Sentences with phrase «using radiosonde»

It has been noted that the poor vertical resolution of the satellite temperature retrievals makes it difficult to estimate the forcing; in fact, a similar calculation using radiosonde - based temperatures yields a value of -0.1 Wm - 2 / decade (Shine et al., 1998).

He has been working on the predictability studies using radiosonde observations and data assimilation technique.

Together with colleagues at MIT, the University of Michigan, the Instituto Nacional Presquisa Espaciais, Brazil, and the University of California, Irvine, Wang studied an area of rainforest in the Rondonia, Brazil using radiosonde data taken in 1994 as part of the Rondonian Boundary Layer Experiment (RBLE - 3) under the Anglo - Brazilian Amazonian Climate Observation Study (ABRACOS).

The reason for not using the radiosondes directly is that they have rather spotty spatial coverage.

I notice that they use the radiosondes for a reference too.

While all commonly used radiosondes have nominal temperature accuracy of 0.1 or 0.2 K, these accuracies are verified only in highly idealized laboratory conditions.

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.»

A long - term dataset of upper - air temperatures for Australia, measured using radiosondes, is currently being prepared by the Bureau.

Not exact matches

The heavier weight of the ozone - measuring equipment, compared to a normal radiosonde, means she has to use bigger balloons.

«Using more recent data and better analysis methods we have been able to re-examine the global weather balloon network, known as radiosondes, and have found clear indications of warming in the upper troposphere,» said lead author ARC Centre of Excellence for Climate System Science Chief Investigator Prof Steve Sherwood.

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.

Another question: Have the proposed homogeneization procedures been used also to see if radiosondes data in the remaining NH or SH need a correction as well?

[blockquote] The water vapour positive feedback theory has already been comprehensively disproven by independent investigations by Douglass, Lindzen, Paltridge and Spencer, inter alia (who used satellite data and radiosondes to reach their conclusions and showed that the posited feedbacks are either missing or negative).

For simplicity, I will use the data mean and the average sigma of the data sets to represent a «typical» radiosonde data set.

Even using your 2 - sigma levels, 4 of the 7 radiosonde data sets have trend averages that lie outside the 95 % confidence interval for the models.

This may partly be due to the coverage of sondes used in that analysis being biased to the high latitudes (since the effect of the error was principally in the tropics), or it may be because of undetected biases in the radiosonde network itself.

It turns out that the radiosonde data used in this paper (version 1.2 of the RAOBCORE data) does not have the full set of adjustments.

Radiosonde measurements and reanalysis data are used to examine long - term changes in tropopause behavior in the subtropics.

What the global change community (through the NRC and CCSP reports) always asserted and then used to discount the radiosonde and UAH satellite trends was that the deep troposphere should not warm less than the surface and in fact based on models globally the troposphere should warm 1.2 more (the amplification factor).

I do them myself two ways, one while using the sun as a fixed sphere of reference, the other by taking all of upper air radiosonde data, condensating them to one readable number in degrees Kelvin.

I am surprised that there are arguments about radiosondes vs satellites when there is another source that could be used for validation.

To reduce the variability and bias introduced into the QME AERI / LBLRTM radiance residuals, the moisture profiles from each radiosonde are scaled such that its total precipitable water vapor matches that retrieved from the microwave radiometer (MWR), and these scaled profiles are used to drive the model.

Their reports could easily be used as another validation of satellite or radiosonde data.

Where can I find the list of radiosonde station observations used in ERA - Interim?

The main ECMWF reanalysis webpage (www.ecmwf.int/research/era) has some information about observations used in ERA - Interim, including a timeline (http://www.ecmwf.int/research/era/do/get/index/29/29?showfile=true) and a complete inventory of radiosonde observations (http://www.ecmwf.int/research/era/do/get/index/29/28).

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

As is clear from a reading of his papers, Miskolczi's infra - red optical depth is no more than a quantity calculated from radiosonde data through the use of a precise and well - constructed radiative transfer algorithm.

Above the routine maximum height of the radiosonde data (above levels where atmospheric pressure drops below 100 millibars, at about 17 km [10.5 miles]-RRB-, rocketsondes, rocket - borne grenades, and falling sphere experiments have been used to monitor the thermal structure of the upper atmosphere.

Meteorological observations from radiosondes are also applied to benchmark the numerical weather prediction models used to forecast day - to - day weather.

Used in conjunction with Earth - orbiting satellite - based passive temperature and moisture radiometric soundings, as well as active lidar wind measurements, profilers complement the data collected from radiosondes.

[Because the IPCC use many models, and though hardly any of them even overlap the UAH and radiosondes, I guess they could find a few?

Previously reported discrepancies between the amount of warming near the surface and higher in the atmosphere have been used to challenge the reliability of climate models and the reality of human - induced global warming... This significant discrepancy no longer exists because errors in the satellite and radiosonde data have been identified and corrected.

This air conditioned storage container holds supplies needed for launching radiosondes using the automated Balloon - Borne Sounding System.

Using a longer period would made the match of surface and radiosonde observation to models much worst in the period before 1979.

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.

Balling & Cerveny (2003) using the US radiosonde network, find a statistically significant inverse correlation between GCR flux and low cloud cover over the continental United States.

Now today when you run a physics model to predict the temp 6 hours out you use all the observations you have satellite, radiosondes, airplanes, ground stations, pressure, temperature, etc..

Dessler et al. published a paper which used the change in the velocity of radiosonde balloons, instead of the on board instrumentation to show the the tropical troposphere hot spot did exist even though the correlation of the data required some serious creativity.

If a good calibration can be obtained, then the satellite data could (and should) be used in lieu of the radiosonde data.

Re: Ryan Maue (# 5), Ryan, didn't HAimberger et al use ERA - 40 reanalysis in their radiosonde stuff that was involved in Santer and Schmidt v Douglass?

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.

Radiosonde locations are quickly plotted (from ERA - 40 data ingest for January 1, 2001): There are on the order of 700 stations used with the highest density in the Northern Hemisphere especially in Norther America and Central Europe.

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.

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.

As we discussed in our paper, if one takes out the «no radiosonde data» squares from the output of the NCEP model, the averages of the remaining squares (about 2 % of the total) tell much the same story as when one uses all of them.

So the team would have us believe that the radiosonde data is crap but AWS stations used to construct positive temperature trends in Antarctica are reliable and robust... what a joke!

I have read papers by Christy (I think) where the authors used change points to adjust radiosonde data (where they corresponded with instrument changes) and found a better fit with satellite data.

There may be perfectly good reasons why the radiosonde data used in this paper is reliable while older radiosondes making (easier?)

For instance, the response time for sensors in radiosondes (that are used to track atmospheric profiles of temperature and humidity) has steadily improved which, if uncorrected for in the reanalyses, would lead to an erroneous drying in the upper troposphere that has nothing to do with any actual climate trend.

Radiosonde data is not used because it is not on message.