Mathieu Rouault et al: Top

NCEP Humidity flux
Moisture flux diagrams were constructed from NCEP specific humidity and wind data. They show that about 140 gm/kgs of moisture was advected into the storm region at the 1000 h-Pa level on December 13 and 14. This moisture was advected from above the Agulhas Current by the easterly to northeasterly winds that compose the trailing edge of the anticyclone located in the South West Indian Ocean. Although NCEP specific humidity data shows relatively large amounts of moisture in the tropics, little was advected towards the storm region. The winds in the tropical regions of greatest specific humidity were weak and not consistently in the same direction over a large fetch area as those in the South West Indian Ocean.

NCEP Humidity flux

Moisture flux diagrams were constructed from NCEP specific humidity and wind data. They show that about 140 g*m/kg*s of moisture was advected into the storm region at the 1000 h-Pa level on December 13 and 14. This moisture was advected from above the Agulhas Current by the easterly to northeasterly winds that compose the trailing edge of the anticyclone located in the South West Indian Ocean. Although NCEP specific humidity data shows relatively large amounts of moisture in the tropics, little was advected towards the storm region. The winds in the tropical regions of greatest specific humidity were weak and not consistently in the same direction over a large fetch area as those in the South West Indian Ocean.

Fig. 12: NCEP daily moisture flux values (g*m/kg*s) levels 1000 h-Pa and 850 h-Pa from 13 until the 16 December 1998.

Humidity flux 1| Humidity flux 2| Humidity flux vertical sections| Conclusion| References Thanks]

Email: rouault@physci.uct.ac.za

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