Maritime Cloud and Drizzle Microphysical Properties Retrieved From Ship‐Based Observations During MAGIC

Brendecke, Jordann; Dong, Xiquan; Xi, Baike; Wu, Peng

doi:10.1029/2020ea001588

Cited by 2 publications

(8 citation statements)

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“…The periods for performing N CCN retrievals include no clouds, non-drizzling MBL clouds, and clouds producing virga (i.e., drizzle evaporating before reaching the surface). These conditions were determined based on cloud and drizzle retrieval outputs in Brendecke et al (2021). Among the 1,295 retrieved N CCN profiles, 325 cases (25.1%) are for clear-sky conditions (no clouds), 556 cases (42.9%) for non-drizzling clouds, and 414 cases (32.0%) for virga.…”

Section: Retrieved Ccn Profilementioning

confidence: 99%

“…Brendecke et al. (2021) implemented the methods of Wu et al. (2020) to retrieve MBL cloud and drizzle microphysical properties during MAGIC using ship‐based observations.…”

Section: Introductionmentioning

confidence: 99%

“…Under what environmental conditions, they agree or not agree? The MBL cloud properties in Brendecke et al (2021) are used to study the relations between aerosols and clouds. The outline of this manuscript is as follows: a brief introduction of the instrumentation used during MAGIC, and the retrieval method of N CCN profile will be given in Section 2.…”

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confidence: 99%

“…This paper will focus on the aerosol and cloud properties collected during the Marine ARM GPCI Investigation of Clouds (MAGIC) over the Eastern North Pacific (ENP). The purpose of this study is to investigate the longitudinal variations and vertical distributions of aerosol properties, and their relations with cloud properties presented in Brendecke et al (2021). In this campaign, the Horizon Lines cargo ship, Spirit, was used to board atmospheric instrumentation to measure aerosol and cloud properties as the ship traveled to and from Los Angeles, California and Honolulu, Hawaii.…”

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confidence: 99%

“…Although there were multiple remote sensors for observing MBL cloud and precipitation properties during the MAGIC field campaign, there were no aircraft in situ measurements to provide the vertical profiles of MBL cloud and drizzle microphysical properties. Brendecke et al (2021) implemented the methods of Wu et al (2020) to retrieve MBL cloud and drizzle microphysical properties during MAGIC using ship-based observations. Wu et al (2020) developed innovative methods to decompose drizzle and cloud reflectivity in a cloud layer from ARM cloud radar measurements and then simultaneously retrieve cloud and drizzle microphysical properties during Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) field campaigns (June-July 2017 and January-February 2018).…”

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confidence: 99%

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Maritime Aerosol and CCN Profiles Derived From Ship‐Based Measurements Over Eastern North Pacific During MAGIC

Brendecke

Dong

et al. 2022

Earth and Space Science

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Atmospheric aerosols are widely recognized to give rise to a substantial radiative forcing of climate by scattering and absorbing radiation (direct effects) and by modifying the microphysical, optical, and radiative properties of clouds, affecting their reflectivity and persistence (indirect effects). One example of the aerosol indirect effects (AIEs) is Marine Cloud Brightening (MCB, Latham et al., 2012). The basic principle behind the idea is to seed marine stratocumulus clouds with numerous aerosols generated at or near the ocean surface. These particles would have a sufficiently large salt mass to ensure their activation and subsequent growth within the clouds, but not large enough to generate drizzle or precipitation. Moreover, these particles would be sufficiently numerous to enhance the cloud-droplet number concentration (N C ) to values substantially higher than the natural ones. This will result in two effects: (a) the marine boundary layer (MBL) cloud droplets become smaller and thus the MBL clouds are more reflective of incoming solar radiation (Twomey, 1977), and (b) the MBL clouds become more persistent, occupy a broader areal extent, and suppress precipitation (Albrecht, 1989). Both effects reduce the amount of solar radiation reaching the Earth's surface and therefore have a cooling effect on the planet.Understanding how aerosols influence MBL clouds remains vital in determining cloud properties and lifecycle. Each cloud droplet requires an aerosol particle to initiate growth by condensation in the real atmosphere; however, factors including the aerosol size, chemistry, and meteorological condition will determine whether a particle will become activated to allow condensation (Kohler, 1936;Zheng et al., 2020). Aerosol particles which satisfy these conditions at a given supersaturation are known as cloud condensation nuclei (CCN). Theoretically, CCN number concentrations (N CCN ) increase monotonically with increasing supersaturation until all condensation nuclei (CN) are activated. Hence, measurements of N CCN as a function of supersaturation can provide important information on the relationship between aerosols and clouds. It has long been hypothesized that aerosol concentration can affect cloud-droplet number concentration (N C ) and cloud albedo (Twomey, 1977). N CCN will also influence cloud-droplet effective radius (r c ), further affecting cloud to drizzle initiation when cloud droplets outweigh the updraft buoyancy force for drizzle to begin. Moreover, Yamaguchi et al. (2017) found that drizzle rates can affect the cloud's lifetime and the transition from stratocumulus to cumulus clouds. These indirect aerosol effects

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Section: Retrieved Ccn Profilementioning

confidence: 99%

“…Brendecke et al. (2021) implemented the methods of Wu et al. (2020) to retrieve MBL cloud and drizzle microphysical properties during MAGIC using ship‐based observations.…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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