NOAA Tidal Datums

Michael Michalski at NOAA/NOS provided links to several technical reports related to datums.

Technical report on the computation of the Modified Procedure for Tidal Datum Computation which looks at the shorter 5 year period for areas of rapid relative sea-level change. 
http://tidesandcurrents.noaa.gov/publications/NOAA_Technical_Report_NOS_COOPS_68.pdf

Some additional references for tidal datum computation and datum error are the following.

Error analysis procedures used by the national ocean service to compute estimated error bounds for tidal datums in the Arctic Ocean.
http://tidesandcurrents.noaa.gov/publications/NOAA_Technical_Report_NOS_COOPS_070.pdf

Estimating accuracies of tidal datums for short term observations
http://tidesandcurrents.noaa.gov/publications/NOAA_Technical_Report_NOS_COOPS_077.pdf

Tidal datums and their applications
http://tidesandcurrents.noaa.gov/publications/tidal_datums_and_their_applications.pdf

Computational techniques for tidal datums handbook
http://tidesandcurrents.noaa.gov/publications/Computational_Techniques_for_Tidal_Datums_handbook.pdf

Tidal analysis and predictions
http://tidesandcurrents.noaa.gov/publications/Tidal_Analysis_and_Predictions.pdf

The Ed Show

The Ed Show on MSNBC had a series on 'Rising Tide - the climate crisis'

In my opinion this is one of the best series I've seen.

Five 5 minute episodes

Not that easy finding stuff on the site but here are the titles and links. There was a fifth I think but cannot find it.

"Rising sea levels threaten major cities" LINK

"Rising tide a national security threat"  -  LINK - features many of us in the region.

"Hoboken pushes forward" LINK

"GOP Lawmakers ignore climate science" LINK

More evidence of Gulf Stream Slowdown

Two papers just published by Rahmsdorf et al in Nature and Ezer in Global and Planetary Change  give more information on the Gulf Stream slowdown and of course that relates to coastal sea level.

The paper reference is Rahmstorf, S., Box, J., Feulner, G., Mann, M., Robinson, A., Rutherford, S., Schaffernicht, E. (2015): Exceptional twentieth-Century slowdown in Atlantic Ocean overturning circulation. Nature Climate Change (online) LINK


Tal Ezer. 2015. Detecting changes in the transport of the Gulf Stream and the Atlantic
overturning circulation from coastal sea level data: The extreme decline
in 2009–2010 and estimated variations for 1935–2012 LINK TO PDF

www.realclimate.org has nice review of the Rahmsdorf paper and link to graphics etc. LINK

The Sandy Report

The North Atlantic Coast Comprehensive Study Report is now ready. Link to very useful website and nice graphics at http://www.nad.usace.army.mil/compstudy

Nuisance Flooding 1927-2014

With the beginning of a new year I downloaded all the one hour data from Sewells Point and plotted the number of hours measured water level was above the nuisance flooding level for that station.

Nuisance flooding is considered 0.53 m above MHHW.

If you want the data for this plot do you can replot it or data from Sewells Point contact me.

Here is the plot:

Land Motion Measurements

As we all know the land in the mid-Atlantic is sinking or subsiding.

This post links to a NOAA system call CORS - Continuously Operating Reference System - that measures very accurately earth motion.

The link to the main page is http://geodesy.noaa.gov/CORS/

The long-term data plots I looked at were all rather short and many have ended.

Nevertheless there may be good subsidence information here.

Long Awaited Report on Sea Level Rise risk to Norfolk Navy Base released

The report titled "Risk Quantification for Sustaining
 Coastal Military Installation Asset and Mission
Capabilities (RC-1701)" by Kelly A. Burks-Copes and many colleagues. We here at ODU have hosted Kelly several times and heard her presentation on this work. Now it is published. Here is the LINK to the report.
This modeling done to produce the products in this report are a good example of how to do a risk analysis of this challenge. Good reading.