# Asian Monsoon Region Speleothem Triple Oxygen Isotope Data over the Past 300 Years
#-----------------------------------------------------------------------
#               World Data Service for Paleoclimatology, Boulder
#                                   and
#                      NOAA Paleoclimatology Program
#-----------------------------------------------------------------------
# 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 '#' followed by a space
# Data lines have no '#'
#
# NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/38539
#   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-cave-38539.json
#   Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata.
#
# Data_Type: Speleothems
#
# Dataset_DOI: 10.25921/2b9y-6976
#
# Science_Keywords: hydrology, Monsoon, Other Reconstruction
#---------------------------------------
# Resource_Links
#
# Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/speleothem/asia/sha2023/sha2023-reconstructed.txt
#   Data_Download_Description: NOAA Template File; Asian monsoon Reconstructed-Parent water Oxygen isotope and Cave temperature Data
#
#---------------------------------------
# Contribution_Date
#   Date: 2023-09-20
#---------------------------------------
# File_Last_Modified_Date
#   Date: 2023-11-25
#---------------------------------------
# Title
#   Study_Name: Asian Monsoon Region Speleothem Triple Oxygen Isotope Data over the Past 300 Years
#---------------------------------------
# Investigators
#   Investigators: Sha, Lijuan
#---------------------------------------
# Description_Notes_and_Keywords
#   Description: 
#---------------------------------------
# Publication
#   Authors: Sha, Lijuan, Jasper A. Wassenburg, Lifen Sha, Youwei Li, Shilun Zhou, Qisheng Liang, Jingyao Zhao, Jiaoyang Ruan, Hanying Li, Xinnan Zhao, Pengzhen Duan, Jian Wang, Jiayu Lu, Haiwei Zhang, Gayatri Kathayat, Sasadhar Mahata, Fengmei Ban, Tingyong Li, Hai Cheng
#   Published_Date_or_Year: 2023-10-18
#   Published_Title: Variations in triple oxygen isotope of speleothems from the Asian monsoon region reveal moisture sources over the past 300 years
#   Journal_Name: Communications Earth and Environment
#   Volume: 4
#   Edition: 
#   Issue: 
#   Pages: 
#   Report_Number: 384
#   DOI: 10.1038/s43247-023-01043-6 
#   Online_Resource: 
#   Full_Citation: 
#   Abstract: Characterization of moisture origins is crucial to understanding hydroclimatic processes. Nevertheless, documenting past atmospheric moisture contents and their sources remains challenging partially due to insufficient moisture-tracing proxies. Here, we present triple oxygen isotope compositions in 21 cave speleothems from monsoonal Asia to examine spatial moisture origin differences in eastern Asia over the past 300 years. Our data suggest an isotopic equilibrium fractionation during speleothem formation, and thus parent water 17O anomalies (Δ′17O) values reconstructed from speleothems preserve information on moisture origins and recycling across space. Notably, speleothem Δ′17O records exhibit a distinct geographical distribution, with low values in central-eastern and southern China, high values in northwestern and northern China, and relatively high values in the Yangtze River region. This spatial pattern underscores the diverse influence of different moisture sources regulated by regional hydrological circulation, and demonstrates the potential use of speleothem Δ′17O in reconstructing the moisture cycle at spatial scales.
#---------------------------------------
# Funding_Agency
#   Funding_Agency_Name: National Natural Science Foundation of China
#   Grant: 41888101, 42103005, 42003006, 42272214
#---------------------------------------
# Funding_Agency
#   Funding_Agency_Name: Yunnan Fundamental Research Projects
#   Grant: 202201AS070022) 
#---------------------------------------
# Funding_Agency
#   Funding_Agency_Name: Reserve Talent of the Young and Middle-age Academic and Technical Leader in Yunnan Province
#   Grant: 202205AC160025
#---------------------------------------
# Funding_Agency
#   Funding_Agency_Name: Institute for Basic Science (IBS) Republic of Korea
#   Grant: IBS-R028-Y2
#---------------------------------------
# Site_Information
#   Site_Name: Asian monsoon region
#   Location: Asia
#   Northernmost_Latitude: 40
#   Southernmost_Latitude: 9
#   Easternmost_Longitude: 118.5
#   Westernmost_Longitude: 91.5
#   Elevation_m: 
#---------------------------------------
# Data_Collection
#   Collection_Name: Asian monsoon Reconstructed-Parent water Sha2023
#   First_Year: 1733
#   Last_Year: 2022
#   Time_Unit: year Common Era
#   Core_Length_m: 
#   Parameter_Keywords: oxygen isotopes, geochemistry, age control
#   Notes: 
#---------------------------------------
# Chronology_Information 
# Chronology: 
# 
# No	Location	Cave name	Laber	Latitude (East)	Longitude (N)	Dating method	Age_CE	Mineral composition	
# 1	Guangdong	Niubi Cave	NB2	112.58	24.26	230Th dating	1986	Aragonite	
# 2	Guangdong	Niubi Cave	NB3	112.58	24.26	230Th dating	1952	Aragonite	
# 3	Jiangxi	Shennong Cave	SN4-1	117.25	28.7	230Th dating	2000	Aragonite	
# 4	Jiangxi	Yongquan Cave	YQ15-1-1	115.65	29.61	230Th dating	2000	Aragonite	
# 5	Jiangxi	Yongquan Cave	YQ15-2-1	115.65	29.61	230Th dating	1985	Aragonite	
# 6	Guizhou	Shuanghe Cave	SH-1	107.28	28.25	230Th dating	1733	Calcite	
# 7	Guizhou	Longtan Cave	LT-1	106.22	28.22	Monitoring collection	2020	NaN  
# 8	Chongqing	Furong Cave	FR	107.9	29.22	Monitoring collection	2018	NaN  
# 9	Hunan	Lianhua Cave	LH	109.55	29.15	Monitoring collection	2015	NaN  
# 10	Hubei	Sanbao Cave	SB-M-1	110.43	31.67	230Th dating	2010	Calcite	
# 11	Hubei	Sanbao Cave	SB-M-2	110.43	31.67	230Th dating	2010	Calcite	
# 12	Hubei	Yangxingui Cave	YXG-1	115.35	29.68	230Th dating	1993	Aragonite	
# 13	Hubei	Cijiaping Cave	CJP	110.47	31.76	Monitoring collection	2022	NaN  
# 14	Shandong	Qujia Cave	QJ1	118.42	35.71	230Th dating	1967	Calcite	
# 15	Shandong	Qujia Cave	QJ2	118.42	35.71	230Th dating	1841	Calcite	
# 16	Sichuan	Zhangjia Cave	ZJ1	105.92	32.51	230Th dating	2001	Calcite	
# 17	Sichuan	Zhangjia Cave	ZJ2	105.92	32.51	230Th dating	1874	Calcite	
# 18	Shanxi	Qianfo Cave	QF-1	109.38	33.23	Monitoring collection	2020	NaN  
# 19	Henan	Dongshiya Cave	DSY-1	111.57	33.77	Monitoring collection	2020	NaN  
# 20	Beijing	Jimao Cave	JM2-1	115.88	39.81	230Th dating	2014	Calcite	
# 21	Beijing	Jimao Cave	JM3-1	115.88	39.81	230Th dating	1987	Calcite	
# 22	Beijing	Shihua Cave	SHH	115.93	39.78	230Th dating	1886	Calcite	
# 23	Qinghai	Rige cave	RG	97.2	32.22	230Th dating	2021	NaN  
# 24	Thailand	Tham Sing Khon cave	TSK1-1	99.04	9.04	230Th dating	2018	Aragonite	
# 25	Thailand	Tham Sing Khon cave	TSK1-2	99.04	9.04	230Th dating	1945	Aragonite	
# 26	Thailand	Tham Sing Khon cave	TSK2-1	99.04	9.04	230Th dating	2018	Aragonite	
# 27	Surat Thani	Tham Nhong-Lha cave	TNL3-1	99	9.1	230Th dating	2018	Aragonite	
# 28	Surat Thani	Tham Nhong-Lha cave	TNL3-2	99	9.1	230Th dating	1988	Aragonite	
# 29	Central Myanmar	Lin Noe Twin cave	LNT09-T	96.41	21.24	230Th dating	2000	NaN  
# 30	Central Myanmar	Lin Noe Twin cave	LNT03	96.41	21.24	230Th dating	2010	NaN  
# 31	India	Mawmluh cave	ML8-1	91.88	25.26	230Th dating	1907	Aragonite	
# 
#---------------------------------------
# Variables
# PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.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)
#
## NO.	sample identification,,,,,speleothems; climate reconstructions,,,N,sample number - see Chronology table
## cave_temp	temperature,,,degree Celsius,,speleothems; instrumental,,,N,from cave monitoring
## d18O-CO2	delta 18O,parent water,,per mil VSMOW-SLAP,,speleothems; climate reconstructions,,isotope ratio mass spectrometry,N,Reconstructed-Parent water; MAT-253 Stable Isotope Ratio Mass Spectrometer
## d17O-CO2	delta 17O,parent water,,per mil VSMOW-SLAP,,speleothems; climate reconstructions,,isotope ratio mass spectrometry,N,Reconstructed-Parent water; O2-CO2 Pt-catalyzed oxygen isotope equilibrium;MAT-253 Stable Isotope Ratio Mass Spectrometer
## D'17O-CO2	delta 17O excess,parent water,,per meg VSMOW-SLAP,,speleothems; climate reconstructions,,isotope ratio mass spectrometry,N,Reconstructed-Parent water; D'17O= d'17O – 0.528 × d'18O; O2-CO2 Pt-catalyzed oxygen isotope equilibrium;MAT-253 Stable Isotope Ratio Mass Spectrometer
## D'17O-CO2_1sd	delta 17O excess,parent water,one standard deviation,per meg VSMOW-SLAP,,speleothems; climate reconstructions,,,N,Reconstructed-Parent water
#------------------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing_Values: NA
NO.	cave_temp	d18O-CO2	d17O-CO2	D'17O-CO2	D'17O-CO2_1sd	
1	21	-4.309	-2.264	11	7	
2	21	-4.437	-2.326	17	7	
3	18.5	-6.132	-3.213	25	9	
4	18.5	-4.136	-2.163	21	8	
5	18.5	-4.6	-2.401	27	6	
6	15.1	-6.984	-3.653	34	11	
7	15.1	-5.873	-3.069	32	11	
8	16.3	-6.462	-3.396	16	8	
9	16.5	-5.186	-2.727	11	6	
10	8.5	-10.982	-5.78	19	7	
11	8.5	-9.992	-5.254	22	7	
12	17	-5.849	-3.075	13	7	
13	8.5	-9.556	-5.023	23	8	
14	16	-6.99	-3.671	20	9	
15	16	-7.266	-3.818	18	9	
16	16	-7.757	-4.077	19	7	
17	16	-8.382	-4.407	19	8	
18	16	-6.364	-3.344	16	9	
19	16	-6.877	-3.614	17	9	
20	12	-8.807	-4.619	31	11	
21	12	-9.078	-4.76	33	7	
22	12.9	-7.947	-4.169	27	8	
23	2	-16.415	-8.63	38	11	
24	21	-5.458	-2.864	18	6	
25	21	-5.048	-2.649	16	7	
26	21	-3.29	-1.726	11	7	
27	21	-3.909	-2.048	16	7	
28	21	-3.944	-2.071	12	6	
29	21	-5.868	-3.08	18	7	
30	21	-5.107	-2.679	18	10	
31	18	-3.931	-2.061	15	8