Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Two-year (1996/1997) ozone DIAL measurement over Dumont d’Urville (Antarctica).
AU - Santecesario, V.
AU - Stefanutti, L.
AU - Morandi, M.
AU - Guzzi, D.
AU - Mackenzie, A. Robert
PY - 1999
Y1 - 1999
N2 - Two years of ozone measurements (1996, 1997), sorted according to the analysed potential vorticity over Dumont d’Urville (66 °S), are presented. Subsidence in the vortex was observed by tracing the descent of the ozone maximum. Chemical depletion was also observed. In springtime, the ozone mixing ratio was reduced by a factor 10 on isentropes between about 400 K and 475 K. Using the observations of descent and depletion, it is shown that, at the latitude of Dumont d’Urville, chemical depletion starts close to mid-winter. Depletion starts earlier at higher altitudes (above 450 K) than at lower altitudes (below 450 K). The earlier presence of Polar Stratospheric Clouds (PSCs) at higher altitudes than at lower altitudes is a likely reason. The mid-winter maximum in Antarctic total ozone columns [Roscoe et al., 1997] is then due to the integrated effect of these phase-shifted maxima on the various isentropic surfaces
AB - Two years of ozone measurements (1996, 1997), sorted according to the analysed potential vorticity over Dumont d’Urville (66 °S), are presented. Subsidence in the vortex was observed by tracing the descent of the ozone maximum. Chemical depletion was also observed. In springtime, the ozone mixing ratio was reduced by a factor 10 on isentropes between about 400 K and 475 K. Using the observations of descent and depletion, it is shown that, at the latitude of Dumont d’Urville, chemical depletion starts close to mid-winter. Depletion starts earlier at higher altitudes (above 450 K) than at lower altitudes (below 450 K). The earlier presence of Polar Stratospheric Clouds (PSCs) at higher altitudes than at lower altitudes is a likely reason. The mid-winter maximum in Antarctic total ozone columns [Roscoe et al., 1997] is then due to the integrated effect of these phase-shifted maxima on the various isentropic surfaces
M3 - Journal article
VL - 26
SP - 463
EP - 466
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 4
ER -