MBL, which the stratocumulus decks are generally unable to penetrate. Subtropics creates a strong temperature inversion at the top of the The descending branch of the Hadley circulation in the Pool of cold water created by upwelling ocean currents west of theĬontinents. In the subtropics, extensive stratocumulus cloud decks form over the Wang et al., 2003 Xue and Feingold, 2006) or changes in The atmosphere and may modulate cloud properties by enhancingĮvaporation (e.g. The absorption of short-wave radiation by aerosols will locally heat ThisĮffect is known as the first aerosol indirect effect. Increase in cloud droplet number density and a decrease in cloudĭroplet size, provided that the moisture content is constant. Through an increase in cloud condensation nuclei (CCN) ( Albrecht, 1989 Ackerman et al., 2000) or change the cloud short-wave albedo Aerosols are expected to modulate the low-levelĬloud cover through an aerosol-induced reduction in precipitation An estimated 4 % increase in MBLĬloud cover could offset the warming due to a doubling of CO 2 ( Randall et al., 1984). Radiation, due to their low altitude (and thus high temperature) The ocean, while they contribute only slightly to the downward thermal (30 %–40 %) over a dark ocean reduces the flux of solar radiation into The earth's radiative energy has long been recognized. The importance of low-level marine boundary layer (MBL) clouds for
The lidar has the largeĪdvantage of retrieving both cloud and aerosol properties using a Previous studies of cloud base droplet sizes. The lidar estimates of the cloud effective radius are consistent with Robust and at least as accurate as the lidar–radiometer measurements. The lidar retrievals were testedĪgainst more traditional radar–radiometer measurements and shown to be
Over the southeastern Atlantic Ocean will likely accelerate the
More susceptible to evaporation, and smoke in the marine boundary layer Smaller droplets near the cloud base makes them Of 0.3 ± 0.21 and a cloud effective radiusĪCI r of 0.18 ± 0.06 were found, due to the presence of smoke inĪnd under the clouds. In September 2016, a cloud droplet number density ACI N Smoke from the African continent was determined during the monsoonalĭry season. The aerosol–cloud interaction (ACI) due to the presence of Number density near the cloud base of marine boundary layer cumulusĬlouds. Southeastern Atlantic Ocean, to infer cloud droplet sizes and droplet Is located in the stratocumulus-to-cumulus transition zone of the Understood climatic processes and were studied over Ascension Island.Ī ground-based UV polarization lidar was deployed on Ascension Island, which The interactions between aerosols and clouds are among the least
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