Field Notes

Sherman Barn: 2019-01-18 09:15:00 (DOY 18)
Author: Daphne Szutu
Others: Dennis, Kuno, Camilo, Jiangong

Summary: Regular data collection/cleaning, spectral, nice grass on fields, 4-way radiometer PRT bad

2019-01-18
Sherman Barn

Dennis, Kuno, Camilo, Jiangong, and I arrived at 9:15. It was overcast and foggy, but mild. The grass was green and beautiful. There were some ponds in our footprint (some bubbles in the puddles) and some distant patches of white swans/geese on the field. Kuno observed that the ditch water east of the tower had a reddish tint and an oily sheen b/c of iron-reducing bacteria.

Dennis took spectral and veg height measurements. For spectral, he took reference/dark at the beginning and at the end and then up/down pairs (one measurement was an accidental reference instead of sample); he took mostly grass samples with one water sample at the end.

I downloaded met, camera, and USB data. Kuno cleaned the flux and rad sensors. The wash reservoir was full, which was unexpected (I forgot to check the wash/spin cycle).

After looking at the data in the lab, the NR01 4-way radiometer PRT temperature is bad after our last site visit on 2019-01-03 9:30. LWin/LWout will need to be re-calculated with another temperature.

LI-7500 readings:
CO2 448ppm
H2O 560ppm
T 12.4C
P 102kPa
SS 103--> 103 after cleaning

LI7700 readings:
CH4 2.5ppm
RSSI 13--> 71 after cleaning

We left at 9:50.

Veg Height (cm): Tape measure from ground to top of plant - Measured by DDB. Green grass, super nice.
24, 17, 9, 14, 14, 11, 12, 12, 11, 22, 21, 9, 6, 7, 7, 6, 7, 21, 11, avg = 12.7, stdev = 5.76

0 photos found

3 sets found

4 SB_flux graphs found