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Geostrophic wind at different latitudes

Hej SMHI,
 "With equal horizontal pressure gradient: geostrophic wind speed will be higher at lower latitude". Why?
Something to do with conservation of angular momentum but can you explain it?

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  • Dear Tim

    Yes, you are on the right track. In the formula of geostrophic wind there is 1/f, where f is the coriolisparameter.

    f= 2*omega*sin(latitude)

    omega is the earths rotation.

    When going south sin(latitude) is increasing and 1/f is decreasing and therefor also the geostrophic wind is decreasing.

    Best regards

    Lennart Wern
    Lennart Klimatolog

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