A5020548095- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Geological Studies and Exploration
- Cryospheric studies and observations
- Ocean Waves and Remote Sensing
- Atmospheric and Environmental Gas Dynamics
- Climate change and permafrost
- Marine and coastal ecosystems
- Oil Spill Detection and Mitigation
- Reservoir Engineering and Simulation Methods
- Arctic and Russian Policy Studies
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Coastal and Marine Dynamics
- Meteorological Phenomena and Simulations
- Geological formations and processes
- Mercury impact and mitigation studies
- Geophysics and Gravity Measurements
- Hydrocarbon exploration and reservoir analysis
- Offshore Engineering and Technologies
- Toxic Organic Pollutants Impact
- Maritime Navigation and Safety
Florida State University
2013-2023
NOAA National Weather Service
2023
National Oceanic and Atmospheric Administration
2023
NOAA National Centers for Environmental Prediction
2023
NOAA National Centers for Environmental Information
2022
Stennis Space Center
2022
Oceanography Society
2016
University of Alaska Fairbanks
2004
Abstract Hydrographic data collected from research cruises, bottom‐anchored moorings, drifting Ice‐Tethered Profilers, and satellite altimetry in the Beaufort Gyre region of Arctic Ocean document an increase more than 6,400 km 3 liquid freshwater content 2003 to 2018: a 40% growth relative climatology 1970s. This fresh water accumulation is shown result persistent anticyclonic atmospheric wind forcing (1997–2018) accompanied by sea ice melt, wind‐forced redirection Mackenzie River discharge...
Between 1948 and 1996, mean annual environmental parameters in the Arctic experienced a well-pronounced decadal variability with two basic circulation patterns: cyclonic anticyclonic alternating at 5 to 7 year intervals. During regimes, low sea-level atmospheric pressure (SLP) dominated over Ocean driving sea ice upper ocean counterclockwise; atmosphere was relatively warm humid, freshwater flux from towards subarctic seas intensified. By contrast, during anticylonic high SLP clockwise....
Abstract As the sea‐ice modeling community is shifting to advanced numerical frameworks, developing new rheologies, and increasing model spatial resolution, ubiquitous deformation features in Arctic sea ice are now being resolved by models. Initiated at Forum for Modeling Observational Synthesis, Sea Ice Rheology Experiment (SIREx) aims evaluating state‐of‐the‐art models using existing metrics understand how simulated fields affected different representations of physics (rheology)...
Abstract Simulating sea ice drift and deformation in the Arctic Ocean is still a challenge because of multiscale interaction floes that compose Sea cover. The Ice Rheology Experiment (SIREx) model intercomparison project Forum Modeling Observational Synthesis (FAMOS). In SIREx, skill metrics are designed to evaluate different recently suggested approaches for modeling linear kinematic features (LKFs) provide guidance small‐scale deformation. These LKFs narrow bands localized can be observed...
Strengths and weakness of remotely sensed winds are discussed, along with the current capabilities for sensing stress. Future missions briefly mentioned. The observational needs a wide range wind stress applications provided. These strongly support short list desired future constellations.
Abstract Accelerating since the early 1990s, Greenland Ice Sheet mass loss exerts a significant impact on thermohaline processes in sub‐Arctic seas. Surplus freshwater discharge from comparable volume to amount of present during Great Salinity Anomaly events, could spread and accumulate seas, influencing convective there. However, hydrographic observations Labrador Sea Nordic Seas, where freshening signal might be expected propagate, do not show persistent upper ocean last two decades. This...
The cumulative Greenland freshwater flux anomaly has exceeded 5,000 km3 since the 1990s. volume of this surplus is expected to cause substantial freshening in North Atlantic. Analysis hydrographic observations subpolar seas reveals signals 2010s. sources are yet be determined. In study, relationship between and tested by analyzing propagation its impact on salinity Atlantic based observational data numerical experiments with without runoff. A passive tracer continuously released during...
The rapidly changing climate and ongoing shifts in the ocean environment are putting stress on marine ecosystems, threatening economically valuable resources they provide impacting people, businesses, economies. In response to challenges posed by variability change nation’s fisheries, coastal communities, economy, Climate, Ecosystems, Fisheries Initiative (CEFI) has been established. CEFI is a collaborative initiative across National Oceanic Atmospheric Administration (NOAA) aimed...
Numerical model experiments are conducted to address the previously unexplained anomalously high storm surge along Florida coast of Apalachee Bay during Hurricane Dennis (2005). The 2–3 m observed this cannot be obviously explained by relatively weak local winds over bay 275 km east center. Realistic and idealized numerical demonstrate that along‐shore center built a sea level anomaly which traveled northward as topographic Rossby wave. wave was amplified moved nearly parallel shelf at...
Abstract Five quantitative methodologies (metrics) that may be used to assess the skill of sea ice models against a control field are analyzed. The Absolute Deviation, Root‐Mean‐Square Mean Displacement, Hausdorff Distance, and Modified Distance. employed quantify similarity between spatial distribution simulated scalar fields providing measures model performance. To analyze their response dissimilarities in two‐dimensional (contours), metrics undergo sensitivity tests (scale, rotation,...
Abstract Three simulations of the circulation in Gulf Mexico (the “Gulf”) using different numerical general models are compared with results recent large-scale observational campaigns conducted throughout deep (>1500 m) Gulf. Analyses these observations have provided new understanding mean features and variability Important include cyclonic flow along continental slope, western Gulf, a counterrotating pair cells under Loop Current region, cell to south this pair. These dominant...
This study presents results from numerical model experiments with a high-resolution regional forecast system to evaluate predictability of the Loop Current (LC) and assess added value different types observations. The impact surface versus subsurface observations as well combinations spatial coverage on forecasts LC variability. use real (observing experiments) synthetic derived independent simulation experiments). Model is assessed based saturated error growth model. computed for sea height...
This paper presents a mechanism of decadal variability in the Artic Ocean–GIN Sea (Greenland, Iceland and Norwegian Seas) atmosphere‐ice‐ocean system. We hypothesize that Arctic is regulated by heat freshwater exchange between Ocean GIN Sea. The interaction basins weak during anticyclonic circulation regimes (low AO/NAO) strong cyclonic (high AO/NAO). Regime shifts are controlled system itself through oceanic atmospheric gradients (dynamic height surface air temperature) increase regime...
Concurrent measurements by satellite tracked drifters of different hull and drogue configurations coastal high-frequency radar reveal substantial differences in estimates the near-surface velocity. These are important for understanding predicting material transport on ocean surface as well vertical structure currents. current observations were obtained during a field experiment northern Gulf Mexico intended to test new ultra-thin drifter design. During experiment, thirty small cylindrical...
Rapid Arctic warming drives profound change in the marine environment that have significant socio-economic impacts within and beyond, including climate weather hazards, food security, transportation, infrastructure planning resource extraction. These concerns drive efforts to understand predict environmental motivate development of an Region Component Global Ocean Observing System (ARCGOOS) capable collecting broad, sustained observations needed support these endeavors. This paper provides a...
Author Posting. © The Oceanography Society, 2016. This article is posted here by permission of Society for personal use, not redistribution. definitive version was published in 29, no. 3 (2016): 96–107, doi:10.5670/oceanog.2016.74.
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Oceans. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Sea Ice Rheology Experiment (SIREx), Part II: Evaluating simulated linear kinematic features high-resolution sea-ice simulationsAuthorsNils...
The Loop Current (LC), which is the main mesoscale dynamic feature of Gulf Mexico (GoM), has a major impact on circulation and its variability in interior Gulf. LC highly variable feature. It changes shape from short jet connecting two openings GoM an almost straight line ("retracted phase") to long loop invading most eastern part ("extended phase"). When it extended phase, can shed large anticyclonic eddies, called Eddies, then migrate western GoM. In this study, processes controlling...