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Title: Chlorophyll Fluorescence Better Captures Seasonal and Interannual Gross Primary Productivity Dynamics Across Dryland Ecosystems of Southwestern North America

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2017gl075922· OSTI ID:1537304
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [3];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [4]
  1. Univ. of Arizona, Tucson, AZ (United States)
  2. USDA Agricultural Research Service, Tucson, AZ (United States)
  3. Univ. of Montana, Missoula, MT (United States)
  4. Univ. of New Mexico, Albuquerque, NM (United States)

Satellite remote sensing provides unmatched spatiotemporal information on vegetation gross primary productivity (GPP). Yet understanding of the relationship between GPP and remote sensing observations and how it changes with factors such as scale, biophysical constraint, and vegetation type remains limited. This knowledge gap is especially apparent for dryland ecosystems, which have characteristic high spatiotemporal variability and are under–represented by long–term field measurements. Here we utilize an eddy covariance (EC) data synthesis for southwestern North America in an assessment of how accurately satellite–derived vegetation proxies capture seasonal to interannual GPP dynamics across dryland gradients. We evaluate the enhanced vegetation index, solar–induced fluorescence (SIF), and the photochemical reflectivity index. We find evidence that SIF is more accurately capturing seasonal GPP dynamics particularly for evergreen–dominated EC sites and more accurately estimating the full magnitude of interannual GPP dynamics for all dryland EC sites. Furthermore, these results suggest that incorporation of SIF could significantly improve satellite–based GPP estimates.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0016011
OSTI ID:
1537304
Journal Information:
Geophysical Research Letters, Vol. 45, Issue 2; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 88 works
Citation information provided by
Web of Science

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Cited By (9)

Strong constraint on modelled global carbon uptake using solar-induced chlorophyll fluorescence data journal January 2018
Sun‐induced Chl fluorescence and its importance for biophysical modeling of photosynthesis based on light reactions journal April 2019
Plant phenology and global climate change: Current progresses and challenges journal April 2019
Satellite and Station Observations Demonstrate Water Availability's Effect on Continental‐Scale Evaporative and Photosynthetic Land Surface Dynamics journal January 2019
Constraining estimates of terrestrial carbon uptake: new opportunities using long‐term satellite observations and data assimilation journal August 2019
Do all chlorophyll fluorescence emission wavelengths capture the spring recovery of photosynthesis in boreal evergreen foliage? journal August 2019
A Global, 0.05-Degree Product of Solar-Induced Chlorophyll Fluorescence Derived from OCO-2, MODIS, and Reanalysis Data journal March 2019
Evaluating the Performance of Satellite-Derived Vegetation Indices for Estimating Gross Primary Productivity Using FLUXNET Observations across the Globe journal August 2019
Ecohydrology of urban trees under passive and active irrigation in a semiarid city journal November 2019

Figures / Tables (4)