Happy New Year 2024 (and sorry for the forum being offline some hours) /DM
ps: GRACE Follow-On - where are you? No info from NASA or Germany since late 2018. Is it in trouble as data was promised by now.
Quote from: Phil. on March 19, 2019, 02:52:42 PMps: GRACE Follow-On - where are you? No info from NASA or Germany since late 2018. Is it in trouble as data was promised by now.I heard that the accelerometer on one of the satellites is kaputt. That is not good at all and will quite drastically lower the data quality compared with fully functioning GRACE
GRACE Follow-On Science Team & Highlights:On Jan 28, 2019, the mission exited Phase-D (in-orbit-checkout) and entered Phase-E and thebeginning of science operations. During the first 120 days of Phase-E, the project’s Science DataSystem (JPL, CSR, GFZ) team will conduct the validation and verification of the flight systemoperations and data processing approach to obtaining monthly gravity fields at a precisionequivalent to that achieved with GRACE. Preliminary results from Phase-D and early Phase-Eshow that the system performance meets the Level 1 science and technology requirements ofcontinuity with the 15-year record from GRACE.Since launch (May-22, 2018), GRACE-FO has collected approximately 7 months of the sciencedata which will be part of the first Level-1A/B data scheduled for release on or before May 28,2019. The Level-2 gravity products and the observations from the LRI (Laser RangingInterferometer) technology demonstration will be released as planned on or before July-27,2019. The Science Data System will release the data through the US PO.DAAC(http://podaac.jpl.nasa.gov) and the German ISDC (https://isdc.gfz-potsdam.de/grace-fo-isdc)data portals (see important updates for PO.DAAC data access below). Detailed documentationof the Level-1 data processing and the adopted calibration strategies will be releasedconcurrently with the data.
New Bedrock overlay page for all of Greenlands major glaciers.https://cryospherecomputing.tk/Bedrock
Just awesome Tealight!May i suggest using a bigger font and a visual separation (thin line perhaps) between the glaciers and centring of the pics. Would make it even more beautiful imho.
Tealight...you should get an award for this work.
Quote from: Shared Humanity on April 20, 2019, 02:17:55 PMTealight...you should get an award for this work.For this? It's just using some web templates, downloading other peoples work and overlaying two images in a paint program. All in all two afternoons of work.
AbstractWe reconstruct the mass balance of the Greenland Ice Sheet using a comprehensive survey of thickness, surface elevation, velocity, and surface mass balance (SMB) of 260 glaciers from 1972 to 2018. We calculate mass discharge, D, into the ocean directly for 107 glaciers (85% of D) and indirectly for 110 glaciers (15%) using velocity-scaled reference fluxes. The decadal mass balance switched from a mass gain of +47 ± 21 Gt/y in 1972–1980 to a loss of 51 ± 17 Gt/y in 1980–1990. The mass loss increased from 41 ± 17 Gt/y in 1990–2000, to 187 ± 17 Gt/y in 2000–2010, to 286 ± 20 Gt/y in 2010–2018, or sixfold since the 1980s, or 80 ± 6 Gt/y per decade, on average. The acceleration in mass loss switched from positive in 2000–2010 to negative in 2010–2018 due to a series of cold summers, which illustrates the difficulty of extrapolating short records into longer-term trends. Cumulated since 1972, the largest contributions to global sea level rise are from northwest (4.4 ± 0.2 mm), southeast (3.0 ± 0.3 mm), and central west (2.0 ± 0.2 mm) Greenland, with a total 13.7 ± 1.1 mm for the ice sheet. The mass loss is controlled at 66 ± 8% by glacier dynamics (9.1 mm) and 34 ± 8% by SMB (4.6 mm). Even in years of high SMB, enhanced glacier discharge has remained sufficiently high above equilibrium to maintain an annual mass loss every year since 1998.
UK scientists head to Greenland this week to trial new sensors that can be placed under its 2km-thick ice sheet.The instruments are designed to give researchers unique information on the way glaciers slide towards the ocean.Dubbed "Cryoeggs", the devices will report back on the behaviour of the meltwaters that run beneath the ice.This water acts to lubricate the flow of glaciers, and in a warmer world could increase the volume of ice discharged to the ocean.This would push up global sea levels - potentially by as much as 7m, if all the ice on Greenland were to melt.Scientists want to understand how fast the process could unfold."Our models have done a fantastic job so far in building a picture of what might happen, but they've essentially been working blind because we have so little data from the bed of the Greenland ice sheet," said Dr Liz Bagshaw from Cardiff University."We have some measurements from cabled instruments and from the bottom of boreholes, but we don't have enough data to figure out what's going on across the whole of the ice sheet, to determine how much of that 7m might end up in the ocean," she told BBC News.
Great. Now Greenland will contribute slightly more to SLR by putting its sand in the sea to support eroded beaches made worse by SLR.
Mostly, though, sand for concrete, to build the houses, highways and harbors dikes of a growing shrinking world."
Builders like angular sand of the kind found on riverbeds. Sand, sand everywhere, nor any grain to use, to paraphrase Coleridge. A textbook example is the Burj Khalifa in Dubai, the world’s tallest skyscraper. Despite being surrounded by sand, it was constructed with concrete incorporating the “right kind of sand” from Australia.
High buildings have high embodied carbon. Let's build low wooden ones.
so some guy here in a forum that deals with global warming and sea-ice loss is seriously spending time and energy to discuss who to use greenland sand in the tropics, means even more stuff to transport all around the globe without as real need ?
Quote from: magnamentis on July 09, 2019, 04:06:15 AMso some guy here in a forum that deals with global warming and sea-ice loss is seriously spending time and energy to discuss who to use greenland sand in the tropics, means even more stuff to transport all around the globe without as real need ?Sarcasm gets absolutely lost in this forum. Every time someone makes a joke or a light handed comment it turns into a challenge. It was a comment on a recent paper Mag. Nothing more. 🤔
I don't know the name of this glacier. These blocks that calved on the 26th are around 1 km across. It's at 75.572625,-58.237839Many of these glaciers along the west coast of Greenland are calving.(click to animate)
Note the data gap June 2017 to May 2018.Regular monthly data only just started.
Quote from: gerontocrat on July 27, 2019, 10:21:05 PMNote the data gap June 2017 to May 2018.Regular monthly data only just started.Thank you for this information.How did they match the starting point (May 2018) of GRACE2 to the end point (June 2017) of GRACE1? The starting point looks to me as being a little bit too high...
An abandoned US military base buried deep under the Greenland ice has drifted hundreds of metres towards the edge of the ice cap since it was built at the height of the Cold War, a report shows."Camp Century is still 100 km (62 miles) from the edge, so it will take many, many years before it reaches a critical point," Danish scientist Nanna Karlsson told the Greenland newspaper Sermitsiaq.The base, powered by the world's first mobile nuclear reactor, was officially a research station, but its real aim was to launch nuclear missiles against the Soviet Union in the event of war.
“President Trump made his name on the world’s most famous island. Now he wants to buy the world’s biggest,” the Wall Street Journal reports.“The idea of the U.S. purchasing Greenland has captured the former real-estate developer’s imagination, according to people familiar with the deliberations, who said Mr. Trump has, with varying degrees of seriousness, repeatedly expressed interest in buying the ice-covered autonomous Danish territory between the North Atlantic and Arctic oceans.”...
Trump Wants to Buy GreenlandAugust 15, 2019 at 5:33 pm EDT By Taegan Goddard 116 CommentsQuote“President Trump made his name on the world’s most famous island. Now he wants to buy the world’s biggest,” the Wall Street Journal reports.“The idea of the U.S. purchasing Greenland has captured the former real-estate developer’s imagination, according to people familiar with the deliberations, who said Mr. Trump has, with varying degrees of seriousness, repeatedly expressed interest in buying the ice-covered autonomous Danish territory between the North Atlantic and Arctic oceans.”...Sorry to spoil your day, b.c.