A5088061527- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Ocean Waves and Remote Sensing
- Atmospheric aerosols and clouds
- Astro and Planetary Science
- Tropical and Extratropical Cyclones Research
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- Atmospheric chemistry and aerosols
- Seismic Waves and Analysis
- Inertial Sensor and Navigation
- Oceanographic and Atmospheric Processes
- Planetary Science and Exploration
- Coastal and Marine Dynamics
- Advanced Frequency and Time Standards
- Geophysics and Sensor Technology
- Astronomical Observations and Instrumentation
- Drilling and Well Engineering
- Aerospace Engineering and Energy Systems
University of Bath
2016-2025
University of Leeds
2017-2021
People's Liberation Army No. 150 Hospital
2018
National University of Defense Technology
2018
Abstract The January 2022 Hunga Tonga–Hunga Ha’apai eruption was one of the most explosive volcanic events modern era 1,2 , producing a vertical plume that peaked more than 50 km above Earth 3 . initial explosion and subsequent triggered atmospheric waves propagated around world multiple times 4 A global-scale wave response this magnitude from single source has not previously been observed. Here we show details response, using comprehensive set satellite ground-based observations to quantify...
Abstract. Nearly all general circulation models significantly fail to reproduce the observed behaviour of southern wintertime polar vortex. It has been suggested that these biases result from an underestimation gravity wave drag on atmosphere at latitudes near 60° S, especially around "hot spot" intense fluxes above mountainous Southern Andes and Antarctic peninsula. Here, we use Global Positioning System radio occultation (GPS-RO) data COSMIC satellite constellation determine properties...
Abstract Atmospheric gravity waves (GWs) are key drivers of the atmospheric circulation, but their representation in general circulation models (GCMs) is challenging, leading to significant biases middle circulations. Unresolved GW momentum transport GCMs must be parameterized, global directional observations needed constrain this. Here we present an 18‐year climatology stratospheric flux (GWMF) from AIRS/Aqua 3‐D satellite during 2002 2019. Striking hemispheric asymmetries found at high...
Abstract We simulate the gravity waves (GWs) and traveling ionospheric disturbances (TIDs) created by Hunga Tonga‐Hunga Ha'apai (hereafter “Tonga”) volcanic eruption on 15 January 2022 at ∼04:15 UT. calculate primary GWs forces/heatings generated where they dissipate with MESORAC, secondary HIAMCM, TIDs SAMI3. find that medium large‐scale (MSTIDs LSTIDs) are induced GWs, horizontal phase speeds c H ≃ 100–750 m/s, wavelengths λ 600–6,000 km, ground‐based periods τ r 30 min to 3 hr. The LSTID...
Abstract. Gravity waves (GWs) transport momentum and energy in the atmosphere, exerting a profound influence on global circulation. Accurately measuring them is thus vital both for understanding atmosphere developing next generation of weather forecasting climate prediction models. However, it has proven very difficult to measure full set GW parameters from satellite measurements, which are only suitable observations with coverage. This particularly critical at latitudes close 60° S, where...
Abstract. Atmospheric gravity waves play a key role in the transfer of energy and momentum between layers Earth's atmosphere. However, nearly all general circulation models (GCMs) seriously under-represent fluxes at latitudes near 60∘ S, which can lead to significant biases. A prominent example this is “cold pole problem”, where modelled winter stratospheres are unrealistically cold. There thus need for large-scale measurements wave indeed globally, test constrain GCMs. Such notoriously...
Abstract Aeolus is the first Doppler wind lidar in space. It provides unique high‐resolution measurements of horizontal sparsely observed upper‐troposphere/lower‐stratosphere (UTLS), with global coverage. In this study, Aeolus' ability to resolve atmospheric gravity waves (GWs) demonstrated. The accurate representation these small‐scale vital properly simulate dynamics weather and climate models. a case study over Andes, GW show coherent phase structure from surface lower stratosphere,...
Earth and Space Science Open Archive This is a preprint has not been peer reviewed. ESSOAr venue for early communication or feedback before review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go to new versionTonga eruption triggered waves propagating globally from surface edge of spaceAuthorsCorwinWrightiDNeilHindleyM....
Abstract Gravity waves (GWs) are key drivers of atmospheric circulation. Understanding their sources and propagation is essential to improving weather climate models. We apply a 3D Stockwell Transform 1 month stratospheric temperature data from NASA's Atmospheric InfraRed Sounder obtain GW measurements parameters. use ray‐tracing methods determine the characteristics these GWs over entire Southern Ocean. trace 1.28 million per day for June 2010. Our analysis suggests that ground‐based around...
Abstract. The stratosphere can be a source of predictability for surface weather on timescales several weeks to months. However, the potential predictive skill gained from stratospheric variability limited by biases in representation processes and coupling with climate forecast systems. This study provides first systematic identification model across wide range subseasonal It is found that many systems considered exhibit warm global-mean temperature lower middle stratosphere, too strong/cold...
Abstract. The Hunga Tonga–Hunga Ha′apai volcano erupted on 15 January 2022, launching Lamb waves and gravity into the atmosphere. In this study, we present results using 13 globally distributed meteor radars identify volcanogenic in mesospheric/lower thermospheric winds. Leveraging High-Altitude Mechanistic general Circulation Model (HIAMCM), compare global propagation of these waves. We observed an eastward-propagating wave packet with phase speed 240 ± 5.7 m s−1 a westward-propagating...
Abstract. Gravity waves in the terrestrial atmosphere are a vital geophysical process, acting to transport energy and momentum on wide range of scales couple various atmospheric layers. Despite importance these waves, many studies date have often exhibited very dissimilar results, it remains unclear whether differences primarily instrumental or methodological. Here, we address this problem by comparing observations made diverse most widely used gravity-wave-resolving instruments common...
Abstract. Gravity waves (GWs) play a crucial role in the dynamics of earth's atmosphere. These couple lower, middle and upper atmospheric layers by transporting depositing energy momentum from their sources to great heights. The accurate parameterisation GW flux is key importance general circulation models but requires measurement properties, which has proved challenging. For more than decade, nadir-viewing Atmospheric Infrared Sounder (AIRS) aboard NASA's Aqua satellite made global,...
Abstract Gravity waves play a critical role in transporting energy and momentum between the troposphere, stratosphere, mesosphere. Satellite measurements provide powerful tool to investigate these across globe. However, many present methods cannot yield reliable estimates of wave fluxes or directions fluxes. Here we new method which addresses this problem by combining observations from Atmospheric Infrared Sounder (AIRS) Microwave Limb (MLS) three dimensions. The allows direct estimation...
Abstract. The mesosphere and lower thermosphere (MLT) is a dynamic layer of the earth's atmosphere. This region marks interface at which neutral atmosphere dynamics begin to influence upper ionosphere. However, our understanding this ability accurately simulate it in global circulation models (GCMs) limited by lack observations, especially remote locations. To end, meteor radar was deployed from 2016 2020 on mountainous island South Georgia (54∘ S, 36∘ W) Southern Ocean. In study we use...
The mesospheric polar vortex (MPV) plays a critical role in coupling the atmosphere-ionosphere system, so its accurate simulation is imperative for robust predictions of thermosphere and ionosphere. While stratospheric widely understood characterized, much less well-known observed, short-coming that must be addressed to improve predictability winter MPV facilitates top-down via communication high energy particle precipitation effects from down stratosphere, though details this mechanism are...
The TEAMx programme is a coordinated international research focusing on improving our understanding of exchange processes in the atmosphere over mountains and evaluating their representation numerical weather prediction (NWP) climate models. features several observational modelling strategies conducted by nationally funded projects centred European Alps, including 6-week extended periods (EOPs) both summer winter 2025. In this presentation, we present first results from UK-funded TEAMx-FLOW...
Atmospheric gravity waves vary hugely in scale; with horizontal wavelengths ranging from a few to thousands of km. Typically, are smaller than model grid-size and as result, their effects parametrised instead being explicitly resolved. However, recent computational scientific advancements have allowed for the development higher resolution global-scale models. These models resolutions order km around 1km vertical stratosphere. At such scales, it should principle be possible accurately...
Abstract Long‐term variability and tendencies in monthly mean semidiurnal tide (12‐hr) zonal (U 12 ) meridional (V winds are investigated northern polar mesosphere lower thermosphere (MLT; ∼80–100 km) using meteor radar observations during 1999–2022 over Esrange (67.9°N, 21.1°E). The climatological of U V amplitudes peak (up to ∼35 m/s) winter (December–February) above ∼90–95 km with secondary maxima late summer/early autumn (August–September), however the amplitude is larger than . exhibit...
Abstract Previous studies based on satellite observations and model simulations have revealed a significant correlation between intense stratospheric gravity wave (GW) activity hurricane intensification. This research further investigated the underlying mechanism of this by analyzing properties propagation characteristics GWs excited Hurricane Joaquin Weather Research Forecasting simulation. By employing 3‐D Stockwell analysis method, we found that during intensification display relatively...
Abstract. Atmospheric reanalyses are data-assimilating weather models which widely used as proxies for the true state of atmosphere in recent past. This is particularly case stratosphere, where historical observations sparse. But how realistic these stratospheric reanalyses? Here, we resample temperature data from six modern (CFSR, ERA-5, ERA-Interim, JRA-55, JRA-55C and MERRA-2) to produce synthetic satellite observations, directly compare retrieved temperatures COSMIC, HIRDLS SABER...
Abstract. Major sudden stratospheric warmings (SSWs) are extreme dynamical events where the usual strong westerly winds of polar vortex temporarily weaken or reverse and temperatures rise by tens kelvins over just a few days remain so for an extended period. Via modification atmosphere below them, SSWs believed to be key contributor winter weather at surface following weeks. SSW-induced changes wind structure have previously been studied in models reanalyses localised measurements such as...
Abstract Gravity waves (GWs) play an important role in the dynamics and energetics of mesosphere. Geomagnetic activity is a known source GWs upper atmosphere. However, how deep effects geomagnetic induced penetrate into mesosphere remains open question. We use temperature measurements from SABER/TIMED instrument between 2002 2018 to study variations mesospheric GW following intense disturbances identified by AE Dst indices. By considering several case studies, we show for first time that...
Abstract. The quasi-biennial oscillation (QBO) is the most important phenomenon in tropical stratosphere. It mainly driven by small-scale gravity waves. Still, representation of QBO models challenging because waves are not well resolved and majority parametrization schemes limited to vertical propagation only One solution this use high-resolution satellite observations understand wave (GW) forcing on QBO. However, results can vary from one observation another due unique observational filter...