Thermal chains and entrainment in cumulus updrafts. Part I: Theoretical description

H Morrison, JM Peters, AC Varble… - Journal of the …, 2020 - journals.ametsoc.org
Recent studies have shown that cumulus updrafts often consist of a succession of discrete
rising thermals with spherical vortex-like circulations. In this paper, a theory is developed for …

[HTML][HTML] The influence of shear on deep convection initiation. Part I: Theory

JM Peters, H Morrison, TC Nelson… - Journal of the …, 2022 - journals.ametsoc.org
This article introduces a novel hypothesis for the role of vertical wind shear (“shear”) in deep
convection initiation (DCI). In this hypothesis, initial moist updrafts that exceed a width and …

[HTML][HTML] The influences of effective inflow layer streamwise vorticity and storm-relative flow on supercell updraft properties

JM Peters, CJ Nowotarski… - Journal of the …, 2020 - journals.ametsoc.org
The Influences of Effective Inflow Layer Streamwise Vorticity and Storm-Relative Flow on
Supercell Updraft Properties in: Journal of the Atmospheric Sciences Volume 77 Issue 9 (2020) …

Disentangling the influences of storm-relative flow and horizontal streamwise vorticity on low-level mesocyclones in supercells

JM Peters, BE Coffer, MD Parker… - Journal of the …, 2023 - journals.ametsoc.org
Sufficient low-level storm-relative flow is a necessary ingredient for sustained supercell
thunderstorms and is connected to supercell updraft width. Assuming a supercell exists, the …

A formula for the maximum vertical velocity in supercell updrafts

JM Peters, H Morrison, CJ Nowotarski… - Journal of the …, 2020 - journals.ametsoc.org
In supercell environments, previous authors have shown strong connections between the
vertical wind shear magnitude, updraft width, and entrainment. Based on these results, it is …

How does vertical wind shear influence entrainment in squall lines?

JP Mulholland, JM Peters… - Journal of the …, 2021 - journals.ametsoc.org
The influence of vertical wind shear on updraft entrainment in squall lines is not well
understood. To address this knowledge gap, a suite of high-resolution idealized numerical …

[HTML][HTML] Influences of environmental relative humidity and horizontal scale of subcloud ascent on deep convective initiation

H Morrison, JM Peters, KK Chandrakar… - Journal of the …, 2022 - journals.ametsoc.org
This study examines two factors impacting initiation of moist deep convection: free-
tropospheric environmental relative humidity (ϕ E) and horizontal scale of subcloud ascent …

[HTML][HTML] Generalized lapse rate formulas for use in entraining CAPE calculations

JM Peters, JP Mulholland… - Journal of the …, 2022 - journals.ametsoc.org
Common assumptions in temperature lapse rate formulas for lifted air parcels include
neglecting mixing, hydrostatic balance, the removal of all condensate once it forms …

Deep convection initiation, growth, and environments in the complex terrain of Central Argentina during CACTI

Z Feng, A Varble, J Hardin, J Marquis… - Monthly Weather …, 2022 - journals.ametsoc.org
This study characterizes the wide range of deep convective cloud life cycles and their
relationships with ambient environments observed during the Cloud, Aerosol, and Complex …

Environmental controls on simulated deep moist convection initiation occurring during RELAMPAGO-CACTI

TC Nelson, J Marquis, JM Peters… - Journal of the …, 2022 - journals.ametsoc.org
This study synthesizes the results of 13 high-resolution simulations of deep convective
updrafts forming over idealized terrain using environments observed during the …