Remote sensing of environment and disaster laboratory

Institute of Industrial Science, the University of Tokyo, Japan

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8 T . H I R A N O et al.
Table 3 Annual sums of NEE, RE, and GPP

decrease undstomatal closu
NEE
REGPPby smoke fro(gC m!2(gC m!2(gC m!2Annual*2007, 2009),
Site
periodyr!1)
yr!1)
yr!1)
water stress iæøċČ7ĊÃûĚ{7ċĊ-ĒěąïĚkuċ¤ô´ùě?yĊaùěĚÆĝ^AûĚĀĔĊ C¯fóĘ³ùěĀËzÆćyĨĺĦĉĈĝïĀè{7ċUF
04–05
20937213512
tion had shCO2aČ7zôôĚćĊ; ûĚćĘěąòęçþċaÆČ,VĊėĚrċ.)Æĝ3ĚĀĔ7i"Ģĥ\2ÐĊMÎĝ(đûèĊÈô®ĜěĀğĹĪ
05–06
7236263554
decrease und
06–07
443
3736
3293
ĬģĞĊòïą7zôúąïĚĀĔøċČçğĹĪĬģĞċ{7Ċò÷Ě Å"¤ċaÆċ7³óĘeĘóĊĉăĀ7zćaÆċÊKĝïąğĹĪĬģĞwas probably
07–08
!27
3485
3512
radiation. As
9ċ Å"¤aÆĝ^AúĀè É}!ċMÎČ\z¼óĘċ»ÌóĘ¶ ùěĀè
Average ± SD
174 ± 203 3642 ± 115 3468 ± 118
and RE incr
DF
02–03
555
3656
3101
2
(r= 0.50–0.8
03–04
443
3664
3221
!0.46 and 0.0
04–05
497
3671
3174
sites. On an
05–06
202
3506
3304
æ{7ćČÇïgÉĝó÷ąqěĀrôîĒę´ùěüĒăąĆõĚ67ċøćĆçkuĝ>ö-ēè{7ôLVùěĖûï7ships were fo06–07
504
3548
3044
9Čzô>öąIĕ´úĊöïm ċ:WĆîęçñč#vĖĸģĞĉĈċÑ§I79ĊþċńôEúçFċn$ĞĤĞ79
07–08
107
3351
3244
the UF and D†± SD
328 ± 204 3519 ± 132 3191 ± 112
from !0.25 t
Ċĕ?²tċ{7ôEúąïĚèĊ{7Č¤ĝ>öº­úąïĚĀĔ7i"ĝ½ûĚ+«RĝYĄS¢ģĥħİćúą DB Average
04–05
591
1662
1071
respectively,|ùěąïĚèúóúçjÀČª7"ĉĈċ É}!ĊėĚ67ÈĆ{7ċ7zôôęç{Ċ-ĒěąïĀ¤ôÅ"úç
05–06
422
1775
1353
tionship of a06–07
513
1871
1358
&'(ļ Å"¤Ľĝ>öaúąïĚćZ_ùěąïĚèúóúç{7Ċò÷Ě Å"¤)`Čeĉô>ïĆîĚè
between GW
07–08
468
1840
1372
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the relationsh
08–09
318
1746
1428
mean GWL b
Average ± SD† 499 ± 72
1787 ± 92
1289 ± 145
and 79 gC m
ļ\z¼ċXĽ%æ øċČğĹĪĬģĞċ{7Ċò÷Ě7DB site.
*From DOY192 to DOY191 in the following year.

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0.Æçrċ,VÆçĒĀ ĊėĚCO2aÆô-Ēěąòęç 3ČĊ{7ċ\z¼ċXćþěĊð7zċĝ©Uúą Å"¤aÆċ; ĝ^AúĀè†Average and a standard deviation (SD) for 4 years from04–05 to 07–08 periods.

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UF and DF sites. On the other hand, a linear relationshipexisted in the DB site. When GWL rose abovegroundunder flooding, RE decreased sharply at the UF and DBsites. Such a drastic decrease under floodwater was also
found in soil respiration at the UF site (Sundari et al.,2012). Figure 5 shows the relationships between daily
CO2 flux and GWL on a monthly basis after gap filling.
As for RE, the shapes of the relationships were similar
with those in Fig. 4, in which measured REs were plotted. This similarity suggests the reliability of gap filling.
The GPP showed significant quadratic relationships
with GWL (r2 = 0.20–0.26), which indicate that GPP
peaked when GWL was !0.29, !0.72, and !0.31 m,
respectively, at the UF, DF, and DB sites. The GPP

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ĿĽJE?%JK@B><EI%U>R>:"E%HE<>@#I%HE<#)KRE%N>A>B>I%YE$:#%YK:E@I%>@B%JKZEB#%DEAE@I%[O\;]$%#^%L<#K@BZ>$;<%C;=;C%#@%:#EC%<;:!E<>?#@%E@%$<#!E]>C%!;>$%:Z>A!%^#<;:$:,_I%`#K<@>C%#^%PL<E]KC$K<>C%X;$;#<#C#L)I%.1F(GI%!!,-(-0-86I%(+-(,%%%ŀĽHE<>@#%U>R>:"EI%H;@B<ER%J;L>"I%YE$:#%YK:E@I%JKZEB#%DEAE@I%HEB;@#<E%U>R>">:"EI%>@B%XE$:K<K%#:>REI%(+-(,%O\;]$:%#^%BE:$K<9>@];:%#@%$";%]><9#@%9>C>@];%#^%$<#!E]>C%!;>$%:Z>A!%^#<;:$:,%SC#9>C%&">@L;%aE#C#L)I%-1F--GI%!!,%86-+086((,ææ%%8ĽÓT>$><K%UPYOb&HcI%U>R>:"E%HE<>@#I%W>@E@%P@LL<>E@E%>@B%'<9E$>%3#:ZE@?><?I%(+-+,%O:?A>?#@%#^%L<#K@B%Z>$;<%$>9C;%>$%^#<;:$;B%!;>$C>@B%E@%Y>CEA>@$>@%K:E@L%B<#KL"$%E@B;/%$#Z><B:%ZECBd<;%]#@$<#C,%P:E>%]#@^;<;@];%#@%<;A#$;%:;@:E@LFP&3J%(+-+G,For further details, contact: Haemi PARK, Ce-506, 6-1, Komaba 4-chome, Meguro, Tokyo 153-8505 JAPAN (URL: http://wtlab.iis.u-tokyo.ac.jp/ E-mail: hmpark@iis.u-tokyo.ac.jp)