Here are proposed definitions provided by my colleague Ad Stoffelen at KNMI:
------------------------------- divergence_of_surface_downward_stress The divergence is a signed scalar that represents the magnitude of the 2D surface wind downward stress vector field's source (positive) or sink (negative) at a given point. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a downward flux of momentum, which accelerates the lower medium along the vector and the upper medium against the vector. The surface downward stress is the wind stress on the surface. -------------------------------- curl_of_surface_downward_stress The curl is a signed scalar that represents the magnitude of the 2D surface wind downward stress vector field's local anti-clock-wise rotation at a given point; clockwise rotation is thus given as negative curl. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a downward flux of momentum, which accelerates the lower medium along the vector and the upper medium against the vector. The surface downward stress is the wind stress on the surface. Best regards, Bruce ps. We have just changed email systems and it was necessary for me to reregister on the cf-metadata list in order to get my messages accepted. I hope it works now. -B ---------------------------------------------------------------------- Message: 1 Date: Tue, 19 Jan 2016 16:41:17 +0000 From: Jonathan Gregory <[email protected]> To: [email protected] Subject: [CF-metadata] standard_names for wind stress curl, wind stress divergence Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii Dear Bruce > If there are indeed no standard_names that are appropriate, I would like to suggest the following: > divergence_of_surface_downward_stress > curl_of_surface_downward_stress I don't think we have named those before and your proposals look like the natural choice to me. If you could provide definitions (like those most quantities have in the table) and canonical units that will constitute a proposal. People may then comment and when it seems that the discussion is over, if they are agreed, they'll be added to the list. Best wishes and thanks Jonathan -- ------------------------------------------------------------------------ Bruce Hackett Senior Scientist Norwegian Meteorological Institute (MET Norway), R & D Dept. P.O. Box 43 - Blindern e-mail: [email protected] N-0313 Oslo Phone: +47 48 048 958 NORWAY Fax: +47 22 96 33 80 ------------------------------------------------------------------------
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