Any process that activates or increases the frequency, rate or extent of microtubule depolymerization.
Synonyms:
exact_synonym:
microtubule destabilization; positive regulation of microtubule disassembly; up regulation of microtubule depolymerization; upregulation of microtubule depolymerization
narrow_synonym:
activation of microtubule depolymerization; positive regulation of microtubule catastrophe; stimulation of microtubule depolymerization