Millán L, Santee M L, Lambert A, Livesey N J, Werner F, Schwartz M J, Pumphrey H C, Manney G L, Wang Y, Su H, Wu L, Read W G, Froidevaux L
Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA.
School of GeoSciences The University of Edinburgh Edinburgh UK.
Geophys Res Lett. 2022 Jul 16;49(13):e2022GL099381. doi: 10.1029/2022GL099381. Epub 2022 Jul 1.
Following the 15 January 2022 Hunga Tonga-Hunga Ha'apai eruption, several trace gases measured by the Aura Microwave Limb Sounder (MLS) displayed anomalous stratospheric values. Trajectories and radiance simulations confirm that the HO, SO, and HCl enhancements were injected by the eruption. In comparison with those from previous eruptions, the SO and HCl mass injections were unexceptional, although they reached higher altitudes. In contrast, the HO injection was unprecedented in both magnitude (far exceeding any previous values in the 17-year MLS record) and altitude (penetrating into the mesosphere). We estimate the mass of HO injected into the stratosphere to be 146 ± 5 Tg, or ∼10% of the stratospheric burden. It may take several years for the HO plume to dissipate. This eruption could impact climate not through surface cooling due to sulfate aerosols, but rather through surface warming due to the radiative forcing from the excess stratospheric HO.
2022年1月15日汤加洪阿哈阿帕伊岛火山喷发后，奥拉卫星微波临边探测仪（MLS）测量的几种痕量气体在平流层呈现出异常值。轨迹和辐射模拟证实，火山喷发注入了羟基（HO）、二氧化硫（SO）和氯化氢（HCl）。与之前火山喷发相比，SO和HCl的质量注入量并无异常，尽管它们到达了更高的高度。相比之下，HO的注入在量级（远远超过MLS记录17年中的任何先前值）和高度（穿透到中间层）上都是前所未有的。我们估计注入平流层的HO质量为146±5太克，约占平流层总量的10%。HO羽流可能需要数年时间才能消散。这次火山喷发对气候的影响可能不是通过硫酸盐气溶胶导致的地表冷却，而是通过平流层中过量HO的辐射强迫导致的地表变暖。
Zotero 插件
