Sentences with phrase «using atmospheric measurements»

The most significant is that the UT Austin study looked only at the production stage of natural gas, while the Harvard study used atmospheric measurements to estimate methane emissions from all sources.

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.

Not exact matches

The measurement method using the harmonic interferometer that we have developed does not depend upon gas composition used when plasma is produced, as compared to other electron density diagnostic methods for atmospheric pressure low - temperature plasma.

Using this method that has been developed by high - temperature plasma diagnostics, as shown in Image 2, we have succeeded in greatly reducing the influence of atmospheric pressure (gas), which was a problem in high - accuracy measurement of atmospheric pressure low - temperature plasma.

«We had to use the best telescope in the world under the best atmospheric conditions, and we had to set up the proper team — but most of all this measurement was really challenging because of the faintness of the source.»

In the new paper, published in the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activities.

Bringing together observed and simulated measurements on ocean temperatures, atmospheric pressure, water soil and wildfire occurrences, the researchers have a powerful tool in their hands, which they are willing to test in other regions of the world: «Using the same climate model configuration, we will also study the soil water and fire risk predictability in other parts of our world, such as the Mediterranean, Australia or parts of Asia,» concludes Timmermann.

Pétron says that more studies are needed using industry inventories and measurements of atmospheric concentrations.

The work included data from a variety of sources, including national emissions inventories kept by the United Nations, global estimates of energy use and direct measurements of atmospheric CO2 concentrations, and involved dozens of authors from institutes around the world.

Meteorologists have long used a similar technique to integrate atmospheric and oceanic measurements with dynamical models, allowing them to forecast the weather.

Measurements from these sensors would be used to derive properties of atmospheric aerosols, clouds, and oceanic constituents.

Measurements such as these may serve as an indicator of oceanic behavior, much as other indices are used to keep track of atmospheric climate.

Researchers used 10 years of atmospheric site measurements, confirming those results using a cloud - resolving computer model.

PNNL is using an integrative research approach that draws on our depth and breadth of capabilities in atmospheric chemistry, climate physics, modeling, and measurement to address critical scientific questions related to the role of aerosols in the climate system.

Dargaville, R.J., et al., 2002: Evaluation of terrestrial carbon cycle models with atmospheric CO2 measurements: Results from transient simulations considering increasing CO2, climate, and land - use effects.

Also, atmospheric measurements of the amounts of methane released by permafrost (a top - down approach) are far less than estimates of these amounts made using point - based field assessments and ecosystem modeling (bottom - up approaches).

Find out how researchers are using data from U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility — the world's most comprehensive outdoor laboratory and data archive for research related to atmospheric processes that affect Earth's climate — to improving regional and global climate models.

Find out how researchers are using data from the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility — the world's most comprehensive outdoor laboratory and data archive for research related to atmospheric processes that affect Earth's climate — to improve earth system models.

The patterns of salinity change can be used to infer changes in the Earth's hydrological cycle over the oceans (Wong et al., 1999; Curry et al., 2003) and are an important complement to atmospheric measurements.

We find (i) measurements at all scales show that official inventories consistently underestimate actual CH4 [methane] emissions, with the natural gas and oil sectors as important contributors; (ii) many independent experiments suggest that a small number of «super-emitters» could be responsible for a large fraction of leakage; (iii) recent regional atmospheric studies with very high emissions rates are unlikely to be representative of typical natural gas system leakage rates; and (iv) assessments using 100 - year impact indicators show system - wide leakage is unlikely to be large enough to negate climate benefits of coal - to - natural gas substitution.

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

we use global - scale atmospheric CO2 measurements, CO2 emission inventories and their full range of uncertainties to calculate changes in global CO2 sources and sinks during the past 50 years.

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).

In 1990, he joined with a colleague, Roy Spencer, to use measurements taken by NASA satellites since 1979 to produce the first global atmospheric temperature data.

We will interpret recently completed measurements of 35 chemical - proxies in the ice - core and relate these to similar studies in other Arctic ice cores, such as by using real - world contaminant transport to validate atmospheric circulation models and chemical - signature sourcing.

Initial condition uncertainty arises due to errors in the estimate of the starting conditions for the forecast, both due to limited observations of the atmosphere, and uncertainties involved in using indirect measurements, such as satellite data, to measure the state of atmospheric variables.

Among the criteria that Callendar used to reject measurements were any that deviated by 10 % or more from the average of the region, and any taken for special purposes such as such as «biological, soil, air, atmospheric pollution».

Nevertheless, this first attempt to estimate urban - scale CO2ff from atmospheric radiocarbon measurements shows that CO2ff can be used to verify and improve emission inventories for many poorly known anthropogenic species, separate biospheric CO2, and indicates the potential to constrain CO2ff emissions if transport uncertainties are reduced.

Using SCIAMACHY satellite data as well as ground - based measurements from 2003 to 2009, researchers found that the region where Arizona, New Mexico, Colorado, and Utah intersect had atmospheric methane concentrations equivalent to about 1.3 million pounds of emissions a year.

In addition to treating cloud transmission based only on the measurements at the local time of the TOMS observations, the results from other satellites and weather assimilation models can be used to estimate atmospheric UV irradiance transmission throughout the day.

The changes in the atmospheric abundance of individual gases are shown in the lower panels using a combination of direct atmospheric measurements, estimates of historical abundance, and future projections of abundance.

We conduct measurements of atmospheric temperature and humidity profiles using air - deployed drop - sondes and remote sensing measurements.

In this data activity, students use NASA satellite measurements of atmospheric pressure to learn that pressure decreases with height in the atmosphere.

In a novel application of space - based atmospheric measurements, Atmospheric and Environmental Research (AER), in collaboration with GeoOptics Inc., is investigating the use of radio occultation measurements to improve severe weather forecasting.

In conclusion, the present atmospheric measurement network, current information on air - sea fluxes and current understanding of vertical atmospheric transport are not sufficient to allow full use of the potential of inverse modelling techniques to infer geographically detailed source - sink distributions of anthropogenic CO2.

Maintaining and enhancing the current observational network of remotely sensed and in - situ measurements that can be used to infer changes in the atmospheric circulation is essential.

We're used to this in evaluating atmospheric CO2 measurements.

With the ever increasing divergence of surface temperatures (NASA GISS) from satellite ones (UAH / RSS), and the subsequent divergence of overheated climate models (IPCC CMIP5) to observed reality, it is worth some background on the atmospheric temperature measurement systems used to measure the temperature of the lower troposphere — the exact place where global warming theory is meant to occur and be measured:

Reconstructions of the worldwide trend of GEM concentrations have been attempted using all direct measurements of atmospheric GEM available since 1977.

We validated parameterization of the model diffusivity using CH4 and three halocarbon species (CFC11, CFC113, and CCl4) for which atmospheric histories have been estimated from emission scenarios and real - time measurements (60 — 62).

If you have good measurements of upper ocean and atmospheric temperatures, then if you had a good decade - long satellite record of the Earth's total radiative energy balance from space — say, if Triana has been launched to in the late 1990s — then you could use conservation of energy to calculate the rate of heat uptake by the deep ocean over the past ten years.

I read somewhere that NASA recently was able to start using 2 drones for atmospheric measurements.

Folks who do combustion, solar physics and atmospheric measurements understand that in such systems where the light source (s) are at the same temperature as the absorbers you can not naively use the absorption coefficient

Matrosov S. Y. and D. D. Turner (March 2018): Retrieving mean temperature of atmospheric liquid water layers using microwave radiometer measurements.

Yet the published atmospheric humidity measurements he uses are so controversial that few are willing to even address his findings.

Another way to test the importance of atmospheric changes would be to calculate both the TOA and surface forcing using the satellite measurements, and then impose this transient forcing in a general circulation model that calculates both the atmosphere and ocean response.

Zhanqing Li, lead author of a paper published in Nature Geoscience and University of Maryland atmospheric scientist, says, «Using a 10 - year dataset of atmospheric measurements, we have uncovered the long - term, net impact of aerosols on cloud height and thickness and the resulting changes in precipitation frequency and intensity.»

In 2016 I had another attempt using actual atmospheric emissivity measurements.

Published in the journal Geophysical Research Letters on Thursday, the study uses satellite observations to demonstrate that the decline in atmospheric chlorine that resulted from the implementation of the Montreal Protocol, enacted in 1989, has led to «about 20 percent less ozone depletion during the Antarctic winter than there was in 2005 — the first year that measurements of chlorine and ozone during the Antarctic winter were made by NASA's Aura satellite.»

Waterproof fitness trackers are rated using the ATM measurement which stands for the atmospheric pressure unit the device can withstand unde...