Whitepaper #434 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: inner heliosphere; solar physics.
This white paper brings to light the need for comprehensive studies on the evolution of interplanetary coronal mass ejection (ICME) complexity during propagation. To date, few studies of ICME complexity exist. In this white paper, we define ICME complexity and accompanying changes in complexity, describe recent works and their limitations, and outline key science questions that need to be tackled.