Sentences with phrase «from aircraft measurements»

So, a sea ice estimate for a region constructed from shipping reports in the 1920s might not be directly comparable to an estimate for the same region from the 1940s made from aircraft measurements.

Not exact matches

In contrast, the method used by Miller and his colleagues, called a top - down method, uses measurements of methane in the atmosphere, taken from a national network of greenhouse gas monitoring stations and aircraft measurements conducted by the National Oceanic and Atmospheric Administration and the Department of Energy.

«And, we have gained even finer detail in some parts of the crust, such as beneath Australia, where measurements from aircraft have mapped at resolution of 50 km [30 miles].

These data include new aircraft observations from the northern permafrost region (e.g., the NASA Arctic - Boreal Vulnerability Experiment) and measurement of sea - air gas exchange (e.g., the U.S. Geological Survey (USGS) Gas Hydrates Project).

He has now updated his research using data from previous studies that relied on satellite and aircraft measurements of emissions above oil and gas fields.

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.

This is a well - established methodology, pushed to constrain US anthropogenic emissions by including measurements from aircraft and communications towers in addition to the ever - invaluable NOAA flask sample network, and incorporating socioeconomic and industrial data.

Another approach is to take aircraft, tower, and other measurements, and try and infer the strength and identity of sources from anomalies in gas concentrations sampled from wide area.

Alaska Arctic Tundra CH4 Flux Study — Impacts of AGW / CC Published 8 - Jan 2018 Estimating regional - scale methane flux and budgets using CARVE aircraft measurements over Alaska Conclusions Analysis of CH4 column enhancements supplemented by simulated atmospheric transport allowed us to estimate the monthly - mean CH4 fluxes from our study domain (50 — 75 N, 130 — 170 W).

The accuracy of RRTMG is verified through comparison to AER's reference radiation code LBLRTM, which is directly validated with atmospheric measurements provided by high - quality spectral measurements from satellite -, aircraft - and ground - based instruments.

The Trump administration has killed NASA's Carbon Monitoring System, which was responsible for compiling data from separate satellite and aircraft measurements of CO2 and methane emission across the Earth.

These data include new aircraft observations from the northern permafrost region (e.g., the NASA Arctic - Boreal Vulnerability Experiment) and measurement of sea - air gas exchange (e.g., the U.S. Geological Survey (USGS) Gas Hydrates Project).

A recent study highlights results obtained from an aircraft ocean survey that targeted a large warm core eddy in the eastern Caribbean Sea, where upper ocean measurements are crucial to understanding the complexities of heat and moisture transfer during the passage of tropical cyclones.

The FAst - physics System TEstbed and Research (FASTER) Project has constructed case studies from the Atmospheric Radiation Measurement Climate Research Facility's Southern Great Plain site during the RACORO aircraft campaign to facilitate research on model representation of boundary - layer clouds.

Salstein looked at wind and pressure measurements from a National Weather Service analysis that makes use of a combination of ground - based, aircraft, and space - based observations.

These methane measurements come from Hiaper Pole - to - Pole Observations, which uses aircraft loaded with scientific instruments flying long distances at varying altitudes.

We compare aircraft observations to modeled CH4 distributions by accounting for a) transport using the Stochastic Time - Inverted Lagrangian Transport (STILT) model driven by Weather Research and Forecasting (WRF) meteorology, b) emissions from inventories such as EDGAR and ones constructed from California - specific state and county databases, each gridded to 0.1 ° x 0.1 ° resolution, and c) spatially and temporally evolving boundary conditions such as GEOS - Chem and a NOAA aircraft profile measurement derived curtain imposed at the edge of the WRF domain.

Seventeen global black carbon models were compared with measurements from ground networks, aircraft and satellite and found to generally have enough «soot» but to underestimate absorption.

Figure 2, above: Aircraft BC concentration profiles from the surface (high pressures) to the upper atmosphere (low pressures) from measurements (black) and individual AeroCom models (colored) for the North American south (left panel) and Arctic (right panel).

The measurement program includes around the clock measurements at 4 baseline observatories and 8 tall towers, air samples collected by volunteers at more than 50 sites, and air samples collected regularly from small aircraft mostly in North America.

Aircraft measurements confirm that methane emissions from northern European wetlands exhibit a uniform regional carbon isotopic signature, despite considerable ground - level heterogeneity.

Values are considered fairly reliable after about 1950 when measurements from reconnaissance aircraft began.

Schwietzke S., G. Pétron, S. Conley, C. Pickering,..., C. W. King, A. B. White, L. Bianco and R. C. Schnell (May 2017): Improved Mechanistic Understanding of Natural Gas Methane Emissions from Spatially Resolved Aircraft Measurements.

Satellite - based altimetry measurements, often supplemented by similar measurements from aircraft, hold promise for obtaining basin - scale ice thickness information (e.g., Laxon et al., 2003; Giles et al., 2008; Kwok et al., 2009) and currently provide about a decade - long record.

Francis, P.N., P. Hignett, and A. Macke, 1998: The retrieval of cirrus cloud properties from aircraft multi-spectral reflectance measurements during EUCREX» 93.

The study's authors, led by researchers from Harvard University, used atmospheric measurements of methane — a greenhouse gas at least 25 times as powerful at trapping heat as CO2 — from aircraft and stationary towers.