Field Notes
<--2017-06-14 09:00:00 | 2017-06-27 10:00:00-->Other sites visited today: Mayberry | Twitchell Alfalfa | West Pond | Sherman Wetland | Bouldin Alfalfa | Bouldin Corn
East End: 2017-06-23 10:00:00 (DOY 174)
Author: Joe Verfaillie
Others: Kyle, Sam, Dennis
Summary: Set up TempTower3 - boardwalk. Replaced thermocouples with floating jellyfish thermocouples at TempTower1 - Open Water. No images at Permanent Tower
| East End 2017-06-23 I arrived about 10am with Sam, Kyle and Dennis. It was clear, sunny and hot but breezy. We installed the third temporary tower at the end of the first boardwalk south of the permanent tower. Temporary Tower 1 – Open Water: Kyle went on a rogue trip to the open water met station to replace the stick-bound thermocouples with the 'jellyfish' thermocouples, to better capture the near-surface water as the WT moves. Measuring at 0, 15, 30, 50, and 100 cm from the surface of the water. Temporary Tower 3 – Boardwalk: We bolted a Campbell tripod to the railing at the end of the boardwalk. The center post was a little too high and we cut about 18in off of it to bring the eddy sensors within reach when standing on top of the 8ft step ladder. There is an open channel at the end of the boardwalk but relatively thick vegetation beyond and back along the boardwalk. The solar panels went across the railings back about 20 feet from the tower. The met sensors between the solar panels and the tower – this allowed the met sensors to be installed in and over thick vegetation that should be more representative of the footprint than the open water at the end of the boardwalk. The Rnet and PAR went on a temporary, 2x2 wooden post over the vegetation to the south of the boardwalk and the ground sensors went in north of the boardwalk to prevent trampling the vegetation under the radiation sensors. This tower is using an older LI7500, a newer Gill WM, borrowing a 7700 from Bouldin and recording at 10Hz on a CR1000. Thermocouples were wire to ports 1-10 in two sets of five at -5, 0, 15, 25, 35, -5, 0, 15, 25, and 35 cm from the surface (negative being soil and positive being water). The water level sensors was hung from the boardwalk 111cm from the boardwalk to the sensor head and 128cm from the boardwalk to the sediment. It was reading 0.3psi. The base of the sonic is 3.4m above the boardwalk and 19cm center-to-center from the 7500. Full equipment list: CR1000 flux sn 23865 wp 20447 CR1000 met sn 50889 wp 50815? 50615? NL115 sn 6761 AM16/32 sn 1238 SHF#1 sn 00245 61.5uV/(W/m2) SHF#2 sn 000137 60.0 uV(W/m2) Water pressure sn 20010046 HMP60 sn L1740420 PAR sn 050596 NR-Lite sn 041556 Sonic: sn 120907 7500: sn 0976 7700: sn TG1-0424 miniDot sn 1219 Hobo salinity sn 11020258 Solar panel sn 11ZV0M0836 Solar panel sn 11ZV0M0855 Solar controller sn 3317052234210 Permanent Tower: About 2pm we collected the data from the Permanent tower. The 7500 read: 416ppm CO2, 812mmol/m3 H2O, 30.3C, 100.9kPa, 92.9SS – 93.9 after cleaning The 7700 read: 1.94ppm CH4, 40RSSI – 88.3 after cleaning There were lots of spider webs on the eddy sensors. Sam cleaned the radiation sensors. There was no camera images. The CR1000 was no longer on the network. I tried everything I could think of but could not connect to the CR1000 over the Ethernet. Need to test it more next week – new cable, new interface. |
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