How Does Orography Enhance Precipitation in Australian Wintertime Storms?

Biases in Southern Ocean Precipitation From Shallow Convection: The Role of Cloud Morphology

T Alinejadtabrizi, Y Huang, F Lang, AV Sreenath, C Poulsen, S Siems, P May

2026-02-16

Precipitation from marine boundary layer clouds is a critical yet highly uncertain feature of post-frontal conditions over the Sou..

Simulating Closed-to-Open Mesoscale Cellular Convection Over the Southern Ocean: Part I. Evaluation Using SOCRATES and CAPRICORN Observations

E Montoya Duque, Y Huang, ST Siems, H Morrison, PT May

2025-12-28

Understanding Earth's climate sensitivity remains a critical challenge for improving climate projections. Discrepancies between re..

Simulating Closed-to-Open Mesoscale Cellular Convection Over the Southern Ocean: Part II. Perturbed Physics Experiments

E Montoya Duque, Y Huang, ST Siems, H Morrison, PT May

2025-12-28

Accurate representation of mesoscale cellular convective (MCC) cloud morphology over the Southern Ocean is essential for improving..

Characterizing the Shape of Cloud Particle Size Distributions in High-Latitude Marine Cold-Air Outbreaks

LGB Aragon, J Crosier, PJ Connolly, Y Huang, PT May, SJ Abel

2025-10-16

Marine cold-air outbreaks (MCAOs) drive significant evolutions in marine boundary layer clouds and play a crucial role in high-lat..

Contributions of the synoptic meteorology to the seasonal cloud condensation nuclei cycle over the Southern Ocean

T Alinejadtabrizi, Y Huang, F Lang, S Siems, M Manton, L Ackermann, M Keywood, R Humphries, P Krummel, A Williams, G Ayers

2025-02-28

Cloud condensation nuclei (CCN) play a fundamental role in determining the microphysical properties of low-level clouds that are c..

Characterizing precipitation and improving rainfall estimates over the Southern Ocean using ship-borne disdrometer and dual-polarimetric C-band radar

Larry Aragon, Yi Huang, Peter May, Jonathan Crosier, Estefania Montoya Duque, Paul Connolly, Keith Bower

2024-03-28

Large satellite discrepancies and model biases in representing precipitation over the Southern Ocean (SO) are related directly to ..

Wet deposition in shallow convection over the Southern Ocean

Tahereh Alinejadtabrizi, Francisco Lang, Yi Huang, Luis Ackermann, Melita Keywood, Gregory Ayers, Paul Krummel, Ruhi Humphries, Alastair Williams, Steven Siems, Michael Manton

2024-02-27

Southern Ocean (SO) air is amongst the most pristine on Earth, particularly during winter. Historically, there has been a focus on..

Microphysical mechanisms of wintertime postfrontal precipitation enhancement over the Australian Snowy Mountains

Artur Gevorgyan, Steven Siems, Yi Huang, Luis Ackermann, Michael Manton

2024-01-01

A heavy orographic precipitation event associated with the postfrontal sector of a midlatitude cyclone over the Australian Snowy M..

On the relationship between mesoscale cellular convection and meteorological forcing: Comparing the Southern Ocean against the North Pacific

Francisco Lang, Steven Siems, Yi Huang, Luis Ackermann

2024-01-01

Marine atmospheric boundary layer (MABL) clouds cover vast areas over the ocean and have important radiative effects on the Earth'..

Characteristics and Variability of Precipitation Across Different Sectors of an Extra-Tropical Cyclone: A Case Study Over the High-Latitudes of the Southern Ocean

SCH Truong, ST Siems, PT May, Y Huang, Vignon, A Gevorgyan

2023-11-27

Shipborne observations from the CAPRICORN-2018 field campaign were used to investigate the characteristics and variability of prec..

An evaluation of IMERG and ERA5 quantitative precipitation estimates over the Southern Ocean using shipborne observations

Estefania Montoya Duque, Yi Huang, Peter May, Steven Siems

2023-09-19

Recent voyages of the Australian RV Investigator across the remote Southern Ocean have provided unprecedented observations of prec..

Simulation of Heavy Precipitation and the Production of Graupel Related to the Passage of a Cold Front over the Australian Snowy Mountains

A Gevorgyan, L Ackermann, Y Huang, S Siems, M Manton

2022-12-01

The case study of a heavy precipitation event associated with the passage of cold front over the Australian Snowy Mountains (ASM) ..

Southern Ocean precipitation: Toward a process-level understanding

ST Siems, Y Huang, MJ Manton

2022-11-01

Large differences continue to exist between current precipitation products over the Southern Ocean (SO). This limits our ability t..

A Characterization of Clouds and Precipitation Over the Southern Ocean From Synoptic to Micro Scales During the CAPRICORN Field Campaigns

E Montoya Duque, Y Huang, ST Siems, PT May, A Protat, GM McFarquhar

2022-09-16

The persistent Southern Ocean (SO) shortwave radiation biases in climate models and reanalyses have been associated with the poor ..

Biases in the thermodynamic structure over the Southern Ocean in ERA5 and their radiative implications

Son Cong Hoang Truong, Yi Huang, Steven Siems, Michael Manton, Francisco Lang

2022-04-18

The thermodynamic structure of the lower troposphere in the 37 standard levels ERA5 reanalysis has been evaluated against 2,186 hi..

A climatology of open and closed mesoscale cellular convection over the Southern Ocean derived from Himawari-8 observations

F Lang, L Ackermann, Y Huang, SCH Truong, ST Siems, MJ Manton

2022-02-15

Marine atmospheric boundary layer clouds cover vast areas of the Southern Ocean (SO), where they are commonly organized into mesos..

Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean

Y Huang, ST Siems, MJ Manton

2021-06-16

In situ observations made over 20 flights during three Austral winters (June to October 2013–2015) were analyzed to characterize t..

Shallow convection and precipitation over the Southern Ocean: A case study during the CAPRICORN 2016 field campaign

Francisco Lang, Yi Huang, Alain Protat, Steven Siems, Michael Manton, Son Truong

2021-04-13

Marine boundary layer clouds and precipitation observed in a sustained period of open mesoscale cellular convection (MCC) over the..

A Climatology of the Marine Atmospheric Boundary Layer over the Southern Ocean from Four Field Campaigns during 2016–2018

Son Truong, Yi Huang, Francisco Lang, Martina Messmer, Ian Simmonds, Steven Siems, Michael Manton

2020-10-27

A climatology of the marine atmospheric boundary layer (MABL) and the lower free troposphere over the Southern Ocean (SO) is const..

Simulations of orographic precipitation in the Snowy Mountains of Southeastern Australia

F Sarmadi, Y Huang, G Thompson, ST Siems, MJ Manton

2019-05-01

Wintertime cold fronts generate much of the precipitation in the Snowy Mountains of south eastern Australia where orographic cloud..

Evaluation of wintertime precipitation forecasts over the Australian Snowy Mountains

Y Huang, T Chubb, F Sarmadi, ST Siems, MJ Manton, CN Franklin, E Ebert

2018-07-15

This study evaluates the Australian Community Climate and Earth-System Simulator (ACCESS) Numerical Weather Prediction system in f..

Characteristics of wintertime daily precipitation over the Australian Snowy Mountains

F Sarmadi, Y Huang, ST Siems, MJ Manton

2017-10-01

The relationship between orographic precipitation, low-level thermodynamic stability, and the synoptic meteorology is explored for..