<html><head><meta http-equiv="Content-Type" content="text/html charset=gb2312"><meta http-equiv="Content-Type" content="text/html charset=gb2312"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi,all<div class=""><br class=""></div><div class=""><br class=""></div><div class=""> I am regriding some NSIDC sic data (<a href="http://nsidc.org/data/g02202.html" class="">http://nsidc.org/data/g02202.html</a>, downloaded from <a href="ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02202_v2" class="">ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02202_v2</a>).</div><div class=""><br class=""></div><div class="">The source data is curvilinear grids with 2-d longitude coordinate array ranging between -180E~180E£¬ and the destination grids is HadISST 2.2 (<a href="http://www.metoffice.gov.uk/hadobs/hadisst2/" class="">http://www.metoffice.gov.uk/hadobs/hadisst2/</a>)</div><div class=""><br class=""></div><div class="">which is rectilinear grids ranging from 0E to 360E. </div><div class=""><br class=""></div><div class=""> I try to use the original longitude of source grids with the following :</div><div class=""><div class=""><br class=""></div><div class=""> fi = addfile(data_path + data_filename,"r")</div><div class=""> lon = fi->longitude</div><div class=""> lat = fi->latitude </div></div><div class=""> </div><div class=""> y@lat2d = lat</div><div class=""><div class=""> y@lon2d = lon </div></div><div class=""><br class=""></div><div class=""> or reset the longitudes to 0~360E using the following lines:</div><div class=""> </div><div class=""><div class=""> lon = where(lon.lt.0,lon+360,lon) ; -180 ~ 180 longitude order</div><div class=""> lon@units= "degrees_east"</div></div><div class=""> </div><div class="">But I got the same result and the regridded data contain missing values outside the range of -90W~90E.Please see the attached plot file</div><div class=""><br class=""></div><div class="">I don¡¯t know where the problem come from. And I also found no instruction on the NCL webpages explaining the similar case when the curvilinear</div><div class=""><br class=""></div><div class="">grids share different longitude ranges with the destinate grids. So anyone can show me a hand?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">The script file, source data file , contour plot files with original data and regridded data have been attached.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Thanks!</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Lin</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""></div></body></html>