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CPA

Cloud processing of aerosol during SAIL

30 September 2021 - 15 June 2023

Lead Scientist: Swarup China

Observatory: AMF

Cloud processing of aerosol during SAIL

Cloud processing of aerosols produces aerosols with dramatically different physicochemical properties than their original form. Cloud processing may transform particles into efficient cloud condensation nuclei (CCN) or ice nucleating particles (INP) that can further participate in cloud formation. We propose to study cloud processing of aerosol during the SAIL field campaign using multi-modal offline analysis techniques available at DOE’s user facility, the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory. The main scientific aim of this project is to understand the processes that transform aerosols (chemically and physically) and influence aerosol-cloud interactions. Aerosol particles undergo significant modifications due to warm (cloud droplets) and cold cloud (ice crystals) processing. Cloud processing of aerosol has important effects on the atmospheric aerosol number and mass concentration, size distribution, phase separation, and chemical composition.

Detailed size-resolved chemical composition of aerosols and their microphysical properties along with in situ measurements from ARM’s mobile facilities will improve our understanding of aerosol-cloud processes. Aerosol samples will be collected using the newly developed automated Size-and-Time-resolved Aerosol Collector (STAC). Determining size-resolved chemical composition of particles is crucial for understanding several atmospheric processes during different seasons, but challenging to accomplish due to lack of long-term measurements. The revised version of STAC is modified for long-term ground-based measurements, so it can collect samples for month without maintenance. The automated sampler will enable collection of samples within a broad size range (0.05-5.0 µm) and will provide long-term collection of samples to fill the current measurement gap at the ARM observatory site. We will analyze aerosol samples using EMSL’s microscopy, spectroscopy, and mass spectrometry platforms. Cloud-processing-induced transformation can result in specific changes in the physical and chemical properties of the aerosol. This project will provide a better representation of cloud-processing treatment and contribute to better representations of cloud-processed aerosols by providing size-resolved chemical composition and mixing state-based indices.

Timeline

SAIL: Surface Atmosphere Integrated Field Laboratory (SAIL)

1 September 2021 — 15 June 2023

Lead: Feldman, Daniel

SAILCAIVIMT: CCN and INP variability in mountainous terrain

1 September 2021 — 1 June 2023

Lead: Levin, Ezra

SAIL-AIS: Investigation of the Aerosol Impact on the Surface

1 September 2021 — 30 June 2023

Lead: Laskin, Alexander

CPA: Cloud processing of aerosol during SAIL

30 September 2021 — 15 June 2023

Lead: China, Swarup

SAILAEROSSAMPL: Aerosol Sampling During SAIL Campaign

1 October 2021 — 30 June 2023

Lead: Laskin, Alexander

TWSTSAIL: Field Validation of Cloud Properties Sensor - SAIL

18 October 2021 — 15 June 2023

Lead: Jones, Stephen

WFSDB: Watershed Field Science Data Backhaul

1 December 2021 — 31 October 2025

Lead: Wiedlea, Andrew

SAILVAPS: Vertical Aerosol Profiling during SAIL

1 April 2022 — 1 November 2022

Lead: Perkins, Russell

SSB: SAIL Supermicron Bioaerosol

1 April 2022 — 15 June 2023

Lead: Aiken, Allison

PBAS: Profiling of BioAerosols at SAIL (PBAS)

1 May 2022 — 31 July 2022

Lead: Zawadowicz, Maria Anna

SAIL-ISO: Water vapor isotopic measurements during SAIL

15 June 2022 — 15 June 2023

Lead: Galewsky, Joseph

SAILCORSIPP: Characterization of orography-influenced riming

1 September 2022 — 15 June 2023

Lead: Maahn, Maximilian

SAILTOBS: Targeted Observations of Blowing Snow during SAIL

1 September 2022 — 15 June 2023

Lead: Kennedy, Aaron

SOS: Sublimation of Snow

1 September 2022 — 30 June 2023

Lead: Lundquist, Jessica

SAIL-AVP: SAIL Aerosol Vertical Profiles

1 September 2022 — 15 June 2023

Lead: Aiken, Allison

SAILNP+: SAIL additional INP processing

5 June 2024 — 31 August 2026

Lead: Perkins, Russell

SAIL: Surface Atmosphere Integrated Field Laboratory (SAIL)

SAILCAIVIMT: CCN and INP variability in mountainous terrain

SAIL-AIS: Investigation of the Aerosol Impact on the Surface

CPA: Cloud processing of aerosol during SAIL

SAILAEROSSAMPL: Aerosol Sampling During SAIL Campaign

TWSTSAIL: Field Validation of Cloud Properties Sensor - SAIL

WFSDB: Watershed Field Science Data Backhaul

SAILVAPS: Vertical Aerosol Profiling during SAIL

SSB: SAIL Supermicron Bioaerosol

PBAS: Profiling of BioAerosols at SAIL (PBAS)

SAIL-ISO: Water vapor isotopic measurements during SAIL

SAILCORSIPP: Characterization of orography-influenced riming

SAILTOBS: Targeted Observations of Blowing Snow during SAIL

SOS: Sublimation of Snow

SAIL-AVP: SAIL Aerosol Vertical Profiles

SAILNP+: SAIL additional INP processing

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Campaign Data Sets

IOP Participant Data Source Name Final Data
STAC Order Data
TBAC Order Data
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Atmospheric Radiation Measurement (ARM) | Reviewed March 2025