B1928
Title: Advanced statistical tools to compare HYSPLIT air parcel trajectories in the Artic and Antarctic regions
Authors: Ana Justel - Universidad Autonoma de Madrid (Spain) [presenting]
Marcela Svarc - Universidad de San Andres (Argentina)
Gonzalo Liniers - Universidad Autonoma de Madrid (Spain)
Pablo Sanz - Universidad Autonoma de Madrid (Spain)
Sergi Gonzalez - WSL Institute for Snow and Avalanche Research SLF (Switzerland)
Abstract: Trajectory data sets that describe the movement of air masses to or from a location appear in problems of great scientific and social interest. This is the case of forest fires or nuclear accidents. Different methods are explored to study the compatibility between trajectories that describe the movement of the same air parcel, both generated with the HYSPLIT model (NOAA) but using the different input meteorological data provided by the ERA5 (ECMWF) and GDAS (NOAA) reanalysis models. Considering that the case-by-case comparison is of no interest, the approach that has been followed focuses on studying whether the analysis of two sets of trajectories provides similar conclusions, in this case in terms of the identified clusters. The particularity of these functional data, moving in 3D space over time, means that many of the FDA methods are not directly applicable. Several approaches are proposed that make different use of the information and use them to compare the ERA5 and GDAS trajectories associated with the air samples collected on two polar expeditions, with the purpose of understanding the origin and distribution of microorganisms in the polar regions. A computer tool has been developed to visualize and analyze this complex data, with a friendly interface that makes it easy for any non-expert user.
