Daniel P. Grosvenor
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View article: Different responses of cold-air outbreak clouds to aerosol and ice production depending on cloud temperature
Different responses of cold-air outbreak clouds to aerosol and ice production depending on cloud temperature Open
Aerosol–cloud interactions and ice production processes are important factors that influence mixed-phase cold-air outbreak (CAO) clouds and their contribution to cloud-phase feedback. Recent case studies of CAO events suggest that increase…
View article: Weak influence of anthropogenic emissions on aerosol, cloud, and rain in the wet season of the Amazon rainforest
Weak influence of anthropogenic emissions on aerosol, cloud, and rain in the wet season of the Amazon rainforest Open
Anthropogenic emissions have been shown to affect new particle formation, aerosol concentrations, and clouds. Such effects vary with region, environmental conditions, and cloud types. In the wet season of Amazonia, anthropogenic emissions …
View article: Evaluation of UKESM aerosol size and composition using ATom measurements indicates missing marine aerosol formation mechanisms
Evaluation of UKESM aerosol size and composition using ATom measurements indicates missing marine aerosol formation mechanisms Open
Atmospheric aerosols influence climate through their interactions with radiation and clouds, yet large uncertainties remain in their simulation by global models. This study evaluates the United Kingdom Earth System Model version 1.1 (UKESM…
View article: Assessing modifications to the Abdul-Razzak and Ghan aerosol activation parameterization (version ARG2000) to improve simulated aerosol–cloud radiative effects in the UK Met Office Unified Model (UM version 13.0)
Assessing modifications to the Abdul-Razzak and Ghan aerosol activation parameterization (version ARG2000) to improve simulated aerosol–cloud radiative effects in the UK Met Office Unified Model (UM version 13.0) Open
The representation of aerosol activation is a key source of uncertainty in global composition-climate model simulations of aerosol–cloud interactions. The Abdul-Razzak and Ghan (ARG) activation parameterization is used in several global an…
View article: Impacts of the Icelandic Holuhraun volcanic eruption on cloud properties using regional model cloud-aerosol simulations
Impacts of the Icelandic Holuhraun volcanic eruption on cloud properties using regional model cloud-aerosol simulations Open
Aerosol-cloud interactions remain a significant uncertainty in climate prediction, largely due to the complexity of measuring and modelling these processes. Volcanic eruptions, such as the Holuhraun event in 2014, offer valuable opportunit…
View article: Biosphere–atmosphere related processes influence trace-gas and aerosol satellite–model biases
Biosphere–atmosphere related processes influence trace-gas and aerosol satellite–model biases Open
Biogenic volatile organic compounds (BVOCs), such as isoprene, impact aerosols, ozone and methane, adding uncertainty to assessments of the climate impacts of land cover change. Recent United Kingdom Earth System Model (UKESM) developments…
View article: Observational evidence of strong aerosol fingerprints on clouds and effect on radiative forcing
Observational evidence of strong aerosol fingerprints on clouds and effect on radiative forcing Open
Aerosol-cloud-interactions (ACI) is a leading uncertainty in estimates of their radiative forcing and hence for climate projection. The aerosol radiative forcing obtained from climate models is poorly constrained by observations, because t…
View article: Warming effects of reduced sulfur emissionsfrom shipping
Warming effects of reduced sulfur emissionsfrom shipping Open
The regulation introduced in 2020 that limits the sulfur content in shipping fuel has reduced sulfur emissions over global open oceans by about 80 %. This is expected to have reduced aerosols that both reflect solar radiation directly and …
View article: The influence of Amazonian anthropogenic emissions on new particle formation, aerosol, cloud and surface rain
The influence of Amazonian anthropogenic emissions on new particle formation, aerosol, cloud and surface rain Open
Anthropogenic emissions have been shown to affect new particle formation, aerosol concentrations, and clouds. Such effects vary with region, environmental conditions and cloud types. In the wet season of Amazonia, anthropogenic emissions e…
View article: Biosphere-atmosphere related processes influence trace-gas and aerosol satellite-model biases
Biosphere-atmosphere related processes influence trace-gas and aerosol satellite-model biases Open
Biogenic volatile organic compounds (BVOCs), such as isoprene, impact aerosols, ozone and methane, adding uncertainty to assessments of the climate impacts of land cover change. Recent UK Earth System model (UKESM) developments allow us to…
View article: Different responses of cold-air outbreak clouds to aerosol and ice production depending on cloud temperature
Different responses of cold-air outbreak clouds to aerosol and ice production depending on cloud temperature Open
Aerosol-cloud interactions and ice production processes are important factors that influence mixed-phase cold-air outbreak (CAO) clouds and their contribution to cloud-phase feedback. Our current understanding is that increases in ice-nucl…
View article: Gaps in our understanding of ice-nucleating particle sources exposed by global simulation of the UK Earth System Model
Gaps in our understanding of ice-nucleating particle sources exposed by global simulation of the UK Earth System Model Open
Changes in the availability of a subset of aerosol known as ice-nucleating particles (INPs) can substantially alter cloud microphysical and radiative properties. Despite very large spatial and temporal variability in INP properties, many c…
View article: Warming effects of reduced sulfur emissions from shipping
Warming effects of reduced sulfur emissions from shipping Open
The regulation introduced in 2020 that limits the sulfur content in shipping fuel has reduced sulfur emissions over global open oceans by about 80 %. This is expected to have reduced aerosols that both reflect solar radiation directly and …
View article: Modifying the Abdul-Razzak & Ghan aerosol activation parameterization (version ARG2000) impacts simulated cloud radiative effects (shown in the UK Met Office Unified Model, version 13.0)
Modifying the Abdul-Razzak & Ghan aerosol activation parameterization (version ARG2000) impacts simulated cloud radiative effects (shown in the UK Met Office Unified Model, version 13.0) Open
The representation of aerosol activation is a key source of uncertainty in global composition-climate model simulations of aerosol-cloud interactions. The Abdul-Razzak and Ghan (ARG) activation parameterization is used in several global an…
View article: Comment on egusphere-2024-1538
Comment on egusphere-2024-1538 Open
Abstract. Changes in the availability of a subset of aerosol known as ice-nucleating particles (INPs) can substantially alter cloud microphysical and radiative properties. Despite very large spatial and temporal variability in INP properti…
View article: Gaps in our understanding of ice-nucleating particle sources exposed by global simulation of the UK climate model
Gaps in our understanding of ice-nucleating particle sources exposed by global simulation of the UK climate model Open
Changes in the availability of a subset of aerosol known as ice-nucleating particles (INPs) can substantially alter cloud microphysical and radiative properties. Despite very large spatial and temporal variability in INP properties, many c…
View article: Warming effects of reduced sulfur emissions from shipping
Warming effects of reduced sulfur emissions from shipping Open
The regulation introduced in 2020 that limits the sulfur content in shipping fuel has reduced sulfur emissions over global open oceans by about 80 %. This is expected to have reduced aerosols that both reflect solar radiation directly and …
View article: How Cloud Droplet Number Concentration Impacts Liquid Water Path and Precipitation in Marine Stratocumulus Clouds—A Satellite-Based Analysis Using Explainable Machine Learning
How Cloud Droplet Number Concentration Impacts Liquid Water Path and Precipitation in Marine Stratocumulus Clouds—A Satellite-Based Analysis Using Explainable Machine Learning Open
Aerosol–cloud–precipitation interactions (ACI) are a known major cause of uncertainties in simulations of the future climate. An improved understanding of the in-cloud processes accompanying ACI could help in advancing their implementation…
View article: Effects of long-term changes in anthropogenic aerosol emissions on shortwave radiative flux and cloud variables over the North Pacific
Effects of long-term changes in anthropogenic aerosol emissions on shortwave radiative flux and cloud variables over the North Pacific Open
China's high-intensity anthropogenic emissions have strongly affected regional aerosols, weather and climate over recent decades. Affected by the typical circulations in the Asian monsoon region, aerosols over the North Pacific are closely…
View article: How cloud droplet number concentration impacts liquid water path and precipitation in marine stratocumulus clouds - a satellite-based analysis using explainable machine learning
How cloud droplet number concentration impacts liquid water path and precipitation in marine stratocumulus clouds - a satellite-based analysis using explainable machine learning Open
In this work, a data set comprised of satellite observations and reanalysis data is used in explainable machine learning models to analyse the relationship between the cloud droplet number concentration (Nd), cloud liquid water path (LWP) …
View article: Sensitivity of mixed-phase cold-air outbreak clouds to aerosol-cloud interactions and ice production processes depends on environmental conditions: a comparison between spring and autumn CAO case studies over the Labrador Sea
Sensitivity of mixed-phase cold-air outbreak clouds to aerosol-cloud interactions and ice production processes depends on environmental conditions: a comparison between spring and autumn CAO case studies over the Labrador Sea Open
Aerosol-cloud interactions and ice production processes are important uncertainties in models of mixed-phase cold-air outbreak (CAO) clouds, which are vital for the estimation of cloud-phase feedback. Our model simulation results show that…
View article: Evidence that deliberate marine cloud brightening can be more effective than previously thought
Evidence that deliberate marine cloud brightening can be more effective than previously thought Open
With global warming currently standing at approximately + 1.2 o C, climate change is a pressing global issue. Marine cloud brightening (MCB) proposes injecting aerosols into marine clouds to enhance their reflectivity and thereby planetary…
View article: Identifying climate model structural inconsistencies allows for tight constraint of aerosol radiative forcing
Identifying climate model structural inconsistencies allows for tight constraint of aerosol radiative forcing Open
Aerosol radiative forcing uncertainty affects estimates of climate sensitivity and limits model skill in terms of making climate projections. Efforts to improve the representations of physical processes in climate models, including extensi…
View article: Change from aerosol-driven to cloud-feedback-driven trend in short-wave radiative flux over the North Atlantic
Change from aerosol-driven to cloud-feedback-driven trend in short-wave radiative flux over the North Atlantic Open
Aerosol radiative forcing and cloud–climate feedbacks each have a large effect on climate, mainly through modification of solar short-wave radiative fluxes. Here we determine what causes the long-term trends in the upwelling short-wave (SW…