Sea level rise accelerates over time

Global sea level rise is accelerating incrementally over time rather than increasing at a steady rate, as previously thought, according to a new study based on 25 years of NASA and European satellite data.

If the rate of ocean rise continues to change at this pace, sea level will rise 26 inches (65 centimeters) by 2100—enough to cause significant problems for coastal cities. Read more Sea level rise accelerates over time

NASA study finds sea level rise accelerating

Published in the journal “The Cryosphere,”

A NASA study based on an innovative technique for crunching torrents of satellite data provides the clearest picture yet of changes in Antarctic ice flow into the ocean.

The findings confirm accelerating ice losses from the West Antarctic Ice Sheet and reveal surprisingly steady rates of flow from its much larger neighbor to the east.

The computer-vision technique crunched data from hundreds of thousands of NASA-U.S. Geological Survey Landsat satellite images to produce a high-precision picture of changes in ice-sheet motion.

The new work provides a baseline for future measurement of Antarctic ice changes and can be used to validate numerical ice sheet models that are necessary to make projections of sea level. It also opens the door to faster processing of massive amounts of data.

Read the rest of the article online at: https://sealevel.nasa.gov/news/110/new-study-sharpens-focus-on-antarctic-ice-loss

Also online is the NASA whiteboard basics about sea level rise:  https://sealevel.nasa.gov/resources/72/nasas-earth-minute-sea-level-rise.

New NASA eyes on ice

American Geophysical Union (AGU) | Published on Dec 13, 2017

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In 2018, NASA will launch the next generation of two satellite missions that will track changes in Earth’s ice with incredible precision, giving scientists more detailed information to measure ice melt, and forecast future changes and impacts such as sea level rise.

In this workshop, scientists will preview the Gravity Recovery and Climate Experiment (GRACE) follow-on and ICESat-2 missions and their diverse science objectives, which also include studying changes to liquid water, the solid Earth and vegetation.

Participants:

  • Thorsten Markus, NASA Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.;
  • Felix Landerer, NASA Jet Propulsion Laboratory, Pasadena, California, U.S.A.;
  • Helen Fricker, Scripps Institution of Oceanography, La Jolla, California, U.S.A.;
  • Don Chambers, University of South Florida, St. Petersburg, Florida, U.S.A.

In New York City, rising seas could cause Sandy-like floods every five years.

Ref: Proc. Natl. Acad. Sci. USA 2017

High-Water Events in Lower ManhattanOnline — Superstorm Sandy was 1,000 miles wide, the largest hurricane ever recorded in the Atlantic, and produced the worst flood in New York City history when it hit five years ago.

Since then, the city has spent billions upgrading infrastructure and preparing for the next big hurricane.

But in the coming decades, the city could see this kind of flooding on a routine basis. According to a new study out recently, sea-level rise could lead to Sandy-like flood events every five years starting around mid-century.

The study, written by some of the world’s most renowned experts on hurricanes and Antarctica’s melting ice sheet, provides fresh evidence that sea-level rise will dominate New York City’s future, overwhelming any effect from the changing frequency or intensity of storms. Read more In New York City, rising seas could cause Sandy-like floods every five years.

Miami Mayor Wants To Spend $192 Million On Sea Rise & Flood Prevention

From Climate Denial Crock of the Week with Peter Sinclair

ThinkProgress:

Two thirds of property buyers in Miami don’t even ask their brokers about “the potential impact of global climate change and sea level rise on the local market,” a new survey finds.

Meanwhile, we appear headed toward the worst-case scenario of sea level rise, and President Donald Trump is doing all he can to pop the trillion-dollar coastal property bubble, abandoning the Paris climate deal and trying to gut both domestic climate action and coastal adaptation programs.

Read more Miami Mayor Wants To Spend $192 Million On Sea Rise & Flood Prevention

Climate broke multiple records in 2016

Extreme and unusual trends continue in 2017

Climate breaks multiple records in 2016Online  —  The year 2016 made history, with a record global temperature, exceptionally low sea ice, and unabated sea level rise and ocean heat, according to the World Meteorological Organization (WMO).

WMO issued its annual statement on the State of the Global Climate ahead of World Meteorological Day on 23 March. Read more Climate broke multiple records in 2016