Polar stratospheric clouds over McMurdo, Antarctica, during the 1991 spring: Lidar and particle counter measurements

Journal Article · Fri Sep 04 04:00:00 EDT 1992 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/92GL01941· OSTI ID:5150533

Adriani, A; Gobbi, G P ^[1]; Deshler, T; Johnson, B J ^[2]; Donfrancesco, G Di ^[3]

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1. Instituto di Fisica dell'Atmosfera, Frascati (Italy)
2. Univ. of Wyoming, Laramie, WY (United States)
3. ENEA, Rome (Italy)

Lidar and balloonborne particle counter measurements were performed simultaneously on two days when polar stratospheric clouds were observed in late August 1991 at McMurdo, Antarctica. Both nitric acid trihydrate and ice clouds were observed in the lower stratosphere between 10 and 23 km in different formation stages and with different cooling rate; however in all cases the size distributions were bimodal. Comparison of scattering ratios measured by lidar and calculated from particle size distributions are in good agreement; however, discrepancies were observed when the lower stratosphere was highly perturbed by wave activity. Lee waves generated by air flowing over the Trans Antarctic Mountains induced ice cloud formation at altitudes as high as 20 km. No PSCs were observed after the end of August in 1991.

• OSTI ID: 5150533
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 19:17; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
CLOUDS
CRYOSPHERE
EARTH ATMOSPHERE
HYDRATES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NITRIC ACID
POLAR REGIONS
STRATOSPHERE
SYNTHESIS