Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores
Abstract
Here, six coupled and decoupled marine boundary layer (MBL) clouds were chosen from the 19 month Atmospheric Radiation Measurement Mobile Facility data set over the Azores. Thresholds of liquid water potential temperature difference ΔθL < 0.5 K (>0.5 K) and total water mixing ratio difference Δqt < 0.5 g/kg (>0.5 g/kg) below the cloud base were used for selecting the coupled (decoupled) cases. A schematic diagram was given to demonstrate the coupled and decoupled MBL vertical structures and how they associate with nondrizzle, virga, and rain drizzle events. Out of a total of 2676 5 min samples, 34.5% were classified as coupled and 65.5% as decoupled, 36.2% as nondrizzle and 63.8% as drizzle (47.7% as virga and 16.1% as rain), and 33.4% as daytime and 66.6% as nighttime. The decoupled cloud layer is deeper (0.406 km) than coupled cloud layer (0.304 km), and its liquid water path and cloud droplet effective radius (re) values (122.1 gm-2 and 13.0 µm) are higher than coupled ones (83.7 gm-2 and 10.4 µm). Conversely, decoupled stratocumuli have lower cloud droplet number concentration (Nd) and surface cloud condensation nucleus (CCN) concentration (NCCN) (74.5 cm-3 and 150.9 cm-3) than coupled stratocumuli (111.7 cm-3 and 216.4 cm-3).more »
- Authors:
-
- Univ. of North Dakota, Grand Forks, ND (United States)
- Publication Date:
- Research Org.:
- Univ. of North Dakota, Grand Forks, ND (United States)
- Sponsoring Org.:
- USDOE Office of Environment, Health, Safety and Security (AU), Office of Environmental Protection and ES&H Reporting
- OSTI Identifier:
- 1440552
- Grant/Contract Number:
- SC0008468
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research: Atmospheres
- Additional Journal Information:
- Journal Volume: 120; Journal Issue: 12; Journal ID: ISSN 2169-897X
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; coupled and decoupled boundary layers; CCN; marine boundary layer clouds; cloud microphysical properties; drizzle and nondrizzle
Citation Formats
Dong, Xiquan, Schwantes, Adam C., Xi, Baike, and Wu, Peng. Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores. United States: N. p., 2015.
Web. doi:10.1002/2014JD022939.
Dong, Xiquan, Schwantes, Adam C., Xi, Baike, & Wu, Peng. Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores. United States. https://doi.org/10.1002/2014JD022939
Dong, Xiquan, Schwantes, Adam C., Xi, Baike, and Wu, Peng. 2015.
"Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores". United States. https://doi.org/10.1002/2014JD022939. https://www.osti.gov/servlets/purl/1440552.
@article{osti_1440552,
title = {Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores},
author = {Dong, Xiquan and Schwantes, Adam C. and Xi, Baike and Wu, Peng},
abstractNote = {Here, six coupled and decoupled marine boundary layer (MBL) clouds were chosen from the 19 month Atmospheric Radiation Measurement Mobile Facility data set over the Azores. Thresholds of liquid water potential temperature difference ΔθL < 0.5 K (>0.5 K) and total water mixing ratio difference Δqt < 0.5 g/kg (>0.5 g/kg) below the cloud base were used for selecting the coupled (decoupled) cases. A schematic diagram was given to demonstrate the coupled and decoupled MBL vertical structures and how they associate with nondrizzle, virga, and rain drizzle events. Out of a total of 2676 5 min samples, 34.5% were classified as coupled and 65.5% as decoupled, 36.2% as nondrizzle and 63.8% as drizzle (47.7% as virga and 16.1% as rain), and 33.4% as daytime and 66.6% as nighttime. The decoupled cloud layer is deeper (0.406 km) than coupled cloud layer (0.304 km), and its liquid water path and cloud droplet effective radius (re) values (122.1 gm-2 and 13.0 µm) are higher than coupled ones (83.7 gm-2 and 10.4 µm). Conversely, decoupled stratocumuli have lower cloud droplet number concentration (Nd) and surface cloud condensation nucleus (CCN) concentration (NCCN) (74.5 cm-3 and 150.9 cm-3) than coupled stratocumuli (111.7 cm-3 and 216.4 cm-3). The linear regressions between re and Nd with NCCN have demonstrated that coupled re and Nd strongly depend on NCCN and have higher correlations (-0.56 and 0.59) with NCCN than decoupled results (-0.14 and 0.25). The MBL cloud properties under nondrizzle and virga drizzle conditions are similar to each other but significantly different to those of rain drizzle.},
doi = {10.1002/2014JD022939},
url = {https://www.osti.gov/biblio/1440552},
journal = {Journal of Geophysical Research: Atmospheres},
issn = {2169-897X},
number = 12,
volume = 120,
place = {United States},
year = {Wed Jun 10 00:00:00 EDT 2015},
month = {Wed Jun 10 00:00:00 EDT 2015}
}
Web of Science
Works referenced in this record:
A 25-month database of stratus cloud properties generated from ground-based measurements at the Atmospheric Radiation Measurement Southern Great Plains Site
journal, February 2000
- Dong, Xiquan; Minnis, Patrick; Ackerman, Thomas P.
- Journal of Geophysical Research: Atmospheres, Vol. 105, Issue D4
Marine Boundary Layer Cloud Observations in the Azores
journal, November 2012
- Rémillard, Jasmine; Kollias, Pavlos; Luke, Edward
- Journal of Climate, Vol. 25, Issue 21
The Atmospheric Radiation Measurement Program
journal, January 2003
- Ackerman, Thomas P.; Stokes, Gerald M.
- Physics Today, Vol. 56, Issue 1
Empirical estimates of CCN from aerosol optical properties at four remote sites
journal, January 2010
- Jefferson, A.
- Atmospheric Chemistry and Physics, Vol. 10, Issue 14
A 19-Month Record of Marine Aerosol–Cloud–Radiation Properties Derived from DOE ARM Mobile Facility Deployment at the Azores. Part I: Cloud Fraction and Single-Layered MBL Cloud Properties
journal, May 2014
- Dong, Xiquan; Xi, Baike; Kennedy, Aaron
- Journal of Climate, Vol. 27, Issue 10
Aerosol properties and their influences on marine boundary layer cloud condensation nuclei at the ARM mobile facility over the Azores: Aerosol and influences on MBL CCN
journal, April 2014
- Logan, Timothy; Xi, Baike; Dong, Xiquan
- Journal of Geophysical Research: Atmospheres, Vol. 119, Issue 8
Coupled vs. decoupled boundary layers in VOCALS-REx
journal, January 2011
- Jones, C. R.; Bretherton, C. S.; Leon, D.
- Atmospheric Chemistry and Physics, Vol. 11, Issue 14
Clouds, Aerosols, and Precipitation in the Marine Boundary Layer: An Arm Mobile Facility Deployment
journal, March 2015
- Wood, Robert; Wyant, Matthew; Bretherton, Christopher S.
- Bulletin of the American Meteorological Society, Vol. 96, Issue 3
Investigation of the Diurnal Variation of Marine Boundary Layer Cloud Microphysical Properties at the Azores
journal, December 2014
- Dong, Xiquan; Xi, Baike; Wu, Peng
- Journal of Climate, Vol. 27, Issue 23
On the Use of Earth Radiation Budget Statistics for Studies of Clouds and Climate
journal, June 1980
- Hartmann, Dennis L.; Short, David A.
- Journal of the Atmospheric Sciences, Vol. 37, Issue 6
Ship-Based Observations of the Diurnal Cycle of Southeast Pacific Marine Stratocumulus Clouds and Precipitation
journal, December 2013
- Burleyson, Casey D.; de Szoeke, Simon P.; Yuter, Sandra E.
- Journal of the Atmospheric Sciences, Vol. 70, Issue 12
Profiles of Low-Level Stratus Cloud Microphysics Deduced from Ground-Based Measurements
journal, January 2003
- Dong, Xiquan; Mace, Gerald G.
- Journal of Atmospheric and Oceanic Technology, Vol. 20, Issue 1
A new retrieval for cloud liquid water path using a ground-based microwave radiometer and measurements of cloud temperature
journal, July 2001
- Liljegren, James C.; Clothiaux, Eugene E.; Mace, Gerald G.
- Journal of Geophysical Research: Atmospheres, Vol. 106, Issue D13
Sensitivity of the Earth's radiation budget to changes in low clouds
journal, January 1990
- Slingo, A.
- Nature, Vol. 343, Issue 6253
Surface-Based Observations of Mesoscale Cumulus–Stratocumulus Interaction during ASTEX
journal, August 1995
- Miller, Mark A.; Albrecht, Bruce A.
- Journal of the Atmospheric Sciences, Vol. 52, Issue 16
Implementation of turbulent mixing over a stratocumulus-topped boundary layer and its impact in a GCM
journal, September 2009
- Shin, Sun-Hee; Ha, Kyung-Ja
- Advances in Atmospheric Sciences, Vol. 26, Issue 5
Cloud Droplet Size Distributions in Low-Level Stratiform Clouds
journal, January 2000
- Miles, Natasha L.; Verlinde, Johannes; Clothiaux, Eugene E.
- Journal of the Atmospheric Sciences, Vol. 57, Issue 2
Comparison of marine boundary layer cloud properties from CERES-MODIS Edition 4 and DOE ARM AMF measurements at the Azores: validate CERES-MODIS clouds properties
journal, August 2014
- Xi, Baike; Dong, Xiquan; Minnis, Patrick
- Journal of Geophysical Research: Atmospheres, Vol. 119, Issue 15
The Effect of Cloud Type on Earth's Energy Balance: Global Analysis
journal, November 1992
- Hartmann, Dennis L.; Ockert-Bell, Maureen E.; Michelsen, Marc L.
- Journal of Climate, Vol. 5, Issue 11
Parameterizations of the microphysical and shortwave radiative properties of boundary layer stratus from ground-based measurements
journal, December 1998
- Dong, Xiquan; Ackerman, Thomas P.; Clothiaux, Eugene E.
- Journal of Geophysical Research: Atmospheres, Vol. 103, Issue D24
An Automated Quality Assessment and Control Algorithm for Surface Radiation Measurements
journal, April 2008
- Long, C. N.; Shi, Y.
- The Open Atmospheric Science Journal, Vol. 2, Issue 1
Global distribution of total cloud cover and cloud type amounts over the ocean
report, December 1988
- Warren, S. G.; Hahn, C. J.; London, J.
Clouds, Aerosols, and Precipitation in the Marine Boundary Layer: An Arm Mobile Facility Deployment
journal, June 2016
- Wood, Robert; Wyant, Matthew; Bretherton, Christopher S.
- Bulletin of the American Meteorological Society, Vol. 2016, Issue 1
Global Distribution of Total Cloud Cover and Cloud Type Amounts Over the Ocean
text, January 1988
- Warren, Stephen; Hahn, Carol; London, Julius
- UCAR/NCAR
Works referencing / citing this record:
Prognostic Precipitation in the MIROC6‐SPRINTARS GCM: Description and Evaluation Against Satellite Observations
journal, March 2019
- Michibata, Takuro; Suzuki, Kentaroh; Sekiguchi, Miho
- Journal of Advances in Modeling Earth Systems, Vol. 11, Issue 3
Episodes of Warm‐Air Advection Causing Cloud‐Surface Decoupling During the MARCUS
journal, November 2019
- Zheng, Youtong; Li, Zhanqing
- Journal of Geophysical Research: Atmospheres, Vol. 124, Issue 22
Marine boundary layer aerosol in the eastern North Atlantic: seasonal variations and key controlling processes
journal, January 2018
- Zheng, Guangjie; Wang, Yang; Aiken, Allison C.
- Atmospheric Chemistry and Physics, Vol. 18, Issue 23