# Aishihik Basin, Yukon 12,000 Year Multiproxy Lake Sediment 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://ncdc.noaa.gov/paleo/study/18435
#
# Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/aishihik2013age.txt
# 
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Paleolimnology
#--------------------
# Contribution_Date
#	Date: 2015-03-20
#--------------------
# Title
#	Study_Name: Aishihik Basin, Yukon 12,000 Year Multiproxy Lake Sediment Data
#--------------------
# Investigators
# 	Investigators: Rainville, R.A.; Gajewski, K.
#--------------------
# Description_and_Notes
#	Description: Multiproxy sediment data from Lake WA01, Aishihik Basin, southwest Yukon, Canada. Data include pollen counts,
#	sediment physical properties, and charcoal concentration.  
#--------------------
# Publication 
# 	Authors: Rebecca A. Rainville and Konrad Gajewski
#	Published_Date_or_Year: 2013-04-01 
#	Published_Title: Holocene environmental history of the Aishihik Region, Yukon, Canada
#	Journal_Name: Canadian Journal of Earth Sciences
#	Volume: 50
#	Edition: 
#	Issue: 4
#	Pages: 397-405
#	DOI: 10.1139/cjes-2012-0103
#	Online_Resource: http://cjes.geoscienceworld.org/content/50/4/397.abstract
#	Full_Citation: 
#	Abstract: A 2.7 m sediment core from WA01, a small pond in Southwest Yukon, Canada (unofficial name, 61 14'41"N, 136 55'35"W, 1000 m above sea level), documents the postglacial vegetation and climate history of the Aishihik Basin. Open birch-shrub tundra established at the site ca. 10 900 cal years BP, immediately after deglaciation. Picea glauca established ca. 10 200 cal years BP, and an open spruce forest ecosystem has since remained dominant on the landscape. A gradual increase in Alnus crispa, starting ca. 6600 cal years BP, has also been noted in other studies from Central Yukon, suggesting a significant climate transition in Yukon at this time. An alternating pattern in sediment loss-on-ignition, also beginning ca. 6600 cal years BP, may be broadly related to trends in ∂18O values from the Mount Logan and Jellybean Lake oxygen isotope records, and is most likely reflective of periodic changes in available moisture in the region resulting from alterations in the strength and position of the Aleutian Low pressure system. However, millennial-scale climate variability identified in ice core and sediment records had little impact on the forests of the region. 
#------------------
# Funding_Agency 
#	Funding_Agency_Name: Natural Sciences and Engineering Research Council of Canada
#	Grant: 
#------------------
# Site_Information 
#	Site_Name: Lake WA01
#	Location: North America>Canada>Yukon Territory
#	Country: Canada
#	Northernmost_Latitude: 61.2447
#	Southernmost_Latitude: 61.2447 
#	Easternmost_Longitude: -136.9264
#	Westernmost_Longitude: -136.9264 
#	Elevation: 1000 m  
#------------------
# Data_Collection   
#	Collection_Name: WA01age
#	Earliest_Year: 12906
#	Most_Recent_Year: -57
#	Time_Unit: Cal. Year BP
#	Core_Length: m
#	Notes: 
#------------------
# Chronology: 
#
# 	WA01 Chronology Information						
# 		Mean cm			age plus errors	cal years BP	
# 		Mean cm	low	upp	age	lower	upper
# 1	210Pb	0.25	0	0.5	-58.1	-58.1	-58.1
# 2	210Pb	0.75	0.5	1	-57.7	-57.7	-57.7
# 3	210Pb	1.25	1	1.5	-57.3	-57.3	-57.3
# 4	210Pb	1.75	1.5	2	-56.5	-56.5	-56.5
# 5	210Pb	2.25	2	2.5	-55.9	-55.9	-55.9
# 6	210Pb	2.75	2.5	3	-55.3	-55.3	-55.3
# 7	210Pb	3.25	3	3.5	-54.3	-54.3	-54.3
# 8	210Pb	3.75	3.5	4	-53.0	-53.0	-53.0
# 9	210Pb	4.25	4	4.5	-51.7	-51.7	-51.7
# 10	210Pb	4.75	4.5	5	-50.0	-50.0	-50.0
# 11	210Pb	5.25	5	5.5	-47.8	-47.8	-47.8
# 12	210Pb	5.75	5.5	6	-46.1	-46.1	-46.1
# 13	210Pb	6.25	6	6.5	-44.7	-44.7	-44.7
# 14	210Pb	6.75	6.5	7	-42.2	-42.2	-42.2
# 15	210Pb	7.25	7	7.5	-39.5	-39.5	-39.5
# 16	210Pb	7.75	7.5	8	-37.5	-37.5	-37.5
# 17	210Pb	8.25	8	8.5	-35.2	-35.2	-35.2
# 18	210Pb	8.75	8.5	9	-33.0	-33.0	-33.0
# 19	210Pb	9.25	9	9.5	-30.8	-30.8	-30.8
# 20	210Pb	9.75	9.5	10	-28.2	-28.2	-28.2
# 21	210Pb	10.25	10	10.5	-25.3	-25.3	-25.3
# 22	210Pb	10.75	10.5	11	-22.5	-22.5	-22.5
# 23	210Pb	11.25	11	11.5	-19.4	-19.4	-19.4
# 24	210Pb	11.75	11.5	12	-16.7	-16.7	-16.7
# 25	210Pb	12.25	12	12.5	-14.4	-14.4	-14.4
# 26	210Pb	12.75	12.5	13	-11.7	-11.7	-11.7
# 27	210Pb	13.25	13	13.5	-8.8	-8.8	-8.8
# 28	210Pb	13.75	13.5	14	-5.8	-5.8	-5.8
# 29	210Pb	14.25	14	14.5	-3.0	-3.0	-3.0
# 30	210Pb	14.75	14.5	15	0.0	0.0	0.0
# 31	14C	15	13	17	145	0	290
# 32	WRA	55.5	52	59	1147	1014	1256
# 33	14C	92.5	92	93	3580	3470	3690
# 34	14C	128.5	128	129	4800	4730	4870
# 35	14C	189	188	190	7375	7310	7440
# 36	14C	208.5	208	209	8100	8010	8190
# 37	14C	253.5	253	254	10630	10520	10740
#
#
#----------------
# Variables 
#
# Data variables follow that 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_cm	depth, , , cm, , , , ,N
##age_calBP	age, , , calendar years before present, , , , ,N
#
#----------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values:  
# Interpolated age model 
#
depth_cm	age_calBP
0.5	-57.9
1.5	-56.9
2.5	-55.6
3.5	-53.6
4.5	-50.9
5.5	-47.0
6.5	-43.4
7.5	-38.5
8.5	-34.1
9.5	-29.5
10.5	-23.9
11.5	-18.1
12.5	-13.1
13.5	-7.3
14.5	13.8
15.5	27.8
16.5	43.1
17.5	59.6
18.5	77.3
19.5	96.2
20.5	116.3
21.5	137.5
22.5	159.8
23.5	183.1
24.5	207.6
25.5	233.1
26.5	259.6
27.5	287.0
28.5	315.5
29.5	344.9
30.5	375.2
31.5	406.4
32.5	438.4
33.5	471.4
34.5	505.1
35.5	539.7
36.5	575.0
37.5	611.1
38.5	648.0
39.5	685.6
40.5	723.9
41.5	762.9
42.5	802.5
43.5	842.8
44.5	883.7
45.5	925.2
46.5	967.2
47.5	1009.9
48.5	1053.1
49.5	1096.8
50.5	1141.1
51.5	1185.8
52.5	1231.0
53.5	1276.6
54.5	1322.7
55.5	1369.3
56.5	1416.2
57.5	1463.5
58.5	1511.2
59.5	1559.2
60.5	1607.6
61.5	1656.3
62.5	1705.3
63.5	1754.6
64.5	1804.2
65.5	1854.0
66.5	1904.1
67.5	1954.4
68.5	2005.0
69.5	2055.7
70.5	2106.6
71.5	2157.8
72.5	2209.0
73.5	2260.5
74.5	2312.0
75.5	2363.7
76.5	2415.5
77.5	2467.4
78.5	2519.4
79.5	2571.5
80.5	2623.6
81.5	2675.8
82.5	2728.1
83.5	2780.3
84.5	2832.6
85.5	2884.9
86.5	2937.2
87.5	2989.5
88.5	3041.8
89.5	3094.1
90.5	3146.3
91.5	3198.4
92.5	3250.5
93.5	3302.6
94.5	3354.6
95.5	3406.5
96.5	3458.3
97.5	3510.0
98.5	3561.6
99.5	3613.1
100.5	3664.5
101.5	3715.7
102.5	3766.9
103.5	3817.8
104.5	3868.7
105.5	3919.4
106.5	3969.9
107.5	4020.3
108.5	4070.5
109.5	4120.6
110.5	4170.5
111.5	4220.2
112.5	4269.7
113.5	4319.0
114.5	4368.1
115.5	4417.1
116.5	4465.8
117.5	4514.3
118.5	4562.7
119.5	4610.8
120.5	4658.7
121.5	4706.4
122.5	4753.9
123.5	4801.2
124.5	4848.3
124.5	4848.3
125.5	4895.1
126.5	4941.7
127.5	4988.1
128.5	5034.3
129.5	5080.3
130.5	5126.0
131.5	5171.5
132.5	5216.8
133.5	5261.9
134.5	5306.7
135.5	5351.4
136.5	5395.8
137.5	5440.0
138.5	5484.0
139.5	5527.7
140.5	5571.3
141.5	5614.6
142.5	5657.8
143.5	5700.7
144.5	5743.5
145.5	5786.0
146.5	5828.3
147.5	5870.5
148.5	5912.5
149.5	5954.3
150.5	5995.9
151.5	6037.3
152.5	6078.6
153.5	6119.7
154.5	6160.6
155.5	6201.4
156.5	6242.0
157.5	6282.5
158.5	6322.9
159.5	6363.1
160.5	6403.2
161.5	6443.2
162.5	6483.1
163.5	6522.9
164.5	6562.6
165.5	6602.2
166.5	6641.7
167.5	6681.2
168.5	6720.6
169.5	6759.9
170.5	6799.2
171.5	6838.5
172.5	6877.7
173.5	6916.9
174.5	6956.1
175.5	6995.4
176.5	7034.6
177.5	7073.8
178.5	7113.1
179.5	7152.5
180.5	7191.8
181.5	7231.3
182.5	7270.8
183.5	7310.5
184.5	7350.2
185.5	7390.1
186.5	7430.0
187.5	7470.1
188.5	7510.4
189.5	7550.8
190.5	7591.5
191.5	7632.3
192.5	7673.3
193.5	7714.5
194.5	7756.0
195.5	7797.7
196.5	7839.7
197.5	7882.0
198.5	7924.6
199.5	7967.4
200.5	8010.6
201.5	8054.2
202.5	8098.1
203.5	8142.4
204.5	8187.0
205.5	8232.1
206.5	8277.6
207.5	8323.5
208.5	8370.0
209.5	8416.8
210.5	8464.2
211.5	8512.1
212.5	8560.5
213.5	8609.5
214.5	8659.0
215.5	8709.2
216.5	8759.9
217.5	8811.3
218.5	8863.3
219.5	8915.9
220.5	8969.3
221.5	9023.4
222.5	9078.2
223.5	9133.7
224.5	9190.0
225.5	9247.1
226.5	9305.0
227.5	9363.8
228.5	9423.4
229.5	9483.9
230.5	9545.3
231.5	9607.6
232.5	9670.8
233.5	9735.1
234.5	9800.3
235.5	9866.5
236.5	9933.8
237.5	10002.1
238.5	10071.6
239.5	10142.1
240.5	10213.8
241.5	10286.6
242.5	10360.6
243.5	10435.9
244.5	10512.4
245.5	10590.1
246.5	10669.1
247.5	10749.5
248.5	10831.2
249.5	10914.2
250.5	10998.7
251.5	11084.6
252.5	11171.9
253.5	11260.7
254.5	11351.0
255.5	11442.9
256.5	11536.3
257.5	11631.3
258.5	11727.9
259.5	11826.2
260.5	11926.2
261.5	12027.8
262.5	12131.2
263.5	12236.4
264.5	12343.4
265.5	12452.2
266.5	12562.8
267.5	12675.4
268.5	12789.9
269.5	12906.3