William Sweet

ORCID: 0000-0002-0149-8336
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About
Contact & Profiles
Research Areas
  • Tropical and Extratropical Cyclones Research
  • Geophysics and Gravity Measurements
  • Oceanographic and Atmospheric Processes
  • Climate variability and models
  • Coastal and Marine Dynamics
  • Flood Risk Assessment and Management
  • Coastal and Marine Management
  • Global Energy and Sustainability Research
  • Ocean Waves and Remote Sensing
  • Atmospheric and Environmental Gas Dynamics
  • Climate Change and Environmental Impact
  • Methane Hydrates and Related Phenomena
  • Global Energy Security and Policy
  • Marine and coastal ecosystems
  • Marine and fisheries research
  • demographic modeling and climate adaptation
  • Climate Change Policy and Economics
  • Coral and Marine Ecosystems Studies
  • Geology and Paleoclimatology Research
  • Infrastructure Resilience and Vulnerability Analysis
  • Climate Change Communication and Perception
  • Environmental Policies and Emissions
  • Electric Power System Optimization
  • Ocean Acidification Effects and Responses
  • Integrated Energy Systems Optimization

NOAA National Ocean Service
2014-2025

National Oceanic and Atmospheric Administration
2016-2025

NOAA Center for Operational Oceanographic Products & Services
2011-2024

NOAA Oceanic and Atmospheric Research
2014-2021

North Carolina State University
2007-2014

Optica
2013

Northwestern Polytechnical University
2012

Kyoto Institute of Technology
2008

Institut National Polytechnique de Lorraine
2007

Université de Lorraine
2007

The Sea Level Rise and Coastal Flood Hazard Scenarios Tools Interagency Task Force, jointly convened by the U.S. Global Change Research Program (USGCRP) National Ocean Council (NOC), began its work in August 2015. Force has focused efforts on three primary tasks: 1) updating scenarios of global mean sea level (GMSL) rise, 2) integrating with regional factors contributing to change for entire coastline, 3) incorporating these regionally appropriate within coastal risk management tools...

10.7289/v5/tr-nos-coops-083 article EN 2017-01-01

Relative sea level rise (RSLR) has driven large increases in annual water exceedances (duration and frequency) above minor (nuisance level) coastal flooding elevation thresholds established by the National Weather Service (NWS) at U.S. tide gauges over last half-century. For threshold levels below 0.5 m high tide, rates of are accelerating along East Gulf Coasts, primarily from evolution tidal distributions to higher elevations impinging on flood threshold. These accelerations quantified...

10.1002/2014ef000272 article EN cc-by-nc-nd Earth s Future 2014-12-01

Attribution of extreme events is a challenging science and one that currently undergoing considerable evolution. In this paper are 19 analyses by 18 different research groups, often using quite methodologies, 12 occurred in 2012. addition to investigating the causes these events, multiple four high temperatures United States, record low levels Arctic sea ice, heavy rain northern Europe eastern Australia, provide an opportunity compare contrast strengths weaknesses various methodologies. The...

10.1175/bams-d-13-00085.1 article EN Bulletin of the American Meteorological Society 2013-09-01

Abstract Mean sea level has risen tenfold in recent decades compared to the most millennia, posing a serious threat for population and assets flood‐prone coastal zones over next century. An increase frequency of nuisance (minor) flooding also been reported due reduced gap between high tidal datums flood stage, rate rise (SLR) is expected based on current trajectories anthropogenic activities greenhouse gases emissions. Nuisance (NF), however nondestructive, causes public inconvenience,...

10.1002/2015gl066072 article EN Geophysical Research Letters 2015-10-27

Abstract The cooccurrence of coastal and riverine flooding leads to compound events with substantial impacts on people property in low‐lying areas. Climate change could increase the level flood hazard through higher extreme sea levels river flows. Here, a bivariate assessment method is proposed estimate coastal‐riverine frequency under current future climate conditions. A copula‐based approach used joint return period (JRP) floods by incorporating sea‐level rise (SLR) changes peak flows into...

10.1029/2021ef002055 article EN Earth s Future 2021-05-01

Coastal vertical land motion (VLM), including uplift and subsidence, can greatly alter relative sea level projections flood mitigations plans. Yet, current projection frameworks, such as the IPCC Sixth Assessment Report, often underestimate VLM by relying on regional linear estimates. Using high-resolution (90-meter) satellite data from 2015 to 2023, we provide local estimates for California assess their contribution rise both now in future. Our findings reveal that substantially understate...

10.1126/sciadv.ads8163 article EN cc-by-nc Science Advances 2025-01-29
Jean-François Crétaux William Sweet Jake Crouch Taro Takahashi Stuart A. Cunningham and 95 more Michael A.P. Taylor Richard de Jeu M. Tedesco Mesut Demircan Jean‐Noël Thépaut Chris Derksen Wassila M. Thiaw Howard J. Diamond P. R. Thompson E. J. Dlugokencky Peter Thorne Kathleen Dohan Mary‐Louise Timmermans A. J. Dolman Skie Tobin Wouter Dorigo John M. Toole D. S. Drozdov Katja Trachte Claude Duguay Blair Trewin Ellsworth G Dutton Ricardo M. Trigo G. S. Dutton Adrian Trotman J. W. Elkins C. Tucker H. E. Epstein Yusuf Ulupinar J. S. Famiglietti Roderik S. W. van de Wal Odile Hembise Fanton d’Andon Guido R. van der Werf Richard A. Feely Robert Vautard B M Fekete Gary Votaw Chris Fenimore Wolfgang Wagner Diego Fernández‐Prieto John Wahr Erik Fields D. A. Walker Vitali Fioletov J. Brandon Walsh Ryan L. Fogt Chunzai Wang Chris K. Folland Junhong Wang Michael J. Foster Lei Wang Eleanor Frajka‐Williams Menghua Wang Bryan A. Franz Sheng-Hung Wang Karen E. Frey Rik Wanninkhof S. M. Frith Scott C. Weaver И. Е. Фролов Mark Weber Gerald V. Frost Thomas J. Weingartner Catherine Ganter Robert A. Weller Silvia L. Garzoli Frank Wentz Wilson Gitau R. Whitewood Karin Gleason Anne C. Wilber Nadine Gobron Kate M. Willett Stanley B. Goldenberg W. Williams Gustavo Goñi J. K. Willis Idelmis Gonzalez-Garcia R. C. Wilson Nivaldo Gonzalez-Rodriguez G. Wolken Simon Good Takmeng Wong Philippe Goryl Rebecca Woodgate Jonathan Gottschalck Alex J. Wovrosh Célia M. Gouveia Yan Xue Margarita C. Gregg Ryuji Yamada Georgina M. Griffiths Michiyo Yamamoto‐Kawai Valentina Grigoryan James A. Yoder

Editors note: For easy download the posted pdf of State Climate for 2011 is a very low-resolution file. A high-resolution copy report available by clicking here. Please be patient as it may take few minutes file to download. Supplemental figures and datasets are

10.1175/2012bamsstateoftheclimate.1 article EN Bulletin of the American Meteorological Society 2012-07-01

Sea-level rise sits at the frontier of usable climate change research, because it involves natural and human systems with long lags, irreversible losses, deep uncertainty. For example, many measures to adapt sea-level involve infrastructure land-use decisions, which can have multigenerational lifetimes will further influence responses in both systems. Thus, science has increasingly grappled implications (1) uncertainty future system projections, particularly emissions ice sheet dynamics; (2)...

10.1029/2018ef001145 article EN cc-by-nc-nd Earth s Future 2019-10-16

For many climate change impacts such as drought and heat waves, global national frameworks for services are providing ever more critical support to adaptation activities. Coastal zones especially in need of adaptation, they increasingly threatened by sea level rise its impacts, submergence, flooding, shoreline erosion, salinization wetland change. In this paper, we examine how annual multi-decadal projections can be used within coastal (CCS). To end, review the current state-of-the art US,...

10.3390/jmse5040049 article EN cc-by Journal of Marine Science and Engineering 2017-10-16

Abstract Flood exposure is increasing in coastal communities due to rising sea levels. Understanding the effects of level rise (SLR) on frequency and consequences flooding subsequent social economic impacts utmost importance for policymakers implement effective adaptation strategies. Effective strategies may consider from cumulative losses minor as well acute major events. In present study, a statistically coherent Mixture Normal‐Generalized Pareto Distribution model was developed, which...

10.1029/2018ef001089 article EN cc-by-nc-nd Earth s Future 2019-02-01

Tidal floods (i.e., “nuisance” flooding) are occurring more often during seasonal high tides or minor wind events, and the frequency is expected to increase dramatically in coming decades. During these flood coastal communities’ roads impassable difficult pass, thus impacting routine transport needs. This study identifies vulnerable quantifies risk from nuisance flooding Eastern United States by combining public road information Federal Highway Administration’s Performance Monitoring System...

10.1177/0361198118756366 article EN Transportation Research Record Journal of the Transportation Research Board 2018-03-13

ABSTRACT: Bank full hydraulic geometry relationships relate stream channel to watershed size for specific physiographic regions. This paper presents bank and recurrence intervals the Southeastern Plain coercion flat woods subtype of Middle Atlantic Coastal ecoregion found within North Carolina's province. Cross‐sectional longitudinal survey data from gated unpaged streams were used compute dimension profile information. Power functions developed, relating drainage area discharge,...

10.1111/j.1752-1688.2003.tb04411.x article EN JAWRA Journal of the American Water Resources Association 2003-08-01

Abstract. The Florida Current is the headwater of Gulf Stream and a component North Atlantic western boundary current from which geostrophic balance between sea surface height mass transport directly influence coastal levels along Straits. A linear regression daily estimates does not find significant change in over last decade; however, nonlinear trend extracted empirical mode decomposition (EMD) suggests 3 Sv decline mean transport. This consistent with observed tide gauge records Bay...

10.5194/os-11-607-2015 article EN cc-by Ocean science 2015-07-30

An unusual "triple-dip" La Niña, described in Sidebar 3.1, had continuing, wide-spread ramifications for the state of ocean and climate 2022.Triple-dip Niñas are not unprecedented, but until now have always followed an extreme El Niño.Anomalously low sea-surface temperatures (SSTs) eastern tropical Pacific persisted from August 2020 through December 2022, with only a brief intermission May-July 2021.Strengthened easterly trade winds drove anomalously strong westward surface currents brought...

10.1175/bams-d-23-0076.2 article EN Bulletin of the American Meteorological Society 2023-09-01

Sea-level rise (SLR) is not just a future trend; it occurring now in most coastal regions across the globe. It thus impacts only long-range planning environments, but also emergency preparedness. Its inevitability and irreversibility on long time scales, addition to its spatial non-uniformity, uncertain magnitude timing, capacity drive non-stationarity flooding engineering timescales, create unique challenges for risk-management decision processes. This review assesses past United States...

10.1080/08920753.2019.1551012 article EN Coastal Management 2019-01-24

We develop an aggregated extreme sea level (ESL) indicator for the contiguous United States coastline, which is comprised of separate indicators mean (MSL) and storm surge climatology (SSC). use water data from tide gauges to estimate interannual multi-decadal variability MSL SSC identify coastline stretches where observed changes are coherent. Both show significant fluctuations. Indicators individual components combined with multi-year tidal contributions into ESL indicators. The relative...

10.1038/s41597-019-0333-x article EN cc-by Scientific Data 2019-12-18
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