Sentences with word «altimetry»

Variations in global mean sea level (difference to the mean 1993 to mid-2001) computed from satellite altimetry from January 1993 to October 2005, averaged over 65 ° S to 65 ° N. Dots are 10 - day estimates (from the TOPEX / Poseidon satellite in red and from the Jason satellite in green).

Description: based on 4.5 years of GRACE data, and 15 years of altimetry and in - situ data (hydrologic and drifters data).

To get the biggest picture now available, Paolo and his colleagues stitched together satellite radar altimetry data from three consecutive and overlapping missions: the European Space Agency's (ESA's) ERS - 1 and ERS - 2 (which flew from 1991 to 2000 and 1995 to 2011, respectively), and ESA's ENVISAT mission, which collected data from 2002 to 2012.

Fricker uses a laser altimetry satellite, called IceSat, to monitor these lakes as they fill and drain by measuring the rise and fall of the ice above them.

Satellite altimetry data show a strong increase in sea level in various parts of the Southern Ocean over the 1990s.

The data come from laser altimetry measurements that were taken by the now defunct ICESat and, more recently, by aircraft.

Rahmstorf, Foster, and Cazenave (2012) compares the historical sea level tide gauge data from Church and White (2011) and recent satellite altimetry sea level data (orange and red in Figure 4, respectively) to the 2001 and 2007 IPCC report model projections (blue and green in Figure 4, respectively).

Satellite altimetry methods developed at NOC play a crucial role in helping improve storm surge models and map out regional changes in mean sea level.»

EUMETSAT is a partner in the Jason ocean altimetry missions and operates the Copernicus Sentinel - 3 mission related to ocean and atmosphere on behalf of the EC.

From your link: «Using satellite altimetry observations and a large suite of climate models, we conclude that observed estimates of 0 — 700 dbar global ocean warming since 1970 are likely biased low.»

For off - glacier terrain (black triangles and curves) all medians are shown; for glaciers only autumn laser altimetry periods

«The total measurement accuracy for the TOPEX / Poseidon altimetry based Sea surface height is about 80 mm (95 % error) for a single measurement based on one - second along - track averages (Chelton et al., 2001)»

This is important because the IPCC claim, «For the period 1993 to 2003, the rate of sea level rise is estimated from observations with satellite altimetry as 3.1 ± 0.7 mm yr - 1.»

Indeed, satellite gravity data and radar altimetry reveal that the Totten Glacier of East Antarctica, which fronts a large ice mass grounded below sea level, is now losing mass [90].

ICESat / GLAS Altimetry Release - 34 binary format data for Laser 2E and 2F campaigns are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)... Read more»

ICESat / GLAS Altimetry Release - 34 HDF5 data are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) for products GLA05, GLA06, and GLA12 - 15.

«Global mean sea level rise estimated from satellite altimetry provides a strong constraint on climate variability and change and is expected to accelerate as the rates of both ocean warming and cryospheric mass loss increase over time.

Satellite radar altimetry mapping and change detection, developed in the early to mid-1990s allowed the research community to finally extract reliable quantitative information regarding the overall growth or reduction of the volume of the ice sheets.

Blue curve estimated from the difference between altimetry and GRACE - based ocean mass.

His work, published today in the journal Nature Communications, involved gauging the thickness and height of the ice via radar and laser altimetry instruments utilized in NASA's Operation IceBridge and earlier NASA airborne campaigns.

We all must remember the lesson from radar altimetry studies such as Wingham et al. 2006.

Comparison of daily means for Suva with those for Lautoka and satellite altimetry suggest there could be land subsidence at the Suva station equating to a slow positive sea level trend.»

Over the ocean this includes: sea surface slope and surface current, significant wave height, wind speed and sea level from radar altimetry at about 10 km resolution: sea surface temperature under cloud free conditions from the infrared radiometer at about 300 m resolution; chlorophyll a and phytoplankton from the imaging spectrometer under cloud free conditions at about 300 m resolution.

The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth underwater.

Since 1992, Topex / Poseidon has been providing highly precise altimetry measurements which has made it possible to map the energy dissipated by tides.

The global coverage of satellite altimetry since the early 1990s (TOPography EXperiment (TOPEX) / Poseidon and Jason) has improved the estimate of global sea level rise and has revealed the complex geographical patterns of sea level change in open oceans.

Using a satellite called Jason - 3 (part of the Joint Altimetry Satellite Oceanography Network), scientists track changes in sea levels across the planet.

Coastal altimetry, which provides detailed wave and sea level data in the coastal zone captured by specialist instruments called radar altimeters on board satellites, is at the heart of the project and scientists from NOC have been at the cutting - edge of this technique.

The rates and geographic extent of ice loss are «very surprising,» says radar altimetry expert Curt Davis of the University of Missouri, Kansas City.

The 25 - year record is just long enough to provide an initial detection of acceleration — the results will become more robust as the Jason - 3 and subsequent altimetry satellites lengthen the time series.

Thanks to a new Drone Scanning System, every track has been remodelled and faithfully recreated with accurate altimetry.

Overall, I estimate the mass balance of the Greenland ice sheet to be about -80 + / -10 cubic km of ice per year in 2000 and -110 + / -15 cubic km of ice per year in 2004, i.e. more negative than based on partial altimetry surveys of the outlet glaciers.

Worst, J., 2011: Long - term monitoring of the NW Atlantic through altimetry and an acoustic Doppler current profiler.

Beginning in the 1990s, satellites have provided near - global altimetry coverage of the ocean.