UP1.2 | Atmospheric boundary-layer processes, turbulence and land-atmosphere interactions
Atmospheric boundary-layer processes, turbulence and land-atmosphere interactions
Convener: Gert-Jan Steeneveld | Co-conveners: Carlos Román-Cascón, Nikki Vercauteren, Bert Holtslag
Orals
| Tue, 05 Sep, 09:00–16:00 (CEST)|Lecture room B1.02
Posters
| Attendance Tue, 05 Sep, 16:00–17:15 (CEST) | Display Mon, 04 Sep, 09:00–Wed, 06 Sep, 09:00|Poster area 'Day room'
Orals |
Tue, 09:00
Posters
Tue, 16:00
Atmospheric boundary-layer (ABL) processes and their interactions with the underlying surface are crucial for weather, climate, air-quality and renewable-energy forecasts. The multitude of interacting processes act on a variety of temporal and spatial scales and include atmospheric turbulence, atmosphere-soil-vegetation interactions, gravity waves, boundary-layer interactions with dry and moist convection, mesoscale flows, submeso motions, etc.

Although significant advances have been achieved during the last decades, an appropriate comprehension of ABL processes and their interactions under different conditions is still a challenge in meteorology. Improving this knowledge will help to correctly represent ABL processes in weather and climate models, allowing to provide more accurate numerical weather prediction (NWP) forecasts and climate scenarios.

This session welcomes conceptual, observational and modeling research related to the physical processes that appear in the ABL, including those devoted to study the interactions with the free atmosphere above and with the surface below. Current contributions evaluating existing models and schemes are also welcome, as well as the presentation of new implementation in numerical modelling.

The following topics are especially encouraged to be submitted to the session:

• Theoretical and experimental studies of the turbulence-closure problem with emphasis on very stable stratification and convection, accounting for interactions between the mean flow, turbulence, internal waves and large-scale self-organized structures.

• Boundary-layer clouds (including fog) and marine, cloud-topped boundary layers: physics and parameterization within NWP and climate models and observational studies.

• Orographic effects: form drag, wave drag and flow blocking, gravity waves.

• Challenges on the surface-exchange processes, including soil-vegetation-atmosphere transfers. Flux aggregation in atmospheric boundary layers over heterogeneous terrain.

• Representation of boundary layers and land-surface interaction in atmospheric models.

• Organization of deep convection across differing atmospheric scales.

• Large-eddy simulation and direct numerical simulation of turbulent flows.

• PBL and surface-layer studies using long-term data (climatology), detailed analysis of case studies and field campaigns presentation.

Orals: Tue, 5 Sep | Lecture room B1.02

Chairpersons: Gert-Jan Steeneveld, Carlos Román-Cascón, Bert Holtslag
EMS2023-5
|
solicited
|
Onsite presentation
Beyond Monin-Obukhov Similarity Theory and the Implications for Turbulence over Complex Terrain
Ivana Stiperski et al.
EMS2023-88
|
Onsite presentation
Towards uniformity in the near-surface temperature profile
Judith Boekee et al.
EMS2023-368
|
Onsite presentation
Climatologies of Anisotropy in the Reynolds Stress Tensor
Laura Mack et al.
EMS2023-548
|
Onsite presentation
A stochastic stability equation for unsteady turbulence in the stable boundary layer
Nikki Vercauteren and Vyacheslav Boyko
EMS2023-299
|
Onsite presentation
Storage and transport processes in an idealized valley with a LES reference
Ivan Bašić et al.
Coffee break
Chairpersons: Nikki Vercauteren, Carlos Román-Cascón, Gert-Jan Steeneveld
11:00–11:15
Introducing Sue Grimmond and Larry Mahrt as the 2023 Zilitinkevich awardees by Bert Holtslag
EMS2023-630
|
solicited
|
Onsite presentation
Simplicity and  complexity trade-offs in modelling urban-atmosphere
Sue Grimmond
EMS2023-279
|
Onsite presentation
Evaluation of ABL parameterization methods in ICON over the Swiss Plateau
Shweta Singh and Juerg Schmidli
EMS2023-344
|
Onsite presentation
Plume rise model for merging plumes
Enrico Ferrero et al.
Lunch break
Chairpersons: Bert Holtslag, Nikki Vercauteren, Gert-Jan Steeneveld
EMS2023-506
|
Onsite presentation
Scale dependent land-atmosphere coupling strength in regional climate modelling
Hajnalka Breuer and Ákos János Varga
EMS2023-429
|
Onsite presentation
Impact of regional forest cover on boundary-layer clouds in southwest France.
Patrick Le Moigne et al.

Posters: Tue, 5 Sep, 16:00–17:15 | Poster area 'Day room'

Display time: Mon, 4 Sep 09:00–Wed, 6 Sep 09:00
Chairpersons: Carlos Román-Cascón, Nikki Vercauteren, Gert-Jan Steeneveld
EMS2023-360
|
Onsite presentation
Convective Boundary Layer: Some Unresolved Issues
(withdrawn)
Lakshmi Kantha et al.