Self Introduction
Shunsuke Tei
From Japan
Green Network of Excellence (GRENE) !
Arctic Climate Change Research Project (ACCRP)
funded by the Ministry of Education, Culture, Sports, !
Science and Technology-Japan Career
l 2004-2008
Undergraduate Program!
Hokkaido University, School of Science
l 2008-2010 Master’s Program!
Hokkaido University, Graduate School of Env. Science l 2010-2013 Doctoral Program!
Hokkaido University, Graduate School of Env. Science
ü Research Fellowship for Young Scientists form JSPS (2011-2013) !
l 2013~ Project Researcher (GRENE-ACCRP)!
Hokkaido University, Graduate School of Env. Science!
National Institute of Polar Research
Research Interest
Reconstruction of past carbon and !
water cycle in pan Arctic region •  They enable us!
–  to better understand the !
underlying mechanisms of !
changes in carbon and water !
cycles.!
–  to better predict trends and/or !
variability in future cycles.!
My speciality;!
Isotope dendrochronology ü Reconstructing environmental changes and tree response !
to climate changes using tree-ring width and isotope ratios Reconstructing environmental changes 200
1970
(a)
1980
1990
2000
(b)
r = -­‐0.90
250
200
150
150
100
100
50
50
0
-25
-24
-23
-22
SWE 0-60cm (mm)
SWE 0-60cm (mm)
250
Year (AD)
• Reconstruction!
• Observation!
• Model（２LM）!
（Yamazaki et al., !
Hydrol. Processes, 2007)
0
-21
180
(c)
Yakutsk
140
100
Year (AD)
Tei et al., (2013), JGR.!
2010
2000
1990
1980
1970
1960
1950
1940
1930
1920
60
1910
SWE0-60cm (mm)
LE δ13C (‰)
Reconstructing tree response !
to climate changes
1.5 Yakutsk: Low precipitation
Tree-ring width (mm)
1.0
#1
#3
#4
#2
0.5
0.0
-27％
Cool Hot
Higher temperature !
reduce larch tree growth!
in eastern Siberia
2.5 Elgeeii: Large precipitation
1.5
#1
#3
#2
#4
-34％
0.5
Yakutsk
Elgeeii
1911 1931 1961 1991
-1930 -1960 -1990 -2011
Tree growth period
Tei et al., in press, Polar Science!
GRENE-ACCRP
ü Research Project (2)!
Change in the terrestrial ecosystems of the pan-Arctic !
and it’s effect on climate!
Fort Smith
I.  Fort Smith; Picea glauca! Inuvik
Estonia II.  Inuvik; Picea mariana!
III.  Estonia; Pinus sylvestrisd!
!
I.  Chokurdakh; Larix gmerinii!
Chokurdakh
II.  Yakutsk; Larix cajanderi!
Yakutsk
III.  Elgeeii; Larix cajanderi
Elgeeii
ü Reconstructing environmental changes and tree response !
to climate changes using tree-ring width and isotope ratios!
Thank you !
for attention！！