Amazing drop in Tropopause off CA Coast
Posted by JAC on 2/10/2010, 7:09 am


A strong potential vorticity (PV) anomaly was propagating southeastward just off the California coast on 09 February 2010 - and this feature had a striking presentation on AWIPS images of GOES-11 water vapor channel data (above), with a pronounced arc of very dry air (yellow color enhancement) seen around the periphery of the circulation.

According to the CRAS model fields, the tropopause (taken to be the pressure of the PV1.5 surface) was being brought downward as low as the 600 hPa pressure level within the core of the PV anomaly.

Images of the GOES-11 sounder Total Column Ozone derived product (below) depicted ozone values as high as 430 Dobson Units (red color enhancement) in the vicinity of the PV anomaly, supporting the idea that the tropopause height was very depressed within the circulation feature.






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Amazing drop in Tropopause off CA Coast - JAC, 2/10/2010, 7:09 am
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