Sentences with phrase «satellite measurements we have»

Even then, many experts disputed this, and satellite measurements have since shown the two sheets are already losing enough ice to raise sea level by 1.3 millimetres a year and climbing.

But good satellite measurements have only been around since the 1980s, and «before that, there's not much information,» study co-author Kurt Kjær, of the University of Copenhagen, said.

Has realclimate ever done (or considered doing) an entry about the immense contribution that satellite measurements have made in the past two - three decades, in helping us to understand various components of the earth system (e.g., vegetation, ozone, ice sheet mass, water vapor content, temperature, sea level height, storms, aerosols, etc.)?

Various combinations of surface, balloon, and satellite measurements have quantified the distribution and optical properties of aerosols for Chichon and Pinatubo, but even for these eruptions observations are not complete.

In 2016 a new analysis suggested satellite measurements had underestimated recent melting of Greenland ice by some 40 %, Khan et al. (2016).

Although the Arctic Ocean is typically mostly covered by ice, both the thickness and extent of summer sea ice in the Arctic have shown a dramatic decline over the past thirty years, satellite measurements have found.

And through satellite measurements we have actually been able to measure how outgoing has changed since the 1980s and it is as predicted given the increased levels of green.

Because satellite measurements have significant limitations, as the NAS report discussed in detail.

In recent years, incredibly precise satellite measurements have been used to map out the subsidence in detail, highlighting fast - dropping hotspots as well as changes along the length of the California Aqueduct.

As a result, satellite measurements have shown no indication of an urban contamination effect, Spencer said.

Not exact matches

To test the theory that the biblical account may have depicted actual events, the researchers studied maps of the region, archaeological records and satellite measurements to find a topographical feature where such an event might have been possible.

Using this technique, scientists have measurements for 11 Milky Way satellite galaxies, eight of which are orbiting in a tight disk perpendicular to the spiral galaxy's plane.

Meteorologists have also struggled to incorporate measurements of cloudy areas taken by polar - orbiting satellites.

Now a new study led by researcher Eduardo Maeda from the University of Helsinki has put together a unique combination of satellite data and hydrological measurements to study the problem.

While satellite measurements and climate models have detailed this recent ice loss, there are far fewer direct measurements of melt collected from the ice sheet itself.

In fact, during the continent's summer this time last year, there was less melting than at any time in the 30 years that we have had reliable satellite measurements of the region.

Past measurements from satellites have shown either no changes in greening between seasons or increased greening through the end of the dry season, attributed to fewer clouds blocking sunlight from reaching the ground.

«The wet season has typically 85 to over 95 percent cloudiness from late morning to early afternoon, when NASA satellites make measurements,» said co-author and remote sensing specialist Alexei Lyapustin of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

For more than a decade these Earth - observing satellites have provided some of the first environmental measurements on a global scale, including large - scale changes in the mass of polar ice.

But Holland and Webster assumed that measurements taken before aircraft and satellites made storms easier to spot could have missed as many as five hurricanes per year.

Bigelow Laboratory for Ocean Sciences researchers have developed a statistical method to quantify important ocean measurements from satellite data, publishing their findings in the journal Global Biogeochemical Cycles.

But today, space weather scientists are reaping such a windfall, as the Los Alamos National Laboratory in New Mexico has released 16 years of radiation measurements recorded by GPS satellites.

Dirk Notz and Julienne Stroeve have now compared corresponding model calculations with data from satellite measurements, and discovered that the climate models underestimate the loss of Arctic sea ice.

Scott Goetz, a senior scientist at the Woods Hole Research Center who has studied the Amazon, said that fleshing out what are «essentially back - of - the - envelope calculations» of the 2010 drought's impact will require additional field measurements and a closer examination of satellite observations of the Amazon's tree canopy.

By early 2011, they had dropped by 7 mm, the biggest drop since satellite measurements began in 1992.

«With previous measurements, a satellite might have only been able to fly through such an event once, and not get a chance to witness the changes actually happening.

For the first time, the researchers have proved that both the worldwide measurement network NDACC with its ground stations and modern weather satellites provide reliable global data for the isotope composition of tropospheric water vapor.

A research team has refined a highly original method for studying ground water based on altitude measurements taken by satellite.

They send their measurements in automatically via satellite uplink, and all have pretty much the same type of measurement system.

The study, aimed at quantifying the small - scale circulation that can not be captured by satellite - based altimeter measurements or general circulation models, has immediate practical applications to help better predict the path of catastrophic pollutant events, such as from future oil spills or nuclear disaster events.

The researchers precisely matched measurements taken at the same spot and calculated whether the height had risen or fallen from one satellite pass to the next; a change indicated a shift in the location of the bulge.

While satellites have provided consistently good data for years, the next frontier in sea level rise measurement is a new type of radar that can capture a more crisp, higher - resolution picture of sea surface heights.

But geodetic precession had already been confirmed to nearly this level of accuracy in measurements of laser light bouncing off mirrors on the Moon, and the frame - dragging result is no more accurate than an estimate extracted from measurements of the precession of the orbits of the Laser Geodynamics Satellites (LAGEOS) launched in 1976 and 1992.

Reanalyzing the satellite temperature measurements, Quiang Fu of the University of Washington and his colleagues concluded that a cooling in the upper atmosphere had been masking what is in fact a large warming of the lower atmosphere.

Tides on Earth have a far - reaching influence, including disturbing satellites» measurements by affecting their motion.

The loss of satellite - based «ocean color» measurements would be a blow to climate science, because phytoplankton — tiny ocean plants — help regulate the global carbon cycle.

«We used actual satellite measurements of both albedo and sea ice in the region to verify this and to quantify how much extra heat the region has absorbed due to the ice loss.

Unlike traditional shipboard sonar measurements — which bounce waves off the seafloor and have mapped out a mere 20 percent of the planet's oceans — the satellites captured subtle variations in Earth's gravitational pull at the water's surface.

«Land - based measurements have been the cheap answer,» says Georgia Tech geophysicist Andrew Newman, «but a buoy with a GPS and satellite communications could take the place of a ship and help us get more frequent seafloor measurements more affordably.»

Since then, measurements from other satellites have shown that the ice sheets on both Antarctica and Greenland are shrinking.

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).

The solar wind measurements were hourly averages from an experiment on Interplanetary Monitoring Platform 8, a satellite that has periodically sampled the solar wind since its launch in 1973.

New measurements from a NASA satellite have allowed researchers to identify and quantify, for the first time, how climate - driven increases of liquid water storage on land have affected the rate of sea level rise.

Rosenfeld and his students have developed an aerosol quantification method that uses satellite - based measurements of the infrared light reflected by clouds.

«With measurements like these, the Suzaku satellite is having a profound impact on our understanding of how the largest structures in our universe grow,» Allen said.

The sea ice surrounding Antarctica has increased in extent and concentration from the late 1970s, when satellite - based measurements began, until 2015.

This conclusion is, in retrospect, not too surprising; we've learned from satellite measurements that solar activity changes the brightness of the sun very little.

In addition to the surface data described above, measurements of temperature above the surface have been made with weather balloons, with reasonable coverage over land since 1958, and from satellite data since 1979.

Again, Monckton must surely know full well that for the last 25 - 30 years satellite temperature measurement of sea and land surface have replaced terrestrial temperature station measurements in many cases since these give a much greater coverage (70 % of the surface of the Earth is water... it's difficult to put weather stations on top of ice sheets etc.!)

While there remain disparities among different tropospheric temperature trends estimated from satellite Microwave Sounding Unit (MSU and advanced MSU) measurements since 1979, and all likely still contain residual errors, estimates have been substantially improved (and data set differences reduced) through adjustments for issues of changing satellites, orbit decay and drift in local crossing time (i.e., diurnal cycle effects).