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Characteristics of precipitation systems associated with synoptic-scale disturbances suggested by Doppler radar observations conducted at Syowa Station

Urheber*innen

Hirasawa,  Naohiko
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Konishi,  Hiroyuki
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Fujiyoshi,  Yasushi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yabuki,  Masataka
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Iwamoto,  Katsushi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Hirasawa, N., Konishi, H., Fujiyoshi, Y., Yabuki, M., Iwamoto, K. (2023): Characteristics of precipitation systems associated with synoptic-scale disturbances suggested by Doppler radar observations conducted at Syowa Station, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4059


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021499
Zusammenfassung
We conducted Doppler radar observations at Syowa Station in 2021-2022. The main objectives are to assess precipitation amount at Syowa Station and to study the precipitation system associated with a synoptic-scale disturbance. The latter half of this observation period coincided with the second SOP of YOPP-SH, during which enhanced radiosonde observations were conducted. In this presentation, we show the characteristic features of precipitation events associated with synoptic-scale disturbances from these observations. And based on this observation, we will discuss the mechanism of the precipitation system in the coastal areas of the Antarctic ice sheet. The most striking feature shown by the Doppler radar is the presence of a strong wind layer that forms below 1000 m altitude. This wind direction is nearly parallel to the continental topography and may have been formed by topographic blocking caused by the Antarctic ice sheet. Previous studies in other regions have suggested that cooling of the lower atmosphere by sublimation of snowfall is responsible for the enhancement of the system, but the effect on this Antarctic system remains to be determined.