Site: Bouldin Corn (BC) aka US-Bi2
2017-04-26 - Present
Corn field on Bouldin Island in the Sacramento San Joaquin Delta. This site has deep peat that was drained for farming. Over the past 100 years there has been excessive subsidence of the peat in the Delta region. The corn is usually harvested for silage cattle feed.
Corn was planted in the field 2017-2023. Sorghum was planted in the field 2024.
Last field site visit: more fieldnotes
| 2024-11-19 14:30:00 | Field has been tilled, rad boom was folded in since last visit, storms coming later this week |
Latest data processing: more processing notes
| 2024-05-29 | Quarterly data analysis for AmeriFLUX for dates: 2024-01-01 - 2024-05-01 |
| Processor of record: 2017-05-31 - Kyle Hemes 2019-06-19 - Camilo Rey-Sanchez 2021-09-29 - Carlos Wang 2024-05-29 - Arman Ahmadi |
Ameriflux Author:
20170426 - Daphne Szutu 20170426 - Kyle Hemes 20170426 - Joseph Verfaillie 20170426 - Dennis Baldocchi 20190619 - Camilo Rey-Sanchez 20210622 - Carlos Tianxin Wang |
Data Digital Object Identifier (DOI)
AmeriFlux: https://doi.org/10.17190/AMF/1419513
FLUXNET: https://doi.org/10.17190/AMF/1871135
FLUXNET-CH4: https://doi.org/10.18140/FLX/1669667
Equipment Locations
more details
| Equipment | Start Date | End Date | X | Y | Z | Notes |
|---|---|---|---|---|---|---|
| Air Quality Sensor | 2019-02-12 | - | ||||
| Anemometer | 2017-04-26 | 2019-12-13 | 0 | 0 | 5.16 | Heading=0 |
| 2019-12-13 | 2020-05-19 | Heading=14 Tower rebuilt after wind blow down | ||||
| 2020-05-19 | 2021-02-03 | Heading=19 Tower move to corn 8m | ||||
| 2021-02-03 | 2021-05-27 | 5.05 | Heading=338 Tower moved back to power pole | |||
| 2021-05-27 | - | Heading=353 Tower moved to corn | ||||
| Barometer | 2017-04-26 | - | PRES-ElectBar | |||
| Camera | 2017-07-12 | - | 0.17 | -2 | 3.86 | |
| camera B | 2020-05-19 | - | Fisheye lens | |||
| Camera C | 2020-05-19 | - | Fisheye lens | |||
| Data Logger Diffuse PAR | 2017-07-14 | - | ||||
| Data Logger Met | 2017-04-26 | - | ||||
| Data Logger Surface Renewal | 2021-06-16 | - | ||||
| Data Logger Test_A | 2020-09-10 | - | Added from globe thermometer test | |||
| Forced Diffusion A | 2019-11-14 | - | ||||
| Forced Diffusion B | 2019-11-14 | - | ||||
| Forced Diffusion C | 2019-11-14 | - | ||||
| Gas Analyzer CH4 | 2017-04-26 | - | 0.41 | -0.03 | 5 | GA_OP-LI-COR LI-7700 |
| Gas Analyzer CO2/H2O | 2017-04-26 | - | 0.39 | -0.29 | 5.16 | GA_OP-LI-COR LI-7500A |
| Heat Flux Plate A | 2017-04-26 | 2017-09-19 | -4.05 | -1.07 | -0.02 | SOIL_H-Plate |
| 2022-09-16 | 2022-12-13 | -0.05 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.02 | Moved back into the flooded field | |||
| Heat Flux Plate B | 2017-04-26 | 2017-09-19 | -3.1 | -4.27 | -0.02 | SOIL_H-Plate |
| 2022-09-16 | 2022-12-13 | -0.05 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.02 | Moved back into the flooded field | |||
| Heat Flux Plate C | 2017-04-26 | 2017-09-19 | -2.21 | -5.89 | -0.02 | SOIL_H-Plate |
| 2022-09-16 | 2022-12-13 | -0.05 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.02 | Moved back into the flooded field | |||
| Infrared Temperature North | 2021-06-16 | - | 4.45 | |||
| Infrared Temperature South | 2021-06-16 | - | 4.3 | |||
| Interface LI-7550 | 2017-04-26 | - | INTERFACE | |||
| Interface NL115 | 2017-04-26 | - | ||||
| Multiplexer Met | 2017-04-28 | - | MUX-AM16/32B | |||
| Multiplexer Thermocouple | 2017-04-26 | - | MUX-AM25T | |||
| Narrow Band NDVI Incoming | 2017-04-26 | - | -2.03 | -1.94 | 4.42 | SPECT-LED |
| Narrow Band NDVI Incoming Cal | 2021-05-27 | - | Part of cal kit | |||
| Narrow Band NDVI Reflected | 2017-04-26 | - | -2.03 | -1.94 | 4.42 | SPECT-LED |
| Narrow Band NDVI Reflected Cal | 2021-05-27 | - | Part of cal kit | |||
| Narrow Band PRI Incoming | 2017-04-26 | - | -2.03 | -1.94 | 4.42 | SPECT-LED |
| Narrow Band PRI Reflected | 2017-04-26 | - | -2.03 | -1.94 | 4.42 | |
| Net Radiometer 4-way | 2017-04-26 | - | -2.41 | -1.97 | 4.42 | |
| Net Radiometer 4-way Cal | 2021-05-27 | - | ||||
| PAR Sensor Diffuse | 2017-07-14 | - | 1.79 | -2.84 | 4.65 | |
| PAR Sensor Incoming | 2017-04-26 | - | -2.04 | -2.04 | 4.45 | RAD-PAR Quantum |
| PAR Sensor Incoming Cal | 2021-05-27 | 2021-06-02 | 4.45 | |||
| PAR Sensor Reflected | 2017-04-26 | - | -2.04 | -2.04 | 4.4 | RAD-PAR Quantum |
| PAR Sensor Reflected Cal | 2021-06-02 | - | 4.4 | |||
| PAR Sensor Under-A | 2020-05-29 | - | 0.1 | under canopy PAR | ||
| PAR Sensor Under-B | 2020-05-29 | - | 0.1 | Under canopy PAR | ||
| Precipitation | 2017-04-26 | - | 1.99 | -2.12 | 4.75 | RAIN-TipBucGauge |
| Range Finder | 2019-06-20 | - | ||||
| RH & Temp | 2017-04-26 | - | 0.43 | -0.43 | 4.9 | HMP60 |
| RH & Temp Test_A | 2020-09-10 | - | ||||
| Soil Moisture Probe A | 2017-04-26 | 2020-05-19 | -0.02 | SWC-TDR | ||
| 2020-05-19 | 2020-09-01 | -0.06 | Moved into the field | |||
| 2020-09-01 | 2021-05-27 | -0.02 | Moved to underneath tower | |||
| 2021-05-27 | 2022-09-16 | -0.16 | Moved into the field | |||
| 2022-09-16 | 2022-12-13 | -0.3 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.2 | Moved back into the flooded field | |||
| Soil Moisture Probe B | 2017-04-26 | 2020-05-19 | -0.02 | SWC-TDR | ||
| 2020-05-19 | 2020-09-01 | -0.26 | Moved into the field | |||
| 2020-09-01 | 2021-05-27 | -0.02 | Moved to underneath tower | |||
| 2021-05-27 | 2022-09-16 | -0.26 | Moved into the field | |||
| 2022-09-16 | 2022-12-13 | -0.3 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.2 | Moved back into the flooded field | |||
| Soil Moisture Probe C | 2017-04-26 | 2020-05-19 | -0.02 | SWC-TDR | ||
| 2020-05-19 | 2020-09-01 | -0.16 | Moved into the field | |||
| 2020-09-01 | 2021-05-27 | -0.02 | Moved to underneath tower | |||
| 2021-05-27 | 2022-09-16 | -0.06 | Moved into the field | |||
| 2022-09-16 | 2022-12-13 | -0.3 | Moved under the tower for harvest | |||
| 2022-12-13 | - | -0.2 | Moved back into the flooded field | |||
| Soil Moisture Probe Theta | 2017-04-26 | 2018-05-31 | -0.2 | SWC-TDR | ||
| 2018-05-31 | 2021-06-16 | -0.05 | ||||
| 2021-06-16 | 2021-10-21 | -0.2 | ||||
| 2021-10-21 | 2021-11-05 | -0.05 | ||||
| 2021-11-05 | - | -0.1 | ||||
| Solar Controller Surface Renewal | 2021-06-16 | - | Not used | |||
| Thermocouple Profile A | 2017-04-26 | - | -0.02 | SoilT TEMP-TCouple | ||
| 2017-04-26 | - | -0.04 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.08 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.16 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.32 | SoilT TEMP-TCouple | |||
| Thermocouple Profile B | 2017-04-26 | - | -0.02 | SoilT TEMP-TCouple | ||
| 2017-04-26 | - | -0.04 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.08 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.16 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.32 | SoilT TEMP-TCouple | |||
| Thermocouple Profile C | 2017-04-26 | - | -0.02 | SoilT TEMP-TCouple | ||
| 2017-04-26 | - | -0.04 | SoilT TEMP-TCouple | |||
| 2017-04-26 | - | -0.16 | ||||
| 2017-04-26 | - | -0.08 | ||||
| 2017-04-26 | - | -0.32 | ||||
| Water Level | 2019-04-11 | 2019-12-13 | -0.92 | |||
| 2019-12-13 | 2020-04-17 | -0.91 | Well reinstalled after tower fell down | |||
| 2020-04-17 | 2020-05-19 | 0 | Well removed from field left on surface | |||
| 2020-05-19 | 2020-09-01 | -0.91 | Well reinstalled after planting | |||
| 2020-09-01 | 2021-06-09 | -0.69 | Well reinstalled after moving tower out of field | |||
| 2021-06-09 | - | -0.73 | New well dug after moving tower | |||
| Weather Station A | 2018-06-14 | 2019-06-20 | ||||
| Weather Station B | 2019-04-25 | - | First Arable CalVal | |||
| Weather Station C | 2019-05-23 | - | Second Arable CalVal | |||
| Weather Station PL_A | 2020-06-04 | 2020-09-01 | -17.6 | 3.06 | 3.26 | |
| 2020-09-01 | - | Moved out of the field for harvest | ||||
| Weather Station PL_B | 2020-06-04 | 2020-09-01 | -17.33 | 3.06 | 3.26 | |
| 2020-09-01 | - | Moved out of the field for harvest |
Data Streams:
more data
| Code | First Day | Last Day | Description |
|---|---|---|---|
| BC_arable | 2018-06-14 | - | Data from an Arable Mark weather station. Raw data is recorded at 5min intervals and some calculated values like ppt are produced at hourly intervals. |
| BC_cam | 2017-07-12 | - | Digital number data from Pheoncamera at Bouldin Alfalfa Phenocam archive |
| BC_fda | 2019-11-14 | 2020-09-23 | Soil CO2 flux from an Eosense Forced Diffusion Chamber |
| BC_fdb | 2019-12-17 | 2020-09-23 | Soil CO2 flux from an Eosense Forced Diffusion Chamber |
| BC_fdc | 2019-12-17 | 2023-05-10 | Soil CO2 flux from an Eosense Forced Diffusion Chamber |
| BC_flux | 2017-04-26 | - | 30min averages of high frequency flux data from Licor GHG files |
| BC_irtsr | 2021-06-16 | 2024-01-04 | Surface temperature from two Apogee IRT sensors one pointing north and the other south at a 45 deg declination. These are recorded at both 2Hz and 30min averages for surface renewal by Kevin Tu. |
| BC_met | 2017-04-26 | - | Micromet data from the Bouldin Corn site recorded by a CR1000 as 30min averages of 10sec samples. |
| BC_pa | 2018-11-20 | - | Data from a PurpleAir air quality sensor. |
| BC_processed | 2017-04-27 | - | Data loaded from the Level 1 processed data including fluxes and turbulence data |
| BC_processed3 | 2017-04-27 | - | Gap filled and partitioned data from Level 3 processing files |
Metadata and Data Sets:
more data
| Id | Type | Site | Dates | Frequency | Title | Description |
|---|---|---|---|---|---|---|
| 14 | Harvest | BC, BA | 2016-01-01 - 2019-01-01 | Annual harvest estimates | Bouldin Island annual farmer yield estimates, 2016, 2017, 2018 | Corn silage and alfalfa yield estimates from farmers on Bouldin Island, 2016, 2017, 2018 |
| 16 | LAI | BC, BA, TA | 2017-07-26 - 2020-07-30 | Approx. monthly during growing season with field visits | Optical LAI measured in-situ | ~10 measurements taken each time with a LAI-2200C. Most of the measurements were taken with the 2-wand method, where an "above" wand was set up on a tripod and took measurements every 5 sec, and a "below" wand was used to collect data below the crop canopy. The data were processed in the Licor software FV2200, where each "below" measurement was paired with the "above" measurement closest in time; LAI was calculated and corrected for scattering (based on 4A scattering data). Twitchell Alfalfa: 2017 (2), 2018 (2) Bouldin Alfalfa: 2017 (3), 2018 (9) Bouldin Corn: 2017 (5), 2018 (7) |
| 26 | Lidar | BA, BC, EE, MB, SB, SW, TA, WP | 2016-12-01 - 2017-03-07 | Once | Delta-wide USGS Lidar flight | Winter time Lidar flight commissioned by the USGS and flown by Woolpert. Horizontal datum: NAD83 (NSRS2007) Epoch 2017.95, UTM Zone 10N, meters. Vertical datum: NAVD88, GEOID12B, US Survey Feet, Orthometric. Includes classified point cloud, features shape files, bare earth DEM, orthometric imagery (0.3-meter16-bit 4-band RGB-IR tiles in TIFF format with World Files). The entire Delta is covered by 8 points per m2, 0.5m DEM. |
| 3 | Lidar | BA, BC, WP, EP, EE, TA, TW, MB, SB, SW | 2018-09-20 | Once | NCALM Lidar Flight | Lidar flight data collection from Kyle Hemes NCAL project: Ecosystem Structure as a Driver of Climatic, Habitat, and Hydrological Services in Heterogeneous Restored Wetlands. Point clouds (*.las files), 1m resolution DEM and DSM (arcgis GridFloat files), visible imagery (*.tif files) of Sherman, Twitchel and Bouldin Islands. UTM Zone 10N, meters, NAD83(2011) epoch 2010.00 / NAVD88 (GEOID12B) |
| 30 | Soils | SB, BC, Bouldin 1, Staten | 2016-08-01 - 2018-03-15 | Once | %C, %N sampled by Tyler Anthony | Tyler Anthony (Whendee Silver's lab) analyzed %C and %N from shallow soils: -Sherman Barn (Tyler refers to it as "Sherman Pasture"), 0-10cm, probably sampled in Spring 2018 -Bouldin Corn, 0-15cm, sampled 2017-05-16 -Bouldin 1 (Tyler's alfalfa auto-chamber site by the barn), 0-15cm?, sampled 2016-08-01 -Staten ("taken from a corn field west of the road), 0-10cm, sampled 2018-03-15 |
| 25 | Soils | SB, BC, EP, EE, BA, SW, MB | 2018-08-27 - 2018-08-28 | Once | Soil cores for C:N and microbial community | Soil samples were collected to be analyzed for soil moisture, bulk density, C:N, and microbial community. Generally at each site, two transects were sampled (T1 to the north, T2 south), starting near the tower and going to the west. Each transect had 5 sampling locations each (P1-P5), each location about 5m apart. At wetland locations (SW, MB, EE, EP, WP), soils were collected at 0-15cm depth. At agricultural locations (BA, BC, SB), soils were collected at 3 depths: 0-15cm, 15-30cm, and 30-60cm. For more information, see the field notes from each day. 2018-08-27 -Sherman Barn: The water table was around 50-60cm. -Bouldin Corn: Transects starting from the first corn rows running parallel away from the tower. Dry peat layer around 60 cm. -Bouldin Alfalfa: Transects starting roughly 5m from the tower. A smaller subsample was taken for microbial analysis. -East End: Transects starting 5-10m from the tower, going west/southwest through dense veg with the T2P4 and T2P5 taken from veg near the open water section. A smaller subsample was taken for microbial analysis. -East Pond: Transects starting about 7m from tower to the west (T1) and southwest (T2). (i.e. after the big open pond section by the solar panels). A smaller subsample was taken for microbial analysis. T2P5 was taken from the more uniformly vegetated area to the west. Other samples were mostly from fairly open water areas near clusters of veg. 2018-08-28 -Mayberry: Two transects (T1 in veg, T2 near the open water) each going northwest of the tower and took microbial subsamples from each core. -Sherman Wetland: We took two transects (T1 to the north, T2 south) going west from the tower starting where the water was about 20 cm deep and following the low vegetation. |
Report_NR01PRTcorrection_20170623.pdf - Fixing NR01 PRT data at Bouldin Corn in June 1 - 23, 2017
BC 4-way Comparison May 2017
GCC comparision - Midday vs. Whole-day
BC canopy height and phenology
Manual vs Turbulent Vegetation Height
Zcam gap fraction at Bouldin Corn
Bouldin Corn - NDVI (SRS, Apogee, Arable, Planet)
Bouldin Corn - Radiometer Calibration 2021
Zcam gap fraction at Bouldin Corn - 2021, 2022, 2023
Zcam gap fraction at Bouldin Sorghum - 2024