Hi,
you can merge the files by using CDO as the following
>cdo mergetime ifile1 ifile2 ifile3 ifile4 ..... ofile
ifile is the input file and ofile is the output file
THANKS

Mohamed Ibrahim El-Sayed OMAR

Egyptian Meteorological Authority

Scientific Research Department

Climate Studies Centre
Kobry El-Quobba, P.O.Box. 11784
Cairo, EGYPT

Mobil phone : 002 0160802805
Home Phone : 002 0482370261

From: Xuejia Wang <wangxuejia86@163.com>
To: RegCNET@lists.ictp.it
Sent: Sat, June 11, 2011 8:25:53 PM
Subject: [RegCNET] convert many nc files into one

Hello, everybody！

I have a question want to consult. I have download 60 nc files(shtfl.sfc.gauss.1951.nc-shtfl.sfc.gauss.2010.nc). Is there any way to make these files become one, which I can handle the synthetic file with Grads? Any suggestions will be appreciated.

Thanks a lot！