<div dir="ltr">Hi Erik,<div><br></div><div>month_to_season gives you as many seasons as you have full years in your data. So if your data has 13 years then you will end up with 13 values for DJF with the first one only being computed for JF in the first year. The last december value will be ignored, because that would be the 14th season.</div><div><br></div><div>Does that help?</div><div><br></div><div>Maria</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 19, 2015 at 12:56 AM, Erik Jan Schaffernicht <span dir="ltr"><<a href="mailto:eschaffe@uni-koeln.de" target="_blank">eschaffe@uni-koeln.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I am not sure how month_to_season() function works for DJF (and NDJ is probably similar).<br>
<br>
Say, I select "DJF"<br>
<br>
I take the years like this:<br>
[snip]<br>
iYYYY= ind(YYYY.ge.1979 .and. YYYY.le.2003)<br>
slp= ifle->slp(iYYYY,:,:) + ... (further steps, input from ncep slp <a href="http://data.nc" target="_blank">data.nc</a>, and I flip some dimension to make it fitting to formal requirements)<br>
slpSeason= month_to_season(slp, "DJF")<br>
[snip]<br>
<br>
What does the month_to_season() exactly do?<br>
<br>
My understanding of 'what belongs to a season' written down looks like this, if I group it by DJFseason:<br>
<br>
1979-Jan and 1979-Feb<br>
1979-Dec and 1980-Jan and 1980-Feb<br>
...<br>
2002-Dec and 2003-Jan and 2003-Feb<br>
2003-Dec<br>
<br>
How does month_to_season() process this?<br>
It says that DJF takes only two months? Does it mean only two for the first entry of this list, i.e. 1979-Jan 1979-Feb but thereafter it takes always three, so 1979-Dec + 1980-Jan+1980-Feb, so three months in general except for one exception at the beginning?<br>
Or is it always<br>
1979-Jan-Feb<br>
1980-Jan-Feb<br>
1981-Jan-Feb, so December is skipped completely? Then the "*D*JF" is confusing!?<br>
<br>
And what happens to the 'lonely' 2003-Dec? It has no neighbouring DJFmonths due to time range selection by years AD. Is it skipped? Or is it: "take this month and define it as a season"?<br>
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<br></blockquote></div><br></div>