Stratospheric ozone depletion was first reported in 1985. Early on, researchers identified polar stratospheric clouds (PSCs) as being important in chemistry related to ozone depletion. PSCs exist as crystalline water-ice particles (type II), and as crystalline (type Ia) or liquid (type Ib) particles stable above the water-ice frost point. Uncertainty remains concerning the composition and formation mechanism of the most common PSC, type Ia. Here, we consider likely formation mechanisms for type Ia PSCs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ar950186k | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The 1831 CE mystery eruption identified as Zavaritskii caldera, Simushir Island (Kurils).
Proc Natl Acad Sci U S A
January 2025
Archaeology & Palaeoecology, School of Natural and Built Environment, Queen's University, Belfast BT9 3AZ, United Kingdom.
Polar ice cores and historical records evidence a large-magnitude volcanic eruption in 1831 CE. This event was estimated to have injected ~13 Tg of sulfur (S) into the stratosphere which produced various atmospheric optical phenomena and led to Northern Hemisphere climate cooling of ~1 °C. The source of this volcanic event remains enigmatic, though one hypothesis has linked it to a modest phreatomagmatic eruption of Ferdinandea in the Strait of Sicily, which may have emitted additional S through magma-crust interactions with evaporite rocks.
View Article and Find Full Text PDFSimultaneous observations of and in Jupiter's northern infrared aurora were conducted on 02 June 2017 using Keck-NIRSPEC to produce polar projection maps of radiance, rotational temperature, column density, and radiance. The temperature variations within the auroral region are K, generally consistent with previous studies, albeit with some structural differences. Known auroral heating sources including particle precipitation, Joule heating, and ion drag have been examined by studying the correlations between each derived quantity, yet no single dominant mechanism can be identified as the main driver for the energetics in Jupiter's northern auroral region.
View Article and Find Full Text PDFThe Hunga Tonga-Hunga Ha'apai volcanic barometric pressure pulse and meteotsunami travel recorded in several Antarctic stations.
An Acad Bras Cienc
November 2024
Rio de Janeiro State University/LARAMG, Pavilhão Haroldo L. Cunha, Subsolo, Rua São Francisco Xavier, 524, Maracanã, 20550-013 Rio de Janeiro, RJ, Brazil.
The Hunga Tonga-Hunga/Hunga-Ha'apai eruption on January 15, 2022 sent off a plume of ash material up to the stratosphere and triggered a meteotsunami and barometric pressure pulse that rippled through the atmosphere and oceans all around the world. The nature of the volcanic event and its global impacts on the oceans, atmosphere, lithosphere and the cryosphere are a matter of debate. Here we present a first overview of the time travel of the sound atmospheric pressure wave through the Antarctic continent based on in situ measurements, which represented a unique event observed through the polar ice sheet during the instrumental meteorological era.
View Article and Find Full Text PDFThe upper tropospheric-lower stratospheric ozone drives summer precipitation and wildfire changes in West Siberia.
Sci Bull (Beijing)
January 2025
Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
Article Synopsis
- Siberian wildfires significantly influence the carbon cycle and Arctic ecosystems, with precipitation trends affecting fire activity over the past decades.
- The study from 1982 to 2021 found a strong connection between summer precipitation in West Siberia and ozone levels in the upper atmosphere, which warms it and alters the polar jet stream's behavior.
- Increases in UTLS ozone correlated with rising summer precipitation, while its decline since 2010 could lead to reduced rainfall and elevated wildfire risk in the region.
Time-varying trends from Arctic ozonesonde time series in the years 1994-2022.
Sci Rep
November 2024
Research and Development, Danish Meteorological Institute, 2100, Copenhagen, Denmark.
Article Synopsis
- Evidence of Antarctic ozone recovery has been observed, but Arctic ozone recovery remains uncertain 25 years after the peak of ozone-depleting substances.
- A Dynamic Linear Model was used to analyze data from ozonesondes over 20-year periods (1994-2022), revealing no detectable recovery in lower Arctic stratospheric ozone.
- Significant positive trends were found before 2017 at some measurement stations, but trends since 2019 have been notably negative, underscoring the need for ongoing monitoring of Arctic ozone levels.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!