Characterization of the source regions of CMEs with polar position angles as seen from Earth

Despite the proliferation of solar and heliospheric observations, many questions regarding the nature and evolution of coronal mass ejections (CMEs) persist. We focus on exploring relationships between the three-dimensional characteristics of CMEs and their source region properties. We analyze the sources of a set of CMEs having polar position angles as seen from Earth, for which their morphological characteristics can be estimated with less uncertainties than typically possible. We rely on observations of different solar atmospheric regimes, provided by the STEREO, SOHO, and SDO missions. In the low corona and chromosphere, we characterize associated filaments and eruptive phenomena; while in the photosphere we investigate polarity inversion lines. The joint analysis of source regions and CMEs enables studying how the attributes of source regions impact the morphological and dynamical characteristics of CMEs, with implications for space weather forecasting and for the understanding of processes involved in the initiation and early evolution of CMEs.