June 2006 at Lerwick

This event was part of a 10-day low ozone anomaly that started over the Eastern North Atlantic. It was then blocked and quasi-stationary for nearly a week near Lerwick. This episode was associated with a tropospheric anticyclone advecting warm air from the south and lifting the tropopause thus reducing the ozone column locally.

Figure A shows the anomaly and spatial extent of this event as seen by the satellite OMI.

Figure A

Figure A: The anomaly of ozone expressed as a percentage of the long term mean for the 15th of June

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This event was part of a 10-day low ozone anomaly that started over the Eastern North Atlantic. It was then blocked and quasi-stationary for nearly a week near Lerwick. This episode was associated with a tropospheric anticyclone advecting warm air from the south and lifting the tropopause thus reducing the ozone column locally.

Figure A shows the anomaly and spatial extent of this event as seen by the satellite OMI.

Figure A

Figure A: The anomaly of ozone expressed as a percentage of the long term mean for the 15th of June