The Vertical Structure of Turbulence Kinetic Energy Near the Arctic Sea‐Ice Surface DOI Creative Commons
Shijie Peng, Qinghua Yang, Matthew D. Shupe

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(21)

Published: Nov. 10, 2024

Abstract Atmospheric turbulence over the Arctic sea‐ice surface has been understudied due to lack of observational data. In this study, we focus on kinetic energy ( TKE ) sea ice and distinguish its two different vertical structures, “Surface” type “Elevated” type, using observations during Multidisciplinary drifting Observatory for Study Climate expedition (MOSAiC). The maximum near (at 2 m), while at a higher level (6 m). budget analysis indicates that is caused by increased shear production 6 m. addition, spectral reveals contribution horizontal large eddies enhanced in type. Finally, how structure affects parameterization turbulent momentum flux discussed.

Language: Английский

Assessing the effectiveness of convective boundary layer height estimation using flight data and ERA5 profiles in the Amazon biome DOI
Rayonil Gomes Carneiro, Maisa M. Ribeiro, Luciana V. Gatti

et al.

Climate Dynamics, Journal Year: 2025, Volume and Issue: 63(2)

Published: Jan. 31, 2025

Language: Английский

Citations

0

The Two Arctic Wintertime Boundary Layer States: Disentangling the Role of Cloud and Wind Regimes in Reanalysis and Observations During MOSAiC DOI Creative Commons
Sandro Dahlke, Annette Rinke, Matthew D. Shupe

et al.

Atmospheric Science Letters, Journal Year: 2025, Volume and Issue: 26(4)

Published: April 1, 2025

ABSTRACT The wintertime central Arctic atmosphere comprises a radiatively clear and opaque state, which are linked to synoptic forcing mixed‐phase clouds. Weather climate models often lack process representations surrounding these states, but prior work mostly treated the problem as an aggregate of conditions, resulting in partially overlapping biases. Here, we disaggregate states confront ERA5 reanalysis with observations from MOSAiC campaign over sea ice during winter 2019/2020. Low‐level winds liquid water path (LWP) combined derive different classes. Results show that state is primarily formed by weak/moderate absence liquid‐bearing clouds, while strong enhanced LWP form state. struggles reproduce basic statistics, shows too weak sensitivity thermal radiation forcing, overestimates for similar amounts. latter caused warm bias, has pronounced inversion structure largest calm conditions. Under bias constant height discrepancies cloud altitude appear. Separating conditions regarded useful process‐oriented evaluation troposphere models.

Language: Английский

Citations

0

Sea Breeze-Driven Variations in Planetary Boundary Layer Height over Barrow: Insights from Meteorological and Lidar Observations DOI Creative Commons
Hui Li, Wei Gong, Boming Liu

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(9), P. 1633 - 1633

Published: May 5, 2025

The planetary boundary layer height (PBLH) in coastal Arctic regions is influenced by sea breeze circulation. However, the specific mechanisms through which affects PBLH evolution remain insufficiently explored. This study uses meteorological data, micro-pulse lidar (MPL) and sounding profiles from 2014 to 2021 investigate annual polar day driven breezes Barrow region of Alaska, as well mechanisms. results show that events significantly suppress PBLH, especially during day, when prolonged solar radiation intensifies thermal contrast between land ocean. cold, moist stabilizes atmospheric conditions, reducing net sensible heat flux. All these factors inhibit turbulent mixing development. Lidar analyses further reveal lower compared non-sea-breeze with peak its probability density distribution occurring at a range. variable importance projection (VIP) analysis identifies relative humidity (VIP = 1.95) temperature 1.1) primary controlling highlighting influence stability regulating PBLH. These findings emphasize crucial role modulating PBL dynamics Arctic, significant implications for improving climate models studies on pollutant dispersion regions.

Language: Английский

Citations

0

The Vertical Structure of Turbulence Kinetic Energy Near the Arctic Sea‐Ice Surface DOI Creative Commons
Shijie Peng, Qinghua Yang, Matthew D. Shupe

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(21)

Published: Nov. 10, 2024

Abstract Atmospheric turbulence over the Arctic sea‐ice surface has been understudied due to lack of observational data. In this study, we focus on kinetic energy ( TKE ) sea ice and distinguish its two different vertical structures, “Surface” type “Elevated” type, using observations during Multidisciplinary drifting Observatory for Study Climate expedition (MOSAiC). The maximum near (at 2 m), while at a higher level (6 m). budget analysis indicates that is caused by increased shear production 6 m. addition, spectral reveals contribution horizontal large eddies enhanced in type. Finally, how structure affects parameterization turbulent momentum flux discussed.

Language: Английский

Citations

2