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Published July 28, 2018 | Supplemental Material + Published
Journal Article Open

Solar-Induced Fluorescence Detects Interannual Variation in Gross Primary Production of Coniferous Forests in the Western United States

Abstract

Quantifying gross primary production (GPP), the largest flux of the terrestrial carbon cycle, remains difficult at the landscape scale. Evergreen needleleaf (coniferous) forests in the western United States constitute an important carbon reservoir whose annual GPP varies from year‐to‐year due to drought, mortality, and other ecosystem disturbances. Evergreen forest productivity is challenging to determine via traditional remote sensing indices (i.e., NDVI and EVI), because detecting environmental stress conditions is difficult. We investigated the utility of solar‐induced chlorophyll fluorescence (SIF) to detect year‐to‐year variation in GPP in four coniferous forests varying in species composition in the western United States (Sierra Nevada, Cascade, and Rocky Mountains). We show that annually averaged, satellite‐based observations of SIF (retrieved from GOME‐2) were significantly correlated with annual GPP observed at eddy covariance towers over several years. Further, SIF responded quantitatively to drought‐induced mortality, suggesting that SIF may be capable of detecting ecosystem disturbance in coniferous forests.

Additional Information

© 2018 American Geophysical Union. Received 12 MAR 2018; Accepted 14 JUN 2018; Accepted article online 25 JUN 2018; Published online 20 JUL 2018. The MODIS MOD13C2 v006 and MOD17A2 v055 data products were retrieved from the online Reverb tool (https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table) courtesy of the NASA EOSDIS Land Processes Distributed Active Archive Center (LP DAAC), USGS/Earth Resources Observation and Science (EROS) Center, Sioux Falls, South Dakota. NARR data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA (https://www.esrl.noaa.gov/psd/). This study was supported by NASA's Carbon Monitoring System Program, under grant NNX16AP33G and the U.S. Department of Energy's Office of Biological and Environmental Science, Terrestrial Ecosystem Science Program, under awards DE‐SC0010624 and DE‐SC0010625. The Niwot site (US‐NR1) was supported by the U.S. DOE, Office of Science through the AmeriFlux Management Project (AMP) at Lawrence Berkeley National Laboratory, award 7094866. We are grateful to Bev Law and Sean Burns for sharing site level eddy covariance observations. We thank Simon Brewer, Brett Raczka, and Henrique Duarte for helpful discussions.

Attached Files

Published - Zuromski_et_al-2018-Geophysical_Research_Letters.pdf

Supplemental Material - grl57635-sup-0001-2018gl077906-si.pdf

Supplemental Material - grl57635-sup-0002-2018gl077906-f02-z-.pdf

Supplemental Material - grl57635-sup-0003-2018gl077906-f03-z-.pdf

Supplemental Material - grl57635-sup-0004-2018gl077906-f04-z-.pdf

Supplemental Material - grl57635-sup-0005-2018gl077906-f05-z-.pdf

Supplemental Material - grl57635-sup-0006-2018gl077906-f06-z-.pdf

Supplemental Material - grl57635-sup-0007-2018gl077906-f07-z-.pdf

Supplemental Material - grl57635-sup-0008-2018gl077906-f08-z-.pdf

Supplemental Material - grl57635-sup-0009-2018gl077906-f09-z-.pdf

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Additional details

Created:
August 24, 2023
Modified:
October 18, 2023