--- _id: '10653' abstract: - lang: eng text: Squall lines are known to be the consequence of the interaction of low-level shear with cold pools associated with convective downdrafts. Also, as the magnitude of the shear increases beyond a critical shear, squall lines tend to orient themselves. The existing literature suggests that this orientation reduces incoming wind shear to the squall line, and maintains equilibrium between wind shear and cold pool spreading. Although this theory is widely accepted, very few quantitative studies have been conducted on supercritical regime especially. Here, we test this hypothesis with tropical squall lines obtained by imposing a vertical wind shear in cloud resolving simulations in radiative convective equilibrium. In the sub-critical regime, squall lines are perpendicular to the shear. In the super-critical regime, their orientation maintain the equilibrium, supporting existing theories. We also find that as shear increases, cold pools become more intense. However, this intensification has little impact on squall line orientation. acknowledgement: The authors gratefully acknowledge funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Project CLUSTER, Grant Agreement No. 805041), and from the PhD fellowship of Ecole Normale Supérieure de Paris-Saclay. Two supplementary movies are also provided showing the angle detection method and the squall line of the Usfc = 10 m s−1 simulation. article_number: e2021GL095184 article_processing_charge: No article_type: original author: - first_name: Sophie full_name: Abramian, Sophie last_name: Abramian - first_name: Caroline J full_name: Muller, Caroline J id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b last_name: Muller orcid: 0000-0001-5836-5350 - first_name: Camille full_name: Risi, Camille last_name: Risi citation: ama: Abramian S, Muller CJ, Risi C. Shear-convection interactions and orientation of tropical squall lines. Geophysical Research Letters. 2022;49(1). doi:10.1029/2021GL095184 apa: Abramian, S., Muller, C. J., & Risi, C. (2022). Shear-convection interactions and orientation of tropical squall lines. Geophysical Research Letters. Wiley. https://doi.org/10.1029/2021GL095184 chicago: Abramian, Sophie, Caroline J Muller, and Camille Risi. “Shear-Convection Interactions and Orientation of Tropical Squall Lines.” Geophysical Research Letters. Wiley, 2022. https://doi.org/10.1029/2021GL095184. ieee: S. Abramian, C. J. Muller, and C. Risi, “Shear-convection interactions and orientation of tropical squall lines,” Geophysical Research Letters, vol. 49, no. 1. Wiley, 2022. ista: Abramian S, Muller CJ, Risi C. 2022. Shear-convection interactions and orientation of tropical squall lines. Geophysical Research Letters. 49(1), e2021GL095184. mla: Abramian, Sophie, et al. “Shear-Convection Interactions and Orientation of Tropical Squall Lines.” Geophysical Research Letters, vol. 49, no. 1, e2021GL095184, Wiley, 2022, doi:10.1029/2021GL095184. short: S. Abramian, C.J. Muller, C. Risi, Geophysical Research Letters 49 (2022). date_created: 2022-01-23T23:01:27Z date_published: 2022-01-16T00:00:00Z date_updated: 2023-08-02T14:00:17Z day: '16' ddc: - '550' department: - _id: CaMu doi: 10.1029/2021GL095184 ec_funded: 1 external_id: isi: - '000743989800040' file: - access_level: open_access checksum: 08f88b57b8e409b42e382452cd5f297b content_type: application/pdf creator: cchlebak date_created: 2022-01-24T12:14:41Z date_updated: 2022-01-24T12:14:41Z file_id: '10662' file_name: 2022_GeophysResearchLet_Abramian.pdf file_size: 1117408 relation: main_file success: 1 file_date_updated: 2022-01-24T12:14:41Z has_accepted_license: '1' intvolume: ' 49' isi: 1 issue: '1' language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 629205d8-2b32-11ec-9570-e1356ff73576 call_identifier: H2020 grant_number: '805041' name: organization of CLoUdS, and implications of Tropical cyclones and for the Energetics of the tropics, in current and waRming climate publication: Geophysical Research Letters publication_identifier: eissn: - 1944-8007 issn: - 0094-8276 publication_status: published publisher: Wiley quality_controlled: '1' related_material: link: - relation: earlier_version url: https://doi.org/10.1002/essoar.10507697.1 scopus_import: '1' status: public title: Shear-convection interactions and orientation of tropical squall lines tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 49 year: '2022' ...