Sentences with phrase «ice volume measurements»

Not all ice volume measurements are showing the same trends.

Sea ice volume measurements, which take ice thickness into account, also hit a record low this year.

Sea ice volume measurements, which take ice thickness into account, also hit a record low this year.

Not exact matches

The past climates that forced these changes in ice volume and sea level were reconstructed mainly from temperature - sensitive measurements in ocean cores from around the globe, and from ice cores.

Measurements of ice sheet elevation changes indicate the volume of ice lost, and hence the contribution to sea levels, he tells Carbon Brief.

The sampling issues arise from the fact that sea ice is highly dynamic with lots of spatial and seasonal variability so that measurements from individual moorings, submarine sonar tracks, and aircraft flights can only construct an incomplete picture of the evolution of the total Arctic sea ice volume.

It looks like the variable is constructed by starting with prior period values and adjusing them (this could be for only one element of the ice volume estimation), rather than taking independent measurements each time.

Even if the subs up there took constant ice thickness measurements, it would still be an incomplete picture, a series of snap shot pictues of local conditions, which wouldn't sum to big picture measurement of total ice volume.

Then in 2003 the launch of two new satellites, ICESat and GRACE, led to vast improvements in one of the methods for mass balance determination, volume change, and introduced the ability to conduct gravimetric measurements of ice sheet mass over time.

Measuring the distance apart and speed of 2 satellites in space orbiting the earth to the width of a human hair with no margin for error [damn those drift recalculations], and taking into account unknown factors with respect to the true values for water depth, water weight at different salt concentrations, ice depth magma flows, volcanic activity etc [ie making a lot of guesses], plus taking human motivation on board [like CO2 increase must melt ice surely] can give you an accurate measurement of the volume ice in Antarctica.

Measurements from Antarctic ice cores show that for about 10,000 years before the Industrial Revolution the concentration of carbon dioxide in the atmosphere was about 280 parts per million (ppm) by volume.

They use a range of techniques to track changes in the volume of the ice - sheet over a 500 - year period, and compare it with measurements of ice - accumulation obtained by deep boring undertaken by Lonnie Thompson of Ohio State University.

Stroeve said that sea ice volume, which incorporates measurements of ice extent as well as thickness, is a more important metric than sea ice extent alone.

Satellite measurements from NASA show that in 2008, Arctic sea ice was thinner than 2007, and likely reached a record low volume.

However, the the study also found that measurements at the ice's edge show that climate models alone can overestimate the volume of meltwater flowing to the ocean because they fail to account for water storage beneath the ice.