Stratocumulus Precipitation and Entrainment Experiment (SPEE) Field Campaign Report

Albrecht, Bruce²  Ghate, Virendra³  CADeddu, Maria³ 

[1] Pacific Northwest National Laboratory;Univ. of Miami, Miami, FL (United States);Argonne National Lab. (ANL), Argonne, IL (United States)

关键词: marine stratocumulus clouds;    cloud turbulence;    Doppler cloud radar;    precipitation;    entrainment;    liquid water path;   

DOI  :  10.2172/1261175
RP-ID  :  DOE/SC--ARM-16-034
PID  :  OSTI ID: 1261175

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The scientific focus of this project was to examine precipitation and entrainment processes in marine stratocumulus clouds. The entrainment studies focused on characterizing cloud turbulence at cloud top using Doppler cloud radar observations. The precipitation studies focused on characterizing the precipitation and the macroscopic properties (cloud thickness, and liquid water path) of the clouds. This project will contribute to the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility???s overall objective of providing the remote-sensing observations needed to improve the representation of key cloud processes in climate models. It will be of direct relevance to the components of ARM dealing with entrainment and precipitation processes in stratiform clouds. Further, the radar observing techniques that will be used in this study were developed using ARM Southern Great Plains (SGP) facility observations under Atmospheric System Research (ASR) support. The observing systems operating automatously from a site located just north of the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) aircraft hangar in Marina, California during the period of 1 May to 4 November 2015 included: 1. Microwave radiometer: ARM Microwave Radiometer, 3-Channel (MWR3C) with channels centered at 23.834, 30, and 89 GHz; supported by Dr. Maria Cadeddu. 2. Cloud Radar: CIRPAS 95 GHz Frequency Modulated Continuous Wave (FMCW) Cloud Radar (Centroid Frequency Chirp Rate [CFCR]); operations overseen by Drs. Ghate and Albrecht. 3. Ceilometer: Vaisala CK-14; operations overseen by Drs. Ghate and Albrecht.