Increasing ocean winds and wave heights globally have 33 years of proof

Global trends in extreme (90th percentile) wind speed over the period 1985-2018. Areas in red indicate increasing values, whereas blue indicates decreases. Credit: Professor Ian Young – via Phys.org

Extreme ocean winds and wave heights are increasing around the globe, with the largest rise occurring in the Southern Ocean, University of Melbourne research shows.

Researchers Ian Young and Agustinus Ribal, from the University’s Department of Infrastructure Engineering, analysed wind speed and wave height measurements taken from 31 different satellites between 1985-2018, consisting of approximately 4 billion observations.

The measurements were compared with more than 80 ocean buoys deployed worldwide, making it the largest and most detailed dataset of its type ever compiled.

The researchers found that extreme winds in the Southern Ocean have increased by 1.5 metres per second, or 8 per cent, over the past 30 years. Extreme waves have increased by 30 centimetres, or 5 per cent, over the same period.

As the world’s oceans become stormier, Professor Young warns this has flow on effects for rising sea levels and infrastructure.

“Although increases of 5 and 8 per cent might not seem like much, if sustained into the future such changes to our climate will have major impacts,” Professor Young said.

“Flooding events are caused by storm surge and associated breaking waves. The increased sea level makes these events more serious and more frequent.

“Increases in wave height, and changes in other properties such as wave direction, will further increase the probability of coastal flooding.”

Professor Young said understanding changes in the Southern Ocean are important, as this is the origin for the swell that dominates the wave climate of the South Pacific, South Atlantic and Indian Oceans.

“Swells from the Southern Ocean determine the stability of beaches for much of the Southern Hemisphere, Professor Young said.

“These changes have impacts that are felt all over the world. Storm waves can increase coastal erosion, putting costal settlements and infrastructure at risk.”

International teams, including the University of Melbourne, are now working to develop the next generation of global climate models to project changes in winds and waves over the next 100 years.

“We need a better understanding of how much of this change is due to long-term climate change, and how much is due to multi-decadal fluctuations, or cycles,” Professor Young said.

See Also

Learn more: 33-year study shows increasing ocean winds and wave heights

 

The Latest on: Ocean winds and wave heights

[google_news title=”” keyword=”ocean winds and wave heights” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]

via Google News

 

The Latest on: Ocean winds and wave heights
  • New method helps determine the suitability of offshore wind turbine sites
    on June 6, 2024 at 11:25 am

    The EOLO group of the University of the Basque Country (UPV/EHU) presents a new method for analyzing the long-term mechanical fatigue of floating offshore wind turbines.

  • Heat wave or heat dome? Yes, there’s a difference
    on June 5, 2024 at 3:00 am

    The term 'heat dome' has gained prominence recently as climate change, El Niño and other variables have warmed global temperatures and shifted weather patterns.

  • NJ beach weather and waves: Jersey Shore Report for Wed 6/5
    on June 5, 2024 at 2:02 am

    Dan Zarrow is Chief Meteorologist for Townsquare Media New Jersey. The Shore Report is generated semi-automatically daily at 5 a.m. from mid-May to late September. Follow Dan's weather blog, Facebook ...

  • NJ beach weather and waves: Jersey Shore Report for Sun 6/2
    on June 2, 2024 at 2:48 am

    Dan Zarrow is Chief Meteorologist for Townsquare Media New Jersey. The Shore Report is generated semi-automatically daily at 5 a.m. from mid-May to late September. Follow Dan's weather blog, Facebook ...

  • Weekend beach and surf forecast: June 1 and 2
    on May 31, 2024 at 8:20 pm

    This past week has been a slow one for surf across the region due to a lack in storm activity offshore. However, this weekend our coastline will become a little more active as a short period wind ...

  • Rogue Waves Are Getting More Frequent. Here’s Why
    on May 30, 2024 at 5:16 am

    It’s an oft-quoted fact that we know less about the bottom of the ocean than we do about space. And that’s true (from a certain viewpoint). But the top of the ocean can be equally mysterious, ...

  • What Is Wind Shear, and How Does It Shape Hurricanes?
    on May 23, 2024 at 6:00 am

    Too much vertical wind shear, however, can offset the top of the storm. This weakens the wind circulation, as well as the transport of heat and moisture needed to fuel the storm. The result can tear a ...

  • The wind industry is floating an idea: Building turbines on the ocean
    on May 14, 2024 at 5:00 pm

    which looks something like a swimming pool with wave and wind generators that can mimic ocean conditions up to a 500-year storm, takes that work to the next level. On a recent day, the semi ...

  • Waves in Oceanic and Coastal Waters
    on March 8, 2023 at 7:15 pm

    Ocean Dynamics, Vol. 59, Issue ... Joint Calibration of Multiplatform Altimeter Measurements of Wind Speed and Wave Height over the Past 20 Years. Journal of Atmospheric and Oceanic Technology, Vol.

  • Scripps Ocean-Atmosphere Research Simulator
    on December 2, 2021 at 11:40 am

    Scripps Ocean Atmosphere Research Simulator is a unique installation that allows scientists to simulate varying ocean environments by controlling winds, waves, water chemistry, temperature, light and ...

via  Bing News

 

What's Your Reaction?
Don't Like it!
0
I Like it!
0
Scroll To Top