High ice-nucleating particle concentrations associated with Arctic haze in springtime cold-air outbreaks DOI Creative Commons
Erin N. Raif, Sarah Barr, Mark D. Tarn

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(24), P. 14045 - 14072

Published: Dec. 17, 2024

Abstract. The global variation in ice-nucleating particle (INP) concentrations is an important modulator of the cloud-phase feedback, where albedo mixed-phase clouds increases a warming climate. Shallow clouds, such as those observed cold-air outbreaks (CAOs), are particularly for feedbacks and highly sensitive to INPs. To investigate sources INPs CAOs, we made airborne measurements over Norwegian Barents seas part March 2022 Arctic Cold-Air Outbreak (ACAO) field campaign. Aerosol samples were collected on filters at locations above, below upstream CAO cloud decks. Throughout campaign, INP comparable highest previously Arctic. Scanning electron microscopy analysis taken decks showed that supermicron aerosol was dominated by mineral dusts. Analysis size obtain active site density suggested sea spray unlikely be dominant type. These densities also too great components alone type above −20 °C. Accordingly, it likely dust mixed with other materials, possibly biogenic origin. Back-trajectory meteorological conditions lack local sources. We therefore hypothesise high concentration most associated aged haze has undergone long-range transport from lower-latitude regions.

Language: Английский

Developing a Lagrangian Frame Transformation on Satellite Data to Study Cloud Microphysical Transitions in Arctic Marine Cold Air Outbreaks DOI Creative Commons
Hannah Seppala, Zhibo Zhang, Xue Zheng

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(9)

Published: May 8, 2025

Abstract Arctic marine cold air outbreaks (CAOs) generate distinct and dynamic cloud regimes due to intense air‐sea interactions. To understand the temporal evolution of CAO properties compare different events, a Lagrangian perspective is particularly useful. We developed novel technique that enables conversion inherently Eulerian satellite data into framework, combining broad spatiotemporal coverage observations with advantages tracking. This was applied eight cases associated recent field campaign. Our results reveal striking contrast among in terms cloud‐top phase transitions, providing new insights properties.

Language: Английский

Citations

0
High ice-nucleating particle concentrations associated with Arctic haze in springtime cold-air outbreaks DOI Creative Commons
Erin N. Raif, Sarah Barr, Mark D. Tarn

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(24), P. 14045 - 14072

Published: Dec. 17, 2024

Abstract. The global variation in ice-nucleating particle (INP) concentrations is an important modulator of the cloud-phase feedback, where albedo mixed-phase clouds increases a warming climate. Shallow clouds, such as those observed cold-air outbreaks (CAOs), are particularly for feedbacks and highly sensitive to INPs. To investigate sources INPs CAOs, we made airborne measurements over Norwegian Barents seas part March 2022 Arctic Cold-Air Outbreak (ACAO) field campaign. Aerosol samples were collected on filters at locations above, below upstream CAO cloud decks. Throughout campaign, INP comparable highest previously Arctic. Scanning electron microscopy analysis taken decks showed that supermicron aerosol was dominated by mineral dusts. Analysis size obtain active site density suggested sea spray unlikely be dominant type. These densities also too great components alone type above −20 °C. Accordingly, it likely dust mixed with other materials, possibly biogenic origin. Back-trajectory meteorological conditions lack local sources. We therefore hypothesise high concentration most associated aged haze has undergone long-range transport from lower-latitude regions.

Language: Английский

Citations

2