# IHOP 2002 Logbook Transcription: 5/10/02 - 5/23/02: Josh Uebelherr & Joseph Alfieri

1) Site 3: 5/10/02

Arrival: 1015

Departure: 1600

Conditions: heavy overcast, very windy

-Site 3 PAM station radiometers cleaned with ‘kim wipes’ at 1315 – domes intact, net radiometer level, and all domes relatively free from debris though some dust was on surface.

-CU flux station (for site 10) placed at site 3 for cross calibration approximately 35 m WSW (221 degrees) of the site 3 PAM station (elevation of CU station placement approximately 1m lower elevation than site 3 PAM station).

-The sonic anemometer and krypton hygrometer on the CU flux station oriented to face true north per the instruction of Dr. Blanken. However, since the dominant winds in the region are from the south, when the tower is relocated to Site 10 these instruments will be oriented facing east. The pyrometer and net radiometer are facing south and the IR thermometer is monitoring surface temperature to the southeast of the tower.

- The soil measurements associated with the CU flux station are taken such that the CS615 probes collect soil moisture content at 5, 7.5, and 15cm; the pair of soil heat flux plates are placed on either side of the CS615s at a distance of 10cm from center and at a depth of 5cm; the soil temperature probe (not functional) is placed directly above the column of CS615 at a depth 2.5cm. The entire collection of sensors is located to the south west of the tower just outside the view of the net radiometer.

-CU flux station soil temperature sensor not functional due to missing resistor.

2) Site 3: 5/11/02

Arrival: 1000

Departure: 1140

Conditions: partly cloudy, windy

-Soil heat flux sensor 1 connection loose, therefore no data logged for that parameter for the preceding 24 hours. Cause: loose wire, corrected by Joe Alfieri

-Soil temperature probe 10 Ohm resistor installed, probe still not functional. Cause: 100 Ohm resistor required instead of 10 Ohm resistor -> to be installed on 5/18/02 when CU flux station is moved to Site 10.

-CU flux tower net radiometer leveled, pyrometer leveled, and surface IR temperature sensor knob adjusted 100% clockwise for proper adjustment of emissivity of 1.

-Photographs taken of both Site 3 PAM flux station and CU flux station as well as Site 3 landscape in 4 cardinal directions.

3) Site 9: 5/14/02

Arrival: 1535

Departure: 1930

Conditions: mostly sunny, light wind

-2 land surface characterization transects selected

(i) Western transect begins approximately 20m west of PAM radiometer instrumentation and extends for 20m – beginning and end of transect marked with blue flags

(ii) Southern transect begins approximately 20m south of PAM radiometer instrumentation and extends for 20m – beginning is marked with a blue flag and end is marked with a green flag

-Assistance provided to Tom Horst to lower flux station mast for service

4) Site 6: 5/15/02

Arrival: 1200

Departure: early afternoon

-No maintenance or measurements performed, only visited site for survey with David Yates to discuss surface characterization sampling method

5) Site 7: 5/15/02

Arrival: mid-afternoon

Departure: mid-afternoon

-No maintenance or measurements performed, only visited site for survey with David Yates to discuss surface characterization and sampling method

6) Site 9: 5/16/02

Arrival: 1017

Departure: 1400

Conditions: heavy overcast, moderate SE winds

-Radiometers cleaned at 1318, relatively free of debris prior to cleaning though some dust present

- One of the thin black wires leading to Profiler 9 found to have a cut in the sheathing. The wire was repaired and flagged with electrical tape. Additionally, one of the heavy black wires leading to profiler 9 was found to be severed and could not be repaired.

- One of the thin black wires leading to Profiler 8 was found to have a cut in the sheathing. The wire was repaired and flagged with electrical tape.

-Surface characterization measurements taken:

(i) IR surface temperature distribution with vegetation height in field of view of Site 9 flux station IR temperature instrument

(ii) IR surface temperature distribution with vegetation height in field of view of Site 9 flux station IR temperature instrument; 4 samples taken at two different times

(iii) Gravimetric soil core taken at 1122 approximately 5m west of radiometer instrumentation just outside perimeter of ‘cow fencer’ next to the fourth ‘cow fencer’ post from the right of the fencer entrance gate.

(iv) IR surface temperature distribution with vegetation height taken on western transect every 5m for 20m including endpoints

(v) IR surface temperature distribution with vegetation height taken on southern transect every 5m for 20m including endpoints

(vi) Leaf area index measured along the western transect every 5m for 20m including end points.

(vii) Leaf area index measure along the southern transect every 5m for 200m including the endpoints.

(viii) Trime measurements taken next to each of the soil profilers and the site where the soil core was taken.

(ix) Trime measurements taken along the western transect every 5m for 20m including endpoints.

(x) Trime measurements taken along the southern transect every 5m for20m including the endpoints.

(xi) Photographs of the site taken in each of the cardinal directions; additional images of selected vegetation taken.

(xii) MSR could not be collected due to heavy overcast weather conditions.

(xiii) Representative plants for porometry chosen within the fencer; vegetation along the transects is subject to grazing.

(xiv) Xylem potential attempted on two of same species as the porometry will be collected. However, due to either the free flowing nature of the sap and/or the architecture of the plant, data collection is not feasible.

7) Site 8: 5/16/02

Arrival: 14:05

Departure: 1600

Conditions: heavy overcast, very light SE breeze, moderate rain fell for about ten minutes around 1535

-IR surface temperature distribution with vegetation height taken in field of view of Site 8 flux station IR temperature sensor just outside of cow fencer (about 3m north of fencer)

-Site 8 radiometers cleaned at 1449, some debris accumulated prior to cleaning. ***Top dome of net radiometer had small crack on lower edge at ‘2 o’clock’ orientation for observer facing north***

-Swapped storage card #5 for storage card #1 (also marked 04/02) and delivered to ISSF trailer

-Gravimetric soil core taken at 1530

-2 land surface characterization transects selected

(i) Western transect begins approximately 30m west of radiometer instrumentation and extends for 20m – beginning and end of transect marked with blue flags

(ii) Southern transect begins approximately 20m south of radiometer instrumentation and extends for 20m – beginning and end of transect marked with blue flags

- Photographs in the cardinal directions, selected vegetation, and transects taken.

- Trime measurements taken next to the soil profiler and where the core sample was collected.

8) Site 7: 5/16/02

Arrival: 1550

Departure: 1705

Conditions: heavy overcast, light NE winds, light ‘sprinkle of rain for about ten minutes at 1705

-Radiometers cleaned at 1700, some dust on domes prior to cleaning

-Gravimetric soil core taken at 1654

-Cuttings of the representative species to be used for porometry were taken for identification purposes.

9) Site 6: 5/17/02

Arrival: 1530

Departure: 2015

Conditions: sunny, very few isolated clouds, light to moderate wind NNE

-Radiometers cleaned at 1721; domes appeared free of debris – net radiometer level.

-Single surface characterization transect selected beginning about 40m north of Site 6 flux station solar panel array, extending for 45m with every 5m marked with orange flags denoting sampling point (including endpoints)

-Gravimetric soil core taken at 1736 about 5 m west of solar panel array

-IR surface temperature distribution with vegetation height taken in field of view of Site 6 flux station IR temperature sensor (about 3m north of flux station tripod); 4 samples taken at 2 different times

-IR surface temperature distribution with vegetation height taken along surface characterization transect of Site 6

-Digital photos of 4cardinal directions taken at 1917

-Photographs of the 4 cardinal directions taken.

-LAI and MSR measurements taken of sampling transect as well as in field of view of PAM flux tower IR view.

10) Site 3: 5/18/02

Arrival: 1221

Departure: 1840

Conditions: clear with few cirrus clouds to the NW, SSE winds light to moderate

Observers: JA & JU

-Began disassembly of CU flux station after data download. Due to a “hiccup” with the software the data was downloaded via laptop. This appears to have reset the program as follow-up test downloads to the SM4 storage module have proceeded as normal.

-Digital pictures of Site 3 four cardinal directions taken at ~1453

-Surface characterization transects selected:

(i) western transect beginning located 20m north and 20m west of solar panel array (NW corner of fencer), extends for 20m and is marked by orange flags every 5m

(ii) southern transect beginning located 20m south of flux tower cow fencer directly south of net radiometer, extends 20m and is marked with orange flags every 5m

11) Site 10: 5/18/02

Arrival: 1850

Departure: 2209

Conditions: Clear, moderate south wind

Observers: JU & JA

-Installation of CU flux station, located 155m SW of NE corner of quarter section (original GPS coordinates). The final coordinates for the site 10 flux tower are:

N 36deg 53.481 W 100deg 36.273.

12) Site 10: 5/19/02

Arrival: 1052

Departure: 1825

Conditions: Clear, strong South wind

Observers: JA & JU

-Installation of the CU flux station completed. All instrumentation, including the data download process, was tested and found to be working well except soil heat flux plate 2. This plate was observed to give erratic and incorrect reading do to a fracture in its housing and will need to be replaced.

-Further the soil instrumentation was arranged as follows:

CS615 soil moisture probes at 5, 10, and 15cm

Soil heat flux plates are placed 20cm apart centered on the column of CS615s; the plates are at a depth of 5cm.

The soil temperature probe was placed at a depth of 2.5cm directly above the CS615s.

The ground at this site is very hard and the depth utilized was the maximum that could be reasonable dug. Additionally, since the ground breaks up into large, very hard clods that do not crumble easily (every attempt was made to break them up) the coarseness of the soil used to bury the soil instrumentation may effect initial measurements.

-Also, for consistence with the NCAR flux-PAM stations, the orientation of the eddy flux instruments was adjusted. The sonic anemometer and krypton hygrometer are oriented facing East to better catch the dominant southerly winds. The net radiometer faces due south and the IR thermometer to the west.

-Surface Characterization transects selected:

(i) western transect begins 20m north and 10m west of NW fender post (corner post), extends 20m to the west and is marked by orange flags every 5m

(ii) southern transect begins 20m directly south of southern center fencer post (7m south of flux tower), extends for 20m, marked with orange flags every 5m

-Surface Characterization:

(i) Gravimetric soil core sample collected due west of the station, just outside the fence perimeter.

(ii) Trime measurements taken next to soil moisture profiler and soil core, as well as along western and southern transects.

(iii) IR surface temperature distribution with vegetation height taken in field of view of flux tower IR instrument, 4 samples taken at 2 different times. IR surface temperature measurements also taken along western and southern transects (distribution with vegetation height not measured on transects because vegetation height insignificant).

(iv) MSR readings taken along western and southern transects as well as in field of view of flux tower IR instrument.

(v) LAI measurements taken. While the bases of the vegetation appear dead and dry, this will serve as a baseline if there is future regrowth.

(vi) NO porometry sampled due to small size of vegetation since no green vegetation was present.

(vii) NO xylem potential measured since grass internal architecture does not work with this procedure

(viii) Photographs taken of 4 cardinal, the tower setup and surface. Digital photos taken of 4 cardinal directions and along western and southern transect.

13) Site 1: 5/20/02

Arrival:1019

Departure: 1335

Conditions: clear, few high cirrus clouds, wind strong from SSW

Observers: JU & JA

-Site 1 radiometers cleaned @ 1219, no damage or significant debris (only light dust)

-storage media flash card recording lights checked, top light: off, 2nd from top light: flashing, bottom 2 lights solid – equipment recording properly.

-Surface Characterization transects selected

(i) western transect begins 20m west of radiometer ‘saw horse’ and extends for 20m, marked by orange flags every 5m

(ii) southern transect begins 20m south of radiometer ‘saw horse’ and extends for 20m, marked by orange flags every 5m

-Surface Characterization:

(i) Gravimetric soil core sample collected 5m west of the solar panels at 1100.

(ii) Trime samples taken next to 3 soil moisture profiler locations and soil core sample location as well as along western and southern transects

(iii) IR surface temperature taken in field of view of Site 1 PAM IR temperature instrument: 4 samples taken at 2 different times – no vegetation present to measure such IR temp distribution with height. IR surface temperature also taken along western and southern transects.

(iv) MSR measurements taken in field of view for flux tower IR temperature sensor as well as along western and southern transects

(v) NO LAI taken due to absence of vegetation

(vi) NO porometry measurements due to absence of vegetation

(vii) NO xylem potential measurements taken due to lack of vegetation

(viii) Photographs taken of 4 cardinal direction . Digital photographs taken of 4 cardinal directions as well as along western and southern transects

14) Site 2: 5/20/02

Arrival: 1409

Departure: 1901

Conditions: sunny, scattered cumulus to NW, strong SSW winds

Observers: JA & JU

-Radiometers cleaned and level checked at 1620 (?).

-Surface Characterization transects selected:

(i) western transect begins 25m west of Site 2 radiometer ‘saw horse’, extends for 20m and is marked by orange flags every 5m

(ii) southern transect begins 20m south of radiometer ‘saw horse’, extends for 20m and is marked with orange flags every 5m

-Surface Characterization:

(i) Gravimetric soil core sample collected 10m west of the radiometer “sawhorses” at 1447.

(iii) Trime measurements taken next to soil moisture profiler and soil core, as well as along western and southern transects.

(iv) IR surface temperature distribution with vegetation height taken in field of view of flux tower IR instrument, 4 samples taken at 2 different times. IR surface temperature distribution with vegetation height also taken along western and southern transects

(v) MSR readings taken along western and southern transects as well as in field of view of flux tower IR instrument.

(vi) LAI measurements taken in field of view of flux tower IR instrument as well as along western and southern transects

(vii) Porometry data lost due to improper baud rate during download – information garbled and deleted from storage device

(viii) NO xylem potential measured since dominant ‘vine-weed’ vegetation not compatible with this procedure

(ix) Photographs taken of 4 cardinal directions and of the “vineweed”.

(x) Digital photos taken of 4 cardinal directions and along western and southern transect.

15) Site 3: 5/20/02

Arrival: 1952

Departure: 2030

Conditions: partly cloudy, moderate south winds

Observers: JU & JA

-LAI taken in Site 3 PAM flux tower IR instrument field of view as well as along western and southern transects

16) Site 3: 5/21/02

Arrival: 1200

Departure: 1628

Conditions: Sunny, light SSW wind increasing to strong SSW wind as day progressed

Observers: JA & JU

-Radiometers cleaned @ 1623

- Surface Characterization:

(i) Gravimetric soil core sample collected due west of the radiometer sawhorses at the perimeter of the fence at 1620.

(iii) Trime measurements next to soil moisture profiler and soil core, as well as along western and southern transects.

(iv) IR surface temperature distribution with vegetation height taken in field of view of flux tower IR instrument, 4 samples taken at 2 different times. IR surface temperature distribution with vegetation height also taken along western and southern transects

(v) MSR readings taken along western and southern transects as well as in field of view of Site 2 PAM flux tower IR instrument.

(vi) Porometry data collected along the western and southern transects. Both of the dominant species, sage and “thorny bush”, are sampled. Note, final values can not be calculated until the actual LAI is measure in the lab.

(vii) Photographs taken of 4 cardinal directions and along western and southern transect and of the dominant plants.

(viii) Digital photos taken of 4 cardinal directions and along western and southern transect.

17) Site 5: 5/22/02

Arrival: 1213

Departure: 1525

Conditions: overcast, though with decent light penetration, strong SSW winds

Observers: JU & JA

- Radiometers cleaned and level checked at 1404

- Surface Characterization transect selected:

-Single NW transect selected along access road to flux tower, beginning approximately 20m NW of solar panel array, extends 45m marked with orange flags every 5m

- Surface Characterization:

(i) Gravimetric soil core sample collected 5m west of the solar panels at1252.

(iii) Trime measurements next to soil moisture profiler and soil core, as well as along western and southern transects.

(iv) IR surface temperature distribution with vegetation height taken in field of view of flux tower IR instrument, 4 samples taken at 5 different times. IR surface temperature distribution with vegetation height also taken along western and southern transects

(v) MSR readings taken along western transect as well as in field of view of flux tower IR instrument.

(vi) LAI measurements taken in field of view of flux tower IR instrument as well as along western transects

(vii) Porometry data collected along western transect.

(viii) NO xylem potential measured since winter wheat vegetation not compatable with this procedure

(ix) Photographs taken of 4 cardinal directions and along western and southern transect.

(x) Digital photos taken of 4 cardinal directions and along western and southern transect.

18) Site 4: 5/22/02

Arrival: 1551

Departure: 1755

Conditions: overcast, though decent light penetration, strong SSW winds

Observers: JA & JU

-Radiometers cleaned

-Surface Characterization transects selected:

(i) western transect begins 20m west of radiometer ‘saw horse’, extends for 20m and is marked with orange flags every 5m

(ii) southern transect begins 20m south of radiometer ‘saw horse’, extending for 20m with orange flags every 5m

-Surface Characterization:

(i) Gravimetric soil core sample collected 10m west of radiometer ‘saw horse’ at 1606

(iii) Trime measurements next to soil moisture profiler and soil core, as well as along western and southern transects.

(iv) IR surface temperature distribution with vegetation height taken in field of view of flux tower IR instrument, 4 samples taken at 5 different times. IR surface temperature distribution with vegetation height also taken along western and southern transects

(v) MSR readings taken along western and southern transects as well as in field of view of flux tower IR instrument.

(vi) LAI measurements taken in field of view of flux tower IR instrument as well as along western and southern transects

(vii) Porometry data collected along transect

(viii) NO xylem potential measured since grass vegetation not compatible with this procedure

(ix) Photographs taken of 4 cardinal directions and of dominant surface types and vegetation.

(x) Digital photos taken of 4 cardinal directions and along western and southern transect.