ecor > Eddy Correlation Flux Measurement SystemInstrument Type(s) > Baseline • Guest

The eddy correlation (ECOR) flux measurement system provides half-hour measurements of the surface turbulent fluxes of momentum, sensible heat, latent heat, and carbon dioxide. The ECOR uses the eddy covariance technique, which involves correlation of the vertical wind component with the horizontal wind component, air temperature, water vapor density, and CO2 density. The system includes:

  • A fast-response, 3D wind sensor (sonic anemometer) to record the orthogonal wind components and the speed of sound (SOS), which is used to derive the air temperature;
  • An open-path infrared gas analyzer (IRGA) to obtain the water vapor density and CO2 density; and
  • An IRGA to obtain the methane density (at the NSA and OLI sites only).

ECOR systems are deployed where other methods for measuring surface fluxes, such as energy balance Bowen ratio systems (EBBR), are difficult to use.

Uncorrected turbulent fluxes are available in the 30ecor datastream. It is recommended that routine ECOR corrections are applied to the data prior to use, and corrected fluxes are available in the 30qcecor VAP. In October 2019 the ECOR systems at SGP were upgraded with newer-model instruments, including the addition of a microprocessor allowing both uncorrected and corrected fluxes in a single datastream, ecorsf, and eliminating the need for the ECOR VAP at these sites.

Locations

  • Fixed
  • AMF1
  • AMF2
  • AMF3

2021

Biscaro T, L Machado, S Giangrande, and M Jensen. 2021. "What drives daily precipitation over the central Amazon? Differences observed between wet and dry seasons." Atmospheric Chemistry and Physics, 21(9), 10.5194/acp-21-6735-2021.

Kirshbaum D and K Lamer. 2021. "Climatological sensitivities of shallow-cumulus bulk entrainment in continental and oceanic locations." Journal of the Atmospheric Sciences, , 10.1175/JAS-D-20-0377.1. ONLINE.

Yang Z, M Huang, L Berg, Y Qian, W Gustafson, Y Fang, Y Liu, J Fast, K Sakaguchi, and S Tai. 2021. "Impact of Lateral Flow on Surface Water and Energy Budgets over the Southern Great Plains – A Modeling Study." Journal of Geophysical Research: Atmospheres, , e2020JD033659, 10.1029/2020JD033659. ONLINE.

Feldman D, A Aiken, W Boos, R Carroll, V Chandrasekar, W Collins, S Collis, J Deems, P DeMott, J Fan, A Flores, D Gochis, J Harrington, M Kumjian, LR Leung, T O'Brien, M Raleigh, A Rhoades, SM Skiles, J Smith, R Sullivan, P Ullrich, A Varble, and K Williams. 2021. Surface Atmosphere Integrated Field Laboratory (SAIL) Science Plan. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-004.

Varble A, S Nesbitt, P Salio, J Hardin, N Bharadwaj, P Borque, P DeMott, Z Feng, T Hill, J Marquis, A Matthews, F Mei, R Öktem, V Castro, L Goldberger, A Hunzinger, K Barry, S Kreidenweis, G McFarquhar, L McMurdie, M Pekour, H Powers, D Romps, C Saulo, B Schmid, J Tomlinson, S van den Heever, A Zelenyuk, Z Zhang, and E Zipser. 2021. "Utilizing a Storm-Generating Hotspot to Study Convective Cloud Transitions: The CACTI Experiment." Bulletin of the American Meteorological Society, , 10.1175/BAMS-D-20-0030.1. ONLINE.

Carneiro R, G Fisch, T Neves, R Santos, C Santos, and C Borges. 2021. "Nocturnal Boundary Layer Erosion Analysis in the Amazon Using Large-Eddy Simulation during GoAmazon Project 2014/5." Atmosphere, 12(2), 10.3390/atmos12020240.

Krishnamurthy R, R Newsom, D Chand, and WJ Shaw. 2021. Boundary Layer Climatology at ARM Southern Great Plains. Pacific Northwest National Laboratory. PNNL-30832.

Geerts B, G McFarquhar, L Xue, M Jensen, P Kollias, M Ovchinnikov, M Shupe, P DeMott, Y Wang, M Tjernstrom, P Field, S Abel, T Spengler, R Neggers, S Crewell, M Wendisch, and C Lupkes. 2021. Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-21-001.

2020

Dai Y, I Williams, and S Qiu. 2020. "Simulating the effects of surface energy partitioning on convective organization: Case study and observations in the US Southern Great Plains." Journal of Geophysical Research: Atmospheres, 126(2), e2020JD033821, 10.1029/2020JD033821.
Research Highlight

Wei X, P Chan, and Z Kuang. 2020. "Two‐Point Mixing, Buoyancy Sorting, and Updraft Dilution in the RACORO Campaign." Geophysical Research Letters, 47(23), e2020GL090674, 10.1029/2020GL090674.


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