238
a
b
c
Day
time
Night
time
Physical factors due to temperature difference
Day time
Sediment temperature>Air temperature
Sensible heat flux
CO
2 flux: emission
Night time
Sediment temperature Sensible heat flux CO
2 flux: absorption
Factors of photosynthesis of plants
Day time
Sediment temperature Latent heat flux: emission CO
2 flux: absorption
Water vapor moves to the sky
Plant activity is small
July 2015
Influence of rainfall period
Novembar 2014 Febrary 2015
Plant wither period
CO
2 absorption
in day time
CO
2 emission
in day time
No time fluctuation
heat
chill
Air
Air
latent
heat
CO
2
Day
time
Night
time
Day
time
heat
chill
Fig. 8.6 Diagram showing characteristics of the air–salt marsh CO
2 flux at the river-mouth site (Otani and Marikawa 2017). (a) Group A, (b) Group B, (c)
Group C
S. Otani and T. Endo