Robert J. Parker
YOU?
Author Swipe
View article: The Potential for Future Satellite Missions to Advance the Arctic Methane Permafrost Challenge (AMPAC)
The Potential for Future Satellite Missions to Advance the Arctic Methane Permafrost Challenge (AMPAC) Open
Permafrost degradation in the Arctic is accelerating and expected to enhance greenhouse gas (GHG) emissions. The Arctic Methane and Permafrost Challenge (AMPAC) was initialized by NASA and ESA as a transatlantic networking action striving …
View article: Evaluating national & urban Indian methane emissions using satellites 
Evaluating national & urban Indian methane emissions using satellites  Open
India ranks as the third-largest methane emitter globally, with methane emissions increasing by 30% since 1990. According to India’s most recent report to the United Nations Framework Convention on Climate Change (UNFCCC), anthropoge…
View article: The Intensifying Threat of Wildfires in the Mediterranean: Quantifying the Role of Climate Change in Extreme Fire Weather Events from the Past, Present to the Future
The Intensifying Threat of Wildfires in the Mediterranean: Quantifying the Role of Climate Change in Extreme Fire Weather Events from the Past, Present to the Future Open
Wildfires are an increasing environmental and societal threat across the Mediterranean region. While the widespread incidence of fires during recent summers has raised significant public concern, the impact of climate change on such events…
View article: Detecting Burned Area Anomalies with Isolation Forest in the Tropics: A Focus on Madagascar 
Detecting Burned Area Anomalies with Isolation Forest in the Tropics: A Focus on Madagascar  Open
Tropical forests are at high risk of dieback due to human-induced disturbances including forest fires, agricultural expansion, and logging. These disturbances can degrade the ecosystems, slow forest recovery, and disrupt the global carbon …
View article: Satellite quantification of methane emissions from South American countries: a high-resolution inversion of TROPOMI and GOSAT observations
Satellite quantification of methane emissions from South American countries: a high-resolution inversion of TROPOMI and GOSAT observations Open
We use 2021 TROPOMI and GOSAT satellite observations of atmospheric methane in an analytical inversion to quantify national methane emissions from South America at up to 25 km × 25 km resolution. From the inversion, we derive optimal poste…
View article: Advancing the Arctic Methane Permafrost Challenge (AMPAC) With Future Satellite Missions
Advancing the Arctic Methane Permafrost Challenge (AMPAC) With Future Satellite Missions Open
Permafrost degradation in the Arctic is accelerating and is forecast to enhance greenhouse gas (GHG) emissions from the large permafrost carbon pool. Earth observation has a key role in determining GHG sources and sinks, and multiple curre…
View article: Inverse modeling of 2010–2022 satellite observations shows that inundation of the wet tropics drove the 2020–2022 methane surge
Inverse modeling of 2010–2022 satellite observations shows that inundation of the wet tropics drove the 2020–2022 methane surge Open
Atmospheric methane concentrations rose rapidly over the past decade and surged in 2020–2022 but the causes have been unclear. We find from inverse analysis of GOSAT satellite observations that emissions from the wet tropics drove the 2010…
View article: Satellite quantification of methane emissions from South American countries: A high-resolution inversion of TROPOMI and GOSAT observations
Satellite quantification of methane emissions from South American countries: A high-resolution inversion of TROPOMI and GOSAT observations Open
We use 2021 TROPOMI and GOSAT satellite observations of atmospheric methane in an analytical inversion to quantify national methane emissions from South America at up to 25 km × 25 km resolution. From the inversion, we derive optimal poste…
View article: Comment on essd-2024-115
Comment on essd-2024-115 Open
Abstract. Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Emissions and atmospheric concentrations of CH4 continue to increase, maintaining CH4 as the …
View article: Assessing methane emissions from collapsing Venezuelan oil production using TROPOMI
Assessing methane emissions from collapsing Venezuelan oil production using TROPOMI Open
Venezuela has long been identified as an area with large methane emissions and intensive oil exploitation, especially in the Lake Maracaibo region, but production has strongly decreased in recent years. The area is notoriously difficult to…
View article: Comment on essd-2024-115
Comment on essd-2024-115 Open
International audience
View article: Probabilistic assessment of extreme fire risk under the impact of climate change
Probabilistic assessment of extreme fire risk under the impact of climate change Open
As major natural hazards, wildfires pose a significant risk to many parts of the world. The occurrence of extensive fires in both hemispheres in recent years has raised important questions about the extent to which the changing nature of s…
View article: Community input for a how-to guide for using fire models.
Community input for a how-to guide for using fire models. Open
We, the fire science community (and friends), are increasingly asked to provide information about drivers and the impact of fire and make fire projections under future climate and land use change. While the current generation of fire model…
View article: Inverse modeling of satellite observations shows that the wet tropics drive the 2010-2022 methane increase
Inverse modeling of satellite observations shows that the wet tropics drive the 2010-2022 methane increase Open
Atmospheric methane concentrations rose rapidly over the past decade and surged in 2020-2022 but the causes are unclear. We find from inverse analysis of GOSAT satellite observations that global methane emissions increased from 500 to 550 …
View article: Assessing methane emissions from collapsing Venezuelan oil production using TROPOMI
Assessing methane emissions from collapsing Venezuelan oil production using TROPOMI Open
Venezuela has long been identified as an area with large methane emissions, especially in the Lake Maracaibo region with intensive oil exploitation, but production has strongly decreased in recent years. The area is notoriously difficult t…
View article: Scenario choice impacts carbon allocation projection at global warming levels
Scenario choice impacts carbon allocation projection at global warming levels Open
We show that the distribution of anthropogenic carbon between the atmosphere, land surface, and ocean differs with the choice of projection scenario even for identical changes in mean global surface temperature. Warming thresholds occur la…
View article: Recent methane surges reveal heightened emissions from tropical inundated areas
Recent methane surges reveal heightened emissions from tropical inundated areas Open
Record breaking atmospheric methane growth rates were observed in 2020 and 2021 (15.2±0.4 and 17.6±0.5ppb yr -1 ), reaching their highest level since the commencement of ground-based observations in the early 1980s.Here we use an ensemble …
View article: A blended TROPOMI+GOSAT satellite data product for atmospheric methane using machine learning to correct retrieval biases
A blended TROPOMI+GOSAT satellite data product for atmospheric methane using machine learning to correct retrieval biases Open
Satellite observations of dry-column methane mixing ratios (XCH4) from shortwave infrared (SWIR) solar backscatter radiation provide a powerful resource to quantify methane emissions in service of climate action. The TROPOspheric Monitorin…
View article: Atmospheric data support a multi-decadal shift in the global methane budget towards natural tropical emissions
Atmospheric data support a multi-decadal shift in the global methane budget towards natural tropical emissions Open
We use the GEOS-Chem global 3-D model and two inverse methods (the maximum a posteriori and ensemble Kalman filter) to infer regional methane (CH4) emissions and the corresponding stable-carbon-isotope source signatures from 2004–2020 acro…
View article: East Asian methane emissions inferred from high-resolution inversions of GOSAT and TROPOMI observations: a comparative and evaluative analysis
East Asian methane emissions inferred from high-resolution inversions of GOSAT and TROPOMI observations: a comparative and evaluative analysis Open
We apply atmospheric methane column retrievals from two different satellite instruments (Greenhouse gases Observing SATellite – GOSAT; TROPOspheric Monitoring Instrument – TROPOMI) to a regional inversion framework to quantify East Asian m…
View article: Comment on amt-2023-47
Comment on amt-2023-47 Open
Abstract. Satellite observations of dry column methane mixing ratios (XCH4) from shortwave infrared (SWIR) solar backscatter radiation provide a powerful resource to quantify methane emissions in service of climate action. The TROPOMI inst…
View article: Methane emissions are predominantly responsible for record-breaking atmospheric methane growth rates in 2020 and 2021
Methane emissions are predominantly responsible for record-breaking atmospheric methane growth rates in 2020 and 2021 Open
The global atmospheric methane growth rates reported by NOAA for 2020 and 2021 are the largest since systematic measurements began in 1983. To explore the underlying reasons for these anomalous growth rates, we use newly available methane …
View article: Observation-derived 2010-2019 trends in methane emissions and intensities from US oil and gas fields tied to activity metrics
Observation-derived 2010-2019 trends in methane emissions and intensities from US oil and gas fields tied to activity metrics Open
The United States is the world’s largest oil/gas methane emitter according to current national reports. Reducing these emissions is a top priority in the US government’s climate action plan. Here, we use a 2010 to 2019 high-resolution inve…
View article: A blended TROPOMI+GOSAT satellite data product for atmospheric methane using machine learning to correct retrieval biases
A blended TROPOMI+GOSAT satellite data product for atmospheric methane using machine learning to correct retrieval biases Open
Satellite observations of dry column methane mixing ratios (XCH4) from shortwave infrared (SWIR) solar backscatter radiation provide a powerful resource to quantify methane emissions in service of climate action. The TROPOMI instrument lau…
View article: Towards a Digital Twin of the Carbon Cycle in Europe
Towards a Digital Twin of the Carbon Cycle in Europe Open
<div> <p><span data-contrast="auto">In recent years, Digital Twins of the Environment are emerging as useful tools for decision support to help address specific, complex environmental problems. We understand a D…
View article: Observed changes in China’s methane emissions linked to policy drivers
Observed changes in China’s methane emissions linked to policy drivers Open
China is set to actively reduce its methane emissions in the coming decade. A comprehensive evaluation of the current situation can provide a reference point for tracking the country’s future progress. Here, using satellite and surfa…
View article: Comment on egusphere-2022-1483
Comment on egusphere-2022-1483 Open
Abstract. The anthropogenic carbon distribution between the atmosphere, land surface and ocean varies significantly with the choice of scenario for identical changes in mean global surface temperature. Moving to a lower CO2 emissions scena…