$B2P@18=>]O@(B: $B2P@1Bg5$$NAH@.(B

$BCO5eN.BNEEG>6f3ZIt(B

1996 $BG/(B 5 $B7n(B 24 $BF|(B

$BL\

• $B2
• $B2P@1Bg5$$NAmNL(B
• $B2
• $BJ|
• $B;29MJ88%(B

$B35MW(B:

$B2P@[email protected],$r354Q$9$k(B.

$B2

$B%P%$%-%s%0(B1$B9f(B, 2mail protected],$NJ,@O$Ol$r$+$1$FAvO)$r6J$2(B, $BJ,;R$N $B%P%$%-%s%0$N200$B$G$"$k(B. $BJ,2rG=$OJ,;RNL$,(B200$B$N$H$3$m$G(B, $1/200$$B$G$"$k(B. (Owen et al,1977)

$B2P@1Bg5$$NAmNL(B

$B$3$3$G$O$*$*$^$+$K2P@1Bg5$$N

$$p = \int \rho g dz$$

$B$,F@$i$l$k(B. $B$3$3$G(B, $p$ $B$OCOI=LL5$05(B, $\rho$ $B$OBg5$$NL)EY(B, $g$ $B$O=ENO2CB.EY(B, $z$ $B$OBg5$$N9b$5$r$"$i$o$9(B. $B2>$K2P@1Bg5$$N6JN($H=ENO$NJQ2=$rL5;k$G$-$k$J$i$P(B,

$$S \int \rho dz = M$$

$B$,@.$jN)$D(B. $B$?$@$7(B, $S$ $B$O2P@1$NI=LL@Q(B, $M$ $B$O2P@1Bg5$$N

$$M = S \frac{p}{g}$$

$B$,F@$i$l$k(B. $BCOI=LL5$05$,(B6mb(600 [Pa])$B$@$H$7$F(B, $S$, $g$ $B$NCM$rBeF~$9$k$H(B

$$M = 4 \pi (3.4 \times 10^6)^2 \times \frac{600}{3.72} = 2.34 \times 10^{16} \ \ \ \ {\rm [Kg]}$$

$B$,F@$i$l$k(B. $B2P@1$NBg5$$,A4$F(BCO$_2$$B$@$H$9$k$H(B, $BF@$i$l$?CM$O(B $5.32 \times 10^{17}$ [mol] $B$KAjEv$9$k(B.

$B2

$B5$BN(B	$B=ENLHf(B
${\rm CO}_{2}$	95.32%
${\rm N}_{2}$	2.7%
Ar	1.6%
${\rm O}_{2}$	0.13%
CO	0.07%
${\rm H}_{2}{\rm O}$	0.03%
Ne	2.5ppm
Kr	0.3ppm
Xe	0.08ppm
${\rm O}_{3}$	0.04$\sim$0.2ppm

(Owen,1992)

$BJ|

$BF10LBNHf(B	$BCO5e(B	$B2P@1(B
$^{12}{\rm C}/^{13}{\rm C}$	89	90$\pm$5
$^{16}{\rm O}/^{18}{\rm O}$	489	490$\pm$25
$^{14}{\rm N}/^{15}{\rm N}$	272	170$\pm$15
$^{36}{\rm Ar}/^{38}{\rm Ar}$	5.3	5.5$\pm$1.5
$^{40}{\rm Ar}/^{36}{\rm Ar}$	296	3000$\pm$500
$^{129}{\rm Xe}/^{132}{\rm Xe}$	0.97	2.5
${\rm D}/{\rm H}$	$1.5\times 10^{-4}$	$(7.7\pm 0.3)\times 10^{-4}$

(Owen,1992)

$B;29MJ88%(B

Carr, M.H. 1996: Water on Mars, Oxford Univ. Press, 229pp.

$BA0ED(B $BC3(B, 1982: $BB@M[7OOG@14D6-$NJ*M}3X(B, $B6&N)=PHG(B.

Owen, T. et al., 1977 : The composition of the atmosphere at the surface of Mars, J. Geophys. Res., 82, 4635-4639.

Owen, T. 1992 : Composition and early history of the atmosphere, Mars (Kieffer, H.H. et al., eds), University of Arizona Press, Tucson, pp.818-834.

$B

$BK\9F$O(B 1989 $BG/$+$i(B 1993 $BG/$KEl5~Bg3XCO5eOG@1J*M}3X2J$G9T$o$l$F$$$?(B, $BN.BNM}O@%;%_%J!<(B, $B5Z$S(B 1996 $BG/$K9T$o$l$F$$$?(B $B8GBN2P@1%;%_%J!<$G$N%;%_%J!<%N!<%H$,$b$H$K$J$C$F$$$k(B. $B86:nHG$O@PEO@5]O@!W(B (1989/05/19) $B$G$"$j(B, $BNS>M2p$K$h$C$FCO5eN.BNEEG>6f3ZItHG!V2P@18=>]O@!W(B $B$H$7$F=q$-D>$5$l$?(B (1996/06/23). $B$=$N8e>.9b@5;L$K$h$C$F2CI.=$@5$5$l$?(B (1996/11/13). $B9=@.$H%G%P%C%0$K6(NO$7$F$/$l$?%;%_%J!<;22C $BK\;q8;$OCx:nZL5@UG$86B'(B).

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$$\mbox{dcstaff@gfd-dennou.org}$$

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