# East China Sea, Northern Okinawa Trough Trace Element Data over the Last 400,000 Years
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#                World Data Service for Paleoclimatology, Boulder 
#                                  and 
#                     NOAA Paleoclimatology Program 
#             National Centers for Environmental Information (NCEI)
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# Template Version 3.0
# Encoding: UTF-8
# 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: https://www.ncdc.noaa.gov/paleo/study/33432
#       Description: NOAA Landing Page of this study
# Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/zhao2021/zhao2021-u1429-icp-ms.txt
#       Description: NOAA Template File; IODP U1429 ICP-MS Trace Element Data
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# Description/Documentation lines begin with #
# Data lines have no #
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# Data_Type: Paleoceanography
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# Dataset_DOI: 
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# Parameter_Keywords: geochemistry
#--------------------
# Contribution_Date
#	Date:  2021-05-14
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# File_Last_Modified_Date
#	Date:  2021-05-14
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# Title
#	Study_Name: East China Sea, Northern Okinawa Trough Trace Element Data over the Last 400,000 Years 
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# Investigators
#	Investigators: Zhao, Debo; Wan, Shiming; Lu, Zhengyao; Zhai, Lina; Feng, Xuguang; Shi, Xuefa; Li, Anchun
#-------------------
# Description_Notes_and_Keywords
#	Description: Redox sensitive elements as a proxy for North Pacific Intermediate Water in northern East Asian marginal sea.
#       Keywords: North Pacific Intermediate Water, paleoceanography reconstructions, redox sensitive elements, East China Sea, IODP Site U1429
#--------------------
# Publication 
#	Authors: Zhao Debo, Wan Shiming, Lu Zhengyao, Zhai Lina, Feng Xuguang, Shi Xuefa, and Li Anchun
#	Published_Date_or_Year:  2021      
#	Published_Title: Delayed collapse of the North Pacific Intermediate Water after the glacial termination
#	Journal_Name: Geophysical Research Letters
#	Volume: 
#	Edition: 
#	Issue: 
#	Pages:
#	Report_Number: 
#	DOI: 
#	Online_Resource: 
#	Full_Citation: 
#	Abstract: The carbon release from the subarctic Pacific in glacial-interglacial cycles has been mainly linked to the North Pacific Intermediate Water (NPIW) formation and associated carbon/nutrient water upwelling and biological productivity, suggesting the significant role of NPIW in the global carbon cycle. However, the causes of the past NPIW formation remain controversial. Here we report a high-resolution sediment record of NPIW evolution based on the paleo-redox changes in the Western North Pacific during the last 400 ka. Our proxy and model simulation results reveal the delayed collapse of NPIW after the glacial termination was coeval with decreased salinity of intermediate water mass in the subarctic Pacific. We attributed these salinity anomalies to the increased local net rainfall forced by delayed Northern Hemisphere warming compared with the Southern Ocean. Such atmospheric-oceanic interactions in the subarctic Pacific probably make a contribution to maintain high atmospheric CO2 concentrations through weakened intermediate-to-deep ocean stratification and reduced subsurface biological pump net efficiency, countering the return to more stratified conditions in the Southern Ocean, which should drive down atmospheric CO2 during the early interglacial.
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# Funding_Agency 
#	Funding_Agency_Name: Chinese Academy of Sciences
#	Grant: Strategic Priority Research Program XDB40010100
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# Funding_Agency 
#	Funding_Agency_Name: National Natural Science Foundation of China
#	Grant: 41806055, 41876068
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# Funding_Agency 
#	Funding_Agency_Name: Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology
#	Grant: MGQNLM201903
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# Site_Information 
#	Site_Name: IODP U1429
#	Location: East China Sea
#	Country:  
#	Northernmost_Latitude: 31.617333 
# 	Southernmost_Latitude: 31.617333 
# 	Easternmost_Longitude: 128.9975 
# 	Westernmost_Longitude: 128.9975 
# 	Elevation: -732  
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# Data_Collection   
#	Collection_Name: IODP U1429 trace element ICP-MS Zhao2021
#	Earliest_Year: 392620
#	Most_Recent_Year: 320
#	Time_Unit: cal yr BP
#	Core_Length: 151.1
#	Notes: 
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# Variables 
#
# Data variables follow are preceded by "##" in columns one and two.
# *** MORE DETAILED INSTRUCTIONS are available at www1.ncdc.noaa.gov/pub/data/paleo/templates/Variable_naming_guide.pdf
# variable format:  shortname	what,material,error,units,seasonality,data_type,detail,method,data_format,additional_information) 
#
## Depth_CCSF-D	depth,,, meter,,paleoceanography,,,N, spliced composite depth below seafloor
## Age_ka	age,,,calendar kiloyear before present,,paleoceanography,,,N, Benthic Chronology
## Th	thorium,,, milligram per kilogram,,paleoceanography,,inductively-coupled plasma mass spectrometry,N,
## U	uranium,,, milligram per kilogram,,paleoceanography,,inductively-coupled plasma mass spectrometry,N,
## Uauth	uranium,,, milligram per kilogram,,paleoceanography,,inductively-coupled plasma mass spectrometry,N,authigenic uranium
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# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing_Values:  NA
#
Depth_CCSF-D	Age_ka	Th	U	Uauth
0.17 	0.09 	7.82 	3.70 	2.04 
1.77 	4.98 	8.09 	4.02 	2.30 
3.97 	10.42 	8.85 	4.97 	3.09 
6.40 	14.40 	8.90 	3.79 	1.90 
8.80 	18.32 	11.29 	4.21 	1.82 
11.18 	21.89 	11.28 	3.42 	1.02 
13.58 	25.51 	10.19 	3.57 	1.41 
16.03 	29.20 	9.67 	3.39 	1.34 
19.04 	33.73 	9.45 	3.66 	1.66 
21.44 	37.34 	9.16 	3.43 	1.49 
23.84 	40.29 	9.85 	3.30 	1.21 
28.65 	46.20 	10.68 	3.36 	1.09 
31.05 	49.78 	9.07 	3.27 	1.34 
33.45 	53.36 	9.75 	3.40 	1.33 
35.85 	57.99 	10.67 	4.72 	2.45 
38.26 	63.52 	10.67 	5.05 	2.78 
40.66 	69.02 	10.09 	3.30 	1.16 
43.09 	74.60 	8.13 	5.10 	3.37 
44.89 	79.22 	7.97 	3.32 	1.63 
47.30 	85.08 	9.77 	3.67 	1.59 
53.11 	90.04 	7.53 	3.87 	2.27 
56.31 	95.39 	7.07 	4.28 	2.77 
58.71 	101.52 	8.24 	6.00 	4.25 
61.11 	109.95 	8.15 	5.47 	3.74 
63.51 	118.96 	9.53 	6.34 	4.31 
65.94 	125.61 	7.80 	3.92 	2.26 
68.34 	130.33 	9.02 	4.94 	3.02 
70.54 	134.67 	8.15 	4.37 	2.64 
72.94 	138.58 	9.77 	4.03 	1.96 
75.34 	142.43 	9.85 	3.17 	1.08 
77.71 	146.23 	9.53 	3.00 	0.98 
84.97 	157.88 	10.87 	3.30 	0.99 
87.39 	161.77 	8.55 	3.25 	1.43 
89.71 	165.49 	9.60 	4.11 	2.07 
92.11 	170.82 	7.45 	3.81 	2.22 
94.53 	177.08 	9.41 	3.86 	1.86 
96.14 	181.24 	8.90 	3.70 	1.80 
97.74 	185.37 	9.37 	3.52 	1.53 
99.34 	189.50 	9.90 	3.62 	1.52 
100.96 	193.70 	9.37 	3.92 	1.93 
102.56 	197.83 	7.40 	3.86 	2.29 
103.76 	201.28 	7.55 	4.37 	2.77 
105.36 	206.43 	6.89 	3.94 	2.48 
106.16 	209.01 	7.16 	3.61 	2.09 
109.64 	215.72 	6.73 	4.44 	3.01 
112.04 	220.75 	8.75 	2.91 	1.05 
113.64 	224.29 	9.12 	4.15 	2.22 
115.99 	229.51 	9.64 	3.50 	1.45 
119.20 	236.61 	7.81 	2.96 	1.30 
120.79 	242.17 	10.95 	3.14 	0.82 
128.95 	249.14 	10.40 	3.62 	1.41 
130.51 	252.40 	11.22 	3.20 	0.82 
133.73 	259.18 	10.10 	3.29 	1.15 
135.33 	262.54 	10.57 	3.75 	1.50 
137.93 	268.00 	10.95 	4.06 	1.73 
139.53 	271.36 	11.54 	3.77 	1.32 
141.15 	274.78 	11.82 	3.50 	0.99 
143.65 	280.04 	7.99 	3.09 	1.40 
146.05 	285.15 	7.36 	4.03 	2.47 
148.42 	290.31 	8.79 	3.07 	1.20 
150.85 	295.60 	9.44 	4.29 	2.29 
153.27 	301.20 	7.41 	3.61 	2.03 
155.67 	310.18 	6.86 	2.97 	1.52 
158.01 	318.91 	9.98 	5.66 	3.54 
160.37 	327.76 	7.87 	2.59 	0.91 
162.29 	333.18 	10.02 	2.97 	0.85 
167.09 	346.99 	13.32 	3.49 	0.66 
169.49 	354.90 	13.32 	3.59 	0.76 
171.83 	362.60 	11.51 	3.42 	0.97 
174.21 	370.44 	11.01 	3.13 	0.79 
176.37 	377.54 	9.85 	3.03 	0.94 
178.77 	385.45 	7.59 	2.94 	1.33 
180.94 	392.62 	7.61 	3.10 	1.49