Local-Scale Observation Site (LSOS) Snow Measurements

February 2002 - IOP1

March 2002 - IOP2

February 2003 - IOP3

March 2003 - IOP4

Janet Hardy, ERDC-CRREL28 May 2003

Danny Marks

Tim Link & Richard Essery

Aled Rowlands

John Pomeroy

Co-Investigators

Snow Pit Measurements 2002 - 2003

•Three Snow Pits per day.–Dense pine–Open pine–Clearing

•Same protocol, same tools… plus wetness.

0

10

20

30

40

50

60

70

80

90

100

1

17

33

49

65

81

97

11

3

12

9

14

5

16

1

17

7

19

3

20

9

22

5

24

1

25

7

27

3

28

9

Point

Sn

ow

De

pth

(c

m)

23-Feb-02

27-Mar-02

30-Mar-02

Dense Pine

Open Pine

Snow Depth Surveys – 2002IOP 1 and IOP 2

Snow Depth and SWE Surveys 2003IOP 3 and IOP 4

•Three Snow Depth Surveys –February 19th – 20th –March 24th – 25th –March 28th

•Four SWE Surveys–February 19th – 20th –February 23rd –March 26th –March 30th

Snow Depth Transects 2003

0

20

40

60

80

100

120

140

160

1 21 41 61 81 101 121 141 161 181 201 221 241 261 281 301

Point

Sn

ow

Dep

th (

cm)

19 - 20 Feb.

24-25 March

28-Mar-03

Dense Pine Open Pine

SWE Transects 2003

0

50

100

150

200

250

300

19-20 Feb.2003

23 Feb. 2003 25-26 Mar.2003

30 Mar 2003

Date

SW

E (

mm

)

Dense Pine

Open Pine

Standard Deviation Bars

Potential Applications for High Resolution Snow Data at LSOS

Daily TB change - 18.7 GHz

230

240

250

260

270

280

0:00 2:24 4:48 7:12 9:36 12:00 14:24

Time

Bri

gh

tnes

s T

emp

erat

ure

[K

]

18.7 GHz V

18.7 GHz H

SWE?Wetness?Density?

Grain Size?

Model Development and Validation

Scaling of Processes, Measurements and Models

0

20

40

60

80

100

120

140

160

1 21 41 61 81 101 121 141 161 181 201 221 241 261 281 301

Point

Sn

ow

Dep

th (

cm)

19 - 20 Feb.

24-25 March

28-Mar-03

Dense Pine Open PineNESTED STUDY AREASNESTED STUDY AREASNESTED STUDY AREASNESTED STUDY AREAS