An extreme precipitation event over Dronning Maud Land, East Antarctica - Atmospheric river case study using the Polar WRF Model ...

• Main Authors: Simon, Sibin, Turner, John, Deb, Pranab, Lazzara, Matthew, Meloth, Thamban
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; The Antarctic; East Antarctica; Dronning Maud Land; Antarc*; Antarctica; DML; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.57757/iugg23-1055; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018201

<!--!introduction!--> We investigated a heavy snowfall event in Dronning Maud Land (DML), East Antarctica, on November 8th and 9th, 2015, which contributed to 20% of the total annual accumulation. The anomalous moisture transport during the event was due to a strong atmospheric river, a long, narrow band of high moisture that travelled poleward from 30-40S in the South Atlantic Ocean. The synoptic scale pattern consisted of an anomalous blocking ridge extending to the Antarctic continent and a deep cyclonic system that intruded into the area. The main moisture source was in an area of anomalous evaporation in the South Atlantic Ocean 4-5 days prior to the event. The eastward movement of this anomaly and the strengthening of the low-pressure system in the Atlantic Ocean favoured a band of high moisture transport towards DML. A regional atmospheric model optimized for the polar regions (Polar WRF) was used to examine the relationship between the complex coastal topography of DML and the spatial ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...