John R Worden

Dados Biográficos

ID7478574
NOMEJohn R Worden
PRENOMESJohn R
SOBRENOMEWorden
ASSINATURAWORDEN J R
AFILIAÇÕESJet Propulsion Laboratory
ORCID0000-0003-0257-9549
VERIFICADOSim
TOTAL DE OBRAS7
TOTAL DE CITAÇÕES0
TOTAL COMO AUTOR7
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO2017
ANO MAIS RECENTE DE PUBLICAÇÃO2025
ÍNDICE H0

  • Satellite methane and ammonia observations consistently show substantial increases in pan-tropical livestock emissions

    Open AccessGang Tang, Yuzhong Zhang et al.ARTICLEEnvironmental Research Letters2025

    The inverse analysis of atmospheric observations has become a critical tool for constraining methane (CH 4 ) fluxes and detecting their temporal changes. However, attributing inferred CH 4 fluxes to specific source sectors often relies heavily on prior information and assumptions, introducing uncertainties. Incorporating co-emitted species into top–down analyzes can provide additional observational constraints for more accurate source attribution…

  • 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 net life-cycle greenhouse gas emissions intensities from gas and coal at varying methane leakage rates

    Open AccessDeborah Gordon, Frances Reuland et al.ARTICLEEnvironmental Research Letters2023

    The net climate impact of gas and coal life-cycle emissions are highly dependent on methane leakage. Every molecule of methane leaked alters the climate advantage because methane warms the planet significantly more than CO 2 over its decade-long lifetime. We find that global gas systems that leak over 4.7% of their methane (when considering a 20-year timeframe) or 7.6% (when considering a 100 year timeframe) are on par with life-cycle coal emissi…

  • 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…

  • Attribution of the 2020 surge in atmospheric methane by inverse analysis of Gosat observations

    Open AccessZhen Qu, Daniel Jacob et al.ARTICLEEnvironmental Research Letters2022

    Atmospheric methane mixing ratio rose by 15 ppbv between 2019 and 2020, the fastest growth rate on record. We conduct a global inverse analysis of 2019–2020 Greenhouse Gases Observing Satellite observations of atmospheric methane to analyze the combination of sources and sinks driving this surge. The imbalance between sources and sinks of atmospheric methane increased by 31 Tg a −1 from 2019 to 2020, representing a 36 Tg a −1 forcing (direct chan…

  • Detection of fossil fuel emission trends in the presence of natural carbon cycle variability

    Open AccessYi Yin, K W Bowman et al.ARTICLEEnvironmental Research Letters2019

    Atmospheric CO 2 observations have the potential to monitor regional fossil fuel emission (FFCO 2 ) changes to support carbon mitigation efforts such as the Paris Accord, but they must contend with the confounding impacts of the natural carbon cycle. Here, we quantify trend detection time and magnitude in gridded total CO 2 fluxes—the sum of FFCO 2 and natural carbon fluxes—under an idealized assumption that monthly total CO 2 fluxes can be perfe…

  • Decadal-scale trends in regional aerosol particle properties and their linkage to emission changes

    Open AccessBin Zhao, Jonathan H Jiang et al.ARTICLEEnvironmental Research Letters2017

    Understanding long-term trends in aerosol loading and properties is essential for evaluating the health and climatic effects of these airborne particulates as well as the effectiveness of pollution control policies. While many studies have used satellite data to examine the trends in aerosol optical depth (AOD), very few have investigated the trends in aerosol properties associated with particle size, morphology, and light absorption. In this stu…