# TALDICE Ice Core 55-112 KYrBP Methane and Calcium 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:16492 
#
# Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2011ca.txt
# 
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Ice Cores
#--------------------
# Contribution_Date
#	Date: 2014-05-27
#--------------------
# Title
#	Study_Name: TALDICE Ice Core 55-112 KYrBP Methane and Calcium Data
#--------------------
# Investigators
#       Investigators: Schüpbach, S.; Federer, U.; Bigler, M.; Fischer, H.; Stocker, T.F.
#--------------------
# Description_and_Notes
#	Description: High-resolution methane and calcium data from the TALDICE ice core, used in development 
#	of the TALDICE 1a timescale, synchronized to the EPICA Dome C ice core.
#--------------------
# Publication 
#       Authors: S. Schüpbach, U. Federer, M. Bigler, H. Fischer, and T.F. Stocker
#       Published_Date_or_Year: 2011-09-26     
#       Published_Title: A refined TALDICE-1a age scale from 55 to 112 ka before present for the Talos Dome ice core based on high-resolution methane measurements
#       Journal_Name: Climate of the Past
#       Volume: 7
#       Edition: 
#       Issue: 3
#       Pages: 1001-1009
#       DOI: 10.5194/cp-7-1001-2011
#       Online_Resource: www.clim-past.net/7/1001/2011/
#       Full_Citation: 
#       Abstract: A precise synchronization of different climate records is indispensable for a correct dynamical interpretation of paleoclimatic data. A chronology for the TALDICE ice core from the Ross Sea sector of East Antarctica has recently been presented based on methane synchronization with Greenland and the EDC ice cores and d18Oice synchronization with EDC in the bottom part (TALDICE-1). Using new high-resolution methane data obtained with a continuous flow analysis technique, we present a refined age scale for the age interval from 55-112 thousand years (ka) before present, where TALDICE is synchronized with EDC. New and more precise tie points reduce the uncertainties of the age scale from up to 1900 yr in TALDICE-1 to below 1100 yr over most of the refined interval and shift the Talos Dome dating to significantly younger ages during the onset of Marine Isotope Stage 3. Thus, discussions of climate dynamics at sub-millennial time scales are now possible back to 110 ka, in particular during the inception of the last ice age. Calcium data of EDC and TALDICE are compared to show the impact of the refinement to the synchronization of the two ice cores not only for the gas but also for the ice age scale.
#------------------
# Funding_Agency 
#       Funding_Agency_Name: Swiss National Science Foundation
#       Grant: 
#------------------
# Funding_Agency 
#       Funding_Agency_Name: Prince Albert II of Monaco Foundation
#       Grant: 
#------------------
# Site_Information 
#       Site_Name: TALDICE ice core
#       Location: Antarctica 
#	Country: 
#	Northernmost_Latitude: -72.8167 
# 	Southernmost_Latitude: -72.8167 
# 	Easternmost_Longitude: 159.1833
# 	Westernmost_Longitude: 159.1833
# 	Elevation: 2319 m  
#------------------
# Data_Collection   
#	Collection_Name: TALDICE2011Ca
#	Earliest_Year: 80842
#	Most_Recent_Year: 54172
#	Time_Unit: Cal. Year BP
#	Core_Length: m
#	Notes: 
#------------------
# Chronology: AICC2012
# 
# 	
#----------------	
# 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) 
##depth_m	depth from top, , , m, , ice core, , , N
##age_ice_calBP	Age ice, , , years before 1950 AD (yr BP), , ice core, chronology: AICC2012, , N
##Ca ppb	Calcium concentration, , 10%, ppbw, , ice core, , continuous flow analysis, N	
#
#----------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values: NaN
#

depth_m	age_ice_calBP	Ca ppb
1220.50	54172	2.7
1221.00	54236	2.9
1221.50	54300	3.0
1222.00	54364	3.2
1222.50	54430	4.1
1223.00	54495	3.6
1223.50	54561	4.8
1224.00	54627	3.8
1224.50	54694	4.4
1225.00	54761	5.0
1225.50	54830	9.0
1226.00	54899	4.0
1226.50	54968	5.1
1227.00	55037	4.5
1227.50	55107	5.3
1228.00	55177	5.6
1228.50	55246	NaN
1229.00	55315	5.6
1229.50	55385	5.3
1230.00	55455	6.1
1230.50	55528	6.5
1231.00	55602	6.2
1231.50	55677	5.7
1232.00	55753	5.6
1232.50	55827	4.7
1233.00	55900	6.2
1233.50	55971	5.1
1234.00	56041	5.0
1234.50	56113	6.3
1235.00	56185	5.4
1235.50	56261	6.3
1236.00	56336	6.2
1236.50	56414	6.3
1237.00	56493	8.0
1237.50	56574	7.5
1238.00	56655	7.6
1238.50	56740	7.1
1239.00	56824	7.7
1239.50	56908	7.7
1240.00	56993	7.3
1240.50	57073	6.6
1241.00	57154	6.7
1241.50	57231	7.3
1242.00	57308	8.5
1242.50	57384	9.1
1243.00	57460	6.8
1243.50	57537	6.0
1244.00	57613	5.6
1244.50	57690	6.8
1245.00	57767	6.7
1245.50	57842	2.5
1246.00	57917	4.7
1246.50	57991	6.7
1247.00	58065	4.1
1247.50	58140	5.0
1248.00	58215	5.0
1248.50	58289	3.8
1249.00	58364	4.3
1249.50	58437	3.3
1250.00	58511	3.4
1250.50	58585	5.0
1251.00	58659	4.9
1251.50	58736	4.4
1252.00	58814	5.4
1252.50	58890	4.6
1253.00	58966	4.3
1253.50	59040	5.7
1254.00	59113	3.7
1254.50	59184	3.5
1255.00	59255	3.4
1255.50	59328	3.9
1256.00	59401	4.4
1256.50	59476	5.6
1257.00	59551	NaN
1257.50	59626	NaN
1258.00	59701	3.2
1258.50	59778	4.3
1259.00	59855	3.3
1259.50	59935	3.2
1260.00	60015	4.8
1260.50	60097	3.4
1261.00	60179	2.6
1261.50	60263	NaN
1262.00	60346	5.0
1262.50	60430	4.4
1263.00	60515	5.2
1263.50	60602	5.0
1264.00	60689	5.6
1264.50	60777	5.0
1265.00	60866	5.6
1265.50	60957	6.5
1266.00	61048	6.7
1266.50	61142	7.3
1267.00	61237	7.2
1267.50	61334	7.0
1268.00	61431	8.0
1268.50	61530	7.0
1269.00	61630	6.8
1269.50	61729	6.5
1270.00	61829	7.2
1270.50	61929	7.1
1271.00	62029	6.4
1271.50	62130	9.4
1272.00	62230	11.7
1272.50	62334	NaN
1273.00	62437	8.4
1273.50	62543	8.1
1274.00	62649	8.5
1274.50	62764	NaN
1275.00	62879	9.5
1275.50	62997	8.1
1276.00	63115	7.6
1276.50	63235	NaN
1277.00	63355	NaN
1277.50	63481	NaN
1278.00	63607	NaN
1278.50	63737	NaN
1279.00	63867	NaN
1279.50	64001	NaN
1280.00	64135	11.5
1280.50	64273	13.1
1281.00	64411	12.3
1281.50	64539	12.6
1282.00	64668	9.6
1282.50	64796	7.8
1283.00	64924	7.5
1283.50	65055	10.2
1284.00	65186	8.7
1284.50	65331	9.8
1285.00	65475	10.6
1285.50	65623	9.9
1286.00	65772	8.9
1286.50	65920	10.5
1287.00	66069	9.1
1287.50	66221	10.0
1288.00	66372	11.4
1288.50	66531	11.9
1289.00	66690	12.5
1289.50	66860	15.3
1290.00	67029	11.9
1290.50	67201	12.1
1291.00	67373	12.1
1291.50	67550	12.3
1292.00	67727	11.4
1292.50	67911	11.9
1293.00	68095	12.6
1293.50	68286	13.8
1294.00	68477	14.8
1294.50	68677	14.5
1295.00	68877	13.9
1295.50	69083	13.0
1296.00	69290	12.5
1296.50	69493	12.2
1297.00	69697	7.5
1297.50	69905	9.1
1298.00	70113	10.2
1298.50	70328	12.9
1299.00	70543	10.1
1299.50	70759	8.0
1300.00	70976	5.8
1300.50	71186	4.9
1301.00	71397	3.8
1301.50	71595	4.0
1302.00	71792	4.0
1302.50	71985	2.6
1303.00	72179	2.4
1303.50	72374	2.7
1304.00	72569	2.4
1304.50	72772	4.1
1305.00	72976	3.3
1305.50	73181	3.3
1306.00	73387	3.3
1306.50	73601	5.0
1307.00	73815	6.4
1307.50	74045	5.5
1308.00	74275	5.5
1308.50	74492	4.1
1309.00	74710	3.6
1309.50	74919	3.0
1310.00	75127	3.5
1310.50	75313	3.4
1311.00	75498	3.1
1311.50	75677	2.9
1312.00	75857	2.2
1312.50	76036	2.4
1313.00	76215	2.8
1313.50	76400	3.2
1314.00	76584	3.2
1314.50	76788	4.0
1315.00	76991	6.4
1315.50	77201	6.3
1316.00	77410	4.5
1316.50	77623	5.7
1317.00	77836	4.4
1317.50	78042	4.0
1318.00	78249	4.4
1318.50	78459	4.1
1319.00	78670	4.0
1319.50	78887	3.5
1320.00	79103	3.5
1320.50	79322	3.2
1321.00	79540	3.2
1321.50	79757	3.0
1322.00	79973	3.2
1322.50	80191	2.6
1323.00	80409	2.4
1323.50	80625	2.2
1324.00	80842	2.7