 | |
Updated March 1, 2000
1998 Summary for Canopy Bidirectonal Reflectance and Related Field Measurements
in Native Tallgrass Prairie and Wheat Ecosystems in Oklahoma
Canopy & Soil Reflectance
|
| Date |
Day of Year |
Apparent Solar Zenith Angles (degrees) |
Photos |
| Wheat Site (36.77 N, 97.13
W) |
| May 13, 1998 |
133 |
55, 40, 35, 25, 18 |
X |
| May 28, 1998 |
148 |
49.5, 45, 35, 25 |
X |
| Tall Grass Prairie (36.93
N, 96.68 W) |
| May 28, 1998 |
148 |
28, 35, 45, 55 |
X |
| June 23, 1998 |
174 |
15, 25, 35,45, 55 |
X |
| July 17, 1998 |
198 |
53, 45, 35, 25 |
X |
| August 16, 1998 |
228 |
55, 45, 35, 25 |
X |
|
September 3/4, 1998
|
246/247 |
Canopy: 35, 45, 55 / Soil: 35,45,55 |
X |
|
October 7, 1998
|
280 |
55, 45 |
X |
Leaf Optical Properties |
| Date |
Day of Year |
Species or Plant Element |
| Wheat Site |
| May 13, 1998 |
133 |
Green leaves, Brown leaves, Grain head |
| May 28, 1998 |
148 |
Brown leaves, Green stem, Grain head |
| Tall Grass Prairie |
| May 28, 1998 |
148 |
Leaves: Indiangrass, Wild alfalfa, Goldenrod,
Milkweed |
| June 23, 1998 |
174 |
Leaves: Indiangrass, Wild alfalfa, Goldenrod,
Milkweed, Switchgrass, Little bluestem |
| July 16, 1998 |
197 |
Leaves: Indiangrass, Wild alfalfa, Goldenrod,
Milkweed, Switchgrass, Little bluestem |
| August 16, 1998 |
228 |
Leaves: Indiangrass, Goldenrod, Switchgrass,
Little bluestem |
| September 3, 1998 |
246 |
Leaves: Indiangrass (brown), Switchgrass (brown and green), Little
bluestem (green) and Goldenrod (green) |
| October 7, 1998 |
280 |
Leaves (green): Indiangrass, Switchgrass, Little bluestem and Goldenrod |
fAPAR
|
| Date |
Day of Year |
Measurement Period (Local Time) |
| Wheat Site |
| May 13, 1998 |
133 |
900-1800 |
| May 28, 1998 |
148 |
600-1300 |
| Tall Grass Prairie |
| May 28, 1998 |
148 |
1445-1800 |
| June 22, 1998 |
174 |
1000-1800 |
| July 17, 1998 |
198 |
600-1400 |
| August 16, 1998 |
228 |
600-1600 |
| September 3/4, 1998 |
246/247 |
1515-1330 |
| October 7, 1998 |
280 |
800-1500 |
|
