IHOP
2002 Logbook Transcription: 5/24/02 – 6/3/02: Joseph Alfieri & Josh Uebelherr
1)
Site:
8
Date: 5/24/02
Arrive: 1505
Depart: 1625
Conditions: heavy overcast, light sprinkling rain,
light wind
Soil saturated with standing water up to
approximately 5cm in depressions.
This is due to severe storms the previous night.
Observers: JU/JA & Hatim Sharif
Maintenance: None
Measurements/Notes:
- Trime soil moisture
- Soil core taken
2)
Site:
Site 7
Date: 5/24/02
Arrive: 1645
Depart: 1733
Conditions: heavy overcast, light sprinkle turning
to moderate rain, very light wind.
While there is no standing water at this site the
ground is still very wet.
Observers: JA/JU, & Hatim Sharif
Maintenance: None
Measurements/Notes:
- Limited number of trime soil moisture
- Soil core taken
- Limited measurements taken due to approaching
severe weather (thunderstorms to the SSW)
3)
Site:
8
Date: 5/25/02
Arrive: 1145
Depart: 1535
Conditions: partly cloudy, light N wind
Observers: JU/JA & Hatim Sharif
Maintenance: Domes cleaned and level check at 13:49
to 13:52 CDT
Measurements/Notes:
- Surface IR temperature distribution with
vegetation height taken
- Soil appeared soaked, with standing water in the
field
- MSR data corrupted
-
Limited
Porometry taken; the high RH within the canopy coupled with wind gust resulted
in variable sensor chamber RH. The RH within the open chamber varied by as much
as 5-8% depending on winds. This may affect the quality of the measurements.
- Photographs taken
- Caught ‘Box Turtle’
4)
Site:
7
Date: 5/25/02
Arrive: 1600
Depart: 1758
Conditions:
Observers: JA/JU & Hatim Sharif
Maintenance: Radiometer domes cleaned 1752-1753 (no
significant debris)
Measurements/Notes:
- Remaining trime soil moisture taken on southern
transect
- MSR data corrupted
- Surface IR temperature distribution with
vegetation height taken
- Limited porometry taken;
- Photographs taken
- Snake caught, black with red speckles on side and
yellow stripe down back
5)
Site:
9
Date: 5/25/02
Arrive: 1845
Depart: 1954
Conditions: clear, no wind
Observers: JU/JA
Maintenance: None
Measurements/Notes:
- Trime soil moisture taken
- Soil core taken at 1910
- Limited surface IR temperature distribution with
vegetation height taken
- LAI taken
- MSR data corrupted
- Photographs taken
6)
Site:
8
Date: 5/25/02
Arrive: 2010
Depart: 2030
Conditions: clear, no wind
Observers: JA/JU
Maintenance: None
Measurements/Notes:
- LAI taken
7)
Site:
7
Date: 5/25/02
Arrive: 2045
Depart: 2055
Conditions: clear, no wind, great sunset and a
lovely full moon.
Observers: JU/JA
Maintenance: None
Measurements/Notes:
- LAI taken on western transect only due to sunset
8)
Site:
6
Date: 5/26/02
Arrive: 1515
Depart: 1830
Conditions: sunny, isolated clouds, light SSW wind
Observers: JA/JU, Peggy LeMone & Bob Grossman
Maintenance: None
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Porometry taken
- Photographs taken
- Soil cracked due to contraction from drying out,
~2 - 4mm in width
9)
Site:
5
Date: 5/28/02
Arrive: 0955
Depart: 1240
Conditions: partly cloudy, low convective clouds
present (~50 m high) likely due to significant soil moisture, very light SE
wind
Observers: JU/JA
Maintenance: None
Measurements/Notes:
- Soils appeared dark, apparently due to high
moisture content from recent precipitation
- Appeared to be ‘live’ insects on radiometer domes,
perhaps seeking leftover condensate from overnight dew.
- Soil core taken at 1027 approximately 5m west of
solar panel.
- Trime soil moisture taken
- Surface IR temperature distribution with
vegetation height taken
- MSR taken. Note that the sky is overcast, which
might influence the measurements.
- LAI taken
- Porometry taken. The leaves of the winter wheat
are beginning to show some curling and yellowing. Also the upper surface of the
leaves have small rust colored spots covering them.
- Photographs taken
10)
Site:
4
Date: 5/28/02
Arrive: 1250
Depart: 1330
Conditions: partly cloudy turning to heavy overcast,
severe thunderstorms approaching from the SE with light winds increasing to
heavy winds from SE
Observers: JA/JU
Maintenance: None
Measurements/Notes:
- Limited MSR taken (8 points along west and south
transect) due to intermittent sun through clouds (direct sun required)
- Limited surface IR temperature distribution with
vegetation height taken (field view of flux tower IR instrument)
- Limited porometry taken along transects;
measurement was aborted due to rain.
- Left site before all measurements taken due to
approaching severe weather
- Photographs of approaching storm taken
11)
Site:
10
Date: 5/28/02
Arrive: 1630
Depart: 2030
Conditions: mostly sunny, light SSE wind
Due to recent rains, the grass, which had appeared
to be brown and dead, shows signs of greening up somewhat in places at this
site.
Observers: JU/JA
Maintenance: Radiometer domes and krypton cleaned at
1916
Data downloaded from flux station
Start
location: 50981
End
location: 109061
Measurements/Notes:
- Soil core taken at 1920. Core extracted 5m from
the fence due west of the flux station.
- Trime soil moisture taken
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Photographs taken
- Due to experience on this day at site 10 and at
other sites with short vegetation, LAI instrument reset to accept rather than
reject values equal to or greater than above canopy value. This will allow true representation of areas
with 0 LAI (i.e. bare spots on ground).
So, LAI value for this day and all previous did not include values from
bare spots in the average and we may consider recalculating LAI for sites with
short vegetation later (i.e. 2, 3, 4, 7, 8, 9, &10), using a value of 0 for
all LAI calculations that used less than 4 values to generate the average LAI
value. In other words, if only 3 values were used to calculate the average LAI,
add 0 in to bring the number of values used for average LAI to 4 in order to
adjust the LAI down to account for ‘bare spots’ that the instrument was
previously throwing away.
12)
Site:
2
Date: 5/29/02
Arrive: 0830
Depart: 1140
Conditions: clear, light SW wind
Observers: JA/JU
Maintenance: Radiometer domes cleaned at 1134
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Porometry taken
- Photographs taken
13)
Site:
1
Date: 5/29/02
Arrive: 1208
Depart: 1405
Conditions: clear, light NW wind
Observers: JU/JA
Maintenance: Radiometer domes cleaned at 1235
Checked wiring of the soil profiler into the
datalogger/multiplexer for loose connections from 1210 to 1230.
Measurements/Notes:
- Soil core taken at 1250 approximately 15m west of
tower. The plowed soil is so loose and spongy that it collapses when the corer
is driven into the ground. Because of this, only two levels could be discerned
0-5cm and 5-8cm.
- Trime soil moisture taken
- Surface IR temperature distribution taken
- MSR taken
- Photographs taken
- No vegetation present, only bare soil
14)
Site:
3
Date: 5/29/02
Arrive: 1505
Depart: 1900
Conditions: mostly sunny, light SW
Observers: JA/JU
Maintenance: Radiometer domes cleaned at 1614
Measurements/Notes:
- Soil core taken at 1515 on the west side of the
site just outside the electric fence.
- Trime soil moisture taken
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Porometry taken – began to have unstable readings
with porometer
- Photographs taken
15)
Site:
3
Date: 5/30/02
Arrive:0553
Depart: 0800
Conditions: clear, light S breeze, great sunrise
Observers: JU/JA
Maintenance: None
Measurements/Notes:
- Attempted diurnal profile of stomatal conductance
and trime soil moisture, however porometer failed to record stable
measurements, therefore sampling aborted
16)
Site:
4
Date: 5/30/02
Arrive: 1235
Depart: 1600
Conditions: clear, light S wind
Observers: JA/JU
Maintenance: None
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken at 1250 5m west of
radiometer sawhorse
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Photographs taken, including the sudden change of
vegetation from S to N that the flux tower straddles
17)
Site:
7
Date: 5/31/02
Arrive: 1345
Depart: 1600
Conditions: clear, light SSW breeze
Observers: JU
Maintenance: None
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken
- MSR taken
18)
Site:
8
Date: 5/31/02
Arrive: 1625
Depart: 1645
Conditions: clear, light S wind
Observers: JU
Maintenance: None
Measurements/Notes:
- MSR taken
19)
Site:
9
Date: 5/31/02
Arrive: 1721
Depart: 1930
Conditions: clear, light SSW breeze
Observers: JU
Maintenance: None
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken
- MSR taken
20)
Site:
8
Date: 5/31/02
Arrive: 1954
Depart: 2039
Conditions: clear, light S breeze
Observers: JU
Maintenance: None
Measurements/Notes:
- Soil core taken
- Trime soil moisture taken
21)
Site:
7
Date: 6/1/02
Arrive: 1411
Depart: 1607
Conditions: clear, light S wind
Observers: JA/JU
Maintenance: Radiometers cleaned at 1606
Measurements/Notes:
- Surface IR temperature distribution with vegetation
height taken
- MSR taken
- LAI taken
- Photographs taken
22)
Site:
8
Date: 6/1/02
Arrive: 1642
Depart: 1745
Conditions: clear, moderate S wind
Observers: JU/JA
Maintenance: Radiometer domes cleaned 1652-1654
Measurements/Notes:
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Photographs taken
23)
Site:
9
Date: 6/1/02
Arrive: 1818
Depart: 1921
Conditions: clear with a moderate wind from the SSW
Observers: JA/JU
Maintenance: Radiometer
domes cleaned 1820-1822
Measurements/Notes:
- Surface IR temperature distribution with
vegetation height taken
- MSR taken
- LAI taken
- Photographs taken