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</style><div class="default-font-1713959350356" dir="ltr"><p><span style="font-family:Times New Roman;"><span style="font-family:"Times New Roman";font-size:14pt;">Dear Sir/Madam,</span></span></p><p><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><br></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;">My name is Mingshun Fan, and I am a
doctoral student from Zhejiang University, China. I am reaching out to you via
email to inquire about a question regarding the wind stress data of ECCOv4r3.</span><span style="font-family:"Times New Roman";font-size:14pt;"><o:p></o:p></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><br></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;">I have processed the zonal wind stress data,
which is available every 6 hours, into monthly averaged data (shown on the
right side of the attached figure) from the directory
ECCO/ECCOv4/Release3/input_forcing/. I intend to compare it with the
pre-existing monthly averaged zonal wind stress data (shown on the left side of
the attached figure) from the directory
ECCO/ECCOv4/Release3/nctiles_monthly/oceTAUE/. However, I noticed that there is
a difference of a positive/negative sign between the two datasets. Based on my
existing knowledge of oceanography, the zonal wind stress in this region should
be positive (eastward). Could you please help me understand why the sign in the
right figure is opposite? I believe this might be a minor issue, but I am
struggling to identify the reason. Therefore, I am reaching out to seek your
advice.</span><span style="font-family:"Times New Roman";font-size:14pt;"><o:p></o:p></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><br></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;">Thank you very much.  I am looking forward to your reply.</span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><br></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><img src="cid:2968c277$1$18f0ff04b84$Coremail$12234017$zju.edu.cn" alt="" width="821.938" height="268.35"></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;"><br></span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;">Best,</span></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;font-size:10.5pt;font-family:等线;"><span style="font-size:14pt;"><span style="font-family:"Times New Roman";font-size:14pt;">Mingshun Fan<br></span></span></p><p><br></p></div>