Thomas P. Ackerman
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View article: Earth's Energy Imbalance More Than Doubled in Recent Decades
Earth's Energy Imbalance More Than Doubled in Recent Decades Open
Global warming results from anthropogenic greenhouse gas emissions which upset the delicate balance between the incoming sunlight, and the reflected and emitted radiation from Earth. The imbalance leads to energy accumulation in the atmosp…
View article: Tropical Cirrus in Global‐Storm Resolving Models: 3. Seasonal Changes and TTL Cirrus in the Tropical Western Pacific Using DYAMOND
Tropical Cirrus in Global‐Storm Resolving Models: 3. Seasonal Changes and TTL Cirrus in the Tropical Western Pacific Using DYAMOND Open
Recent advances in computer modeling have spurred the production of several global storm‐resolving models (GSRMs), which explicitly represent atmospheric circulations from convective to global scales. As a result, GSRMs simulate the format…
View article: Tropical Cirrus in Global Storm‐Resolving Models: 1. Role of Deep Convection
Tropical Cirrus in Global Storm‐Resolving Models: 1. Role of Deep Convection Open
Pervasive cirrus clouds in the upper troposphere and tropical tropopause layer (TTL) influence the climate by altering the top‐of‐atmosphere radiation balance and stratospheric water vapor budget. These cirrus are often associated with dee…
View article: Tropical Cirrus in Global Storm‐Resolving Models: 2. Cirrus Life Cycle and Top‐of‐Atmosphere Radiative Fluxes
Tropical Cirrus in Global Storm‐Resolving Models: 2. Cirrus Life Cycle and Top‐of‐Atmosphere Radiative Fluxes Open
Cirrus clouds of various thicknesses and radiative characteristics extend over much of the tropics, especially around deep convection. They are difficult to observe due to their high altitude and sometimes small optical depths. They are al…
View article: Tropical Cirrus in Global Storm-Resolving Models. Part I: Role of Deep Convection
Tropical Cirrus in Global Storm-Resolving Models. Part I: Role of Deep Convection Open
Earth and Space Science Open Archive This work has been accepted for publication in Earth and Space Science. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn more abo…
View article: Tropical Cirrus in Global Storm-Resolving Models. Part II: Cirrus Life Cycle and Top-of-Atmosphere Radiative Fluxes
Tropical Cirrus in Global Storm-Resolving Models. Part II: Cirrus Life Cycle and Top-of-Atmosphere Radiative Fluxes Open
Cirrus clouds of various thicknesses and radiative characteristics extend over much of the tropics, especially around deep convection. They can be difficult to observe due to their high altitude and sometimes small optical depths. They are…
View article: Tropical Cirrus in Global Storm-Resolving Models. Part II: Cirrus Life Cycle and Top-of-Atmosphere Radiative Fluxes
Tropical Cirrus in Global Storm-Resolving Models. Part II: Cirrus Life Cycle and Top-of-Atmosphere Radiative Fluxes Open
Cirrus clouds of various thicknesses and radiative characteristics extend over much of the tropics, especially around deep convection. They can be difficult to observe due to their high altitude and sometimes small optical depths. They are…
View article: Marine heatwaves confirm cloud response to warming in global climate models
Marine heatwaves confirm cloud response to warming in global climate models Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at AGU Advances. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprin…
View article: The efficacy of aerosol–cloud radiative perturbations from near-surface emissions in deep open-cell stratocumuli
The efficacy of aerosol–cloud radiative perturbations from near-surface emissions in deep open-cell stratocumuli Open
Aerosol–cloud radiative effects are determined and quantified in simulations of deep open-cell stratocumuli observed during the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) campaign off the west coast of Chile. …
View article: Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction
Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction Open
The amount of solar constant reduction required to offset the global warming from an increase in atmospheric CO2 concentration is an interesting question with implications for assessing the feasibility of solar geoengineering scenarios and…
View article: The efficacy of aerosol-cloud-radiative perturbations from near-surface emissions in deep open-cell stratocumulus
The efficacy of aerosol-cloud-radiative perturbations from near-surface emissions in deep open-cell stratocumulus Open
Aerosol-cloud-radiative effects are determined and quantified in simulations of deep open-cell stratocumuli observed during the VOCALS-REx campaign off the West coast of Chile. The cloud deck forms in a 1.5 km deep boundary layer with cell…
View article: Evaluation of Radiation and Clouds From Five Reanalysis Products in the Northeast Pacific Ocean
Evaluation of Radiation and Clouds From Five Reanalysis Products in the Northeast Pacific Ocean Open
Atmospheric reanalyses are valuable tools for studying the atmosphere, as they provide temporally and spatially complete coverage of atmospheric variables. However, some regions are susceptible to large biases in reanalysis products due to…
View article: Sensitivities of Simulated Satellite Views of Clouds to Subgrid‐Scale Overlap and Condensate Heterogeneity
Sensitivities of Simulated Satellite Views of Clouds to Subgrid‐Scale Overlap and Condensate Heterogeneity Open
Satellite simulators are often used to account for limitations in satellite retrievals of cloud properties in comparisons between models and satellite observations. The purpose of this framework is to enable more robust evaluation of model…
View article: The Risks of Contracting the Acquisition and Processing of the Nation’s Weather and Climate Data to the Private Sector
The Risks of Contracting the Acquisition and Processing of the Nation’s Weather and Climate Data to the Private Sector Open
We are deeply concerned with the trend toward the purchase of commercial weather and climate data by the National Oceanic and Atmospheric Administration (NOAA) and other government agencies that may follow. One major concern is for the sta…
View article: Global Atmospheric Simulation Using The Super-Parameterized Community Atmosphere Model
Global Atmospheric Simulation Using The Super-Parameterized Community Atmosphere Model Open
A 1-month subset from a global atmospheric simulation using the Super-Parameterized Community Atmosphere Model (SP-CAM), which implements the Multi-scale Modeling Framework (MMF) described in Khairoutdinov and Randall (2001) and Khairoutdi…
View article: Global Atmospheric Simulation Using The Super-Parameterized Community Atmosphere Model
Global Atmospheric Simulation Using The Super-Parameterized Community Atmosphere Model Open
A 1-month subset from a global atmospheric simulation using the Super-Parameterized Community Atmosphere Model (SP-CAM), which implements the Multi-scale Modeling Framework (MMF) described in Khairoutdinov and Randall (2001) and Khairoutdi…
View article: The Risks of Contracting the Acquisition and Processing of the Nation’s Weather and Climate Data to the Private Sector
The Risks of Contracting the Acquisition and Processing of the Nation’s Weather and Climate Data to the Private Sector Open
Here, we are deeply concerned with the trend toward the purchase of commercial weather and climate data by the National Oceanic and Atmospheric Administration (NOAA) and other government agencies that may follow. One major concern is for t…
View article: Changes in clouds and thermodynamics under solar geoengineeringand implications for required solar reduction
Changes in clouds and thermodynamics under solar geoengineeringand implications for required solar reduction Open
The amount of solar constant reduction required to offset the global warming from an increase in atmospheric CO2 concentration is an interesting question with implications for assessing the feasibility of solar geoengineering scenarios and…
View article: Supplementary material to "Changes in clouds and thermodynamics under solar geoengineeringand implications for required solar reduction"
Supplementary material to "Changes in clouds and thermodynamics under solar geoengineeringand implications for required solar reduction" Open
View article: Energy transport, polar amplification, and ITCZ shifts in the GeoMIP G1 ensemble
Energy transport, polar amplification, and ITCZ shifts in the GeoMIP G1 ensemble Open
The polar amplification of warming and the ability of the Intertropical Convergence Zone (ITCZ) to shift to the north or south are two very important problems in climate science. Examining these behaviors in global climate models (GCMs) ru…
View article: Diagnosing Cloud Biases in the GFDL AM3 Model With Atmospheric Classification
Diagnosing Cloud Biases in the GFDL AM3 Model With Atmospheric Classification Open
We define a set of 21 atmospheric states, or recurring weather patterns, for a region surrounding the Atmospheric Radiation Measurement Program's Southern Great Plains site using an iterative clustering technique. The states are defined us…
View article: Designing the Climate Observing System of the Future
Designing the Climate Observing System of the Future Open
Climate observations are needed to address a large range of important societal issues including sea level rise, droughts, floods, extreme heat events, food security, and freshwater availability in the coming decades. Past, targeted investm…
View article: A Specialized Corpus for Film Understanding
A Specialized Corpus for Film Understanding Open
We have developed a cinematic annotation scheme and used that scheme to create a shot-by-shot annotated corpus of similar scenes to aid with research in film understanding. This paper introduces and describes the scheme and the created cor…
View article: Energy transport, polar amplification, and ITCZ shifts in the GeoMIP G1 ensemble
Energy transport, polar amplification, and ITCZ shifts in the GeoMIP G1 ensemble Open
The polar amplification of warming and the ability of the inter-tropical convergence zone (ITCZ) to shift to the north or south are two very important problems in climate science. Examining these behaviors in global climate models (GCMs) r…
View article: Could geoengineering research help answer one of the biggest questions in climate science?
Could geoengineering research help answer one of the biggest questions in climate science? Open
Anthropogenic aerosol impacts on clouds constitute the largest source of uncertainty in quantifying the radiative forcing of climate, and hinders our ability to determine Earth's climate sensitivity to greenhouse gas increases. Representat…
View article: Relevant climate response tests for stratospheric aerosol injection: A combined ethical and scientific analysis
Relevant climate response tests for stratospheric aerosol injection: A combined ethical and scientific analysis Open
In this paper, we focus on stratospheric sulfate injection as a geoengineering scheme, and provide a combined scientific and ethical analysis of climate response tests, which are a subset of outdoor tests that would seek to impose detectab…
View article: Assessing the accuracy of MISR and MISR‐simulated cloud top heights using CloudSat‐ and CALIPSO‐retrieved hydrometeor profiles
Assessing the accuracy of MISR and MISR‐simulated cloud top heights using CloudSat‐ and CALIPSO‐retrieved hydrometeor profiles Open
Satellite retrievals of cloud properties are often used in the evaluation of global climate models, and in recent years satellite instrument simulators have been used to account for known retrieval biases in order to make more consistent c…
View article: Reducing Errors in Satellite Simulated Views of Clouds with an Improved Parameterization of Unresolved Scales
Reducing Errors in Satellite Simulated Views of Clouds with an Improved Parameterization of Unresolved Scales Open
View article: Influence of Synoptic Weather Patterns on Solar Irradiance Variability in Northern Europe
Influence of Synoptic Weather Patterns on Solar Irradiance Variability in Northern Europe Open
Observations have revealed strong variability of shortwave (SW) irradiance at Earth’s surface on decadal time scales, referred to as global dimming and brightening. Previous studies have attributed the dimming and brightening to changes in…
View article: Sensitivity of thin cirrus clouds in the tropical tropopause layer to ice crystal shape and radiative absorption
Sensitivity of thin cirrus clouds in the tropical tropopause layer to ice crystal shape and radiative absorption Open
Subvisible cirrus clouds in the tropical tropopause layer (TTL) play potentially important roles in Earth's radiation budget and in the transport of water into the stratosphere. Previous work on these clouds with 2‐D cloud‐resolving models…