Thread by @simoncarn

The first #stratospheric #volcanic #eruption of 2022, at #HungaTongaHungaHaapai (#Tonga) on Jan 13-14. #Sentinel5P #TROPOMI & @NASA's Aura/OMI both measure ~0.05 Tg SO₂ in the #volcanic cloud - not enough for #climate impacts. @CopernicusEU @NASAEarth @volcanessa @MetService

Another spectacular #eruption of Hunga #Tonga-Hunga Ha'apai at ~04:00 UTC on Jan 15. #Himawari8 data via @CIRA_CSU.

First look at SO₂ in the Jan 15 #eruption cloud measured by @eumetsat MetOp/GOME-2. So far, the SO₂ columns do not appear to be extreme; generally <20 Dobson Units (DU). For a Pinatubo-scale event we'd expect SO₂ columns >100 DU. More data soon.
Source: sacs.aeronomie.be/nrt

The westward transport of the SO₂ cloud from #Tonga confirms that most of the gas is in the stratosphere, where the winds are easterly. Need to wait for #Sentinel5P #TROPOMI, @JPSSProgram OMPS or @NASA Aura/OMI data to estimate SO₂ mass.

Here are the latest #Sentinel5P #TROPOMI SO₂ data covering most of the #HungaTongaHungaHaapai #eruption cloud (just the western edge is missing). The total SO₂ mass is ~0.4 Tg. @CopernicusEU @DlrSo2 @BIRA_IASB @ESA_EO @esa