Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD027508 |
Cloud-Scale Droplet Number Sensitivity to Liquid Water Path in Marine Stratocumulus | |
de Szoeke, Simon P.1; Verlinden, Kathryn L.1; Covert, David2 | |
2018-05-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:10页码:5320-5334 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Cloud droplet number concentration (N-c) is retrieved from remotely observed marine stratocumulus cloud liquid water path (LWP), cloud optical depth ((c)), and cloud thickness, using an optical model that assumes liquid water content (LWC) increases linearly from cloud base. Assuming that LWC is vertically uniform would underestimate (c) by 5% and N-c by 14%. Individual retrievals of N-c from 10-min averages vary by orders of magnitude from long-term averages. Surface cloud condensation nuclei (CCN) number concentration N-CCN is weakly but significantly correlated with N-c (R=0.3) for the day leading and 6hr following N-c. Consistent with coalescence and drizzle scavenging cloud droplets, lag correlations show that N-c decreases for 1hr after the peak area-average rain rate. Greater observed LWP for lower N-c [d(log N-c)/d(log LWP)=-2.3] is consistent with enhanced entrainment drying of clouds with greater N-c and consistent with removal of N-c by thicker clouds with more coalescence and drizzle. Stronger precipitation in clouds with greater N-c is the opposite sensitivity as expected were LWP to be controlled by the cloud lifetime indirect aerosol effect. The strong sensitivity of N-c to LWP suggests that cloud dynamic and thermodynamic forcings drive macrophysical variability that controls N-c in southeastern tropical Pacific stratocumulus clouds. Regressions are relatively insensitive to assumptions about the covariance of errors among the sensors. |
英文关键词 | stratocumulus clouds cloud lifetime indirect aerosol effect remote sensing cloud droplet number concentration liquid water path cloud optical depth |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435445600032 |
WOS关键词 | RADIATIVE PROPERTIES ; STRATIFORM CLOUDS ; VARIABILITY ; PACIFIC ; MICROPHYSICS ; CONTRASTS ; AEROSOLS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33138 |
专题 | 气候变化 |
作者单位 | 1.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | de Szoeke, Simon P.,Verlinden, Kathryn L.,Covert, David. Cloud-Scale Droplet Number Sensitivity to Liquid Water Path in Marine Stratocumulus[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(10):5320-5334. |
APA | de Szoeke, Simon P.,Verlinden, Kathryn L.,&Covert, David.(2018).Cloud-Scale Droplet Number Sensitivity to Liquid Water Path in Marine Stratocumulus.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(10),5320-5334. |
MLA | de Szoeke, Simon P.,et al."Cloud-Scale Droplet Number Sensitivity to Liquid Water Path in Marine Stratocumulus".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.10(2018):5320-5334. |
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