Reference:suricat
"T h i s d o e s n ’ t m e n t i o n a n y U V e f f e c t , b u t I s t i l l m a i n t a i n t h a t U V i s a p o t e n t m e d i a t o r o f ‘ g l a c i a l s l i p p a g e ’ f o r g l a c i e r s w i t h l i t t l e d e b r i s c o n t e n t a n d i s a l s o a w a r m i n g f a c t o r f o r g l a c i e r s w i t h a l o t o f d e b r i s c o n t e n t . T h o u g h t h e c u r r e n t l o w s u n s p o t m a n i f e s t a t i o n i s a n e g a t i v e f o r g l a c i a l s l i p p a g e ( e t c . ) A n d a p o s i t i v e t o w a r d s U V ’ s e f f e c t i n t h i s a r e a ( d u e t o l o w U V a n d l o w ‘ g l a c i a l s l i p p a g e ’ / ’ i c e m e l t ’ ) .
As You know for C4, I concur, fully 
How long before the science catches up?