Wednesday, May 2, 2018

NASA SLR Data Tool

NASA now has the following

The NASA Sea Level Change Data Analysis Tool (DAT) has been designed to allow for quick-look comparisons and analysis of NASA datasets of sea level change. The datasets range from sea level observations, to ice observations, to model output to quickly study anomalies and get immediate results on potential relations between different datasets. For computational reasons, all data have been interpolated to a 1x1 degree grid. Full datasets can be download through the database for further analysis.




Caution - this data is probably not meant to be used in coastal waters. 

Tuesday, January 2, 2018

Sea Level Rise for Hampton Roads 2017

Sea Water Levels at Sewells Point, VA


With the end of the year, it is a good time to recap the data we have on flooding events and sea level rise for the Hampton Roads region. 


Hourly Data at Sewells Point





Average Annual Sea Level at Sewells Point





The variability is caused by interannual processes like el Nino, la Nina and other ocean cycles. 


10 Year moving average at Sewells Point



Hours per year of Nuisance Flooding



Return Period of Flooding Events



Rate of Sea Level Rise 



The trend has increased from 4.59 to 4.61mm/year since last year.

The past year - 2017




2017 Compared to other years by month


You will notice that the highest water levels during any year are often in September. This is because the ocean waters are warmest then and they have expanded - making sea level higher. This is a seasonal effect.




Thursday, December 14, 2017

Hampton Roads Tide Predictions

Local Tide Predictions for Hampton Roads

There are many locations throughout Hampton Roads that NOAA provides tide predictions for.

The list of locations that have predictions is at https://tidesandcurrents.noaa.gov/tide_predictions.html?gid=1414

Graphically they are shown at https://tidesandcurrents.noaa.gov/gmap3/index.shtml?type=TidePredictions&region=

Following is an image of the locations provided:


Friday, November 10, 2017

National Climate Assessment 2017





Volume 1 "Climate Science Special Report" of the Fourth National Climate Assessment has been released.

The key findings for the Sea Level Rise Chapter (12) are on page 333.


Draft Integrated City of Norfolk Coastal Storm Risk Management Feasibility Report /Environmental Impact






The "Draft Integrated City of Norfolk Coastal Storm Risk Management Feasibility Report /Environmental Impact" for Norfolk VA has been released Draft Integrated City of Norfolk Coastal Storm Risk Management Feasibility Report /Environmental Impact

The PDF of the report is at http://cdm16021.contentdm.oclc.org/utils/getfile/collection/p16021coll7/id/5483

This is a great resource for information.  





Saturday, September 2, 2017

Tracking Hurricane Irma

With Hurricane Irma coming our way I'm posting some information as we watch the forecasts.



Forecasts suggest that if Irma does come our way it would be Sat/Sun/Monday September 9/10/11

Tides will be high around noon and midnight on those days.

Storm surge predictions for Sewells Point are HERE

5 day forecast animation by the National Hurricane Center

The website Tropical Tidbits provides a very good narrative every few days in a 10-minute video cast. Also under the various tabs there are well-organized model results. Click around it and enjoy. The author is a grad student at FSU so donate a bit if you like it. I'm sure he could use the $.

Our friends at UNC have the ADCIRC Model now running for Irma. It shows the hurricane track, predicted storm surge, and much more. LINK

I'll be adding to this as Irma approaches.

Evacuation - Evacuation orders will be given based on the 'know your zone' scheme. Go to Know Your Zone and find which of the four zones you are in. Helpful tip - go to LINK and enter your address in the upper left 'find address or place'. Good luck.


Sunday, June 18, 2017

New Paper by Billy Sweet and colleagues

https://www.ncdc.noaa.gov/monitoring-content/sotc/national/2017/may/2016_StateofHighTideFlooding.pdf

2016 State of U.S. High Tide Flooding and a 2017 Outlook 

William V. Sweet1 , John J. Marra2 , Gregory Dusek1

National Oceanic and Atmospheric Administration’s Center for Operational Oceanographic Products and Services1 and National Centers for Environmental Information2 Summary 

The number of days with high tide flooding in 2016 was above the local flood‐frequency trend at the majority of the 28 locations examined (more than half of the trends are accelerating in time). Three all‐ time records for annual‐flood days were either tied (Key West, FL) or broken (Charleston, SC; Savannah, GA). If an El Nino develops this coming year (May 2017 ‐ April 2018) as model guidance suggests is possible, the frequency of daily floods may be compounded relative to long‐term trends, upwards of 25% or more at several U.S. West and East Coast locations.