Sentences with phrase «calculated trend»

The program calculates trends in temperature anomalies — not absolute temperatures — but changes relative to the average temperature for the same month during the period of 1951 - 1980.

One can also calculate the trends over successive periods of, say, ten years, with start - points separated by one year.

The minimum number of years required to calculate a trend value is 18.

This conclusion depends on the way they have used the raw data to calculate their trend line.

The satellite observations of temperature and water vapor are reasonably consistent with the model results (Figure 1), making us more confident that we can calculate their trends correctly.

This is done by calculating the trend for the secular long - term trend that is monotonic, not based on the 30 - years least squares trend.

SteveM's recent post attempts to say RogerP's prediction was correct by calculating the trend difference for just the ocean record, not the global record.

[For those counting: the count of their respective calculated trend points are as follows: 459 calculated points; 447 calculated points; 435 calculated points.]

But since neither of those tell the right story, I suppose the best option is to simply copy over the + / - 0.2 from the Monaghan reconstruction trend, or the uncertainty from the properly calculated trend.

We don't use PCA to calculate the trend on the instrumental temperature record.

Calculated trends do not predict the future trends.

In calculating no trend between «windy» and «calm» days (with wind data obtained from NCEP / NCAR Reanalysis), Parker (2006), in effect, states that there is no modulation to speak of — in and of itself, that is a remarkable statement, or else there is no UHI to speak of.

However, its very curious, oblate sun refraction method agrees with Raobcore calculated trends at the same location, which is for a warmer lower troposphere at virtually every year, but not with the actual radiosonde measurements varying a lot, which is strange...... This leads me to conclude that Raobcore resolution needs to be increased... But this depends on whether my interpretation of Raobcore is right, which is the most accurate, corrected perfect data available.

The package uses an efficient implementation of Sen's slope method (Sen, 1968) to calculate trend magnitude and provides two options for removing lag - 1 autocorrelation (the correlation of a given time series with its own earlier values) and computing the significance of trend: Xuebin Zhang's (Zhang, 1999) and Yue - Pilon's (Yue, 2002).

Used Excel to calculate trends utilizing the built - in slope function; plots created by Excel.

A Hurst value of greater than 0.5 is indicative of «long range persistence» and complicates issues of calculating trend uncertainties and the like.

On the chart, the 12 - month first and last calculated trend points are marked as red dots; for the 24 - month first and last, the representation marks are the blue dots; and for the 36 - month first and last, those are designated by the two bright green circles.

These three data sets are loaded into a computer analysis program — available for public download from the GISS web site — that calculates trends in temperature anomalies relative to the average temperature for the same month during 1951 - 1980.

One can not simultaneously claim that the period 1945 to 1980 was artificially cooled by aerosols and then calculate a trend from that artificially cooled point as if it were purely CO2 warming as opposed to aerosol - reduced recovery.

jgnfld @ 255, It is true that normal people would agree that some manner of calculated trend is infinately preferable to somebody poking a grubby finger at convenient maxima or minima.

Depending on the details that might or might not be appropriate — for instance, averaging the runs and calculating the trends from the ensemble means would incorrectly reduce the size of the envelope, but weighting the contribution of each run to the mean and variance by the number of model runs might be ok.

The minimum number of years needed to calculate a trend value is 66 years for 1901 to 2005 and 18 years for 1979 to 2005.

If you were to calculate the trend for that period, the decline would be way steeper than the longer term trend shown on the graph I linked, since extent in 2001 happened to be relatively high.

The calculated trend should be the same.

Actually, we are not entitled to extrapolate any of these calculated trends unless we have a separately verified physical explanation for the trend to which the data (all of it) conforms.

The idea is that you calculate the trends in the observations to 2008 starting in 2003, 2002, 2001....

The idea is to define area masks as a function of the emissions data and calculate the average trend — two methods were presented (averaging over the area then calculating the trend, or calculating the trends and averaging them over the area).