Effects of model grid spacing for warm conveyor belt (WCB) moisture transport into the upper troposphere and lower stratosphere (UTLS) – Part 1: Lagrangian perspective

Schwenk, Cornelis; Miltenberger, Annette

doi:10.5194/acp-26-7435-2026

Articles | Volume 26, issue 10

https://doi.org/10.5194/acp-26-7435-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The tropopause region in a changing atmosphere (TPChange)...

https://doi.org/10.5194/acp-26-7435-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 10

Research article

|

29 May 2026

Research article |

| 29 May 2026

Effects of model grid spacing for warm conveyor belt (WCB) moisture transport into the upper troposphere and lower stratosphere (UTLS) – Part 1: Lagrangian perspective

Cornelis Schwenk and Annette Miltenberger

Data sets

Reproducibility Repository for "Effects of Model Grid Spacing for Warm Conveyor Belt (WCB) Moisture Transport into the Upper Troposphere and Lower Stratosphere (UTLS) — Parts I and II" Cornelis Schwenk https://doi.org/10.5281/zenodo.17698646

Model code and software

Reproducibility Repository for "Effects of Model Grid Spacing for Warm Conveyor Belt (WCB) Moisture Transport into the Upper Troposphere and Lower Stratosphere (UTLS) — Parts I and II" Cornelis Schwenk https://doi.org/10.5281/zenodo.17698646

Short summary

We studied how model grid-spacing affects how moisture and ice are carried upward in large weather systems that move warm, moist air into the upper troposphere. By comparing high- and low-resolution simulations, we found that models which are able to represent convectively ascending air produce much drier air at high altitudes. This shows that model resolution strongly influences how water and clouds are transported and how they may affect climate.