Radar and ground-level measurements of precipitation collected by the École Polytechnique Fédérale de Lausanne during the International Collaborative Experiments for PyeongChang 2018 Olympic and Paralympic winter games

Abstract

Abstract. This article describes a 4-month dataset of precipitation and cloud measurements collected during the International Collaborative Experiments for PyeongChang 2018 Olympic and Paralympic winter games (ICE-POP 2018). This paper aims to describe the data collected by the Environmental Remote Sensing Laboratory of the École Polytechnique Fédérale de Lausanne. The dataset includes observations from an X-band dual-polarisation Doppler radar, a W-band Doppler cloud profiler, a multi-angle snowflake camera and a two-dimensional video disdrometer (https://doi.org/10.1594/PANGAEA.918315, Gehring et al., 2020a). Classifications of hydrometeor types derived from dual-polarisation measurements and snowflake photographs are presented. The dataset covers the period from 15 November 2017 to 18 March 2018 and features nine precipitation events with a total accumulation of 195 mm of equivalent liquid precipitation. This represents 85 % of the climatological accumulation over this period. To illustrate the available data, measurements corresponding to the four precipitation events with the largest accumulation are presented. The synoptic situations of these events were contrasted and influenced the precipitation type and accumulation. The hydrometeor classifications reveal that aggregate snowflakes were dominant and that some events featured significant riming. The combination of dual-polarisation variables and high-resolution Doppler spectra with ground-level snowflake images makes this dataset particularly suited to study snowfall microphysics in a region where such measurements were not available before.

Impact of wind pattern and complex topography on snow microphysics during International Collaborative Experiment for PyeongChang 2018 Olympic and Paralympic winter games (ICE-POP 2018)

“…A field campaign named ICE-POP 2018 (International Collaborative Experiment for PyeongChang 2018 Olympic and Paralympic winter games) took place in the Gangwon region to address this issue (Gehring et al, 2020(Gehring et al, , 2021Lim et al, 2020;Jeoung et al, 2020). The ICE-POP 2018, contributed to by 29 agencies from 12 countries, was a World Weather Research Programme (WWRP) of the World Meteorological Organization (WMO) and was led by the Korea Meteorological Administration (KMA).…”

Identification of snowfall microphysical processes from Eulerian vertical gradients of polarimetric radar variables

“…The APRES3 campaign was heavily instrumented during austral summer 2015-2016 (Grazioli et al, 2017a;Genthon et al, 2018). Of particular relevance for our work is that an X-band dual-polarization Doppler radar (mobile X-band polarimetric weather radar -MXPOL; Schneebeli et al, 2013;Scipión et al, 2013) was deployed.…”

“…A preliminary processing step, following Schaer et al (2020), removes blowing snow particles from the data set. A pluviometer was also continuously measuring the precipitation rate during the event (Grazioli et al, 2017a;Genthon et al, 2018).…”

Simulated microphysical properties of winter storms from bulk-type microphysics schemes and their evaluation in the WRF (v4.1.3) model during the ICE-POP 2018 field campaign

“…Furthermore, numerical weather prediction using various high-resolution models around the world was conducted to support weather forecasts during the Olympic winter games as part of the Forecast Demonstration Project efforts of World Weather Research Program in World Meteorological Organization. The analysis of collected observed data and highresolution modeling information during ICE-POP 2018 can improve our understanding of the snowfall formation mechanism and related cloud microphysics processes over the complex terrain along the mountainous region over Korea (Kim et al, 2021a;Gehring et al, 2020b;Gehring et al, 2021;Lim et al, 2020;Jeoung et al, 2020).…”