-6.71	-6.43
9.4	14311	-6.72	-6.29
9.5	14317	-6.66	-6.13
9.6	14322	-6.76	-6.04
9.7	14328	-6.79	-6.15
9.8	14334	-6.79	-5.97
9.9	14340	-6.94	-5.89
10	14346	-7.02	-6.02
10.1	14352	-6.97	-6.14
10.2	14358	-6.90	-5.71
10.3	14365	-7.00	-5.82
10.4	14371	-7.04	-5.89
10.5	14378	-7.08	-5.68
10.6	14385	-7.06	-5.81
10.7	14392	-7.06	-5.81
10.8	14399	-7.05	-5.78
10.9	14406	-7.08	-5.79
11	14414	-7.00	-5.63
11.1	14422	-7.16	-5.61
11.2	14430	-7.14	-5.64
11.3	14438	-7.29	-5.94
11.4	14446	-7.38	-6.01
11.5	14455	-7.45	-6.51
11.6	14464	-7.45	-6.73
11.7	14473	-7.59	-6.76
11.8	14482	-7.53	-6.98
11.9	14492	-7.46	-6.99
12	14502	-7.37	-6.79
12.1	14512	-7.20	-6.36
12.2	14523	-7.22	-6.42
12.3	14534	-7.28	-5.98
12.4	14545	-7.16	-5.62
12.5	14556	-7.07	-5.50
12.6	14568	-6.99	-5.55
12.7	14580	-7.13	-5.69
12.8	14592	-7.11	-5.85
12.9	14605	-7.12	-6.11
13	14618	-7.16	-6.32
13.1	14631	-7.04	-6.47
13.2	14645	-6.86	-6.47
13.3	14659	-6.94	-7.12
13.4	14673	-6.94	-7.32
13.5	14688	-7.10	-7.75
13.6	14703	-7.00	-7.84
13.7	14718	-7.08	-8.34
13.8	14734	-6.90	-8.92
13.9	14750	-6.89	-9.27
14	14766	-6.74	-9.51
14.1	14783	-6.48	-9.68
14.2	14800	-6.85	-9.49
14.3	14817	-7.60	-11.27
14.4	14835	-6.94	-9.39
14.5	14853	-6.26	-9.59
14.6	14872	-6.93	-8.79
14.7	14891	-6.91	-8.61
14.8	14910	-6.78	-8.64
14.9	14930	-6.82	-8.66
15	14950	-6.74	-8.43
15.1	14970	-6.80	-8.68
15.2	14991	-6.60	-8.54
15.3	15012	-6.77	-8.89
15.4	15033	-6.59	-8.58
15.5	15055	-6.62	-8.51
15.6	15077	-6.53	-8.13
15.7	15100	-6.53	-7.85
15.8	15123	-6.50	-7.42
15.9	15146	-6.62	-7.32
16	15170	-6.65	-7.35
16.1	15194	-6.24	-7.80
16.2	15218	-6.46	-7.74
16.3	15243	-6.43	-7.69
16.4	15268	-6.41	-7.40
16.5	15294	-6.39	-7.36
16.6	15319	-6.66	-8.51
16.7	15345	-6.40	-7.39
16.8	15372	-6.53	-7.61
16.9	15399	-6.41	-7.41
17	15426	-6.46	-7.39
17.1	15454	-7.38	-9.14
17.2	15481	-6.53	-7.20
17.4	15538	-6.71	-7.44
17.5	15567	-6.69	-7.24
17.6	15596	-6.72	-6.94
17.7	15626	-6.81	-7.25
17.8	15656	-6.90	-7.71
17.9	15686	-6.81	-7.60
18	15716	-6.88	-7.44
18.1	15747	-6.98	-7.20
18.2	15778	-6.87	-6.87
18.3	15810	-7.06	-7.40
18.4	15842	-6.99	-7.34
18.5	15874	-6.96	-7.43
18.6	15906	-7.02	-6.94
18.7	15939	-7.27	-7.06
18.8	15972	-7.47	-7.24
18.9	16005	-7.30	-6.95
19	16038	-7.16	-6.78
19.1	16072	-7.24	-6.96
19.2	16106	-7.59	-8.01
19.3	16141	-7.07	-6.89
19.4	16175	-6.96	-6.78
19.5	16210	-7.19	-7.57
19.6	16245	-6.96	-7.34
19.7	16281	-6.73	-7.21
19.8	16316	-6.64	-7.24
19.9	16352	-6.44	-6.65
20	16388	-6.33	-6.56
20.1	16425	-6.00	-7.38
20.2	16462	-5.99	-7.56
20.3	16498	-5.96	-7.92
20.4	16535	-5.84	-7.89
20.5	16573	-5.80	-8.17
20.6	16610	-5.59	-8.27
20.7	16648	-5.64	-8.82
20.8	16686	-5.47	-9.00
20.9	16724	-5.43	-9.26
21	16763	-5.34	-9.15
21.1	16801	-5.48	-9.29
21.2	16840	-5.29	-8.83
21.3	16879	-5.36	-8.68
21.4	16918	-5.39	-8.92
21.5	16958	-5.26	-8.87
21.6	16997	-5.04	-9.08
21.7	17037	-5.04	-9.22
21.8	17077	-5.00	-9.39
21.9	17117	-4.77	-9.68
22	17157	-4.74	-9.09
22.1	17198	-4.74	-8.72
22.2	17238	-4.57	-8.18
22.3	17279	-4.49	-7.85
22.4	17320	-4.50	-7.80
22.5	17361	-4.50	-7.58
22.6	17402	-4.38	-7.37
22.7	17443	-4.39	-7.53
22.8	17485	-4.46	-8.07
22.9	17527	-4.53	-9.12
23	17568	-4.68	-9.66
23.1	17610	-4.74	-9.67
23.2	17652	-4.76	-9.45
23.3	17694	-4.82	-8.90
23.4	17737	-4.78	-8.34
23.5	17779	-4.81	-8.26
23.6	17822	-4.79	-8.75
23.7	17864	-4.82	-9.69
23.8	17907	-4.83	-9.36
23.9	17950	-4.86	-9.04
24	17993	-4.91	-8.57
24.1	18036	-5.03	-8.60
24.2	18079	-5.11	-8.01
24.3	18123	-5.11	-8.39
24.4	18166	-5.09	-8.47
24.5	18210	-5.07	-8.17
24.6	18254	-5.02	-7.80
24.7	18297	-5.04	-7.18
24.8	18341	-5.06	-7.05
24.9	18385	-4.99	-6.94
25	18430	-4.92	-7.02
25.1	18474	-4.94	-7.54
25.2	18518	-4.93	-8.23
25.3	18563	-5.00	-8.01
25.4	18607	-5.02	-7.09
25.5	18652	-4.99	-7.37
25.6	18697	-4.99	-6.57
25.7	18742	-5.03	-6.53
25.8	18787	-5.05	-6.85
25.9	18832	-4.94	-6.84
26	18878	-4.86	-7.27
26.1	18923	-4.79	-7.49
26.2	18969	-4.82	-7.49
26.3	19014	-4.92	-7.44
26.4	19060	-4.93	-7.28
26.5	19106	-4.98	-7.11
26.6	19152	-5.00	-7.11
26.7	19199	-5.03	-7.61
26.8	19245	-5.02	-8.35
26.9	19292	-5.01	-8.48
27	19339	-4.96	-7.79
27.1	19386	-4.91	-7.40
27.2	19433	-4.87	-7.36
27.3	19480	-4.88	-7.67
27.4	19527	-4.84	-7.97
27.5	19575	-4.78	-8.33
27.6	19623	-4.74	-8.54
27.7	19671	-4.78	-7.98
27.8	19719	-4.88	-7.59
27.9	19768	-4.86	-7.18
28	19816	-4.89	-6.92
28.1	19865	-4.92	-6.89
28.2	19915	-4.92	-6.98
28.3	19964	-4.97	-7.32
28.4	20014	-5.08	-7.16
28.5	20064	-5.09	-7.17
28.6	20114	-5.01	-7.22
28.7	20164	-5.27	-7.11
28.8	20215	-5.12	-7.18
28.9	20266	-5.13	-7.74
29	20318	-5.14	-7.80
29.1	20370	-5.39	-8.29
29.2	20422	-5.24	-8.14
29.3	20474	-5.28	-9.03
29.4	20527	-5.25	-9.66
29.5	20581	-5.25	-9.82
29.6	20634	-4.94	-8.93
29.7	20688	-4.91	-8.35
29.8	20743	-5.00	-7.77
29.9	20798	-5.16	-8.03
30	20853	-5.16	-8.41
30.1	20909	-5.12	-8.62
30.2	20966	-4.90	-8.74
30.3	21023	-4.81	-8.52
30.4	21080	-4.70	-8.19
30.5	21138	-4.61	-7.88
30.6	21196	-4.65	-7.62
30.7	21256	-4.80	-7.82
30.8	21315	-4.82	-8.14
30.9	21376	-4.91	-8.76
31	21437	-4.90	-9.30
31.1	21498	-4.85	-9.17
31.2	21560	-4.80	-9.24
31.3	21623	-4.63	-9.12
31.4	21687	-4.64	-9.11
31.5	21752	-4.73	-9.37
31.6	21817	-4.63	-9.65
31.7	21883	-4.56	-10.23
31.8	21950	-4.42	-10.09
31.9	22017	-4.72	-10.53
32	22086	-4.55	-9.84
32.1	22156	-4.49	-10.02
32.2	22226	-4.41	-9.92
32.3	22297	-4.41	-9.81
32.4	22369	-4.40	-9.77
32.5	22443	-4.49	-9.19
32.6	22517	-4.44	-8.54
32.7	22592	-4.48	-8.55
32.8	22669	-4.36	-8.74
32.9	22746	-4.40	-8.94
33	22825	-4.37	-9.19
33.1	22905	-4.53	-9.82
33.2	22986	-4.49	-9.93
33.3	23069	-4.54	-10.27
33.4	23152	-5.00	-9.98
33.5	23237	-4.43	-10.72
33.6	23323	-4.41	-10.20
33.7	23411	-4.39	-9.49
33.8	23500	-4.46	-9.64
33.9	23591	-4.36	-9.13
34	23683	-4.38	-9.15
34.1	23776	-4.41	-9.47
34.2	23872	-4.44	-9.20
34.3	23968	-4.63	-9.31
34.4	24067	-4.60	-10.01
34.5	24167	-4.21	-9.80
34.6	24269	-4.56	-9.30
34.7	24372	-3.85	-9.17
34.8	24478	-3.19	-9.06
34.9	24585	-3.34	-9.28
35	24694	-3.18	-9.37
35.1	24805	-3.07	-9.18
35.2	24918	-3.09	-9.10
35.3	25033	-3.08	-9.18
35.4	25150	-3.07	-8.88
35.5	25270	-3.24	-9.72
35.6	25391	-3.27	-10.23
35.7	25515	-3.27	-10.81
35.8	25641	-3.20	-10.41
35.9	25770	-3.08	-9.95
36	25900	-3.03	-9.96