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<div dir="ltr" data-setdir="false" style="font-size: 16px;">Dears Ian and Kwesi,</div><div dir="ltr" data-setdir="false" style="font-size: 16px;">I really appreciate for your helpful comments. I learnt much from them. However, about Kwesi's comment, may I ask why someone wanna interpolate higher resolution to the lower resolution, as you said "<span><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial;">That is why more commonly higher resolution grids would be interpolated to lower resolution</span></span>".</div><div dir="ltr" data-setdir="false" style="font-size: 16px;"><br></div><div dir="ltr" data-setdir="false" style="font-size: 16px;"><br></div><div dir="ltr" data-setdir="false" style="font-size: 16px;">May I ask more help?</div><div dir="ltr" data-setdir="false" style="font-size: 16px;">My work included different grid data with different spatial resolution; 0.1, 0.5 and 0.75 degree. I think I should reply to the referee related to these spatial resolution differences which included in my work, maybe the influence of these differences in the interpolation.</div><div dir="ltr" data-setdir="false" style="font-size: 16px;">The referee asked: "<span style="font-family: Verdana, sans-serif; font-size: 8.5pt;">Please discuss also the
spatial scale resolution differences in products and interpolation
implications."</span></div><div dir="ltr" data-setdir="false" style="font-size: 16px;"><br></div><div dir="ltr" data-setdir="false" style="font-size: 16px;"><br></div><div dir="ltr" data-setdir="false" style=""><i style=""><font size="2">Sincerely,</font></i></div><div dir="ltr" data-setdir="false" style=""><i style=""><font size="2">Ehsan</font></i></div><div style="font-size: 16px;"><br></div>
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On Saturday, July 18, 2020, 12:00:41 PM GMT+4:30, Kwesi A. Quagraine <starskykwesi@gmail.com> wrote:
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<div><div id="yiv8752248087"><style>#yiv8752248087 body{font-family:Calibri, Arial;font-size:13px;}</style><div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">Dear Ehsan,</div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;"><br clear="none"></div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">Follow from Ian’s explanation; as an example, lower resolution grids have less spatial variance than higher resolution grids and interpolating the lower resolution to a higher resolution does not change this. Thus taking a lower resolution grid to a higher resolution grid does not add information. The interpolated data will have low spatial and temporal variance.</div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">That is why more commonly higher resolution grids would be interpolated to lower resolution. </div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;"><br clear="none"></div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">This information has to be explicitly stated in your paper; because there are some analysis that are sensitive to interpolation and readers have to bear that in mind when comparing results.</div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;"><br clear="none"></div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">Hope this helps.</div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;"><br clear="none"></div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">Regards</div><div id="yiv8752248087bloop_customfont" style="font-family:Calibri, Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;">Kwesi</div><div class="yiv8752248087yqt4842173529" id="yiv8752248087yqtfd52397"><p class="yiv8752248087airmail_on">On 17 July 2020 at 18:48:39, Ian Harris (ENV - Staff) via ncl-talk (<a rel="nofollow" shape="rect" ymailto="mailto:ncl-talk@mailman.ucar.edu" target="_blank" href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>) wrote:</p> <blockquote class="yiv8752248087clean_bq" type="cite"><span></span><div dir="ltr"><div></div><div>
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Hi,</div>
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I'd say they want you to examine the resolution of your input and
output data, in case the interpolation could be judged, er,
'optimistic'. For instance, if I had data on a 5° grid, I could
easily interpolate it onto a 0.5° grid, but there are implications
because you're not inventing new data, you're still stuck with the
5° data but on a finer grid.</div>
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Cheers</div>
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<div style="font-family:Calibri, Arial, Helvetica, sans-serif;font-size:12pt;color:rgb(0,0,0);">
Harry<br clear="none"></div>
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<div dir="ltr" id="yiv8752248087divRplyFwdMsg"><font face="Calibri, sans-serif" style="font-size:11pt;" color="#000000"><b>From:</b> ncl-talk
<<a rel="nofollow" shape="rect" ymailto="mailto:ncl-talk-bounces@mailman.ucar.edu" target="_blank" href="mailto:ncl-talk-bounces@mailman.ucar.edu">ncl-talk-bounces@mailman.ucar.edu</a>> on behalf of Ehsan
Taghizadeh via ncl-talk <<a rel="nofollow" shape="rect" ymailto="mailto:ncl-talk@mailman.ucar.edu" target="_blank" href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>><br clear="none">
<b>Sent:</b> 17 July 2020 17:12<br clear="none">
<b>To:</b> Ncl-talk <<a rel="nofollow" shape="rect" ymailto="mailto:ncl-talk@ucar.edu" target="_blank" href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a>><br clear="none">
<b>Subject:</b> [ncl-talk] linint2_point</font>
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<div class="yiv8752248087x_yahoo-style-wrap" style="font-family:bookman old style, new york, times, serif;font-size:16px;">
<div dir="ltr">Dear NCL group,<br clear="none"></div>
<div dir="ltr">I hope you're doing great.</div>
<div dir="ltr">I have a general question and I hope I could have
your help, as usual.</div>
<div dir="ltr">In one paper I wrote "<span><span lang="EN-GB" style="font-size:12.0pt;line-height:200%;font-family:New serif;">The interpolation was done using the bilinear
method in NCL (NCAR Command Language)</span></span>". Actually, I
interpolated some grid precipitation products on gauged stations
using "linint2_points" from NCL.</div>
<div dir="ltr">The referee commented "<span><span style="font-size:8.5pt;line-height:107%;font-family:sans-serif;color:black;">With
how many points? Please discuss also the spatial scale resolution
differences in products and interpolation
implications.</span></span>"</div>
<div dir="ltr">I wanna reply "<span><span style="font-size:11.0pt;line-height:107%;font-family:sans-serif;">As
mentioned in the paper, we used NCL in the most programming. NCL
has a function named linint2_points which interpolates from a
rectilinear grid to an unstructured grid using bilinear
interpolation based on the four closest grid points to a particular
(x, y) coordinate pair.</span></span>" However, I don't know how
reply to the part of discussing about different spatial resolution.
May I ask some help about that, please?</div>
<div dir="ltr"><br clear="none"></div>
<div dir="ltr"><i><font size="2">Sincerely,</font></i></div>
<div dir="ltr"><i><font size="2">Ehsan Taghizadeh</font></i></div>
<div dir="ltr"><i><font size="2">PhD student of
Meteorology,</font></i></div>
<div dir="ltr"><i><font size="2">Institute of Geophysics,
University of Tehran, Iran</font></i></div>
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