Dutch to English Science Meteorology calculating ambient air quality

In a text about a tool for calculating ambient air quality, the following:

"De ruimtelijke ontbinding van emissiedata gebeurt binnen E-MAP met behulp van zogenaamde substituut- of surrogaatvariabelen, die gebruikt worden om een statistische gewichtsverdeling toe te kennen aan uitstootgegevens."

My specific query concerns the most appropriate word for "ontbinding" in this context. There are a number of choices and I'm not sure which would be best. The choices seem to be: decomposition; breakdown; decay; disintegration; resolution; expansion;

My initial thoughts turn to "breakdown" and "resolution" but not being expert in this field, I would appreciate further input.