# Palau Coral 50 Year Stable Isotope Calibration 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://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:16338
#
# Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ngb.txt
# 
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Corals and Sclerosponges
#--------------------
# Contribution_Date
#	Date: 2014-04-11
#--------------------
# Title
#	Study_Name: Palau Coral 50 Year Stable Isotope Calibration Data 
#--------------------
# Investigators
#       Investigators: Osborne, M.C.; Dunbar, R.B.; Mucciarone, D.A.; Sanchez-Cabeza, J.-A.; Druffel, E.
#--------------------
# Description_and_Notes
#	Description: Stable isotope (d18O and d13C) data for the past 50 years at monthly resolution 
#       from 4 coral cores collected in November 2008 from massive Porites lutea colonies at four sites
#       in the Republic of Palau.
#--------------------
# Publication 
#       Authors: Michael C. Osborne, Robert B. Dunbar, David A. Mucciarone, Joan-Albert Sanchez-Cabeza, Ellen Druffel
#       Published_Date_or_Year: 2013-09-15      
#       Published_Title: Regional calibration of coral-based climate reconstructions from Palau, West Pacific Warm Pool (WPWP)
#       Journal_Name: Palaeogeography, Palaeoclimatology, Palaeoecology
#       Volume: 386
#       Edition: 
#       Issue: 
#       Pages: 308-320
#       DOI: 10.1016/j.palaeo.2013.06.001
#       Online_Resource: http://www.sciencedirect.com/science/article/pii/S0031018213002757
#       Full_Citation: 
#       Abstract: Stable isotopic and trace element records from corals collected within the West Pacific Warm Pool (WPWP) are well suited to examine interannual to decadal climate variability associated with the El Nino-Southern Oscillation (ENSO) phenomenon. The most commonly used climate recorder in corals is d18O (d18OCRL), a parameter subject to multiple regional and local environmental influences. Location-specific calibration of d18OCRL is a necessary first step for developing long-term paleoceanographic reconstructions. Here we present four new coral d18O stratigraphies from the Republic of Palau (7.5N 134.5E), and compare our records with instrumental measurements for the period 1950-2008. We also compare our results with a previously published coral record from Palau. We employ a new sea surface salinity (SSS) product and validate its utility for coral-based paleoclimate calibrations. We not only examine differences among the records but also identify strong and regionally coherent environmental signals. We find that SSS variability is the dominant influence on d18OCRL in Palau, while sea surface temperature (SST) is of secondary importance. Our results show that time-averaging multiple d18OCRL records into a single composite series produce greater correlations with instrumental data and indices than individual stratigraphies alone. Our results are consistent with observations of a strengthening of the hydrological cycle in the WPWP region over the past 50 years, though the magnitudes of long term linear trends differ among the different Palau d18OCRL records. Interannual and interdecadal variabilities between the Palau d18OCRL records are more consistent than the long term linear trends. Monthly Palauan d18OCRL anomalies capture strong El Nino events with high fidelity over the calibration period. This study provides constraints for future paleoenvironmental investigations in Palau using longer coral records.
#------------------
# Funding_Agency 
#       Funding_Agency_Name: IAEA
#       Grant: Project "Nuclear and isotopic studies of the El Nino phenomenon in the ocean"
#------------------
# Funding_Agency 
#       Funding_Agency_Name: U.S. National Science Foundation
#       Grant: OCE-0941199
#------------------
# Site_Information 
#       Site_Name: Ngeragabel
#       Location: Ocean>Pacific Ocean>Western Pacific Ocean>Micronesia>Palau
#	Country: Republic of Palau
#	Northernmost_Latitude: 7.4064
# 	Southernmost_Latitude: 7.4064
# 	Easternmost_Longitude: 134.4353
# 	Westernmost_Longitude: 134.4353
# 	Elevation: m  
#------------------
# Data_Collection   
#	Collection_Name: Palau2013NGB
#	Earliest_Year: 1963
#	Most_Recent_Year: 2008
#	Time_Unit: AD
#	Core_Length: m
#	Notes: 
#------------------
# Chronology: 
# 
#
#
# 	
#----------------	
# 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) 
#
##age_AD	age, , , AD, , , , ,N
##d13Cporite	delta13C, porites, , per mil VPDB, ,coral, , ,N 
##d18Oporite	delta18O, porites, , per mil VPDB, ,coral, , ,N 
#
#----------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values:  
#
age_AD	d13Cporite	d18Oporite
2008.17	-2.530275675	-5.711921547
2008.08	-2.427745141	-5.726342889
2008.00	-2.433367679	-5.859392468
2007.92	-2.253701369	-5.881129369
2007.83	-2.611269612	-5.902558659
2007.75	-2.279406623	-6.127070701
2007.67	-2.294179469	-5.996829237
2007.58	-2.527643562	-5.773384264
2007.50	-2.459094077	-5.786732671
2007.42	-2.31010276	-5.862903998
2007.33	-2.333801945	-5.861351596
2007.25	-2.18890654	-5.500273909
2007.17	-2.308398645	-5.494581442
2007.08	-2.570285514	-5.67173832
2007.00	-2.525022744	-5.667275984
2006.92	-2.535454754	-5.73087866
2006.83	-2.52128801	-5.766008709
2006.75	-2.019581146	-5.790477344
2006.67	-2.831395133	-6.065841201
2006.58	-2.608351021	-5.944691425
2006.50	-2.841039988	-5.962416504
2006.42	-2.49404027	-5.929628328
2006.33	-2.685418403	-5.796441112
2006.25	-2.505983113	-5.636568376
2006.17	-2.51674675	-5.555792439
2006.08	-2.745870525	-5.622294087
2006.00	-2.406379026	-5.681042687
2005.92	-2.701704502	-5.789099619
2005.83	-2.768268438	-5.956491802
2005.75	-2.625846116	-5.846812474
2005.67	-2.725477523	-5.591326923
2005.58	-2.792153326	-5.8741863
2005.50	-2.781623455	-5.89098439
2005.42	-2.782771263	-5.777999612
2005.33	-2.950367365	-5.592129109
2005.25	-2.82036495	-5.51927922
2005.17	-2.764898392	-5.411719654
2005.08	-2.583541593	-5.679851822
2005.00	-2.514696747	-5.716297289
2004.92	-2.233317662	-5.642247013
2004.83	-2.649707409	-5.657860611
2004.75	-2.526997006	-5.574572203
2004.67	-3.079198963	-5.742639475
2004.58	-2.948961671	-5.770304051
2004.50	-2.315598341	-5.634744976
2004.42	-2.579742103	-5.698611286
2004.33	-2.695053982	-5.793526375
2004.25	-2.470215898	-5.753851646
2004.17	-2.391705843	-5.57022271
2004.08	-2.75926979	-5.649313037
2004.00	-2.591627392	-5.633414478
2003.92	-3.072774603	-5.716523896
2003.83	-2.790021006	-5.710141488
2003.75	-2.721713532	-5.692146619
2003.67	-2.73456678	-5.647042606
2003.58	-2.414628994	-5.644844642
2003.50	-2.907196734	-5.70413927
2003.42	-2.717526755	-5.672927648
2003.33	-2.913132368	-5.743319835
2003.25	-2.697572353	-5.412524099
2003.17	-2.644420903	-5.371389608
2003.08	-2.664951492	-5.481626709
2003.00	-3.05290489	-5.512580917
2002.92	-2.88856698	-5.493887527
2002.83	-2.519238542	-5.612740757
2002.75	-2.690319472	-5.635296753
2002.67	-2.823529411	-5.681450222
2002.58	-2.958342145	-5.514181541
2002.50	-2.673183702	-5.77831582
2002.42	-2.805203099	-5.66516715
2002.33	-2.506050092	-5.640515773
2002.25	-2.365366366	-5.510836036
2002.17	-1.826631995	-5.451952312
2002.08	-2.707085404	-5.775212129
2002.00	-2.752437356	-5.871039001
2001.92	-2.457956324	-5.801158898
2001.83	-2.334664423	-5.716358931
2001.75	-2.379733481	-5.78233622
2001.67	-2.512321564	-5.744894836
2001.58	-2.450046264	-5.788323542
2001.50	-2.551261135	-5.817284911
2001.42	-2.709713645	-5.65328771
2001.33	-2.516580904	-5.686374212
2001.25	-2.660574272	-5.743862601
2001.17	-2.498362871	-5.573469017
2001.08	-2.389021142	-5.696634128
2001.00	-2.760851418	-5.714664181
2000.92	-2.941769453	-5.850935314
2000.83	-2.764735601	-5.84782539
2000.75	-2.482719583	-5.835596157
2000.67	-2.593523355	-5.855059479
2000.58	-2.722235666	-5.850421215
2000.50	-2.756257365	-5.768019902
2000.42	-2.665237518	-5.756034706
2000.33	-2.731122537	-5.68286599
2000.25	-2.943509579	-5.663912844
2000.17	-2.342044207	-5.508670185
2000.08	-2.303393126	-5.567487975
2000.00	-2.618314368	-5.652533637
1999.92	-2.851226842	-5.677259856
1999.83	-2.93116657	-5.70448567
1999.75	-2.935540481	-5.786918366
1999.67	-2.787141891	-5.816261147
1999.58	-2.548621568	-5.757808114
1999.50	-2.638759592	-5.82815892
1999.42	-2.662144152	-5.827198985
1999.33	-2.538977086	-5.839366872
1999.25	-2.474245577	-5.986994288
1999.17	-2.295093628	-5.920632217
1999.08	-1.963390561	-5.974822853
1999.00	-1.658104392	-5.799188469
1998.92	-1.134803983	-5.650801037
1998.83	-0.964634868	-5.4794291
1998.75	-0.566611084	-5.422856663
1998.67	-1.504677506	-5.328100536
1998.58	-2.73644981	-5.547157143
1998.50	-2.24032888	-5.628236626
1998.42	-2.341147753	-5.654536102
1998.33	-2.39014134	-5.412516926
1998.25	-2.552766653	-5.302643154
1998.17	-2.507676931	-5.26317725
1998.08	-2.468653148	-5.277879538
1998.00	-2.428841181	-5.309988376
1997.92	-2.164015979	-5.319224048
1997.83	-2.43804292	-5.505214195
1997.75	-2.487873305	-5.572095978
1997.67	-2.270702427	-5.461032296
1997.58	-2.259094553	-5.449588349
1997.50	-2.459359261	-5.495001171
1997.42	-2.660346997	-5.641713439
1997.33	-2.960210707	-5.513346412
1997.25	-2.605380181	-5.462091211
1997.17	-2.400689932	-5.371376369
1997.08	-2.504921175	-5.423879895
1997.00	-3.005149263	-5.465655772
1996.92	-2.62408942	-5.542629356
1996.83	-2.878063654	-5.709460598
1996.75	-2.672972611	-5.831315567
1996.67	-2.440436216	-5.842544411
1996.58	-2.530259537	-5.840120358
1996.50	-2.418837412	-5.76861399
1996.42	-2.451055039	-5.94242454
1996.33	-2.654661944	-5.726019293
1996.25	-2.587900464	-5.596753303
1996.17	-2.412089439	-5.45591626
1996.08	-2.416999732	-5.534975019
1996.00	-2.539676212	-5.632508442
1995.92	-2.607985106	-5.68284172
1995.83	-2.439785958	-5.74693735
1995.75	-2.508160646	-5.683954503
1995.67	-2.460174015	-5.699067194
1995.58	-2.225874645	-5.648437752
1995.50	-2.216964842	-5.510885862
1995.42	-2.305992708	-5.496326954
1995.33	-2.450642887	-5.452608766
1995.25	-2.152300462	-5.315050138
1995.17	-2.095594873	-5.192576038
1995.08	-2.361636785	-5.440584727
1995.00	-2.598441706	-5.53766616
1994.92	-2.688027402	-5.626715818
1994.83	-2.519202938	-5.57381736
1994.75	-2.440945884	-5.617258908
1994.67	-2.748243108	-5.628211816
1994.58	-3.062039195	-5.732584512
1994.50	-2.742650976	-5.789793121
1994.42	-2.650850636	-5.71688036
1994.33	-2.695911789	-5.577927869
1994.25	-2.424001059	-5.580000224
1994.17	-2.327685347	-5.417286026
1994.08	-2.603666422	-5.471804284
1994.00	-2.44887709	-5.47187318
1993.92	-2.705106885	-5.643698474
1993.83	-2.35113596	-5.592224228
1993.75	-2.416250361	-5.586092322
1993.67	-2.519373998	-5.600020801
1993.58	-2.632850181	-5.465182207
1993.50	-2.458453169	-5.609830963
1993.42	-2.500249052	-5.533259254
1993.33	-2.427444275	-5.487083364
1993.25	-2.613689782	-5.468647563
1993.17	-2.503838631	-5.250409458
1993.08	-2.395419685	-5.358730572
1993.00	-2.431357142	-5.245856328
1992.92	-2.532202818	-5.403261344
1992.83	-2.343708607	-5.500579689
1992.75	-2.531439447	-5.539373729
1992.67	-2.496763563	-5.63984246
1992.58	-2.447061262	-5.686370877
1992.50	-2.367184442	-5.607271009
1992.42	-2.472329291	-5.603236186
1992.33	-2.350757739	-5.483412161
1992.25	-2.409881489	-5.262634902
1992.17	-2.273078533	-5.190190647
1992.08	-2.28510136	-5.201223749
1992.00	-2.367583052	-5.36571326
1991.92	-2.477346272	-5.493058226
1991.83	-2.538825571	-5.531557085
1991.75	-2.486774585	-5.596410195
1991.67	-2.435704182	-5.503349266
1991.58	-2.391547381	-5.576162879
1991.50	-2.397355316	-5.616333764
1991.42	-2.422224857	-5.520817224
1991.33	-2.48008177	-5.486493102
1991.25	-2.447196591	-5.424906066
1991.17	-2.206735601	-5.149399387
1991.08	-2.657844992	-5.314414322
1991.00	-2.53161188	-5.347914601
1990.92	-2.35672359	-5.514297561
1990.83	-2.515947363	-5.621299703
1990.75	-2.248700252	-5.427862929
1990.67	-2.481104431	-5.622390938
1990.58	-2.145159526	-5.60130464
1990.50	-2.480595847	-5.600061577
1990.42	-2.415634608	-5.441382985
1990.33	-2.358788902	-5.403158548
1990.25	-2.444185753	-5.319354858
1990.17	-2.040685167	-5.202335464
1990.08	-2.145632939	-5.381580931
1990.00	-2.245785262	-5.401001228
1989.92	-2.147337463	-5.465630443
1989.83	-2.270083895	-5.744114029
1989.75	-2.561597659	-5.769958371
1989.67	-2.355526416	-5.688139066
1989.58	-2.096333445	-5.651830389
1989.50	-1.994778624	-5.725563633
1989.42	-2.052774519	-5.758159185
1989.33	-2.048196018	-5.79905936
1989.25	-2.113307065	-5.609227497
1989.17	-1.807515731	-5.550563919
1989.08	-2.300629312	-5.492096878
1989.00	-2.00643566	-5.435832991
1988.92	-2.086554514	-5.448927758
1988.83	-2.24283298	-5.561355051
1988.75	-2.413569129	-5.753888912
1988.67	-2.266429176	-5.690793621
1988.58	-2.630130599	-5.70298185
1988.50	-2.269119785	-5.721330374
1988.42	-2.180385897	-5.654616756
1988.33	-2.169429357	-5.796857161
1988.25	-1.534848501	-5.499470768
1988.17	-0.472878	-5.297781097
1988.08	-1.107031893	-5.405145606
1988.00	-1.903757516	-5.50728086
1987.92	-1.928886063	-5.574088036
1987.83	-2.218420496	-5.589500534
1987.75	-2.273858881	-5.694481515
1987.67	-2.390035283	-5.769107846
1987.58	-2.288084935	-5.625452629
1987.50	-2.504807224	-5.691157448
1987.42	-2.449154462	-5.591281719
1987.33	-2.332266768	-5.460856831
1987.25	-2.138589324	-5.405443633
1987.17	-2.116592398	-5.215174305
1987.08	-2.216029365	-5.258321725
1987.00	-2.346355233	-5.27413084
1986.92	-2.379546394	-5.355326759
1986.83	-2.129230954	-5.551478053
1986.75	-2.160909026	-5.642105612
1986.67	-2.201449862	-5.440044033
1986.58	-1.876520634	-5.461945266
1986.50	-2.238052056	-5.633678848
1986.42	-2.280110588	-5.653869259
1986.33	-2.149361665	-5.339276295
1986.25	-2.013155738	-5.289352327
1986.17	-1.810101261	-5.230181324
1986.08	-1.884060743	-5.411865867
1986.00	-2.27376528	-5.387373854
1985.92	-2.186276401	-5.437612341
1985.83	-2.387229903	-5.605577658
1985.75	-2.193469856	-5.541104879
1985.67	-2.17448605	-5.584654103
1985.58	-2.063306117	-5.514979702
1985.50	-2.231082062	-5.459752464
1985.42	-2.586103213	-5.35302998
1985.33	-2.442980718	-5.40019999
1985.25	-2.345168865	-5.322612194
1985.17	-1.922924271	-5.192064392
1985.08	-2.280872486	-5.327259491
1985.00	-2.289843544	-5.307369236
1984.92	-2.052440307	-5.344202642
1984.83	-2.223542204	-5.355872738
1984.75	-2.144011669	-5.44947243
1984.67	-1.960913054	-5.519462456
1984.58	-2.260674969	-5.533081155
1984.50	-2.328041782	-5.571220028
1984.42	-2.359464591	-5.495710282
1984.33	-2.591333004	-5.572059986
1984.25	-2.313598901	-5.473931379
1984.17	-2.052448025	-5.3131796
1984.08	-2.411392952	-5.330070721
1984.00	-2.459143029	-5.351364996
1983.92	-2.266110926	-5.44417556
1983.83	-2.1356213	-5.432808029
1983.75	-2.196544362	-5.448368295
1983.67	-2.246236192	-5.453629942
1983.58	-2.252766268	-5.526445822
1983.50	-2.286627522	-5.537970173
1983.42	-2.41308841	-5.449146142
1983.33	-2.548272268	-5.189070261
1983.25	-2.41803496	-5.213464394
1983.17	-1.942608824	-5.094205963
1983.08	-2.056409852	-5.110570182
1983.00	-1.588497332	-5.155339411
1982.92	-1.889284065	-5.319101806
1982.83	-2.138635758	-5.351926467
1982.75	-2.150102697	-5.312024367
1982.67	-2.19519508	-5.539257481
1982.58	-2.467760743	-5.459184926
1982.50	-2.357495732	-5.597457542
1982.42	-2.611236226	-5.659414855
1982.33	-2.596377571	-5.548459779
1982.25	-2.307583036	-5.592517082
1982.17	-2.176709404	-5.412014591
1982.08	-2.237001897	-5.605452796
1982.00	-2.203094292	-5.577692607
1981.92	-1.959055406	-5.562255743
1981.83	-2.082841845	-5.647496925
1981.75	-2.013445068	-5.633649213
1981.67	-2.273298918	-5.801110433
1981.58	-2.257713024	-5.744128718
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1981.08	-1.961968602	-5.418456197
1981.00	-2.03676855	-5.568219148
1980.92	-2.325931063	-5.804939854
1980.83	-2.259264438	-5.782192159
1980.75	-2.346941086	-5.76316959
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1980.33	-2.391630587	-5.709709992
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1980.00	-2.227862725	-5.445156294
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1979.00	-1.876896968	-5.333432304
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1975.92	-1.503796725	-5.392444893
1975.83	-1.210137835	-5.35801326
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1975.67	-1.363656935	-5.563083575
1975.58	-1.073052205	-5.280518343
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1975.25	-1.733092433	-5.026331739
1975.17	-1.43743365	-4.796403992
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1971.17	-1.25461798	-4.892822611
1971.08	-1.742372146	-5.238713848
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1970.17	-0.680050542	-4.803570377
1970.08	-1.350204101	-5.138004887
1970.00	-1.240073433	-5.366060364
1969.92	-1.332377782	-5.274808514
1969.83	-1.607550969	-5.340165722
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1969.33	-1.638682117	-5.102652657
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1969.08	-1.778501199	-5.249418567
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1965.17	-1.021008005	-5.290055859
1965.08	-1.352311918	-5.41616021
1965.00	-1.324306708	-5.430176984
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1964.67	-1.677853964	-5.612177155
1964.58	-1.462553084	-5.756041396
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1964.42	-1.553884336	-5.638346052
1964.33	-1.689171371	-5.458515954
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1964.17	-1.574057808	-5.234880077
1964.08	-1.575910439	-5.384669888
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1963.92	-1.463376751	-5.452715504
1963.83	-1.401068201	-5.471101391
1963.75	-1.5362569	-5.577833282
1963.67	-1.573788633	-5.615506756
1963.58	-1.331909051	-5.518988716
1963.50	-1.449801316	-5.514890301
1963.42	-1.329370966	-5.531514275
1963.33	-1.624802341	-5.498015511
1963.25	-1.419007411	-5.372832882
1963.17	-1.455643764	-5.293612587