<div dir="ltr">Thomas,<div><br></div><div>This is not an NCL issue, this is a science issue. The functions are well-documented, as you most definitely seem to understand what each function is calculating.</div><div><br></div><div>Only YOU can say whether your calculation should include or exclude the boundary levels - generally I would include them, but it depends on the science you want to do.</div><div><br></div><div>If you can calculate the moisture flux itself (a simple calculation), I would vertically integrate that and then calculate the divergence of the resulting field as this will be more efficient. However, I'm not sure if it would yield the same result as calculating the moisture flux divergence and then doing the vertical integral - you can certainly try both methods and be aware the second method will take longer to calculate.</div><div><br></div><div>Don't forget to look at the code that Dennis sent you in a previous email as well - some or all of it might help outline what you want to do.</div><div><br></div><div>Hope this helps. If not, consult the mathematical equations for this field and respond back to ncl-talk if you have issues implementing the calculations within your NCL scripts.</div><div><br></div><div><br></div><div>Kyle</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr">----------------------------------------<div>Kyle S. Griffin</div><div>Department of Atmospheric and Oceanic Sciences</div><div>University of Wisconsin - Madison</div><div>Room 1421</div><div>1225 W Dayton St, Madison, WI 53706</div><div>Email: <a href="mailto:ksgriffin2@wisc.edu" target="_blank">ksgriffin2@wisc.edu</a></div></div></div></div>
<br><div class="gmail_quote">On Thu, Dec 25, 2014 at 9:57 PM, tms_l <span dir="ltr"><<a href="mailto:littithomas@gmail.com" target="_blank">littithomas@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-size:13px">hi ncl users</div><div style="font-size:13px"><br></div><div style="font-size:13px">I have to calculate the moisture flux convergence between pressure levels 850hpa AND 200hpa pressure levels..and I THINK i need to consider the specific humidity at 850 & 200 hpa pressure levels too ...finally integrating between the two pressure levels to get the moisture flux convergence...</div><div style="font-size:13px"><br></div><div style="font-size:13px">I already calculated the wind divergence at two pressure levels using the function, uv2dvG_Wrap..I am not clear about the next step..</div><div style="font-size:13px"><br></div><div style="font-size:13px">can anyone describe it little more..which functions i need to select for calculating the moisture flux convergence..</div><div style="font-size:13px"><br></div><div> thanks in advance</div><div><br></div><div>thomas</div></div>
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