Both I2a1 and E1b-V13 could be classified as Mediterranean. Another Alpine group introduced on a different timescale and along a southeast to west-central trajectory is G2. The above maps suggest that R1b may have a specific Nordic subgroup of its own and R1a an Alpine subgroup. Interestingly, if we consider the general lack of I2a2 in the Greek Alps, the Greek Alpine haplogroup may well be R1a. Subsequently, R1a may have a small but significant early-European component.
The map appears to infer that Alpine R1b-U152 is part of the diffusion of the Continental Nordic/Teutonic group into south-central Europe.
G2a also seemed Alpine to me at first sight because it peaks in the Caucasus, Anatolia and the Alps, all Alpine regions. However it is also extremely high in in Sardinia and quite high all over Italy, Southern France and Iberia, which are all phenotypically Mediterranean. So G2a can be either Alpine or Mediterranean.
R1b-U152 is even more complex since its is found at high frequency in Italy (Mediterranean), around the Alps (Apline) and further north into Nordic territory (Germany, Belgium).