PERSONAL DE APOYO
DEFERRARI guillermo Alejandro
artículos
Título:
The September 2002 Antarctic vortex major warming as observed visible spectroscopy and ozonesounding
Autor/es:
YELA MARGARITA; PARRONDO C; GIL M; RODRIQUEZ S; ARAUJO J; OCHOA H; DEFERRARI GUILLERMO; DIAZ SUSANA
Revista:
INTERNATIONAL JOURNAL OF REMOTE SENSING
Referencias:
Año: 2005 vol. 26 p. 3361 - 3376
ISSN:
0143-1161
Resumen:
The record of O3 total column and NO2 obtained by visible spectroscopy at
Ushuaia (55u S), Marambio (64u S) and Belgrano (78u S) and vertical ozone
profiles from the latter station provide insight into the unprecedented major
warming observed above Antarctica in the last week of September 2002. From 18
September to 25 September the temperature increased 54uC at the isentropic level
of 700 K. The temperature anomaly was observed down to the level of 300K in
which a well-defined tropopause was established. From comparison of the ozone
profiles before and during the event, it can be seen that a fast increase in O3 took
place basically above 500 K, but the layer where the ozone hole occurs was barely
affected. Low potential vorticity values above Belgrano occurred only at levels
above 500 K, confirming that the vortex split was confined to heights above the
layer of the Antarctic spring depletion. The signature of poleward-transported air
is clearly visible from the NO2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.3 total column and NO2 obtained by visible spectroscopy at
Ushuaia (55u S), Marambio (64u S) and Belgrano (78u S) and vertical ozone
profiles from the latter station provide insight into the unprecedented major
warming observed above Antarctica in the last week of September 2002. From 18
September to 25 September the temperature increased 54uC at the isentropic level
of 700 K. The temperature anomaly was observed down to the level of 300K in
which a well-defined tropopause was established. From comparison of the ozone
profiles before and during the event, it can be seen that a fast increase in O3 took
place basically above 500 K, but the layer where the ozone hole occurs was barely
affected. Low potential vorticity values above Belgrano occurred only at levels
above 500 K, confirming that the vortex split was confined to heights above the
layer of the Antarctic spring depletion. The signature of poleward-transported air
is clearly visible from the NO2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.u S), Marambio (64u S) and Belgrano (78u S) and vertical ozone
profiles from the latter station provide insight into the unprecedented major
warming observed above Antarctica in the last week of September 2002. From 18
September to 25 September the temperature increased 54uC at the isentropic level
of 700 K. The temperature anomaly was observed down to the level of 300K in
which a well-defined tropopause was established. From comparison of the ozone
profiles before and during the event, it can be seen that a fast increase in O3 took
place basically above 500 K, but the layer where the ozone hole occurs was barely
affected. Low potential vorticity values above Belgrano occurred only at levels
above 500 K, confirming that the vortex split was confined to heights above the
layer of the Antarctic spring depletion. The signature of poleward-transported air
is clearly visible from the NO2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.uC at the isentropic level
of 700 K. The temperature anomaly was observed down to the level of 300K in
which a well-defined tropopause was established. From comparison of the ozone
profiles before and during the event, it can be seen that a fast increase in O3 took
place basically above 500 K, but the layer where the ozone hole occurs was barely
affected. Low potential vorticity values above Belgrano occurred only at levels
above 500 K, confirming that the vortex split was confined to heights above the
layer of the Antarctic spring depletion. The signature of poleward-transported air
is clearly visible from the NO2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.3 took
place basically above 500 K, but the layer where the ozone hole occurs was barely
affected. Low potential vorticity values above Belgrano occurred only at levels
above 500 K, confirming that the vortex split was confined to heights above the
layer of the Antarctic spring depletion. The signature of poleward-transported air
is clearly visible from the NO2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.2 column departure from the envelope of the
previous years in all three stations. NO2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.2 columns larger than typical for ozone
hole conditions by 400% were observed at Belgrano. Diurnal variations provide
evidence of non-denitrified extra-vortex air.