Differences in aerosol and cloud properties along the central California coast when winds change from northerly to southerly

Published: Feb. 20, 2024

Abstract. Wind reversals resulting in southerly flow along the California coast are not well understood terms of how aerosol and cloud characteristics change. This gap is addressed using airborne field measurements enhanced with data from space-borne remote sensing (Moderate Resolution Imaging Spectroradiometer), surface stations (Interagency Monitoring Protected Visual Environments), models (Navy Aerosol Analysis Prediction System Coupled Ocean/Atmosphere Mesoscale System), a focus on sub- supermicron aerosol, microphysical variables: droplet number concentration (Nd), optical thickness (COT), effective radius (re). Southerly coincided higher values submicron (Na) mass concentrations species representative fine pollution (NO3- nss-SO42-) shipping/continental emissions (V, oxalate, NH4+, Ni, OC, EC). Supermicron Na did change, however, heightened levels acidic reduced Cl-:Na+ suggestive Cl- depletion salt particles. Clouds responded correspondingly flow, more water, similar as phase (e.g., NO3-, nss-SO42-, V), elevated Nd COT re during campaigns liquid water paths. Case study flights help to visualize offshore gradients highlight sensitivity results presence widespread smoke coverage including associated plumes have Na. These implications for aerosol-cloud interactions wind reversals, relevance weather, public welfare, aviation.

Language: Английский

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Comment on egusphere-2024-392

Published: March 29, 2024

Abstract. Wind reversals resulting in southerly flow along the California coast are not well understood terms of how aerosol and cloud characteristics change. This gap is addressed using airborne field measurements enhanced with data from space-borne remote sensing (Moderate Resolution Imaging Spectroradiometer), surface stations (Interagency Monitoring Protected Visual Environments), models (Navy Aerosol Analysis Prediction System Coupled Ocean/Atmosphere Mesoscale System), a focus on sub- supermicron aerosol, microphysical variables: droplet number concentration (N_d), optical thickness (COT), effective radius (r_e). Southerly coincided higher values submicron (N_a) mass concentrations species representative fine pollution (NO₃^- nss-SO₄^2-) shipping/continental emissions (V, oxalate, NH₄⁺, Ni, OC, EC). Supermicron N_a did change, however, heightened levels acidic reduced Cl^-:Na⁺ suggestive Cl^- depletion salt particles. Clouds responded correspondingly flow, more water, similar as phase (e.g., NO₃^-, nss-SO₄^2-, V), elevated N_d COT r_e during campaigns liquid water paths. Case study flights help to visualize offshore gradients highlight sensitivity results presence widespread smoke coverage including associated plumes have N_a. These implications for aerosol-cloud interactions wind reversals, relevance weather, public welfare, aviation.

Language: Английский

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Comment on egusphere-2024-392

Published: April 1, 2024

Abstract. Wind reversals resulting in southerly flow along the California coast are not well understood terms of how aerosol and cloud characteristics change. This gap is addressed using airborne field measurements enhanced with data from space-borne remote sensing (Moderate Resolution Imaging Spectroradiometer), surface stations (Interagency Monitoring Protected Visual Environments), models (Navy Aerosol Analysis Prediction System Coupled Ocean/Atmosphere Mesoscale System), a focus on sub- supermicron aerosol, microphysical variables: droplet number concentration (N_d), optical thickness (COT), effective radius (r_e). Southerly coincided higher values submicron (N_a) mass concentrations species representative fine pollution (NO₃^- nss-SO₄^2-) shipping/continental emissions (V, oxalate, NH₄⁺, Ni, OC, EC). Supermicron N_a did change, however, heightened levels acidic reduced Cl^-:Na⁺ suggestive Cl^- depletion salt particles. Clouds responded correspondingly flow, more water, similar as phase (e.g., NO₃^-, nss-SO₄^2-, V), elevated N_d COT r_e during campaigns liquid water paths. Case study flights help to visualize offshore gradients highlight sensitivity results presence widespread smoke coverage including associated plumes have N_a. These implications for aerosol-cloud interactions wind reversals, relevance weather, public welfare, aviation.

Language: Английский

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Comment on egusphere-2024-392

Published: May 14, 2024

Abstract. Wind reversals resulting in southerly flow along the California coast are not well understood terms of how aerosol and cloud characteristics change. This gap is addressed using airborne field measurements enhanced with data from space-borne remote sensing (Moderate Resolution Imaging Spectroradiometer), surface stations (Interagency Monitoring Protected Visual Environments), models (Navy Aerosol Analysis Prediction System Coupled Ocean/Atmosphere Mesoscale System), a focus on sub- supermicron aerosol, microphysical variables: droplet number concentration (N_d), optical thickness (COT), effective radius (r_e). Southerly coincided higher values submicron (N_a) mass concentrations species representative fine pollution (NO₃^- nss-SO₄^2-) shipping/continental emissions (V, oxalate, NH₄⁺, Ni, OC, EC). Supermicron N_a did change, however, heightened levels acidic reduced Cl^-:Na⁺ suggestive Cl^- depletion salt particles. Clouds responded correspondingly flow, more water, similar as phase (e.g., NO₃^-, nss-SO₄^2-, V), elevated N_d COT r_e during campaigns liquid water paths. Case study flights help to visualize offshore gradients highlight sensitivity results presence widespread smoke coverage including associated plumes have N_a. These implications for aerosol-cloud interactions wind reversals, relevance weather, public welfare, aviation.

Language: Английский

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