Sentences with phrase «from measurements networks»

In this study, we approach the issue of errors resulting from measurements networks of varying densities from a purely field measurement perspective.

On Columbia Glacier, we used a measurement network with a maximum density of 375 points / km2, and a maximum spacing between points of 90 m and a mean spacing of 45 m. Annual mass balance (1984 - 1998) was typically determined on Columbia Glacier from a measurement network with a spacing of 187 points / km2 (Pelto, 1996), and a mean spacing of 50 m.

On Columbia Glacier in the North Cascades, Washington and Lemon Creek Glacier Juneau Icefield, Alaska, we determined annual mass balance from measurement networks of varying density.

Not exact matches

In place of physical stores, it has a network of more than 450 commissioned sales agents throughout the country who visit shoppers» homes, take their measurements, and help them select bras (prices, which range from $ 40 to $ 80, include a complimentary fitting session).

The CO2 is sampled from air that is above the Boundary Layer; ostensibly free from surface effects.The Keeling Curve has the longest history of CO2 continuous measurements; but over the past 50 years a network of similar stations has become active.

Ben's research focuses on the measurement of political preferences from survey, voting, network and text with a particular focus on using text data.

O'Keefe said the flood in the village shows the limits of flash flood forecasting, which relies on Doppler radar; rainfall measurements from ground stations, like the New York State Mesonet, a network of more than 120 weather stations across the state; and reports from ground observers.

For this purpose, the researchers have thoroughly evaluated the earthquake activity by combining the two major Turkish Earthquake Measurement Networks with measurement data from the GFZ Plate Boarder Observatory within the framework of a German - Turkish cooperatiMeasurement Networks with measurement data from the GFZ Plate Boarder Observatory within the framework of a German - Turkish cooperatimeasurement data from the GFZ Plate Boarder Observatory within the framework of a German - Turkish cooperation project.

In 2014, Australian coastal researchers called for the creation of a national coastline observatory, with basic data — such as sub-aerial profiles, bathymetry and inshore wave forcing measurements — collected routinely from a network of around 20 «representative» beaches across Australia.

They pinned more faith on a local system developed for them by the Institute of Hydrology in Wallingford, Oxfordshire, which bases its predictions on rainfall measurements collected electronically from a network of rain gauges.

By comparing recent measurements with results from new models, the network challenged the long - debated assumption that the Sun's slight change in radiation could cause Earth's climate to change.

He and UA geologist Gregory Leonard called on colleagues in the Global Land Ice Measurements from Space (GLIMS) network that Kargel led to help identify affected areas by using satellite imagery.

In addition to the measurements, the researchers are evaluating publicly accessible data from social networks like Twitter, Facebook, Flickr and Instagram.

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.

Using U.S. Weather Service data on precipitation, radiosonde measurements of CAPE and lightning - strike counts from the National Lightning Detection Network at the University of Albany, State University of New York (UAlbany), they concluded that 77 percent of the variations in lightning strikes could be predicted from knowing just these two parameters.

Jun Yang and his colleagues used the technique of very long baseline interferometry (VLBI), where a network of detectors separated by thousands of kilometres are combined into a single observatory, to make extremely high - precision measurements of the jet from Swift J1644 +57.

In previous work, air measurements from planes and a sparse network of monitoring towers have revealed that the inventory - based numbers are coming in low — roughly 50 percent low.

The team, from the MRC - PHE Centre for Environment and Health, estimated air pollution levels in the areas where the individuals lived in 1971, 1981, 1991 and 2001, using measurements from Britain's extensive historic air pollution monitoring networks.

«Breathing» of the terrestrial biosphere: lessons learned from a global network of carbon dioxide flux measurement systems.

In an absolute monarchy, the monarch rules as an autocrat, with absolute power over the state and government — for example, the right to The instrumental temperature record provides the temperature of Earth's climate system from the historical network of in situ measurements of surface air

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.

«The study also showed us how important it is to maintain a comprehensive measurement network and to develop and use scientific methods that help us distinguish the changes from the natural variation in climate in a reliable way», Laine explains.

Aside from continuing to misunderstand that the «missing heat» is about having an inadequate global climate observational network (mainly because we don't have good measurements of deep ocean heat), observational data have demonstrated that water vapor, and likely clouds, are indeed positive feedbacks.

The annual balance in meters of water equivalent determined from field measurements networks of varying number of measurement sites on Columbia Glacier.

We calculated the mass balance for each measurement network simply from the mean of all the observations, without biasing the results according to the representativeness of the specific sites.

A measurement network of 1 point / km2 yielded an error of +0.15 m / a, ranging from -0.07 m / a to — 0.24 m / a.

To ascertain the annual balance of a glacier from a sparse network of observations is optimized by detailed mapping of mass balance across the glacier determined from a high - density measurement network during several years.

To conduct the research, a team of scientists led by John Fasullo of the US National Center for Atmospheric Research in Boulder, Colorado, combined data from three sources: NASA's GRACE satellites, which make detailed measurements of Earth's gravitational field, enabling scientists to monitor changes in the mass of continents; the Argo global array of 3,000 free - drifting floats, which measure the temperature and salinity of the upper layers of the oceans; and satellite - based altimeters that are continuously calibrated against a network of tide gauges.

We compared the mass balance results from a dense network of measurements with variously sparse networks, to determine the error resulting from using increasingly sparse networks.

Measurements from ground - based sun photometer networks can be used both to provide a ground - truth validation of satellite aerosol retrieval sand to produce a land - based aerosol climatology which is complementary to satellite retrievals that currently are being performed mostly over ocean.

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.

Archived total ozone column measurements from the World Meterological Organization (WMO)- Global Atmosphere Watch (GAW) network routinely deposited at the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) in Toronto, Canada (http://www.woudc.org) are utilized for the ground - based measurements reference.

Let's suppose this position is correct, but when creating the global average I cut the percentage of rural stations in the measurement network from 75 % to 25 % (sorry don't know the real numbers).

The adjusted USHCN CONUS temperatures are well aligned with recent measurements from NOAA's U.S. Climate Reference Network (designed with the highest climate monitoring standards for siting and instrument exposure), thus providing independent evidence that the USHCN provides an accurate measure of the U.S. temperature.

Using U.S. Weather Service data on precipitation, radiosonde measurements of CAPE and lightning - strike counts from the National Lightning Detection Network at the University of Albany, State University of New York (UAlbany), they concluded that 77 percent of the variations in lightning strikes could be predicted from knowing just these two parameters.

From the GAO link above and the accompanying docs it is clear the USHCN network has not been managed at a consistent level of quality (even for the «old» site standards) and precision of measurements:

Since the TAR, availability of new data from various measurement networks and from national reporting documents has enabled re-estimates of CH4 source magnitudes and insights into individual source strengths.

Tying the ground - based network to remotely sensed observations from Earth - observing satellites will bridge measurement scales to form a molecular - to global - scale observation platform.

The use of a high measurement density and consistent methods provides that errors resulting from an imperfectly representative measurement network are largely consistent and correctable (Pelto, 1996, 1997, 2000).

Using surface measurements of maximum and minimum temperatures from the Global Daily Climatological Network data set, we find evidence of a weekly cycle in diurnal temperature range (DTR) for many stations in the United States, Mexico, Japan, and China.

If global warming does not fit the observable temperature measurements, then a new «reality» must be invented to fit the ideology: actual temperature records must be altered or dismissed — hundreds of temperature - reporting stations in colder areas worldwide were eliminated from the global network so the average temperature is higher than when those stations were included link.

The new study is based on data from a worldwide NASA - funded measurement network.

Global average temperature The mean surface temperature of the Earth measured from three main sources: satellites, monthly readings from a network of over 3,000 surface temperature observation stations and sea surface temperature measurements taken mainly from the fleet of merchant ships, naval ships and data buoys.

We did so by estimating monthly fluxes and their uncertainty over a one - year period between June 2009 and May 2010 from 1) observational data collected in existing networks of surface CO2 measurement sites (GLOBALVIEWCO2 2010; extrapolated to the year 2010) and 2) both the surface observations and column - averaged dry air mole fractions of CO2 (XCO2) retrieved from GOSAT soundings.