NW Himalaya as a transition zone between the monsoon summer precipitation zone of south Asia and the Mediterranean winter precipitation zone, is very sensitive to displacement of the large-scale atmospheric systems such as ITCZ and those climate forcing which could change position of the ITCZ have significant role in climate variability of NW Himalaya. There are many papers that have investigated Late-glacial and Holocene climate changes of the Asian monsoon domain and almost most of them suggest a wet climate for Late-glacial and early Holocene (~13 - 7 ka B.P.) for NW himalaya because of governing of the intense Indian monson; and an arid climate for late Holocene (from 7000 B.P. onward) because of weakening of the Indian monsoon. During the mid to late Holocene major precipitation source of the NW Himalaya is from mid-latitude systems and since NW Himalaya is located in the interior continental part of the Asia receives a few precipitation from the western depressions. Also, they suggest two main factors are responsible for these climate changes: 1. Solar insolation changes 2. Changes of the Eurasian glacial cover.
I am interested in study of Indian monsoon variability and as far as I have studied relevant papers I have not seen such a long-term research in the NW Himalaya. Therefore, I think by comparing the Holocene climate condition of the NW Himalaya with other long records of the Asian monsoon could achieve to the Pleistocene climate conditions of the NW Himalaya. By the way, if you want I can send to you some papers about climatic changes of the region during the Late-glacial and Holocene.