How well does ERA5 simulate the timing of Antarctic precipitation: A comparison with present and past weather reports ...

• Main Authors: Marshall, Gareth, Clelland, Andrew
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; The Antarctic; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.57757/iugg23-0688; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016800

<!--!introduction!--> Reanalyses are especially useful in providing climatic information in remote and inhospitable regions, such as the Antarctic continent. While there are relatively few direct measurements from Antarctica to assess the accuracy of reanalyses in simulating precipitation at sub-daily frequencies, present and past weather reports from meteorological stations allow a quantitative assessment of the skill of reanalyses in getting the correct timing of precipitation. This is an important consideration when it comes to utilising reanalyses to examine extreme precipitation events or in interpreting climate signals in ice cores. Here, we use a forecast verification methodology based on non-probabilistic forecasts of discrete predictands – that is, simply, there is precipitation or there isn’t - to examine the capability of ERA5 to correctly reproduce the timing of Antarctic precipitation at a 6-hourly temporal resolution. The assessment is undertaken by comparing reanalysis output to 20-years ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...