Sentences with phrase «satellite gravity measurements»

The second reconstruction uses satellite gravity measurements to calculate the change in mass of land ice and land water.

2) loss of land based ice: both land based observations (Glacier National Park for instance) and satellite gravity measurements make it clear that land based ice is decreasing.

Cazenave 2009 uses satellite gravity measurements to create two independent estimates of ocean heat - both find warming.

The issues relating to sea level rise and the global water budget can only be addressed when the record of satellite gravity measurement from GRACE achieves adequate duration.

Not exact matches

«Tomography is the most powerful method to get this information, but in the future it will be combined with very sensitive gravity measurements from satellites and maybe electromagnetic sounding, where people do conductivity measurements of the interior,» she said.

Precise measurements of the lunar gravity and rotation enable us to know how our natural satellite is deformed by tidal forces.

Geophysicists will be able to answer these questions in the future using gravity field measurements from ESA's GOCE gravity satellite.

But measurements from the Gravity Recovery and Climate Experiment (GRACE) satellites, which weigh ice by measuring its gravitational tug from space, suggest that West Antarctica as a whole is losing ice — together with the Antarctic Peninsula, about 150 cubic kilometers per year as of 2005.

The glaciologist was combing through satellite and GPS data to see what small, local effects could be clouding satellite measurements of larger changes in Earth's gravity from ice loss.

A more recent study based on satellite measurements of gravity over the entire continent suggests that while the ice sheets in the interior of Antarctica are growing thicker, even more ice is being lost from the peripheries.

Rignot et al have updated results, including those from the GRACE gravity measurement satellite, to the end of 2010 and show that the downward trend in ice mass is continuing (stronger in Greenland than in Antarctica).

Additional precision in this study was provided by NASA's Gravity Recovery and Climate Experiment, or GRACE satellites, which can make detailed measurements of gravity and, as one result, estimate the mass of glaciers they are flyinGravity Recovery and Climate Experiment, or GRACE satellites, which can make detailed measurements of gravity and, as one result, estimate the mass of glaciers they are flyingravity and, as one result, estimate the mass of glaciers they are flying over.

Using satellite measurements from the NASA / German Aerospace Center Gravity Recovery and Climate Experiment (GRACE), the researchers measured ice loss in all of Earth's land ice between 2003 and 2010, with particular emphasis on glaciers and ice caps outside of Greenland and Antarctica.

There were reports that the sheet was not thinning from satellite altimetry, but then the gravity measurements showed that there was mass loss.

Therefore I strongly doubt that the «rising» of the land has any appreciable bearing upon our estimates of ice loss in Antarctica, whether they are based upon gravity measurements via satellites or laser altimetry.

... Quantification of these sources is possible using precise satellite altimetry and gravity measurements as initiated by the IceSat (36) and GRACE satellites (37), which warrant follow - on missions.

Abstract: Using measurements of time - variable gravity from the Gravity Recovery and Climate Experiment satellites, we determined mass variations of the Antarctic ice sheet during 2002 &mdashgravity from the Gravity Recovery and Climate Experiment satellites, we determined mass variations of the Antarctic ice sheet during 2002 &mdashGravity Recovery and Climate Experiment satellites, we determined mass variations of the Antarctic ice sheet during 2002 — 2005.

The researchers compared GOSAT short - wave infrared Fourier transform spectrometer data collected between 2009 and 2013 with water level data from Gravity Recovery and Climate Experiment observations to approximate drought and used satellite measurements of solar - induced chlorophyll fluorescence as a proxy for vegetation levels.

Figure 1 shows gravity satellite measurements of Greenland ice mass from April 2002 to February 2009 (Velicogna 2009).

Collecting data from NASA's satellite Gravity and Recovery Climate Experiment, known as GRACE, and GPS measurements of the bedrock on the edges of the ice sheet, the Denmark Technical Institute's National Space Institute in Copenhagen was able to show that crustal uplift due to ice loss has gone up by 1.5 inches between October 2005 and August 2009 along the northwest coast, a change that study co-author John Wahr calls «very dramatic».

Yet the rate of ice loss from these two polar realms, as identified by satellite measurements of the change in gravity of the ice masses, has more than doubled over the last decade.

Based on GRACE satellite gravity estimates (illustrated in the graph below on the left) and hydrographic measurements (graph on right), Greenland's lost ice has correlated best with the pulses of warm Atlantic water that entered into the Irminger Current that flows to the west around Greenland, delivering relatively warm water to the base of Greenland's marine terminating glaciers.

Both of the Nature Climate Change studies used a combination of direct measurements of temperature at various depths, a measurement of the altitude of the top of the ocean (sea level) from highly accurate satellite instruments, and measures of the mass of the water in the ocean, from the GRAIL gravity research project.

Using satellite measurements from the NASA / German Aerospace Center Gravity Recovery and Climate Experiment (GRACE), the researchers measured ice loss in all of Earth's land ice between 2003 and 2010, with particular emphasis on glaciers and ice caps outside of Greenland and Antarctica.

With that in mind, a team from the University of Edinburgh, UK, and SRON Netherlands Institute for Space Research, has used gravity measurements from satellites and temperature data to find out more.

The Gravity Recovery and Climate Experiment (GRACE) satellite, a joint project between NASA and the German Aerospace Centre, provided measurements of gravity anomalies, which the team related to groundwater Gravity Recovery and Climate Experiment (GRACE) satellite, a joint project between NASA and the German Aerospace Centre, provided measurements of gravity anomalies, which the team related to groundwater gravity anomalies, which the team related to groundwater height.

The maps above combine data from the twin satellites of the Gravity Recovery and Climate Experiment (GRACE) with other satellite and ground - based measurements to model the relative amount of water stored near the surface and underground as of September 17, 2012.

While modern satellite - based techniques such as laser altimetery and gravity anomaly measurements provide important information on very recent changes, to get at the longer term we must rely on less direct methods.

A decision framework is developed for quantifying the economic value of information (VOI) from the Gravity Recovery and Climate Experiment (GRACE) satellite mission for drought monitoring, with a focus on the potential contributions of groundwater storage and soil moisture measurements from the GRACE data assimilation (GRACE - DA) system.