# Eastern Tropical Atlantic Alkenones and Sea Surface Temperatures
#----------------------------------------------------------------------- 
#                World Data Service for Paleoclimatology, Boulder 
#                                  and 
#                     NOAA Paleoclimatology Program 
#             National Centers for Environmental Information (NCEI)
#----------------------------------------------------------------------- 
# Template Version 4.0
# Encoding: UTF-8
# NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. 
#
# Description/Documentation lines begin with #
# Data lines have no #
#
# NOAA_Landing_Page:  https://www.ncei.noaa.gov/access/paleo-search/study/2603
#   Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata.
#
# Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-ocean-2603.xml
#   Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata.
#
# Data_Type: Paleoceanography
#
# Dataset_DOI: 10.25921/e4es-4v37
#
# Science_Keywords:
#--------------------
# Resource_Links
#   
# Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/zhao1995/zhao1995-odp658c-noaa.txt
#   Data_Download_Description: NOAA Template File; Alkenone Data and Sea Surface Temperature Reconstruction
#
#--------------------
# Contribution_Date
#   Date: 1995-07-01
#--------------------
# File_Last_Modified_Date
#   Date: 2024-09-23
#--------------------
# Title
#   Study_Name: Eastern Tropical Atlantic Alkenones and Sea Surface Temperatures
#--------------------
# Investigators
#   Investigators: Zhao, M.; Beveridge, N.A.S.; Shackleton, N.J.; Sarnthein, M. (https://orcid.org/0000-0002-8106-000X); Eglinton, G.
#--------------------
# Description_Notes_and_Keywords
#   Description: Alkenone data from marine sediment cores in the eastern tropical Atlantic, off the coast of northwest Africa, and sea surface temperature reconstruction for ~84 KYr. Note: For ODP 658C, the age scale has been modified several times. A C14 agescale from May 2004 is used here, not the one published in Zhao et al. 1995.
#--------------------
# Publication 
#   Authors: Zhao, M., N.A.S. Beveridge, N.J. Shackleton, M. Sarnthein, and G. Eglinton
#   Published_Date_or_Year: 1995
#   Published_Title: Molecular stratigraphy of cores off northwest Africa: Sea surface temperature history over the last 80 ka.
#   Journal_Name: Paleoceanography
#   Volume: 10
#   Edition: 
#   Issue: 3
#   Pages: 661-675
#   Report_Number: 
#   DOI: 10.1029/94PA03354
#   Online_Resource: 
#   Full_Citation:
#   Abstract: The molecular stratigraphy of BOFS core 31K and ODP Hole 658C has been studied for C37 alkenone abundances over the past 80 ka at high resolution (~circa 200-500 years). The derived Uk37 sea surface temperature record for both cores shows a range of temperatures from about 18C during the last glacial to 21.5C during the early Holocene. Both records also reveal changes in SST as much as 2C - 4C over a few hundred years, which correlate well with similar abrupt climatic changes observed in cores from elsewhere in the NE Atlantic, associated with "Heinrich events". Our results indicate that meltwater produced by these ice-rafting events was transmitted southward by the Canary Current, where it had considerable impact on SSTs in the subtropical eastern Atlantic.
#--------------------
# Funding_Agency 
#   Funding_Agency_Name: 
#   Grant: 
#--------------------
# Site_Information 
#   Site_Name: ODP 658C
#   Location: North Atlantic Ocean
#   Northernmost_Latitude: 20.749167
#   Southernmost_Latitude: 20.749167
#   Easternmost_Longitude: -18.580833
#   Westernmost_Longitude: -18.580833
#   Elevation_m: -2263
#--------------------
# Data_Collection  
#   Collection_Name: ODP658CZ
#   First_Year: 83906
#   Last_Year: 92
#   Time_Unit: 14C yr BP
#   Core_Length_m: 
#   Parameter_Keywords: biomarkers, reconstruction
#   Notes: For ODP 658C, the age scale has been modified several times. A C14 agescale from May 2004 is used here, not the one published in Zhao et al. 1995.
#--------------------
# Chronology_Information
#   Chronology: 
#--------------------
# Variables  
#
# PaST_Thesaurus_Download_Resource:  https://www.ncei.noaa.gov/pub/data/paleo/PaST-thesaurus/SKOS/past-thesaurus-v1.0.rdf
#   PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format.
#
# Data variables follow that are preceded by "##" in columns one and two.
# Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data)
#
## depth_m	depth,,,meter,paleoceanography;climate reconstructions,,,N,
## age_14CkaBP	age,,,radiocarbon kiloyear before present,,paleoceanography;climate reconstructions,,,N,
## uk37	alkenone unsaturation index Uk37 prime,,,dimensionless,,paleoceanography,,,N,
## SST_uk37	sea surface temperature,alkenone unsaturation index,,degree Celsius,,paleoceanography;climate reconstructions,,,N,
#
#--------------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing_Values:
depth_m	age_14CkaBP	uk37	SST_uk37
0.04	0.092	0.741	20.662
0.06	0.139	0.736	20.515
0.08	0.185	0.736	20.485
0.1	0.231	0.741	20.632
0.12	0.277	0.741	20.647
0.14	0.323	0.743	20.721
0.16	0.369	0.744	20.75
0.18	0.416	0.746	20.809
0.2	0.488	0.741	20.647
0.22	0.561	0.723	20.132
0.24	0.633	0.738	20.559
0.26	0.706	0.709	19.691
0.28	0.778	0.662	18.324
0.3	0.851	0.709	19.706
0.32	0.923	0.744	20.75
0.34	0.995	0.746	20.809
0.36	1.068	0.744	20.735
0.38	1.14	0.744	20.75
0.4	1.213	0.751	20.941
0.42	1.285	0.743	20.706
0.44	1.358	0.737	20.529
0.55	1.757	0.742	20.676
0.57	1.829	0.731	20.353
0.59	1.902	0.735	20.456
0.61	1.974	0.743	20.721
0.63	2.047	0.733	20.397
0.65	2.119	0.728	20.25
0.67	2.21	0.73	20.309
0.69	2.301	0.734	20.441
0.71	2.392	0.738	20.574
0.73	2.482	0.729	20.294
0.75	2.573	0.744	20.735
0.77	2.664	0.736	20.5
0.79	2.755	0.722	20.088
0.81	2.845	0.739	20.603
0.83	2.936	0.74	20.618
0.85	3.027	0.735	20.456
0.87	3.118	0.741	20.632
0.89	3.208	0.751	20.926
0.91	3.299	0.764	21.324
0.93	3.39	0.751	20.926
0.95	3.481	0.731	20.368
0.97	3.572	0.741	20.632
0.99	3.662	0.744	20.735
1.02	3.799	0.731	20.353
1.04	3.889	0.743	20.706
1.06	3.98	0.751	20.941
1.08	4.071	0.738	20.544
1.1	4.162	0.74	20.618
1.12	4.252	0.743	20.721
1.14	4.343	0.772	21.544
1.16	4.434	0.757	21.103
1.18	4.525	0.757	21.132
1.2	4.616	0.751	20.956
1.22	4.706	0.74	20.618
1.24	4.797	0.749	20.882
1.26	4.888	0.739	20.588
1.28	4.979	0.744	20.75
1.3	5.069	0.746	20.794
1.32	5.167	0.758	21.147
1.34	5.265	0.764	21.338
1.36	5.363	0.771	21.529
1.38	5.461	0.772	21.544
1.4	5.559	0.762	21.265
1.42	5.657	0.757	21.103
1.44	5.755	0.761	21.235
1.46	5.852	0.761	21.221
1.48	5.95	0.754	21.015
1.5	6.048	0.749	20.897
1.51	6.097	0.764	21.309
1.53	6.195	0.768	21.441
1.55	6.293	0.77	21.515
1.57	6.391	0.763	21.294
1.59	6.489	0.758	21.147
1.61	6.587	0.764	21.309
1.63	6.684	0.767	21.412
1.65	6.782	0.765	21.353
1.67	6.88	0.761	21.221
1.69	6.978	0.765	21.353
1.71	7.076	0.76	21.206
1.73	7.174	0.762	21.279
1.75	7.272	0.757	21.103
1.77	7.322	0.761	21.235
1.79	7.373	0.761	21.221
1.81	7.424	0.757	21.132
1.83	7.475	0.751	20.926
1.85	7.526	0.752	20.971
1.87	7.576	0.733	20.426
1.89	7.627	0.728	20.279
1.91	7.678	0.752	20.985
1.93	7.729	0.73	20.324
1.95	7.78	0.725	20.176
1.97	7.83	0.723	20.118
1.99	7.881	0.731	20.353
2.01	7.932	0.707	19.647
2.03	7.983	0.7	19.441
2.05	8.033	0.707	19.632
2.07	8.084	0.704	19.547
2.09	8.135	0.705	19.588
2.11	8.186	0.704	19.574
2.13	8.237	0.701	19.471
2.15	8.287	0.698	19.382
2.17	8.338	0.71	19.72
2.19	8.389	0.7	19.32
2.21	8.44	0.71	19.65
2.23	8.491	0.71	19.63
2.25	8.541	0.7	19.34
2.27	8.592	0.71	19.6
2.29	8.643	0.71	19.63
2.31	8.694	0.705	19.588
2.33	8.744	0.7	19.441
2.35	8.795	0.697	19.353
2.37	8.846	0.696	19.324
2.39	8.897	0.695	19.294
2.41	8.948	0.693	19.235
2.43	8.998	0.691	19.191
2.45	9.049	0.692	19.206
2.47	9.1	0.69	19.147
2.49	9.253	0.689	19.103
2.55	9.711	0.65	17.971
2.57	9.864	0.665	18.397
2.59	10.017	0.658	18.191
2.61	10.124	0.651	18
2.63	10.177	0.641	17.706
2.65	10.23	0.655	18.118
2.67	10.402	0.658	18.206
2.69	10.575	0.655	18.132
2.71	10.748	0.649	17.926
2.73	10.921	0.665	18.397
2.75	11.094	0.651	18
2.77	11.267	0.673	18.647
2.79	11.44	0.672	18.618
2.81	11.612	0.682	18.912
2.83	11.785	0.671	18.588
2.85	11.958	0.671	18.588
2.87	12.131	0.663	18.353
2.89	12.304	0.658	18.191
2.91	12.477	0.665	18.426
2.93	12.649	0.675	18.706
2.95	12.822	0.665	18.412
2.97	12.995	0.662	18.324
2.99	13.168	0.657	18.162
3.01	13.341	0.65	17.971
3.03	13.514	0.649	17.926
3.05	13.673	0.65	17.985
3.07	13.784	0.655	18.118
3.09	13.896	0.647	17.882
3.11	14.008	0.657	18.176
3.13	14.119	0.659	18.235
3.15	14.231	0.649	17.941
3.17	14.343	0.658	18.221
3.19	14.455	0.674	18.676
3.21	14.566	0.673	18.662
3.23	14.678	0.677	18.765
3.25	14.79	0.681	18.868
3.27	15.01	0.693	19.235
3.29	15.241	0.681	18.882
3.31	15.473	0.681	18.868
3.33	15.704	0.673	18.662
3.35	15.936	0.681	18.868
3.37	15.81	0.702	19.515
3.39	15.915	0.694	19.265
3.41	16.021	0.698	19.382
3.43	16.126	0.698	19.382
3.45	16.232	0.678	18.779
3.47	16.337	0.676	18.735
3.49	16.443	0.666	18.441
3.51	16.548	0.691	19.176
3.53	16.654	0.682	18.912
3.55	16.759	0.707	19.647
3.57	16.865	0.708	19.676
3.59	16.97	0.725	20.176
3.61	17.076	0.723	20.118
3.63	17.181	0.724	20.147
3.65	17.287	0.713	19.809
3.67	17.394	0.706	19.618
3.69	17.501	0.702	19.5
3.71	17.609	0.693	19.235
3.73	17.716	0.698	19.368
3.75	17.823	0.691	19.162
3.77	17.93	0.695	19.294
3.79	18.037	0.705	19.588
3.81	18.144	0.712	19.794
3.83	18.252	0.714	19.838
3.85	18.359	0.71	19.721
3.87	18.466	0.721	20.044
3.89	18.573	0.717	19.926
3.91	18.68	0.721	20.044
3.93	18.788	0.73	20.309
3.95	18.895	0.728	20.25
3.97	19.002	0.718	19.971
3.99	19.109	0.697	19.353
4.01	19.216	0.685	19
4.03	19.323	0.681	18.868
4.05	19.431	0.685	18.985
4.07	19.538	0.668	18.5
4.09	19.645	0.667	18.471
4.11	19.847	0.648	17.912
4.13	20.085	0.623	17.162
4.15	20.26	0.589	16.176
4.17	20.435	0.615	16.926
4.19	20.61	0.613	16.868
4.21	20.785	0.583	15.985
4.23	20.96	0.653	18.059
4.25	21.135	0.619	17.059
4.27	21.31	0.646	17.838
4.29	21.485	0.666	18.441
4.31	21.66	0.677	18.765
4.33	21.835	0.657	18.162
4.35	22.01	0.658	18.191
4.37	22.185	0.672	18.618
4.39	22.36	0.679	18.809
4.41	22.535	0.633	17.471
4.43	22.71	0.646	17.853
4.45	22.885	0.642	17.735
4.47	23.06	0.65	17.971
4.49	23.236	0.637	17.588
4.51	23.411	0.674	18.676
4.53	23.586	0.673	18.632
4.55	23.761	0.679	18.824
4.57	23.936	0.684	18.956
4.59	24.111	0.682	18.897
4.61	24.286	0.682	18.912
4.63	24.461	0.678	18.794
4.65	24.636	0.684	18.971
4.67	24.811	0.685	19
4.69	24.986	0.686	19.015
4.71	25.161	0.672	18.603
4.73	25.336	0.657	18.176
4.75	25.511	0.662	18.335
4.77	25.697	0.678	18.794
4.79	25.75	0.691	19.176
4.81	25.802	0.677	18.765
4.83	25.855	0.682	18.897
4.85	25.908	0.687	19.044
4.87	25.96	0.67	18.559
4.89	26.013	0.663	18.353
4.91	26.191	0.678	18.779
4.93	26.344	0.657	18.162
4.95	26.497	0.647	17.868
4.97	26.651	0.645	17.824
4.99	26.804	0.652	18.015
5.01	26.957	0.677	18.75
5.03	27.111	0.671	18.574
5.05	27.264	0.65	17.971
5.07	27.418	0.645	17.809
5.09	27.571	0.649	17.941
5.11	27.724	0.656	18.147
5.13	27.878	0.67	18.559
5.15	28.031	0.685	19
5.17	28.184	0.677	18.765
5.19	28.338	0.671	18.588
5.21	28.491	0.689	19.103
5.23	28.644	0.701	19.456
5.25	28.798	0.686	19.029
5.27	28.951	0.682	18.912
5.29	29.105	0.683	18.941
5.31	29.258	0.675	18.706
5.33	29.411	0.679	18.824
5.35	29.565	0.696	19.324
5.37	29.718	0.683	18.941
5.39	29.871	0.69	19.147
5.41	30.025	0.692	19.191
5.43	30.178	0.69	19.147
5.45	30.331	0.692	19.206
5.47	30.485	0.69	19.132
5.49	30.638	0.685	18.985
5.51	30.791	0.673	18.632
5.53	30.945	0.677	18.75
5.55	31.098	0.681	18.882
5.57	31.252	0.695	19.294
5.59	31.405	0.689	19.118
5.61	31.558	0.692	19.191
5.63	31.712	0.683	18.941
5.65	31.865	0.673	18.632
5.67	32.018	0.687	19.059
5.69	32.172	0.651	17.985
5.71	32.325	0.679	18.809
5.73	32.478	0.686	19.015
5.75	32.632	0.694	19.265
5.77	32.785	0.688	19.088
5.79	32.939	0.685	19
5.81	33.092	0.672	18.603
5.83	33.245	0.648	17.912
5.85	33.399	0.663	18.338
5.87	33.552	0.649	17.941
5.89	33.705	0.65	17.971
5.91	33.859	0.653	18.044
5.93	34.012	0.69	19.132
5.95	34.165	0.646	17.838
5.97	34.319	0.59	16.206
5.99	34.472	0.607	16.691
6.01	34.625	0.631	17.412
6.03	34.779	0.618	17.015
6.05	34.932	0.582	15.971
6.07	35.086	0.605	16.632
6.09	35.239	0.605	16.632
6.11	35.392	0.604	16.618
6.13	35.546	0.605	16.632
6.15	35.699	0.58	15.897
6.17	35.852	0.612	16.853
6.19	36.006	0.62	17.074
6.21	36.159	0.61	16.794
6.23	36.312	0.616	16.956
6.26	36.543	0.589	16.176
6.28	36.696	0.521	14.176
6.3	36.849	0.635	17.529
6.32	37.003	0.576	15.779
6.34	37.156	0.584	16.029
6.36	37.309	0.581	15.926
6.38	37.463	0.587	16.103
6.41	37.693	0.637	17.588
6.43	37.846	0.682	18.912
6.49	38.306	0.682	18.912
6.55	38.766	0.685	19
6.61	39.226	0.686	19.029
6.67	39.686	0.629	17.353
6.73	40.146	0.682	18.912
6.79	40.607	0.686	19.029
6.85	41.067	0.685	19
6.91	41.527	0.688	19.088
6.97	41.987	0.692	19.206
7.03	42.447	0.698	19.382
7.09	42.907	0.665	18.412
7.15	43.367	0.692	19.206
7.21	43.827	0.685	19
7.27	44.287	0.688	19.088
7.33	44.747	0.67	18.559
7.39	45.207	0.674	18.676
7.45	45.667	0.681	18.882
7.51	46.128	0.677	18.765
7.57	46.588	0.685	19
7.63	47.048	0.686	19.029
7.69	47.508	0.699	19.412
7.75	47.968	0.707	19.647
7.81	48.428	0.697	19.353
7.87	48.888	0.695	19.294
7.93	49.348	0.694	19.265
7.99	49.808	0.693	19.235
8.05	50.268	0.673	18.647
8.11	50.728	0.654	18.088
8.17	51.188	0.615	16.941
8.23	51.649	0.666	18.441
8.29	52.109	0.648	17.912
8.35	52.569	0.646	17.853
8.43	53.182	0.65	17.971
8.49	53.642	0.656	18.147
8.55	54.102	0.657	18.176
8.61	54.562	0.679	18.824
8.67	55.022	0.649	17.941
8.73	55.483	0.678	18.794
8.79	55.943	0.671	18.588
8.85	56.403	0.663	18.353
8.91	56.863	0.651	18
8.97	57.323	0.659	18.235
9.03	57.783	0.652	18.029
9.09	58.243	0.664	18.382
9.15	58.703	0.653	18.059
9.21	59.094	0.666	18.441
9.27	59.432	0.663	18.353
9.33	59.771	0.673	18.647
9.39	60.109	0.639	17.647
9.43	60.335	0.652	18.029
9.49	60.674	0.66	18.265
9.55	61.012	0.639	17.647
9.61	61.351	0.641	17.706
9.67	61.689	0.641	17.706
9.73	62.028	0.634	17.5
9.79	62.366	0.644	17.794
9.85	62.705	0.619	17.059
9.91	63.044	0.611	16.824
9.97	63.382	0.591	16.235
10.03	63.721	0.633	17.471
10.09	64.059	0.581	15.941
10.15	64.398	0.565	15.471
10.21	64.736	0.606	16.676
10.27	65.075	0.624	17.206
10.33	65.414	0.625	17.235
10.39	65.752	0.624	17.206
10.45	66.091	0.656	18.147
10.51	66.429	0.656	18.147
10.57	66.768	0.653	18.059
10.63	67.106	0.628	17.324
10.69	67.445	0.632	17.441
10.75	67.783	0.634	17.5
10.81	68.122	0.633	17.471
10.87	68.461	0.599	16.471
10.93	68.799	0.654	18.088
10.99	69.138	0.648	17.912
11.05	69.692	0.661	18.294
11.11	70.29	0.686	19.029
11.17	70.887	0.687	19.059
11.23	71.485	0.688	19.088
11.29	72.083	0.683	18.941
11.35	72.68	0.694	19.265
11.41	73.278	0.722	20.088
11.47	73.876	0.715	19.882
11.53	74.473	0.706	19.618
11.59	75.071	0.724	20.147
11.65	75.668	0.697	19.353
11.71	76.266	0.733	20.412
11.77	76.864	0.707	19.647
11.83	77.461	0.717	19.941
11.89	78.059	0.741	20.647
11.95	78.657	0.737	20.529
12.01	79.254	0.748	20.853
12.07	79.676	0.722	20.088
12.13	80.099	0.729	20.294
12.19	80.522	0.718	19.971
12.25	80.945	0.686	19.029
12.31	81.368	0.693	19.235
12.37	81.791	0.697	19.353
12.43	82.214	0.689	19.118
12.49	82.637	0.662	18.324
12.55	83.06	0.669	18.529
12.61	83.483	0.669	18.529
12.67	83.906	0.674	18.676