Christian Frankenberg

Dados Biográficos

ID7478570
NOMEChristian Frankenberg
PRENOMESChristian
SOBRENOMEFrankenberg
ASSINATURAFRANKENBERG C
AFILIAÇÕESCalifornia Institute of Technology
ORCID0000-0002-0546-5857
VERIFICADOSim
TOTAL DE OBRAS12
TOTAL DE CITAÇÕES0
TOTAL COMO AUTOR12
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO2015
ANO MAIS RECENTE DE PUBLICAÇÃO2025
ÍNDICE H0

  • Advancements and opportunities to improve bottom–up estimates of global wetland methane emissions

    Open AccessQing Zhu, Daniel J Jacob et al.ARTICLEEnvironmental Research Letters2025

    Wetlands are the single largest natural source of atmospheric methane (CH 4 ), contributing approximately 30% of total surface CH 4 emissions, and they have been identified as the largest source of uncertainty in the global CH 4 budget based on the most recent Global Carbon Project CH 4 report. High uncertainties in the bottom–up estimates of wetland CH 4 emissions pose significant challenges for accurately understanding their spatiotemporal vari…

  • Evaluating the contribution of methanotrophy kinetics to uncertainty in the soil methane sink

    Open AccessHannah Dion‐Kirschner, Newton H Nguyen et al.ARTICLEEnvironmental Research Letters2024

    The oxidation of atmospheric methane by soil microbes is an important natural sink for a potent greenhouse gas. However, estimates of the current and future soil methane sink are highly uncertain. Here we assessed the extent to which methanotrophy enzyme kinetics contribute to uncertainty in projections of the soil methane sink. We generated a comprehensive compilation of methanotrophy kinetic data from modern environments and assessed the patter…

  • Tipping point in North American Arctic-Boreal carbon sink persists in new generation Earth system models despite reduced uncertainty

    Open AccessRenato K Braghiere, Joshua B Fisher et al.ARTICLEEnvironmental Research Letters2023

    Estimating the impacts of climate change on the global carbon cycle relies on projections from Earth system models (ESMs). While ESMs currently project large warming in the high northern latitudes, the magnitude and sign of the future carbon balance of Arctic-Boreal ecosystems are highly uncertain. The new generation of increased complexity ESMs in the Intergovernmental Panel on Climate Change Sixth Assessment Report (IPCC AR6) is intended to imp…

  • Satellite-based solar-induced fluorescence tracks seasonal and elevational patterns of photosynthesis in California’s Sierra Nevada mountains

    Open AccessLewis Kunik, D R Bowling et al.ARTICLEEnvironmental Research Letters2023

    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…

  • Forests for forests

    Open AccessZoe Pierrat, Jacob Bortnik et al.ARTICLEEnvironmental Research Letters2022

    Remote sensing is a powerful tool for understanding and scaling measurements of plant carbon uptake via photosynthesis, gross primary productivity (GPP), across space and time. The success of remote sensing measurements can be attributed to their ability to capture valuable information on plant structure (physical) and function (physiological), both of which impact GPP. However, no single remote sensing measure provides a universal constraint on …

  • Evaluating photosynthetic activity across Arctic-Boreal land cover types using solar-induced fluorescence

    Open AccessRui Cheng, Troy S Magney et al.ARTICLEEnvironmental Research Letters2022

    Photosynthesis of terrestrial ecosystems in the Arctic-Boreal region is a critical part of the global carbon cycle. Solar-induced chlorophyll Fluorescence (SIF), a promising proxy for photosynthesis with physiological insight, has been used to track gross primary production (GPP) at regional scales. Recent studies have constructed empirical relationships between SIF and eddy covariance-derived GPP as a first step to predicting global GPP. However…

  • A physiological signal derived from sun-induced chlorophyll fluorescence quantifies crop physiological response to environmental stresses in the U.S. Corn Belt

    Open AccessHyungsuk Kimm, Kaiyu Guan et al.ARTICLEEnvironmental Research Letters2021

    Sun-induced chlorophyll fluorescence (SIF) measurements have shown unique potential for quantifying plant physiological stress. However, recent investigations found canopy structure and radiation largely control SIF, and physiological relevance of SIF remains yet to be fully understood. This study aims to evaluate whether the SIF-derived physiological signal improves quantification of crop responses to environmental stresses, by analyzing data at…

  • Spatial covariation between solar-induced fluorescence and vegetation indices from Arctic-Boreal landscapes

    Open AccessAndrew J Maguire, Jan U H Eitel et al.ARTICLEEnvironmental Research Letters2021

    The Arctic-Boreal Zone (ABZ) is characterized by spatially heterogeneous vegetation composition and structure, leading to challenges for inferring patterns in vegetation productivity. A mechanistic understanding of the patterns and processes underlying spectral remote sensing observations is necessary to overcome these challenges. Solar-induced chlorophyll fluorescence (SIF), near-infrared reflectance of vegetation (NIRv), and chlorophyll/caroten…

  • The Global Methane Budget 2000–2017

    Open AccessMarielle Saunois, Ann R Stavert et al.ARTICLEEarth System Science Data2020

    Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Atmospheric emissions and concentrations of CH4 continue to increase, making CH4 the second most important human-influenced greenhouse gas in terms of climate forcing, after carbon dioxide (CO2). The relative importance of CH4 compared to CO2 depends on its shorter atmospheric lifetime, stronger warming potential…

  • Methane emissions from underground gas storage in California

    Open AccessAndrew K Thorpe, Riley Duren et al.ARTICLEEnvironmental Research Letters2020

    Accurate and timely detection, quantification, and attribution of methane emissions from Underground Gas Storage (UGS) facilities is essential for improving confidence in greenhouse gas inventories, enabling emission mitigation by facility operators, and supporting efforts to assess facility integrity and safety. We conducted multiple airborne surveys of the 12 active UGS facilities in California between January 2016 and November 2017 using advan…

  • Assessing fossil fuel CO 2 emissions in California using atmospheric observations and models

    Open AccessHeather Graven, M L Fischer et al.ARTICLEEnvironmental Research Letters2018

    Analysis systems incorporating atmospheric observations could provide a powerful tool for validating fossil fuel CO 2 (ffCO 2 ) emissions reported for individual regions, provided that fossil fuel sources can be separated from other CO 2 sources or sinks and atmospheric transport can be accurately accounted for. We quantified ffCO 2 by measuring radiocarbon ( 14 C) in CO 2 , an accurate fossil-carbon tracer, at nine observation sites in Californi…

  • Satellite observation of tropical forest seasonality

    Open AccessLiang Xu, Sassan Saatchi et al.ARTICLEEnvironmental Research Letters2015

    Determining the seasonality of terrestrial carbon exchange with the atmosphere remains a challenge in tropical forests because of the heterogeneity of ecosystem and climate. The magnitude and spatial variability of this flux are unknown, particularly in Amazonia where empirical upscaling approaches from spatially sparse in situ measurements and simulations from process-based models have been challenged in recent scientific literature. Here, we us…