Dendrochronology (cf Reimer et al. 2013, 1934)

a) Sample identifier (Dendro-Lab Key-code): L12_249
b) Sample certainly derives from a single tree (Y/N): Y
Rings 84-94 inclusive (1180-1170 cal BP inclusive / AD 770-780 inclusive dated.
c) Site:: Caniapiscau Reservoir, Quebec, Canada, Site L12 (70°24′W / 54°28′N)
d) Object type: subfossil log
e) Preservation: wet
f) Sample type (e.g. core or slice): slice
g) Species: Picea mariana
h) No of rings: 161 tree rings are present in the trunk cross section sampled (AD 687-847) but only the rings 8-160 (AD 694-846) and 3-129 (AD 689-815) have been measured on the two radii, respectively
i) Pith (Y/N): Y
j) Waney edge: N
k) Bark (Y/N): N
l) Sapwood (Y/N): N
m) Methodology used for dating:
Dating was undertaken by cross-matching ring-width series against other trees from the same region using PAST5 and COFECHA.
n) Dated individually (Y/N): N
o) Raw ring width series:
Two radii were measured at a precision of 1/100 mm and then averaged.
Publicly deposited (Y/N): Y
p) Remainder of sample is stored in which archive?
Département de biologie, chimie et géographie, Centre d’Études Nordiques, Université du Québec à Rimouski, Rimouski (Québec), Canada, G5L 3A1

Dendrochronology (cf Reimer et al. 2013, 1934)


a) Sample identifier (Dendro-Lab Key-code): MNP364A
b) Sample certainly derives from a single tree (Y/N): Y
Rings 1164-1174 inclusive (960-950 cal BP) and 954-964 inclusive (1180-1170 cal BP) were dated.
c) Site: Delingha, Qinghai province/China
d) Object type: dead standing tree
e) Preservation: Dry
f) Sample type (e.g. core or slice): slice

g)	Species: Sabina (Juniperus	przewalskii)

h) No of rings:1472
i) Pith (Y/N): Y
j) Waney edge: N
k) Bark (Y/N): N
l) Sapwood (Y/N): N
m) Methodology used for dating:
Dating was done by multiple comparisons of the time series in question with the regional master sequences. Firstly, two records (MNP364A, MNP364B) are compared with each other and get a mean curve series to identification the false rings and missing rings by Tsapwin Scientific software (version of 4.70b). Then the 5 best match positions as candidate for crossdating will be listed with each master chronology, using software Tsapwin. For every position t-values and Gleichläufigkeits-percentages are noted.
The date is determined by checking the possible synchronous positions in the table with statistical tests and verified by visual growth pattern matching in the software package TSAP (Stokes and Smiley, 1968; Rinn, 2003, pp. 21-24).

n)	Dated individually (Y/N)			: Y

Intra-site/phase cross-matching with (Lab-Keycodes, relative positions, Mean curve identifier):

Single curve key code	relative position	Mean curve
MNP364A, MNP364B	Two samples in the same tree	MNP364

Series	Ref	date	t	Glk%	over-lap
MNP364	DLH-MNP-CHR9	BC173-AD1298	15.4	80	1472	DLH-MNP-CHR9 = Master chronology of MNP in version 9
MNP364	Dulan	BC173-AD1298	12.2	72	1472	Dulan = Master chronology of Dulan

Published in:

Yang, B., et al. "A 3,500-year tree-ring record of annual precipitation on the northeastern Tibetan Plateau." Proceedings of the National Academy of Sciences of the United States of America 111.8(2014):2903-8.

Publicly deposited (Y/N): N
p) Remainder of sample is stored in which archive?
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences.
320 Donggang West Road, Lanzhou, 730000, Gansu, China