Sentences with phrase «airborne measurements of»

NASA's long - running Operation IceBridge campaign last week began a series of airborne measurements of melt ponds on the surface of the Arctic sea ice cap.

Note that ppm and delta13C are not the same at all altitudes and evolve progressively, as illustrated by the airborne measurements of Nakazawa et al., Time and space variations of the carbon isotopic ratio, Tellus, 1993.

In October 2011, researchers flying in NASA's Operation IceBridge campaign made the first - ever detailed, airborne measurements of a major iceberg calving event while it was in progress.

Researchers at the University of Alaska Fairbanks have been taking airborne measurements of glacier surface height using a laser altimeter, an instrument that bounces a laser off of the ice surface and measures how long it takes to return.

«Using improved airborne measurements of particle scattering and absorbing properties and chemical composition, we can better measure their size distribution as well.»

Not exact matches

Climatologists looking for signs of global warming have been vexed by a contradiction between ground - based and airborne temperature measurements.

«The combination of bottom - up soil emission measurements and top - down airborne measurements provide strong evidence for their emission assessments,» he says.

A combination of airborne measurements and space weather data from satellites may allow the radiation «clouds» to be tracked.

The study, conducted at the Scott Polar Research Institute (SPRI) at the University of Cambridge, used airborne radar measurements to reveal the lakes underneath the ice sheet.

In our flights, because of the difference in gravitational attraction associated with the presence of water instead of rock beneath the ice tongue, our airborne gravimeter was sufficiently sensitive to duplicate the Autosub measurements and to determine the shape of the cavity beyond the ridge.

A new airborne Light Detection And Ranging (LIDAR) system will be built to enable future interdisciplinary ecological and environmental research involving optical measurements of fish, plankton, water turbidity, and related quantities in lakes and rivers.

Now that the work has been done to combine these airborne measurements, Schroeder said he plans to expand this type analysis to other glaciers, a move that could improve scientists» understanding of the hidden ways climate change is affecting ice.

Earlier this year, a number of research groups was able to coordinate thickness measurements (airborne, surface based and associated deployment of buoys) to help us better understand the ice thickness evolution in this sector of the Arctic.

The overall goal of the exercise was to collect measurements of snow and ice along the Thule Air Base survey track for validation of NASA Operation IceBridge airborne radar systems.

Assessment of fossil fuel carbon dioxide and other anthropogenic trace gas emissions from airborne measurements over Sacramento, California in spring 2009

The scientists use data from airborne Lidar, surface geophysical measurements, and point measurements to explore the complex relationships between different layers of permafrost soil.

These INP measurements supplemented multiple airborne INP measurements on the AAF, and others on the ground during ACAPEX to provide extensive spatial and temporal analyses of INP immersion freezing spectra during winter storm periods.

Johannes Fürst, a researcher at the University of Erlangen - Nuremberg's Institute of Geography in Germany, and colleagues report in Nature Climate Change that they analysed years of ice thickness data from European Space Agency satellites and airborne measurements.

To date, the airborne in situ measurements of the cirrus PSD have contained large uncertainties due to errors in measuring small ice crystals (D ≲ 60 μm).

Long term changes in mass balance, which can verify the accuracy of the annual balance measurements can be made using geodetic methods, such as airborne surface profiling or surface remapping.

With respect to ongoing research, I wonder if a series of high - resolution measurements in the 53 - 57 GHz band from an airborne microwave spectrometer (vertical looking up, vertical looking down and horizontal) under measured conditions of temperature, pressure and humidity might allow improved deconvolution of the satellite data.