---
_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'
...