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CZO
N-S transect of research catchments
Main CZO site
Wolverton
Last Chance
Sugar Pine
Gin Flat
MODIS Image
Wireless Sensor Network/ Water balance instrument cluster
Figure _. Sensor node architecture: (1) mote, (2) custom data-logger to interface the sensor array, (3) on-site memory storage, (4) 12V battery, (5) snow-depth sensor, (6) humidity and temperature sensor, (7) solar radiation sensor, (8) 10W solar panel, (9) external 8dBi antenna, (10) four soil moisture, temperature, and matric potential sensors at varying depths.
Water balance instrument cluster components
Figure _. Current layout of the SSCZO wireless sensor network.
Wireless Sensor Network/ Water balance instrument cluster
Figure _. Variability of catchment-wide parameters for WY2010: a) average depth snow depth, b) soil moisture ad varying depths.
Figure _. Mean and variability of snow depth, and VWC on four survey dates. Measurements are shown as grey circles (except for the large number of points in the LIDAR data set). The line denotes the mean; the dark region denotes one standard deviation, and the light region denotes the standard error of the mean.
CZO
N-S transect of
research catchments
Main
CZO site
6001200180024003000
Elev., m
San Joaquin Experim
ental Range400 m
Shorthair Creek
2700 mCZO
P301
2000 m
Soaproot Saddle1100 m
E-W transect of flux tow
ers
Win
ter co
ld lim
ited
Temp
erature
Year-ro
un
d
gro
win
g seaso
nS
um
mer
dro
ug
ht lim
ited
Gro
win
g
seaso
n
Increa
sing
Eleva
tion
Water
availab
ility
ET based on transect of CZO flux tow
ers
300350
400450
500550
600650
7000
100
200
300
400
500
600
700
Day since 1/1/09
Cumulative Et (mm)
Subalpine forest (8900')
Midm
ontane forest (6600')O
ak/Pine w
oodland (1300')
Cumulative evapotranspiration
Mid
mo
nta
ne fo
rest –
year ro
un
d E
T resu
lts in
hig
h an
nu
al ET
Su
ba
lpin
e fores
t –
min
imal E
T in
win
ter red
uces
ann
ual E
T
705030100
Cumulative ET, cm
fallw
interspring
summ
er
20 40 60
M. G
ou
lde
n,
ma
nu
script in
p
rep
ara
tion
Figure _. Sap flow compared to canopy top air temperature and carbon flux for late August 2010.
M. Goulden
O N D J F M A M J J A SD J F M A M J J A S
Catchment-scale water balance
Bales et. al, submitted
Average w
ater-balance components for W
Y 2009
Bales et. al, submitt
ed
Liu et. al, submitt
ed
Ion concentrations and discharge for Providence and Bull catchments for WY2004-2007