edu.ucar.opensky::articles:26817 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:57:26.185378 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7pk0m87 https://doi.org/10.17190/AMF/1419510 https Related Dataset #1 AmeriFlux AmeriFlux US-CZ2 Sierra Critical Zone, Sierra Transect, Ponderosa Pine Forest, Soaproot Saddle https://doi.org/10.17190/AMF/1419511 https Related Dataset #2 AmeriFlux AmeriFlux US-CZ4 Sierra Critical Zone, Sierra Transect, Subalpine Forest, Shorthair https://doi.org/10.48443/7cqp-3j73 https Related Dataset #3 Bundled data products - eddy covariance (DP4.00200.001) https://doi.org/10.5067/MODIS/MCD15A2H.061 https Related Dataset #4 MODIS/Terra+Aqua Leaf Area Index/FPAR 8-Day L4 Global 500m SIN Grid V061 https://doi.org/10.5067/MODIS/MOD10CM.061 https Related Dataset #5 MODIS/Terra Snow Cover Monthly L3 Global 0.05Deg CMG, Version 61 https://doi.org/10.5281/zenodo.8239702 https Related Dataset #6 SIF and CLM5 outpfile files to support Kunik et al "Satellite-based solar-induced fluorescence tracks seasonal and elevational patterns of photosynthesis in California's Sierra Nevada mountains" https://doi.org/10.7289/V5C8276M https Related Dataset #7 ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis Satellite-based solar-induced fluorescence tracks seasonal and elevational patterns of photosynthesis in California's Sierra Nevada mountains 2024-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7pk0m87 https://doi.org/10.1088/1748-9326/ad07b4 Kunik, L. author Bowling, D. R. author Raczka, Brett author Frankenberg, C. author Köhler, P. author Cheng, R. author Smith, K. R. author Goulden, M. author Jung, M. author Lin, J. C. author UCAR/NCAR - Library publisher Robust carbon monitoring systems are needed for land managers to assess and mitigate the changing effects of ecosystem stress on western United States forests, where most aboveground carbon is stored in mountainous areas. Atmospheric carbon uptake via gross primary productivity (GPP) is an important indicator of ecosystem function and is particularly relevant to carbon monitoring systems. However, limited ground-based observations in remote areas with complex topography represent a significant challenge for tracking regional-scale GPP. Satellite observations can help bridge these monitoring gaps, but the accuracy of remote sensing methods for inferring GPP is still limited in montane evergreen needleleaf biomes, where (a) photosynthetic activity is largely decoupled from canopy structure and chlorophyll content, and (b) strong heterogeneity in phenology and atmospheric conditions is difficult to resolve in space and time. Using monthly solar-induced chlorophyll fluorescence (SIF) sampled at similar to 4 km from the TROPOspheric Monitoring Instrument (TROPOMI), we show that high-resolution satellite-observed SIF followed ecological expectations of seasonal and elevational patterns of GPP across a 3000 m elevation gradient in the Sierra Nevada mountains of California. After accounting for the effects of high reflected radiance in TROPOMI SIF due to snow cover, the seasonal and elevational patterns of SIF were well correlated with GPP estimates from a machine-learning model (FLUXCOM) and a land surface model (CLM5.0-SP), outperforming other spectral vegetation indices. Differences in the seasonality of TROPOMI SIF and GPP estimates were likely attributed to misrepresentation of moisture limitation and winter photosynthetic activity in FLUXCOM and CLM5.0 respectively, as indicated by discrepancies with GPP derived from eddy covariance observations in the southern Sierra Nevada. These results suggest that satellite-observed SIF can serve as a useful diagnostic and constraint to improve upon estimates of GPP toward multiscale carbon monitoring systems in montane, evergreen conifer biomes at regional scales. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation