Field Notes

<--2018-01-23 13:30:00 | 2018-02-13 11:10:00-->
Other sites visited today: East End | West Pond | Bouldin Corn | Sherman Wetland | Mayberry
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Twitchell Alfalfa: 2018-01-31 09:30:00 (DOY 31)
Author: Daphne Szutu
Others: Elke, Kyle, Rory French

Summary: Regular data collection/cleaning, soil respiration, spectral, veg height

2018-01-31
Twitchell Alfalfa

We arrived at 9:30. It was sunny, hazy, and cool. There were many geese on the fields east of the tower.

Elke cleaned rad sensors and took spectral measurements. Rory took veg height measurements. Kyle did soil respiration. He removed some grass plants from collar 5 before measuring soil respiration, which disturbed soil in the process. There was a high humidity warning; the ground was pretty wet.

I collect met, soil CO2, camera, and USB GHG data. I cleaned the 7500, which had a lot of dew. I removed the golden HMP60 sensor (sn G4540021 came down). I updated the CR1000 met program to reflect the removal of the golden HMP60 sensors. The current program is AlfalfaTowerMet_20170510.CR1. I checked the data afterwards and the numbers looked reasonable.

LI-7500 readings:
CO2 285 ppm --> 437 after cleaning
H2O 1070 mmol/m3 --> 472 after cleaning
T 13.5 C
P 102.2 kPa
SS 31 --> 104 after cleaning

We left at 10:15.

0 photos found

Graphs display:
7 sets found

Can't check TA_met
11 TA_met graphs found

Explore the graph:Alfalfa Temperatures in a new window

Explore the graph:Alfalfa Soil Heat Flux in a new window

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Explore the graph:Alfalfa Soil Temperatures Set B in a new window

Explore the graph:Alfalfa Soil Temperatures Set C in a new window

Explore the graph:NDVI Narrow Band Radiation in a new window

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Can't check TA_rad
3 TA_rad graphs found

Explore the graph:Alfalfa Radiation in a new window

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Can't check TA_flux
5 TA_flux graphs found

Explore the graph:Alfalfa Sonic Wind in a new window

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Can't check TA_soilco2
7 TA_soilco2 graphs found

Explore the graph:Set A Soil CO2 in a new window

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1 TA_arable graphs found

Explore the graph:Temperatures in a new window

1 TA_cam graphs found

Explore the graph:GCC in a new window

Can't check TATWBABCSB_cam