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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data.

Gilberto Pastorello1, Carlo Trotta2, Eleonora Canfora2,3

  • 1Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. gzpastorello@lbl.gov.

Scientific Data
|July 11, 2020
PubMed
Summary
This summary is machine-generated.

The FLUXNET2015 dataset offers global ecosystem data on carbon dioxide (CO2), water, and energy exchange. This enhanced dataset, with open-source processing, improves accessibility and reproducibility for Earth science research.

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Area of Science:

  • Earth and Environmental Sciences
  • Ecosystem Science
  • Biogeochemistry

Background:

  • The FLUXNET2015 dataset compiles ecosystem-scale measurements of CO2, water, and energy exchange.
  • Data from 212 global sites (over 1500 site-years) were voluntarily contributed and processed uniformly.
  • Previous versions lacked comprehensive derived products and open-source processing methods.

Purpose of the Study:

  • To present an enhanced FLUXNET2015 dataset with new derived products and open-source processing.
  • To improve data consistency, intercomparability, and accessibility for global research.
  • To release 206 sites under a Creative Commons (CC-BY 4.0) license.

Main Methods:

  • Data aggregation and quality control from 212 FLUXNET sites.
  • Uniform processing methods applied to ensure consistency.
  • Development and release of open-source codes for data processing and analysis.

Main Results:

  • An enhanced FLUXNET2015 dataset including gap-filled time series and ecosystem flux estimates.
  • New derived data products: ecosystem respiration, photosynthetic uptake, and uncertainty estimations.
  • 206 sites are now available under a CC-BY 4.0 license, enhancing data sharing.

Conclusions:

  • The enhanced FLUXNET2015 dataset provides a more accessible, transparent, and reproducible resource for Earth system science.
  • Open-source processing methods facilitate wider adoption and application in ecophysiology, remote sensing, and modeling.
  • The dataset supports advancements in understanding global carbon, water, and energy cycles.