Keyan Fang et al.
Supporting Online Material (SOM) for
Spatiotemporal variability of tree growth over Northwest China and its association with
climate
Running title: Climate-growth interactions in NW China
Keyan Fang, Xiaohua Gou, Fahu Chen
Key Laboratory of Western China’s Environmental Systems (MOE), Research School of
Western Environment and Climate Change, Lanzhou University, Lanzhou China, 730000
Edward Cook
Tree-Ring Lab, Lamont-Doherty Earth Observatory of Columbia University, New York, NY
USA 10964
Jinbao Li
International Pacific Research Center, School of Ocean and Earth Science and Technology,
University of Hawaii, Honolulu, HI USA 96882
Yingjun Li
Key Laboratory of Western China’s Environmental Systems (MOE), Lanzhou University,
Lanzhou China, 730000
This file contains:
Table S1 to S3
References
Figure S1
1
Keyan Fang et al.
Table S1 Site and chronology statistics of various locations which were grouped into clusters
as shown in Figure 1. The explained variances for clusters of F, H and I were not shown,
because these groupings were not based solely on results of RPCA.
Group
A
B
Explained
ID*
Variance
DEZQIN
GOUQIN
HEBQIN
LAJQIN
MQAXJP
MQBXJP
MQDXJP
16.7%
MQFXJP
MQRXJP
TDAXJP
TDBXJP
HBLXJP
HBMXJP
HBHXJP
15.5%
Species
PIFL
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
JUPR
Time
Span**
1358-2004
1382-2004
1600-2004
1522-2004
1166-2001
1090-2002
1350-2002
1279-2002
1090-2002
1490-2002
1540-2002
1570-2002
1510-2002
1563-2002
Longitude
(°E)
100.49
100.48
100.47
100.43
100.21
99.47
99.40
99.41
99.41
100.48
100.49
100.49
100.49
100.49
Latitude
(°N)
34.45
34.44
34.44
34.43
35.04
34.47
34.43
34.45
34.45
34.47
34.47
34.47
34.47
34.47
Elevation
(m a.s.l.)
3495
3370
3385
3375
3540
3600
3650
3675
3665
3290
3350
3880
3890
3957
Reference
[Peng et
al., 2008]
[Gou et
al., 2008]
[Peng et
al., 2008]
DQHZHO JUPR
1433-2004 100.04
35.00
3722
SYKRWL
BSIRWL
XINLOL
XINLML
XINLOM
XINLOH
TULUGH
TULGHM
TULGLM
TULGOL
MOSIGH
MOSIHM
MOSILM
MOSIGL
PITA
PITA
PIWI
PIWI
PIWI
PIWI
PICR
PICR
PICR
PICR
PITA
PITA
PITA
PITA
1776-1999
1820-1999
1829-2003
1805-2003
1836-2003
1843-2003
1865-2003
1899-2003
1881-2003
1912-2003
1887-2003
1912-2003
1890-2003
1897-2003
38.72
38.72
35.27
35.30
35.46
35.51
36.58
36.59
36.61
36.63
36.81
36.82
36.84
36.86
2150
2175
2370
2460
2570
2660
2690
2630
2550
2325
2400
2340
2290
2230
[Li et al.,
2007]
KENGPS
BIGKPS
BEQURU
PISC
PISC
PISC
1729-2004 81.43
1713-2004 82.08
1760-1993 87.07
42.48
42.53
43.08
2593
2610
2440
[Cook et
al., 2010]
[Yuan et
2
105.98
105.98
103.98
104.01
104.03
104.09
102.65
102.67
102.69
102.71
102.91
102.93
102.94
102.95
[Fang et
al., 2009]
Keyan Fang et al.
HXBURU
XGSURU
ZEDURU
FUKBAI
JIALPS
GOLQIA
KUERPS
HUTXIA
HUTSHI
TIANPS
MIQAPS
MIQBPS
PISC
PISC
PISC
PISC
PISC
PISC
PISC
PISC
PISC
PISC
PISC
PISC
1719-1993
1770-1993
1743-1993
1877-2004
1674-2004
1737-2004
1696-2004
1786-2004
1846-2004
1728-2004
1713-2002
1689-2002
87.11
87.14
87.03
88.15
82.09
82.69
82.52
86.30
86.70
88.07
87.55
88.01
43.11
43.16
43.13
43.95
43.04
43.08
43.09
43.79
43.71
43.53
43.46
43.48
2360
2070
2390
1820
2308
1710
1499
1900
1910
1925
1980
2070
WULANJ
JUPR
0-2000
98.41
37.02
3704
DULAJP
SHENJP
DUSHJP
JUPR
JUPR
JUPR
900-1993
900-1993
876-1993
98.05
98.05
98.05
36.18
37.00
36.39
3800
3653
3324
DELINH
JUPR
990-2001
97.93
37.45
3600
TIAANG
TIALEN
TIAZHA
ABCH
ABCH
ABCH
1911-2005 106.47
1857-2005 106.25
1856-2005 106.55
34.25
34.35
34.19
2510
2234
2375
HUASPI
PIAR
1589-1990 110.05
34.29
2020
SANGTS
TSCH
1725-1992 107.48
33.39
1540
GHEGAN JUPR
YINBPS
PISC
1795-2000 101.32
1735-2000 101.36
37.56
37.48
2800
2895
[Gou et
al., 2005]
BLKALS
BLKBLS
LASI
LASI
1718-2002 93.18
1802-2002 93.23
43.51
43.50
2810
2840
[Peng et
al., 2008]
H
QUMAJP
ZHIDJP
JUPR
JUPR
1584-2002 96.08
1486-2002 96.17
33.48
33.43
4225
4215
[Qin
et
al., 2003]
I
YCHAPS
YCHBPS
PISC
PISC
1764-2001 76.59
1666-2001 77.00
37.36
37.36
2920
2750
Others
ZHANGX PITB
1616-2006 104.28
34.38
2436
C
D
E
12.0%
8.2%
4.7%
F
G
2.9%
3
al., 2003]
[Cook et
al., 2010]
[Li et al.,
2006]
[Zhang et
al., 2003]
[Sheppard
et
al.,
2004]
[Zhang
and Qiu,
2007]
[Shao and
Wu, 1994]
[Liu and
Shao,
2003]
[Fang et
Keyan Fang et al.
SUNLZU
*
JUPR
1686-2000 98.48
38.58
2312
al., 2010]
[Gou et
al., 2005]
LASI = Larix sibirica; PISC = Picea schrenkiana; PIWI = Picea wilsonii; PICR = Picea
crassifolia; JUPR = Juniperus przewalskii; PIFL = Pinus flexilis; PIAR = Pinus armandii;
PITA = Pinus tabulaeformis; TSCH = Tsuga chinensis; ABCH = Abies chensiensis
**
based on the reliable portion of each chronology (more than 6 tree-ring cores)
4
Keyan Fang et al.
Table S2 Clusters based on climate-growth response functions for temperature and
precipitation from previous May to current September. The ID and groupings (A-I) are shown
in Table 2.
Cluster Explained ID for each cluster
variance
1
Group B (SYKRWL XINLOL XINLML XINLOM XINLOH TULUGH
15.3%
TULGHM TULGLM TULOGL MOSIGH MOSIHM MOSILM
MOSIGL)
2
11.7%
Group D (DELINH DULAJP SHENJP DUSHJP WULANJ); SUNLZU
3
Group C (MIQAPS MIQBPS KUERPS TIANPS FUKBAI GOLQIA
11.1%
HUTXIA HUTSHI); Group I (YCHAPS YCHBPS)
4
Group F (GHEGAN, YINBPS); Group A (MQAXJP, MQBXJP
9.1%
HBHXJP, HBLXJP, HBMXJP)
5
9.0%
Group A (DEZQIN, GOUQIN, HEBQIN, LAJQIN, TDAXJP, TDBXJP)
6
Group A (MQDXJP, MQFXJP, MQRXJP); Group H (QUMAJP,
7.7%
ZHIDJP)
7
6.0%
Group C (BEQURU, HXBURU, XGSURU, ZEDURU)
8
5.4%
Group C (BIGKPS, KENGPS)
Others
DQHZHO BSIRWL JIALPS TIAANG TIALEN TIAZHA HUASPI
SANGTS BLKALS BLKBLS ZHANGX
5
Keyan Fang et al.
Table S3 Classifications for drought-growth responses.
Cluster Explained ID for each cluster
variance
1
MIQAPS MIQBPS JIALPS DELINH GOUQIN HEBQIN GHEGAN
DULAJP SHENJP DUSHJP MQAXJP MQBXJP MQDXJP MQFXJP
23.5%
MQRXJP TDAXJP TDBXJP HBLXJP HBMXJP HBHXJP HUASPI
YINBPS WULANJ QUMAJP ZHIDJP ZHANGX DQHZHO SYKRWL
MOSIGH MOSIHM MOSILM MOSIGL
2
KUERPS TIANPS YCHAPS BEQURU HXBURU XGSURU
18.1%
ZEDURU LAJQIN SANGTS XINLOL XINLML XINLOM XINLOH
TULUGH TULGHM TULGLM TULOGL HUTXIA TIAANG
others
BLKALS BLKBLS BIGKPS KENGPS YCHBPS SUNLZU BSIRWL
DEZQIN GOLQIA HUTSHI FUKBAI TIALEN TIAZHA
6
Keyan Fang et al.
Figure S1. Monthly total precipitation for some stations in NW China according to the
instrumental records since the 1950s. The Xining station is close to Group A, D and H and
shows the monthly precipitation pattern over that region, the Lanzhou and Zhongning stations
show precipitation diagrams of Groups B and E, the Wulumuqi and Yining stations indicate
distribution of monthly precipitation of Group C, the Xi’an station shows the monthly
precipitation of Group F, the Hami station displays the monthly precipitation of Group G, and
the Hetian station indicate precipitation patterns of Group I.
7
Keyan Fang et al.
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