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Title: Allowances for evolving coastal flood risk under uncertain local sea-level rise

Journal Article · · Climatic Change
 [1];  [2];  [1];  [3]
  1. Princeton Univ., Princeton, NJ (United States)
  2. Rutgers Univ., New Brunswick, NJ (United States)
  3. National Center for Atmospheric Research (NCAR), Boulder, CO (United States)

Estimates of future flood hazards made under the assumption of stationary mean sea level are biased low due to sea-level rise (SLR). However, adjustments to flood return levels made assuming fixed increases of sea level are also inadequate when applied to sea level that is rising over time at an uncertain rate. SLR allowances—the height adjustment from historic flood levels that maintain under uncertainty the annual expected probability of flooding—are typically estimated independently of individual decision-makers’ preferences, such as time horizon, risk tolerance, and confidence in SLR projections.We provide a framework of SLR allowances that employs complete probability distributions of local SLR and a range of user-defined flood risk management preferences. Given non-stationary and uncertain sea-level rise, these metrics provide estimates of flood protection heights and offsets for different planning horizons in coastal areas. In conclusion, we illustrate the calculation of various allowance types for a set of long-duration tide gauges along U.S. coastlines.

Research Organization:
University Corporation for Atmospheric Research, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
FC02-97ER62402
OSTI ID:
1438454
Journal Information:
Climatic Change, Vol. 137, Issue 3-4; ISSN 0165-0009
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Deep Uncertainty Surrounding Coastal Flood Risk Projections: A Case Study for New Orleans: PROBABILISTIC PROJECTIONS OF FLOOD RISK journal October 2017
Dealing with hurricane surge flooding in a changing environment: part I. Risk assessment considering storm climatology change, sea level rise, and coastal development journal February 2017
CoastAdapt: an adaptation decision support framework for Australia’s coastal managers journal April 2018
Uncertainty representations of mean sea-level change: a telephone game? journal January 2019
Probabilistic Sea Level Projections at the Coast by 2100 journal August 2019
Increased Extreme Coastal Water Levels Due to the Combined Action of Storm Surges and Wind Waves journal April 2019
Mediterranean UNESCO World Heritage at risk from coastal flooding and erosion due to sea-level rise journal October 2018
New elevation data triple estimates of global vulnerability to sea-level rise and coastal flooding journal October 2019
Antarctic Ice Sheet and emission scenario controls on 21st-century extreme sea-level changes journal January 2020
Compounding effects of sea level rise and fluvial flooding journal August 2017
Marine ice sheet instability amplifies and skews uncertainty in projections of future sea-level rise journal July 2019
Probabilistic reanalysis of storm surge extremes in Europe journal January 2020
Extreme sea level implications of 1.5 °C, 2.0 °C, and 2.5 °C temperature stabilization targets in the 21st and 22nd centuries journal March 2018
Neglecting model structural uncertainty underestimates upper tails of flood hazard journal July 2018
Developing signals to trigger adaptation to sea-level rise journal September 2018
Characterizing uncertain sea-level rise projections to support investment decisions journal February 2018
Sea Level Change and Coastal Climate Services: The Way Forward journal October 2017
Developing signals to trigger adaptation to sea-level rise journal April 2021
Probabilistic reanalysis of storm surge extremes in Europe posted_content May 2020
Evolving Understanding of Antarctic Ice‐Sheet Physics and Ambiguity in Probabilistic Sea‐Level Projections text January 2017
Developing signals to trigger adaptation to sea-level rise journal April 2018
New elevation data triple estimates of global vulnerability to sea-level rise and coastal flooding. other January 2019
Extreme sea level implications of 1.5 °c, 2.0 °c, and 2.5 °c temperature stabilization targets in the 21st and 22nd centuries null January 2018
Impacts of representing sea-level rise uncertainty on future flood risks: An example from San Francisco Bay journal March 2017