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dc.contributor.authorBraun, Rachel A.
dc.contributor.authorDadashazar, Hossein
dc.contributor.authorMacDonald, Alexander B.
dc.contributor.authorCrosbie, Ewan
dc.contributor.authorJonsson, Haflidi H.
dc.contributor.authorWoods, Roy K.
dc.contributor.authorFlagan, Richard C.
dc.contributor.authorSeinfeld, John H.
dc.contributor.authorSorooshian, Armin
dc.date.accessioned2019-05-10T17:10:55Z
dc.date.available2019-05-10T17:10:55Z
dc.date.issued2018
dc.identifier.citationBraun, Rachel A., et al. "Cloud Adiabaticity and Its Relationship to Marine Stratocumulus Characteristics Over the Northeast Pacific Ocean." Journal of Geophysical Research: Atmospheres 123.24 (2018): 13,790-13,806.en_US
dc.identifier.urihttp://hdl.handle.net/10945/62165
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1029/2018JD029287en_US
dc.description.abstractCloud adiabaticity (α) is defined as the ratio of the actual liquid water path (LWP measured) in a cloud to its corresponding adiabatic value (LWP ad). Processes such as drizzle and entrainment can lead to subadiabatic LWP measured. This study examines α and its relationship to microphysical properties for 86 cloud events over the Northeast Pacific Ocean based on data collected during four separate summertime airborne campaigns. For the study region, α was found to be 0.766 ± 0.134. For most cases, clouds with a low value of α were found to have lower droplet number concentration (Nd), higher droplet effective radius (re), higher relative dispersion (d), and higher rain rate (R). The subcloud aerosol concentration (Na) was often less for the low-α cases. The relationship between α and the vertical profiles and cloud-top characteristics for both the cloud droplet-only spectrum and full spectrum (cloud and rain droplets) is also examined. Inclusion of rain droplets produced a larger change in d for the low-α clouds as compared to the high-α clouds. On average, R increased at cloud top for high-α clouds but decreased at cloud top for low-α clouds. Accounting for α when estimating Nd from Moderate Resolution Imaging Spectroradiometer retrievals results in better agreement with in situ Nd values. Results of this work motivate the need for additional focus on the factors governing α, such as cloud type, and implications of its value, especially for remote-sensing retrievals.en_US
dc.description.sponsorshipMexican National Council for Science and Technology (CONACyT)en_US
dc.format.extent17 p.en_US
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleCloud Adiabaticity and Its Relationship to Marine Stratocumulus Characteristics Over the Northeast Pacific Oceanen_US
dc.typeArticleen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)en_US
dc.contributor.departmentMeteorologyen_US
dc.description.funderOffice of Naval Research N00014-10-1-0811en_US
dc.description.funderN00014-11-1-0783en_US
dc.description.funderN00014-10-1-0200en_US
dc.description.funderN00014-04-1-0118en_US
dc.description.funderN00014-16-1- 2567en_US


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