Stratospheric Chlorine Processing After the Unprecedented Hunga Tonga Eruption

Stratospheric Chlorine Processing After the Unprecedented Hunga Tonga Eruption Zhang, Jun; Wang, Peidong; Kinnison, Douglas; Solomon, Susan; Guan, Jian; Stone, Kane; Zhu, Yunqian Following the Hunga Tonga–Hunga Ha'apai (HTHH) eruption in January 2022, significant reductions in stratospheric hydrochloric acid (HCl) were observed in the Southern Hemisphere mid‐latitudes during the latter half of 2022, suggesting potential chlorine activation. The objective of this study is to comprehensively under