So, whatever happened to the Greenland glaciers?

[Old Rocks]

The primary tool for measuring sea level from satellites is not GRACE, but the T/P satellite.

University of Colorado Global mean sea level

Long-term mean sea level change is a variable of considerable interest in the studies of global climate change. The measurement of long-term changes in global mean sea level can provide an important corroboration of predictions by climate models of global warming. Long term sea level variations are primarily determined with two different methods. Over the last century, global sea level change has typically been estimated from tide gauge measurements by long-term averaging. Alternatively, satellite altimeter measurements can be combined with precisely known spacecraft orbits to provide an improved measurement of global sea level change.
Since August 1992 the satellite altimeters have been measuring sea level on a global basis with unprecedented accuracy. The TOPEX/POSEIDON (T/P) satellite mission provided observations of sea level change from 1992 until 2005. Jason-1, launched in late 2001 as the successor to T/P, continues this record by providing an estimate of global mean sea level every 10 days with an uncertainty of 3-4 mm. The latest mean sea level time series and maps of regional sea level change can be found on this site. Concurrent tide gauge calibrations are used to estimate altimeter drift. Sea level measurements for specific locations can be obtained from our Interactive Wizard. Details on how these results are computed can be found in the documentation and the bibliography. Please contact us for further information.

 

[Old Rocks]

Comparison of Satellite Altimetry to Tide Gauge Measurement of Sea Level: Predic

Title:
Comparison of Satellite Altimetry to Tide Gauge Measurement of Sea Level: Predictions of Glacio-Isostatic Adjustment.
Authors:
Clark, James A.; Haidle, Paul E.; Cunningham, L. Nichole
Publication:
Journal of Climate, vol. 15, Issue 22, pp.3291-3300
Publication Date:
11/2002
Origin:
WEB
DOI:
10.1175/1520-0442(2002)015<3291:COSATT>2.0.CO;2
Bibliographic Code:
2002JCli...15.3291C

Abstract
Modern rates of sea level change are of interest because of concerns that global warming may be causing glacier retreat. Both tide gauges and satellite radar altimetry are used to measure the present rates of change in sea level. Tide gauges measure sea level relative to the ocean floor whereas the reference for satellite altimetry is the earth's center. A numerical model of deformation of the earth's solid surface and its geoid forced by melting ice sheets, both past and present, is used to predict the present rate of sea level change as measured by tide gauges and satellites. Sea level change observed by both tide gauges and satellites are predicted to be spatially nonuniform. Considering only past ice sheets tide gauges in glaciated regions would record a fall in sea level of 13 mm yr1, whereas satellite altimetry would record a rise in sea level of 0.7 mm yr1. In the region peripheral to the glaciated zone a tide gauge would record a rise in sea level (3 mm yr1) in contrast to a predicted fall in sea level (0.3 mm yr1) recorded with satellite altimetry. Near regions once glaciated, the rate of sea level change as recorded by satellite decays more rapidly than the tide gauge sea level signature and so isostatic adjustment caused by past ice sheets contributes proportionately less to the modern rate of sea level change as measured by satellites than by tide gauges. At regions distant from glaciated areas both tide gauges and satellites would record a slight (0.3 mm yr1) sea level fall. The immediate elastic sea level response from melting of present ice sheets yields a similar signature for data from both tide gauges and satellite altimetry. Recorded sea level would fall near the meltwater source and at great distance from the source would rise approximately 122% of the oceanwide average sea level amount. Therefore glacio-isostatic processes will contaminate the sea level record measured by satellite less than the tide gauge record

 

[Old Rocks]

And here is where we are at right now.

Laboratory for Satellite Altimetry / Sea level rise

Laboratory for Satellite Altimetry / Sea level rise
Sea level rise
One of the most significant potential impacts of climate change is sea level rise that may cause inundation of coastal areas and islands, shoreline erosion, and destruction of important ecosystems such as wetlands and mangroves. As global temperatures increase, sea level rises due to a thermal expansion of upper layers of the ocean and melting of glaciers and ice sheets.

The measurement of long-term changes in global mean sea level can provide an important corroboration of predictions by climate models of global warming. Satellite altimeter radar measurements can be combined with precisely known spacecraft orbits to measuring sea level on a global basis with unprecedented accuracy. A series of satellite missions that started with TOPEX/Poseidon (T/P) in 1992 and continued with Jason-1 (2001) and Jason-2 (2008) estimate global mean sea level every 10 days with an uncertainty of 3&#8211;4 mm. This climate record has continued with Jason-2 beginning in mid-2008.

Jason-2, launched 20 June 2008, is a joint effort between NOAA, the National Aeronautics and Space Administration, France's Centre National d'Etudes Spatiales (CNES) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).

 

[westwall]

And here is where we are at right now.

Laboratory for Satellite Altimetry / Sea level rise

Laboratory for Satellite Altimetry / Sea level rise
Sea level rise
One of the most significant potential impacts of climate change is sea level rise that may cause inundation of coastal areas and islands, shoreline erosion, and destruction of important ecosystems such as wetlands and mangroves. As global temperatures increase, sea level rises due to a thermal expansion of upper layers of the ocean and melting of glaciers and ice sheets.

The measurement of long-term changes in global mean sea level can provide an important corroboration of predictions by climate models of global warming. Satellite altimeter radar measurements can be combined with precisely known spacecraft orbits to measuring sea level on a global basis with unprecedented accuracy. A series of satellite missions that started with TOPEX/Poseidon (T/P) in 1992 and continued with Jason-1 (2001) and Jason-2 (2008) estimate global mean sea level every 10 days with an uncertainty of 3–4 mm. This climate record has continued with Jason-2 beginning in mid-2008.

Jason-2, launched 20 June 2008, is a joint effort between NOAA, the National Aeronautics and Space Administration, France's Centre National d'Etudes Spatiales (CNES) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).

I see yet more attempts to baffle them with BS there old fraud. Care to address the Vikings again? I notice you studiously ignoring their 500 year history in a colony that was supposedly marginal. How is that again? How does a marginal colony exist longer than the parent governmental system again? How does a marginal colony exist for 25 generations? How does marginal colony outlast 90% of all the governemntal systems in existance when it was founded? How is that again?

 

[Old Rocks]

How many other places died because of the cooling of the MWP? The colony was marginal at the best of times. When the trade with Europe ceased, they no longer had boats, iron, nor any other of the common tools of the European civilization. Even in the best years, they had to feed their stock more months of the year than they could graze. Read Jared Diamond's 'Collapse' for a complete picture of just how marginal that colony really was.

 

[konradv]

And here is where we are at right now.

Laboratory for Satellite Altimetry / Sea level rise

Laboratory for Satellite Altimetry / Sea level rise
Sea level rise
One of the most significant potential impacts of climate change is sea level rise that may cause inundation of coastal areas and islands, shoreline erosion, and destruction of important ecosystems such as wetlands and mangroves. As global temperatures increase, sea level rises due to a thermal expansion of upper layers of the ocean and melting of glaciers and ice sheets.

The measurement of long-term changes in global mean sea level can provide an important corroboration of predictions by climate models of global warming. Satellite altimeter radar measurements can be combined with precisely known spacecraft orbits to measuring sea level on a global basis with unprecedented accuracy. A series of satellite missions that started with TOPEX/Poseidon (T/P) in 1992 and continued with Jason-1 (2001) and Jason-2 (2008) estimate global mean sea level every 10 days with an uncertainty of 3–4 mm. This climate record has continued with Jason-2 beginning in mid-2008.

Jason-2, launched 20 June 2008, is a joint effort between NOAA, the National Aeronautics and Space Administration, France's Centre National d'Etudes Spatiales (CNES) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).

I see yet more attempts to baffle them with BS there old fraud. Care to address the Vikings again? I notice you studiously ignoring their 500 year history in a colony that was supposedly marginal. How is that again? How does a marginal colony exist longer than the parent governmental system again? How does a marginal colony exist for 25 generations? How does marginal colony outlast 90% of all the governemntal systems in existance when it was founded? How is that again?

You're trying to make a case for what happened on the coast. When I imagine Greenland as arable, that's not the picture I see. Your evidence attests to Norse toughness, but little else. BTW, what parental government are you talking about? Both Iceland and the Norse homelands have long traditions of continuous government!!!

 

[westwall]

And here is where we are at right now.

Laboratory for Satellite Altimetry / Sea level rise

Laboratory for Satellite Altimetry / Sea level rise
Sea level rise
One of the most significant potential impacts of climate change is sea level rise that may cause inundation of coastal areas and islands, shoreline erosion, and destruction of important ecosystems such as wetlands and mangroves. As global temperatures increase, sea level rises due to a thermal expansion of upper layers of the ocean and melting of glaciers and ice sheets.

The measurement of long-term changes in global mean sea level can provide an important corroboration of predictions by climate models of global warming. Satellite altimeter radar measurements can be combined with precisely known spacecraft orbits to measuring sea level on a global basis with unprecedented accuracy. A series of satellite missions that started with TOPEX/Poseidon (T/P) in 1992 and continued with Jason-1 (2001) and Jason-2 (2008) estimate global mean sea level every 10 days with an uncertainty of 3&#8211;4 mm. This climate record has continued with Jason-2 beginning in mid-2008.

Jason-2, launched 20 June 2008, is a joint effort between NOAA, the National Aeronautics and Space Administration, France's Centre National d'Etudes Spatiales (CNES) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).

I see yet more attempts to baffle them with BS there old fraud. Care to address the Vikings again? I notice you studiously ignoring their 500 year history in a colony that was supposedly marginal. How is that again? How does a marginal colony exist longer than the parent governmental system again? How does a marginal colony exist for 25 generations? How does marginal colony outlast 90% of all the governemntal systems in existance when it was founded? How is that again?

You're trying to make a case for what happened on the coast. When I imagine Greenland as arable, that's not the picture I see. Your evidence attests to Norse toughness, but little else. BTW, what parental government are you talking about? Both Iceland and the Norse homelands have long traditions of continuous government!!!

Uhhh I supose I am referring to the change from a monarchy to a parliamentary system and the attedant upheavals. And I suggest you look at a current map of Norway and Iceland to look at comparative levels of arable land. In the middle ages people lived where they could and Greenland was pretty good living for 500 years.