Revision of winds variables

[JohnEyre]

Proposal Summary

The wind variables in WMDR - 12005, 12006, 310, 307 - are inconsistent and incomplete. They should be revised to include:

• wind specified in speed and direction or in components,
• wind at a single level or a vector of levels,
• wind at specified heights or pressures, or at specified distances from reference levels,
• more complete definition of wind direction - an angle measured clockwise from North.

Summary and Purpose

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Proposal

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Reason

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Stakeholder(s)

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Consultations

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Context

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Expected Impact of Change

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[amilan17]

duplicate issue with #417

[gaochen-larc]

I think we need five basic variables: wind direction, wind speed, u, v, and w. The vertical profile of wind can be described using attributes in the upcoming WMDR 2.0. The existing codes, i.e., 12005, 12006, 310, and 307, look confusing to me. Would like to see if and how they have been used. However, it would be rather difficult to update the description with additional information. Looking for comments and suggestions!

[gaochen-larc]

Wind Speed: Ratio of the distance covered by the air to the time taken to cover it. This scalar quantity can be used to represent a value at given location and time or average over spatio-temporal extent or values as a function spatio-temporal coordinates

Wind Direction: the direction expressed in degrees at which the wind originates, i.e., 0° for north or northerly wind, 90° for east or easterly wind, 180° (or -180°) degree for south or southerly wind, and 270° (or -90°) for west or westerly wind. This scalar quantity can be used to represent a value at given location and time or average over spatio-temporal extent or values as a function spatio-temporal coordinates

u: east-west component of the horizontal wind vector, positive value for eastward wind or west wind. This scalar quantity can be used to represent a value at given location and time or average over spatio-temporal extent or values as a function spatio-temporal coordinates

v: north-south component of the horizontal wind vector, positive value for northward wind or south wind . This scalar quantity can be used to represent a value at given location and time or average over spatio-temporal extent or values as a function spatio-temporal coordinates.

w: vertical component of the 3-D wind vector. positive value for upward wind, This scalar quantity can be used to represent a value at given location and time or average over spatio-temporal extent or values as a function spatio-temporal coordinates.

Looking comments and suggestions!