A5016505683- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Climate change and permafrost
- Tropical and Extratropical Cyclones Research
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Winter Sports Injuries and Performance
- Neurogenesis and neuroplasticity mechanisms
- Landslides and related hazards
- Aerospace Engineering and Energy Systems
- Adventure Sports and Sensation Seeking
- Methane Hydrates and Related Phenomena
- Icing and De-icing Technologies
- Nerve injury and regeneration
- Axon Guidance and Neuronal Signaling
- Global Energy and Sustainability Research
- Neuropeptides and Animal Physiology
- Precipitation Measurement and Analysis
- Energy Load and Power Forecasting
- Solar Radiation and Photovoltaics
- Geophysics and Gravity Measurements
- Welding Techniques and Residual Stresses
Scripps Institution of Oceanography
2021-2025
University of California, San Diego
2022-2025
Institute of Oceanography
2023
The Ohio State University
1994-2022
Nanjing University
2015-2016
Abstract The Antarctic Peninsula (AP) experienced a new extreme warm event and record-high surface melt in February 2022, rivaling the recent temperature records from 2015 2020, contributing to alarming series of events over this region showing stronger warming compared rest Antarctica. Here, drivers impacts are analyzed detail using range observational modeling data. northern/northwestern AP was directly impacted by an intense atmospheric river (AR) attaining category 3 on AR scale, which...
Abstract Temperature trends across Antarctica over the last few decades reveal strong and statistically significant warming in West Antarctic Peninsula (AP) contrasting with no change overall East Antarctica. However, recent studies have documented cooling AP since late 1990s. This study aims to place temperature changes into a larger spatial temporal perspective by analyzing monthly station-based surface observations 1957 extratropical Southern Hemisphere, along sea (SST) data mean level...
Abstract Between 15 and 19 March 2022, East Antarctica experienced an exceptional heat wave with widespread 30°–40°C temperature anomalies across the ice sheet. This record-shattering event saw numerous monthly records being broken including a new all-time record of −9.4°C on 18 at Concordia Station despite typically transition month to Antarctic coreless winter. The driver for these extremes was intense atmospheric river advecting subtropical/midlatitude moisture deep into interior. scope...
Abstract Between 15 and 19 March 2022, East Antarctica experienced an exceptional heat wave with widespread 30°–40°C temperature anomalies across the ice sheet. In Part I, we assessed meteorological drivers that generated intense atmospheric river (AR) caused these record-shattering anomalies. Here, continue our large collaborative study by analyzing diverse impacts driven AR landfall. These included rain surface melt was recorded along coastal areas, but this outweighed high snowfall...
Abstract The Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) had a special observing period (SOP) that ran from 16 November 2018 to 15 February 2019, chosen span austral warm season months greatest operational activity Antarctic. Some 2,200 additional radiosondes were launched during 3-month SOP, roughly doubling routine program, and network drifting buoys Ocean was enhanced. An evaluation global model forecasts SOP using its data has confirmed extratropical forecast skill lags...
Abstract We calculate a regional surface “melt potential” index (MPI) over Antarctic ice shelves that describes the frequency (MPI-freq; %) and intensity (MPI-int; K) of daily maximum summer temperatures exceeding melt threshold 273.15 K. This is used to determine which are vulnerable melt-induced hydrofracture calculated using near-surface temperature output for each from 1979/80 2018/19 two high-resolution atmospheric model hindcasts (using MetUM HIRHAM5). MPI highest Peninsula (MPI-freq...
Abstract The Antarctica Peninsula (AP) has experienced more frequent and intense surface melting recently, jeopardizing the stability of ice shelves ultimately leading to loss. Among key phenomena that can initiate are atmospheric rivers (ARs) leeside foehn; combined impact ARs foehn led moderate warming over AP in December 2018 record‐breaking February 2022. Focusing on 2022 case, this study uses high‐resolution Polar WRF simulations with advanced model configurations, Reference Elevation...
Abstract The Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) held seven targeted observing periods (TOPs) during 2022 austral winter to enhance atmospheric predictability over Ocean and Antarctica. TOPs 5–10-day duration each featured release additional radiosonde balloons, more than doubling routine sounding program at 24 participating stations run by 14 nations, together with process-oriented observations selected sites. These extra data are evaluated for their impact on...
Abstract West Antarctica (WA), especially the Ross Ice Shelf (RIS), has experienced more frequent surface melting during austral summer recently. The future is likely to see enhanced that will jeopardize stability of ice shelves and cause loss. We investigate four major melt cases over RIS via Polar Weather Research Forecasting (WRF) simulations (4 km resolution) driven by European Centre for Medium‐Range Forecasts (ECMWF) Reanalysis 5th Generation (ERA5) reanalysis data Moderate Resolution...
Abstract The West Antarctic climate is under the combined impact of synoptic and regional drivers. Regional factors have contributed to more frequent surface melting with a similar pattern recently, which accelerates ice loss favors global sea‐level rise. Part I this research identified quantified two leading drivers Ross Ice Shelf (RIS) melting, viz. foehn effect direct marine air advection, based on Polar WRF (PWRF) simulations. In article (Part II), clouds energy balance (SEB) during are...
The Ross Ice Shelf (RIS) buttresses ice streams from the Antarctic continent and restrains grounded sheet flowing into ocean, which is important for stability of sheet. In recent decades, West shelves, including RIS, have experienced more frequent surface melting during summer. We investigated role warm, descending föhn winds in a major melt event that occurred on RIS January 2016. Only few summer events this magnitude been observed since 1979. Backward trajectories area earliest were...
Abstract Forecasting Antarctic atmospheric, oceanic, and sea ice conditions on subseasonal to seasonal scales remains a major challenge. During both the freezing melting seasons current operational ensemble forecasting systems show systematic overestimation of sea-ice edge location. The skill cover prediction is closely related accuracy cloud representation in models, as two are strongly coupled by radiative forcing. In particular, surface downward longwave radiation (DLW) deficits appear be...
Abstract Global reanalyzes are widely used for investigations of Antarctic climate variability and change. The European Centre Medium‐Range Weather Forecasts 5th generation reanalysis (ERA5) is well regarded spans 1940 to today. We investigate whether ERA5 reliably represents the 2‐m air temperature trends across 1940–2022 (83 years) period at seasonal annual time scales. compare temperatures with an observation‐based reconstruction Antarctica (RECON) that has monthly resolution 1958–2022,...
Abstract In March 2019, a strong atmospheric river (AR) originating from the Gulf of Mexico transported abundant moisture inland and fueled record‐breaking bomb cyclone in Colorado, resulting widespread winter weather hazards across several states. Experimental model simulations trajectory analysis indicate that mid‐tropospheric latent heat release (LHR) coincided with strength warm conveyor belt played key role deepening cyclone. The LHR promoted generation lower tropospheric positive...
Atmospheric rivers (AR) are long, narrow, transient corridors of intense atmospheric moisture transport affecting many regions around the world including Antarctica, where they play an important role in surface mass and energy balance. Over Antarctic Peninsula (AP), one most rapidly warming regions, ARs have been increasing frequency intensity causing major heatwaves, anomalous precipitation melt [1,2]. The impact would not be as without global [3] thus it is urgent to understand processes...
Adaptive meshes are pivotal in numerical modeling and simulation, offering a means to efficiently, precisely, flexibly represent intricate physical phenomena, particularly when grappling with their intricacies varying scales. However, the transition from two dimensions (2D) three (3D) poses substantial challenge, as computational demands of dynamically adaptive mesh techniques increase exponentially. Addressing this challenge effectively, we turn cutting-edge realm artificial intelligence...
Abstract Narrow cold‐frontal rain bands (NCFR) often produce short‐duration and high‐intensity precipitation that can lead to flooding debris flow in California (CA). On 27 January 2021, an atmospheric river (AR) associated with intense surface cyclone made landfall over coastal northern CA, which featured a prominent NCFR. This study uses high‐resolution West Weather Research Forecasting simulations accurately resolve the gap core structure of NCFR provide reliable estimations, compensating...
Abstract. Atmospheric rivers (ARs) are the primary mechanism for transporting water vapor from low latitudes to polar regions, playing a significant role in extreme weather both Arctic and Antarctica. With rapidly growing interest ARs during past decade, it is imperative establish an objective framework quantifying strength impact of these scientific research practical applications. The AR scale introduced by Ralph et al. (2019) ranks based on duration conditions intensity integrated...
Abstract. The Ross Ice Shelf, West Antarctica, experienced an extensive melt event in January 2016. We examine the representation of this by HIRHAM5 and MetUM high-resolution regional atmospheric models, as well a sophisticated offline coupled firn model forced with their outputs. results are compared satellite-based estimates days. number days good agreement observations over eastern central sectors ice shelf, while based on own surface schemes considerably underestimated, possibly due to...