While there were plenty of the usual fairly straight-looking aerosol trails seen today, from south -north over Whangarei and in the west on the horizon, there was this anomaly. Thank-you to Jacqui who took these photos from Whangarei today from about 2.15pm. She was driving on Pipiwai Rd, Kamo and saw a plane ascending, spraying an aerosol trail, when it then appeared to start descending. It flew in a curve, as you can see in the last photo.
This trail was reported by the NZHerald, which claimed wrongly that it was a vapour trail. Someone commented on the Herald’s Facebook page that it was left by an Air Force C17 Globemaster: https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=12220762&utm_source=facebook&utm_medium=social&utm_campaign=nzh_fb&fbclid=IwAR1mrErWxEQu553SbXBEL1muKQ0x4wF_tZpeghI6SbInq4o0l4EEXt2Ql-g