Sentences with phrase «radiosonde measurements of»

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.

Dr. Angell's focus was on the radiosonde measurements of the atmospheric temperature above the Earth's surface but he also gave results for surface temperature.

As you may recall, they had that discrepancy in radiosonde measurements of the lower troposphere for a decade, until someone finally copped to an algebra mistake in a data - processing procedure.

Miskolci showed that according to NOAA database of radiosonde measurements of infrared transmittance of the atmosphere the transmittance of the atmosphere remained constant for 61 years.

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.

Not exact matches

S&C also saw the benefits of correlating their results to radiosonde measurements as verification, and RSS doesn't.

In conclusion, the research on radiosonde measurement problems looks promising but it is only a small part of a larger problem of poor measurements and poor models.

Furthermore, there have been independent measurements / analysis of dew - point temperature from radiosondes in the Tropics.

Although there is no possibility of a calibration standard for global temperature, the MSU (i.e. RSS and UAH) measurements are almost global in coverage and the radiosondes provide independent measurements for comparison.

Millions of measurements taken by balloon - borne radiosondes do not show it.

Temperature measurements retrieved from the hundreds of balloon - borne radiosonde instruments that are released each day by the various national weather services provide much more detailed information on the vertical structure of atmospheric temperature changes than is available from satellites.

Variations in global - mean temperature are inferred from three different sets of measurements: surface observations, satellite observations, and radiosonde observations.

By 2010 Miskolczi had found proof by using NOAA records of radiosonde measurements going back to 1948.

They have gone through a number of types of radiosondes and the satellite data would indicate the measurement change with the new device since the new radiosondes wouldn't match the satellite data and the old radiosondes would This is the same problem — mandatory objective environmental test standards would give historic continuity.

Some people question the quality of the water vapor measurements made by the radiosondes but I've been informed that Miskolczi believes that the presently published water vapor measurements are the current best bet.

The satellite has the best coverage and suffers least from UHI and errors in TOB homogenisation, station drop outs etc, and is verified independently against radiosonde temperature measurements, but it is only of short duration.

These include the primary surface temperature thermometer records (NASA GISS, NOAA, and HadCRUT); satellite measurements of the lower troposphere temperature processed by Remote Sensing Systems (RSS) and the University of Alabama - Huntsville (UAH); and 5 major reanalysis datasets which incorporate station data, aircraft data, satellite data, radiosonde data, buoy and ship measurements, and meteorological weather modeling.

• the factors that contribute to uncertainties in the trends inferred from three categories of instrumental measurements — Microwave Sounding Units (MSU) carried aboard National Oceanic and Atmospheric Administration (NOAA) satellites, radiosondes, and surface observations;

That means that the uncertainty of the measurement error for the radiosondes and the satellites is negligible.

The black curve represents surface temperature, and the colored curves represent the temperature of the lower to mid-troposphere as inferred from MSU measurements (red) and radiosonde observations (green).

It is a known phenomenon of radiosonde temperature measurement that radiosonde temperature sensors may retain humidity after emerging from cloud, humidity which affects subsequent temperature measurement data.

In considering possible sources of errors in the satellite, radiosonde, and surface - based temperature measurements, it should be noted at the outset that none of these measurement systems was specifically designed for long - term climate monitoring (NRC, 1999).

independence of both the measurement errors and the uncertainties in satellite, radiosonde, and surface - based temperature records, which lends greater confidence to an assessment based on all three measurement categories than to an assessment based on any one of them in isolation.

Temperatures aloft can be measured in a number of ways, two of which are useful for climate monitoring: by radiosondes (balloon - borne instrument packages, including thermometers, released daily or twice daily at a network of observing stations throughout the world), and by satellite measurements of microwave radiation emitted by oxygen gas in the lower to mid-troposphere, taken with an instrument known as the Microwave Sounding Unit (MSU).5 The balloon measurements are taken at the same Greenwich mean times each day, whereas the times of day of the satellite measurements for a given location drift slowly with changes in the satellite orbits.

Mears and others said that the satellite measurements should not be taken seriously because they only infer the temperature from measurements of radio emissions by Oxygen molecules - AND - that these final numbers never match actual temperature measurements made over land and water (ground stations as well as radiosonde).

Atmospheric profiles in North America during the period 2010 - 2011, obtained from archived radiosonde measurements, were analysed in terms of changes in molar density (D) with pressure (P).

Given the data limitations it is concluded that using radiosondes to validate multidecadal - scale trends in MSU data, or vice versa, or trying to use such metrics alone to pick a «winner» is an ill - conditioned approach and has limited utility without one or more of additional independent measurements, or methodological, or physical analysis.»

Radiosonde humidity measurements are notoriously unreliable and are usually dismissed out - of - hand as being unsuitable for detecting trends of water vapor in the upper troposphere.

«Cloud properties under different synoptic circulations: Comparison of radiosonde and ground - based active remote sensing measurements.»

A recent study of water vapor trends above North America based on radiosonde measurements from 1973 to 1993 finds increases in precipitable water over all regions except northern and eastern Canada, where it fell slightly.

However, early radiosonde sensors suffered from significant measurement biases, particularly for the upper troposphere, and changes in instrumentation with time often lead to artificial discontinuities in the data record... Consequently, most of the analysis of radiosonde humidity has focused on trends for altitudes below 500 hPa and is restricted to those stations and periods for which stable instrumentation and reliable moisture soundings are available.

Because the satellite data measure an average temperature through a depth of several kilometres in the atmosphere, they would be expected to compare better with upper - air measurements taken using weather balloons and radiosondes than they would with measurements at the surface.

The radiosondes would provide a check for accuracy / drift of the satellite measurements over time and to provide a solid overlap when calibrating a new satellite or instrument..

To answer this question I looked at more than just the traditional Hadley, NASA and NOAA datasets, but also the measurements of the lower troposphere processed by Remote Sensing Systems (RSS) and the University of Alabama - Huntsville (UAH) as well as the 5 major reanalysis datasets which incorporate station data, aircraft data, satellite data, radiosonde data and meteorological weather modeling.

Using only the wind data (radiosondes and commercia jet measurements), the short term large scale forecast error over the US was just as small as with all additional sources of data combined.

The issue of tropospheric temperature trends is very difficult and has received a great deal of attention by researchers and also assessment reports; the problems are much worse for humidity and few people have even attempted to do anything with tropospheric humidity trends owing to inaccuracies in the radiosonde humidity measurements and substantial uncertainties in the satellite retrievals.

Chris stated they are calibrated to the radiosonde data, but did not elaborate if the calibration for the humidity measurement was good enough to allow satellite data to be used in lieu of radiosonde data.

In my limited understanding, the fundamental problem arises from the fact that old radiosonde measurements show that the relative humidity of the upper troposphere has dropped as the earth has warmed.

The IPCC fifth assessment report concluded:» based on multiple independent analyses of measurements from radiosondes and satellite sensors it is virtually certain that globally the troposphere has warmed and the stratosphere has cooled since the mid-20th century.

The most glaring may be that theory says that the troposphere will warm more rapidly than the surface, but estimates of tropospheric warming from satellites, corellated reasonably well with measurements from radiosonde balloons, show slower warming in the troposphere.

[49] The climate models also overpredict the results of the radiosonde measurements.