The mountain's toponym honours mountaineer Rose (Rosa) Moorhouse (1866–1932).[3] The peak was named by Rosa Moorhouse and her cousin Mabel Studholme following their ascent of the peak in 1890. From the summit they also named nearby Mount Mabel (2,091m). Rose Moorhouse was from a well-connected family and was also the niece of William Sefton Moorhouse, after whom nearby Mount Sefton is named. In 1892, Rose married Arthur Rhodes, New Zealand member of parliament and mayor of Christchurch. Rosa's charm and style cemented their place in Christchurch social circles and considerably assisted Arthur's political career. After Arthur's death, she lived with her son in London and died by falling 18 metres from the window of her son's flat.[4]
Climate
Based on the Köppen climate classification, Mount Rosa is located in a marine west coast (Cfb) climate zone, with a subpolar oceanic climate (Cfc) at the summit.[5] Prevailing westerly winds blow moist air from the Tasman Sea onto the mountains, where the air is forced upward by the mountains (orographic lift), causing moisture to drop in the form of rain or snow. This climate supports an unnamed glacieret on the northeast slope of the peak. The months of December through February offer the most favourable weather for viewing or climbing this peak.[6]
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