Dorit Hammerling
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View article: A Bayesian hierarchical model for climate change detection and attribution
A Bayesian hierarchical model for climate change detection and attribution Open
Regression-based detection and attribution methods continue to take a central role in the study of climate change and its causes. Here we propose a novel Bayesian hierarchical approach to this problem, which allows us to address several op…
View article: A comparison of turbulent CFD with Gaussian dispersion models on a methane emission test site
A comparison of turbulent CFD with Gaussian dispersion models on a methane emission test site Open
This article investigates the influence of structures on the atmospheric transport of methane in an outdoor industrial environment, and provides a comparison in the predictive capability of Gaussian dispersion models against a turbulent co…
View article: A Bayesian hierarchical model for methane emission source apportionment
A Bayesian hierarchical model for methane emission source apportionment Open
Reducing methane emissions from the oil and gas sector is a key component of short-term climate action. Emission reduction efforts are often conducted at the individual site-level, where being able to apportion emissions between a finite n…
View article: A fast and lightweight implementation of the Gaussian puff model for near-field atmospheric transport of trace gasses
A fast and lightweight implementation of the Gaussian puff model for near-field atmospheric transport of trace gasses Open
View article: A fast and lightweight implementation of the Gaussian puff model for near-field atmospheric transport of trace gasses
A fast and lightweight implementation of the Gaussian puff model for near-field atmospheric transport of trace gasses Open
Atmospheric dispersion models are a key component for characterizing methane emissions on oil and gas sites. While some model implementations with varying degrees of complexity are available, existing regulatory-grade dispersion models are…
View article: The ensemble consistency test: from CESM to MPAS and beyond
The ensemble consistency test: from CESM to MPAS and beyond Open
The ensemble consistency test (ECT) and its ultrafast variant (UF-ECT) have become powerful tools in the development community for the identification of unwanted changes in the Community Earth System Model (CESM). By characterizing the dis…
View article: puff: Simulate and Visualize the Gaussian Puff Forward Atmospheric Model
puff: Simulate and Visualize the Gaussian Puff Forward Atmospheric Model Open
View article: Intercomparison of Three Continuous Monitoring Systems on Operating Oil and Gas Sites
Intercomparison of Three Continuous Monitoring Systems on Operating Oil and Gas Sites Open
We compare continuous monitoring systems (CMS) from three different vendors on six operating oil and gas sites in the Appalachian Basin using several months of data. We highlight similarities and differences between the three CMS solutions…
View article: Intercomparison of three continuous monitoring systems on operating oil and gas sites
Intercomparison of three continuous monitoring systems on operating oil and gas sites Open
We compare continuous monitoring systems (CMS) from three different vendors on six operating oil and gas sites in the Appalachian Basin using several months of data. We highlight similarities and differences between the three CMS solutions…
View article: Optimizing Point-in-Space Continuous Monitoring System Sensor Placement on Oil and Gas Sites
Optimizing Point-in-Space Continuous Monitoring System Sensor Placement on Oil and Gas Sites Open
We propose a generic, modular framework to optimize the placement of point-in-space continuous monitoring system sensors on oil and gas sites aiming to maximize the methane emission detection efficiency. Our proposed framework substantiall…
View article: Nonstationary Spatial Modeling of Massive Global Satellite Data
Nonstationary Spatial Modeling of Massive Global Satellite Data Open
Earth-observing satellite instruments obtain a massive number of observations every day. Despite their size, such datasets are incomplete and noisy, necessitating spatial statistical inference to obtain complete, high-resolution fields wit…
View article: Multiscale Measurements of Greenhouse Gas Emissions at U.S. Natural Gas Liquefaction Terminals
Multiscale Measurements of Greenhouse Gas Emissions at U.S. Natural Gas Liquefaction Terminals Open
Addressing methane emissions across the liquefied natural gas (LNG) supply chain is key to reducing climate impacts of LNG. Actions to address methane emissions have emphasized the importance of the use of measurement-informed emissions in…
View article: Filling a critical need: a lightweight and fast Gaussian puff model implementation
Filling a critical need: a lightweight and fast Gaussian puff model implementation Open
Atmospheric dispersion models are a key component for characterizing methane emissions on oil and gas sites. While some model implementations with varying degrees of complexity are available, existing regulatory-grade dispersion models are…
View article: Intercomparison of three continuous monitoring systems on operating oil and gas sites
Intercomparison of three continuous monitoring systems on operating oil and gas sites Open
We compare continuous monitoring systems (CMS) from three different vendors on six operating oil and gas sites in the Appalachian Basin using several months of data. We highlight similarities and differences between the three CMS solutions…
View article: Estimating Methane Emission Durations Using Continuous Monitoring Systems
Estimating Methane Emission Durations Using Continuous Monitoring Systems Open
We propose a method for estimating methane emission durations on oil and gas sites, referred to as the Probabilistic Duration Model (PDM), that uses concentration data from continuous monitoring systems (CMS). The PDM probabilistically add…
View article: Optimizing continuous monitoring sensor placement on oil and gas sites
Optimizing continuous monitoring sensor placement on oil and gas sites Open
We propose a generic, modular framework to optimize the placement of continuous monitoring sensors on oil and gas sites aiming to maximize the methane emissions detection efficiency. Our proposed framework substantially expands the problem…
View article: Investigating aerial data pre-analysis schemes and site-level methane emission aggregation methods at LNG facilities
Investigating aerial data pre-analysis schemes and site-level methane emission aggregation methods at LNG facilities Open
Methane measurements at liquefied natural gas (LNG) facilities play an important role in characterizing methane emissions from the natural gas supply chain. The large size and complexity of LNG facilities make quantifying emissions with gr…
View article: Pushing the frontiers in climate modelling and analysis with machine learning
Pushing the frontiers in climate modelling and analysis with machine learning Open
View article: Multi-scale Measurements of Greenhouse Gas Emissions at U.S. Natural Gas Liquefaction Terminals
Multi-scale Measurements of Greenhouse Gas Emissions at U.S. Natural Gas Liquefaction Terminals Open
Addressing methane emissions across the liquefied natural gas (LNG) supply chain is key to reducing climate impacts of LNG. Actions to address methane emissions have emphasized the importance of the use of measurement-informed emissions in…
View article: Estimating methane emission durations using continuous monitoring systems
Estimating methane emission durations using continuous monitoring systems Open
We propose a method for estimating the duration of methane emissions on oil and gas sites, referred to as the Probabilistic Duration Model (PDM), that uses concentration data from continuous monitoring systems (CMS). The PDM probabilistica…
View article: The Ensemble Consistency Test: From CESM to MPAS and Beyond
The Ensemble Consistency Test: From CESM to MPAS and Beyond Open
The Ensemble Consistency Test (ECT) and its Ultra-Fast variant (UF-ECT) have become powerful tools in the development community for the identification of unwanted changes in the Community Earth System Model (CESM). By characterizing the di…
View article: Estimating methane emission durations using continuous monitoring systems
Estimating methane emission durations using continuous monitoring systems Open
A small number of large emissions contribute a significant portion of total emitted methane from the oil and gas sector, making them a critical pathway toward emission reduction. These large emissions are often detected by snapshot measure…
View article: Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems
Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems Open
We propose a modular framework for methane emission detection, localization, and quantification on oil and gas production sites that uses concentration and wind data from point-in-space continuous monitoring systems. The framework leverage…
View article: On a Structural Similarity Index Approach for Floating-Point Data
On a Structural Similarity Index Approach for Floating-Point Data Open
Data visualization is typically a critical component of post-processing analysis workflows for floating-point output data from large simulation codes, such as global climate models. For example, images are often created from the raw data a…
View article: Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems
Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems Open
We propose a generic, modular framework for methane emission event detection, localization, and quantification on oil and gas production sites that uses concentration and wind data collected by point-in-space continuous monitoring systems.…
View article: Toward Multiscale Measurement-Informed Methane Inventories: Reconciling Bottom-Up Site-Level Inventories with Top-Down Measurements Using Continuous Monitoring Systems
Toward Multiscale Measurement-Informed Methane Inventories: Reconciling Bottom-Up Site-Level Inventories with Top-Down Measurements Using Continuous Monitoring Systems Open
Government policies and corporate strategies aimed at reducing methane emissions from the oil and gas sector increasingly rely on measurement-informed, site-level emission inventories, as conventional bottom-up inventories poorly capture t…
View article: Towards multi-scale measurement-informed methane inventories: reconciling bottom-up site-level inventories with top-down measurements using continuous monitoring systems
Towards multi-scale measurement-informed methane inventories: reconciling bottom-up site-level inventories with top-down measurements using continuous monitoring systems Open
Government policies and corporate strategies aimed at reducing methane emissions from the oil and gas sector increasingly rely on measurement-informed emissions inventories, as conventional bottom-up inventories poorly capture temporal var…
View article: Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems
Detection, localization, and quantification of single-source methane emissions on oil and gas production sites using point-in-space continuous monitoring systems Open
We propose a generic, modular framework for emission event detection, localization, and quantification on oil and gas production sites that uses concentration data collected by point-in-space continuous monitoring systems (CMS). The framew…
View article: Comparison of the Gaussian plume and puff atmospheric dispersion models for methane modeling on oil and gas sites
Comparison of the Gaussian plume and puff atmospheric dispersion models for methane modeling on oil and gas sites Open
Characterizing methane emissions on oil and gas sites often relies on a forward model to describe the atmospheric transport of methane. Here we compare two forward models: the Gaussian plume, a commonly used steady-state dispersion model, …
View article: Data-driven evaluation of the Boston marathon qualifying times
Data-driven evaluation of the Boston marathon qualifying times Open
The Boston Marathon is one of the most prestigious running races in the world. From its inception in 1897, popularity grew to a point in 1970 where qualifying times were implemented to cap the number of participants. Currently, women’s qua…