A5004924406- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Aeolian processes and effects
- Icing and De-icing Technologies
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Smart Materials for Construction
- Air Quality and Health Impacts
- Marine and coastal ecosystems
- Hydraulic Fracturing and Reservoir Analysis
- Atmospheric Ozone and Climate
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Indoor Air Quality and Microbial Exposure
- Freezing and Crystallization Processes
- Reproductive Biology and Fertility
- Innovative Microfluidic and Catalytic Techniques Innovation
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Nanomaterials and Printing Technologies
- Ionosphere and magnetosphere dynamics
- Lichen and fungal ecology
- Microfluidic and Bio-sensing Technologies
- Seismic Imaging and Inversion Techniques
- Viral Infectious Diseases and Gene Expression in Insects
University of Leeds
1997-2024
Abstract. Mineral dust particles from wind-blown soils are known to act as effective ice nucleating in the atmosphere and thought play an important role glaciation of mixed phase clouds. Recent work suggests that feldspars most efficient nucleators minerals commonly present atmospheric mineral dust. However, feldspar group is complex, encompassing a range chemical compositions crystal structures. To further investigate ice-nucleating properties we measured nucleation activities 15...
Abstract. Mineral dust particles are thought to be an important type of ice-nucleating particle (INP) in the mixed-phase cloud regime around globe. While K-rich feldspar (K-feldspar) has been identified as being a particularly component mineral for ice nucleation, it shown that quartz is also relatively ice-nucleation active. Given typically makes up substantial proportion atmospheric desert dust, could potentially glaciation. Here, we survey ability 10 α-quartz samples (the most common...
Abstract A minute fraction of atmospheric particles exert a disproportionate effect on the phase mixed-phase clouds by acting as ice-nucleating (INPs). To understand effects these weather and climate, both now into future, we must first develop quantitative understanding major INP sources worldwide. Previous work has demonstrated that aerosols such desert dusts are globally important INPs, but role biogenic INPs is unclear, with conflicting evidence for their importance. Here, show at...
Ice-nucleating particles (INPs) have the potential to remove much of liquid water in climatically important mid- high-latitude shallow supercooled clouds, markedly reducing their albedo. The INP sources at these latitudes are very poorly defined, but it is known that there substantial dust across high latitudes, such as Iceland. Here, we show Icelandic emissions sporadically an source INPs mid by combining ice-nucleating active site density measurements aircraft-collected samples with a...
Abstract Clouds containing supercooled water are important for both climate and weather, but our knowledge of which aerosol particle types nucleate ice in these clouds is far from complete. Combustion aerosols have strong anthropogenic sources, if were to clouds, they might exert a forcing. Here, we quantified the atmospheric ice‐nucleating (INP) concentrations during United Kingdom's annual Bonfire Night celebrations, characterized by large amounts combustion bonfires fireworks. We used...
Ice-nucleating particles (INPs) play a significant role in the climate and hydrological cycle by triggering ice formation supercooled clouds, thereby causing precipitation affecting cloud lifetimes their radiative properties. However, despite importance, INP often comprise only 1 103–106 ambient particles, making it difficult to ascertain predict type, source, concentration. The typical techniques for quantifying concentrations tend be highly labour-intensive, suffer from poor time...
A microfluidic platform for the analysis of atmospheric ice-nucleating particles (INPs) <italic>via</italic> freezing thousands droplets in continuous flow.
Cryopreservation of mammalian cells has to date typically been conducted in cryovials, but there are applications where cryopreservation primary multiwell plates would be advantageous. However excessive supercooling the small volumes liquid each well is inevitable without intervention and tends result high variable cell mortality. Here, we describe a technique for adhered bovine granulosa 96-well by controlled rate freezing using ice nucleation. Inducing nucleation at warm supercooled...
Abstract. Ice-nucleating particles (INPs) affect cloud development, lifetime, and radiative properties, hence it is important to know the abundance of INPs throughout atmosphere. A critical factor in determining lifetime transport their size; however very little size-resolved atmospheric INP concentration information exists. Here we present development application a radio-controlled payload capable collecting aerosol from tethered balloon for primary purpose offline analysis. This payload,...
Abstract. The formation of ice particles in Earth's atmosphere strongly influences the dynamics and optical properties clouds their impacts on climate system. Ice is often triggered heterogeneously by ice-nucleating (INPs) that represent a very low number atmosphere. To date, many sources INPs, such as mineral soil dust, have been investigated identified mid latitudes. Although less known about nucleation at high latitudes, efforts made to identify INPs Arctic boreal environments. In this...
Abstract. Cloud properties are strongly influenced by ice formation; hence, we need to understand the sources of ice-nucleating particles (INPs) around globe. Boreal forests known as bioaerosol, and recent work indicates that these dominate INP spectra above −24 °C. To quantify population at temperatures below °C, deployed a portable cloud expansion chamber (PINE) in Finnish boreal forest from 13 March 2018 11 May 2018. Using 6 min time resolution PINE data, present several lines evidence...
Abstract. Low concentrations of ice-nucleating particles (INPs) are thought to be important for the properties mixed-phase clouds, but their detection is challenging. Hence, there a need instruments where INP less than 0.01 L−1 can routinely and efficiently determined. The use larger volumes suspension in drop assays increases sensitivity an experiment rarer INPs or active sites due increase aerosol surface area particulates per droplet. Here we describe characterise InfraRed-Nucleation by...
Abstract. African mineral dust is transported many thousands of kilometres from its source regions, and, because ability to nucleate ice, it plays a major role in cloud glaciation around the globe. The ice-nucleating activity desert influenced by mineralogy, which varies substantially between regions and across particle sizes. However, models often assumed that (expressed as active sites per unit surface area function temperature) atmospheric same everywhere on Here, we find sampled...
Abstract. Mineral dust particles are thought to be an important type of ice-nucleating particle (INP) in the mixed-phase cloud regime around globe. While K-feldspar has been identified as being a particularly component mineral for ice nucleation, it shown that quartz is also relatively nucleation active. Given typically makes up substantial proportion atmospheric desert could potentially glaciation. Here, we survey ability 10 α-quartz samples (the most common polymorph) when immersed...
Abstract The functioning of the Pacific Ocean—the world's largest ocean—during a warmer‐than‐present paleoclimate state remains underexplored. We present planktonic and benthic foraminiferal stable oxygen (δ 18 O) carbon 13 C) isotope records from Integrated Ocean Drilling Program (IODP) Site U1334 that span Oligocene‐Miocene Transition (OMT) interval, 24.15 to 21.95 million years ago (Ma). reconstruct (sub‐)surface deep‐water conditions provide better constraints on physical chemical...
Abstract. Cloud properties are strongly influenced by ice formation, hence we need to understand the sources of ice-nucleating particles (INPs) around globe. Boreal forests known as bioaerosol and recent work indicates that these dominate INP spectra above -24 °C. To quantify population at temperatures below °C, deployed a portable cloud expansion chamber (PINE) in Finnish boreal forest from March 13, 2018 May 11, 2018. Using 6 min time resolution PINE data, present several lines evidence...
Abstract. While the atmosphere in eastern Mediterranean is part of dust belt, it encounters air masses from Europe, Sea, and Sahara Arabian Desert that bring with them a whole host potential bioaerosol compositions concentrations via long-range transport. The consequential changes populations ice-nucleating particles (INPs), aerosols influence weather climate by triggering freezing supercooled cloud water droplets, including convective systems region, are not so well understood beyond desert...
Abstract. African mineral dust is transported many thousands of kilometres from its source regions and, because ability to nucleate ice, it plays a major role in cloud glaciation around the globe. The ice-nucleating activity desert influenced by mineralogy, which varies substantially between and across particle sizes. However, models often assumed that (expressed as active sites per unit surface area function temperature) atmospheric same everywhere on Here, we find sampled summertime marine...
Abstract. Mineral dust particles from wind-blown soils are known to act as effective ice nucleating in the atmosphere and thought play an important role glaciation of mixed phase clouds. Recent work suggests that feldspars most efficient nucleators minerals commonly present atmospheric mineral dust. However, feldspar group is complex, encompassing a range chemical compositions crystal structures. To further investigate ice-nucleating properties we measured nucleation activities 15...
Abstract. While the atmosphere in Eastern Mediterranean is part of dust belt, it encounters air masses from Europe, Sea, and Sahara Arabian Deserts that bring with them a whole host potential bioaerosol compositions concentrations via long-range transport. The consequential changes populations ice-nucleating particles (INPs), aerosols influence weather climate by triggering freezing supercooled cloud water droplets, including convective systems region, are not so well understood beyond...
Abstract. Low concentrations of ice nucleating particles (INPs) are thought to be important for the properties mixed-phase clouds, but their detection is challenging. While instruments quantify INPs online can provide relatively high time resolution data, they typically cannot very low INP concentrations. Furthermore, typical tend report data at a single defined set conditions. Hence, there need where less than 0.01 L−1 routinely and efficiently determined. The use larger volumes suspension...