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