Atmospheric CO2 Observations Reveal Strong Correlation Between Regional Net Biospheric Carbon Uptake and Solar-Induced Chlorophyll Fluorescence

Details

• Journal Title:
  Geophysical Research Letters
• Personal Author:
  Shiga, Yoichi P. ; Tadić, Jovan M. ; Qiu, Xuemei ; Yadav, Vineet ; Andrews, Arlyn E. ; Berry, Joseph A. ; Michalak, Anna M.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; GML (Global Monitoring Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)
• Description:
  Recent studies have shown the promise of remotely sensed solar-induced chlorophyll fluorescence (SIF) in informing terrestrial carbon exchange, but analyses have been limited to either plot level (similar to 1 km(2)) or hemispheric/global (similar to 10(8) km(2)) scales due to the lack of a direct measure of carbon exchange at intermediate scales. Here we use a network of atmospheric CO2 observations over North America to explore the value of SIF for informing net ecosystem exchange (NEE) at regional scales. We find that SIF explains space-time NEE patterns at regional (similar to 100 km(2)) scales better than a variety of other vegetation and climate indicators. We further show that incorporating SIF into an atmospheric inversion leads to a spatial redistribution of NEE estimates over North America, with more uptake attributed to agricultural regions and less to needleleaf forests. Our results highlight the synergy of ground-based and spaceborne carbon cycle observations.
• Source:
  Geophysical Research Letters, 45(2), 1122-1132.
• DOI:
  https://doi.org/10.1002/2017gl076630
• Document Type:
  Journal Article
• Funding:
  Grant no. NA08OAR4310533 ; Grant no. NA11OAR4310056
• Rights Information:
  Other
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha-512:5a2e079420f5b81f2a42477c9b8a16007dfce3a89eddf46cea66cda4a40a41fd88e58c0307d8d4c6793064f8672b28f6c29d018fa03c78478e184fec73161fa7
• Download URL:
  https://repository.library.noaa.gov/view/noaa/21849/noaa_21849_DS1.pdf
• File Type:
  [PDF - 744.96 KB ]