Typical Appearance In Vertical Cross Sections
Here are some relevant features from the NWP parameters that describe the vertical structure of the SACZ events:
- Vertical velocity (omega): upward motion helps sustain the convective processes along the cloud band.
- Specific humidiy: humidity in the troposphere supplies the convective processes with energy.
VCS Over Land
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Figure 1: Location of the cross section over land.
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Maximum values of humidity have a horizontal extent between 1500-2000 km, reaching maximum size on the third and fourth days. Vertical velocity values peak on the first three days. From the fifth day on, both humidity and velocity maxima have shifted north. On 29-30 March 2009 both values decrease.
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Figure 1a: VCS humidity (g/kg) 24 Mar 2009 - 18:00 UTC.
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Figure 2a: Vertical velocity (Pa/s) 24 Mar 2009 - 18:00 UTC.
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Figure 3a: VCS humidity (g/kg) 25 Mar 2009 - 18:00 UTC.
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Figure 4a: Vertical velocity (Pa/s) 25 Mar 2009 - 18:00 UTC.
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Figure 5a: VCS humidity (g/kg) 26 Mar 2009 - 18:00 UTC.
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Figure 6a: Vertical velocity (Pa/s) 26 Mar 2009 - 18:00 UTC.
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Figure 7a: VCS humidity (g/kg) 27 Mar 2009 - 18:00 UTC.
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Figure 8a: Vertical velocity (Pa/s) 27 Mar 2009 - 18:00 UTC.
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Figure 9a: VCS humidity (g/kg) 28 Mar 2009 - 18:00 UTC.
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Figure 10a: Vertical velocity (Pa/s) 28 Mar 2009 - 18:00 UTC.
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Figure 11a: VCS humidity (g/kg) 29 Mar 2009 - 18:00 UTC.
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Figure 12a: Vertical velocity (Pa/s) 29 Mar 2009 - 18:00 UTC.
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Figure 13a: VCS humidity (g/kg) 30 Mar 2009 - 18:00 UTC.
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Figure 14a: Vertical velocity (Pa/s) 30 Mar 2009 - 18:00 UTC.
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VCS Over Ocean
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Figure 1: Location of the cross section over sea.
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Figure 1b: VCS humidity (g/kg) 24 Mar 2009 – 18:00 UTC.
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Figure 2b: Vertical velocity (Pa/s) 24 Mar 2009 - 18:00 UTC.
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Figure 3b: VCS humidity (g/kg) 25 Mar 2009 - 18:00 UTC.
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Figure 4b: Vertical velocity (Pa/s) 25 Mar 2009 - 18:00 UTC.
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Figure 5b: VCS humidity (g/kg) 26 Mar 2009 - 18:00 UTC.
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Figure 6b: Vertical velocity (Pa/s) 26 Mar 2009 - 18:00 UTC.
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Figure 7b: VCS humidity (g/kg) 27 Mar 2009 - 18:00 UTC.
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Figure 8b: Vertical velocity (Pa/s) 27 Mar 2009 - 18:00 UTC.
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Figure 9b: VCS humidity (g/kg) 28 Mar 2009 - 18:00 UTC.
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Figure 10b: Vertical velocity (Pa/s) 28 Mar 2009 - 18:00 UTC.
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Figure 11b: VCS humidity (g/kg) 29 Mar 2009 - 18:00 UTC.
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Figure 12b: Vertical velocity (Pa/s) 29 Mar 2009 - 18:00 UTC.
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Figure 13b: VCS humidity (g/kg) 30 Mar 2009 - 18:00 UTC.
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Figure 14b: Vertical velocity (Pa/s) 30 Mar 2009 - 18:00 UTC.
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