Climatology

climo_1.ncl: Compute decadal means and standard deviation for SLP for two different decades, compute the t-statistic, and plot the 5% level as stippling.

Built-in functions used: runave, ttest, ind.

Contributed functions used: clmMonLLT, stdMonLLT, copy_VarCoords.

Shea_util functions used: ShadeLtContour.

climo_2.ncl: Calculates monthly climatologies and then conducts an eof analysis.

Built-in functions used: runave, dimsizes.

Contributed functions used: clmMonLLT, stdMonLLT, eofcov_ts_Wrap.

climo_3.ncl: Demonstrates the use of clmMonLLT and stdMonTLL to derive climatology and the interannual variability. Though this example derives the climatology based on the entire time period, a subset may be used by using either conventional subscripting or coordinate dimensions.

To get the climatology for Jan 1980 through Dec 1989 for this dataset:

prcClm = clmMonTLL (prc(12:131,:,:), using conventional subscripts.

or prcClm = clmMonTLL (prc({198001:198912},:,:), using coordinate subscripting.

climo_4.ncl: Demonstrates the use of clmMonLLT to derive a zonally averaged annual cycle.

Contributed functions used: dim_avg_Wrap.