Is there an anthropogenic signature in the marine boundary layer
(MBL) aerosols (e.g., from ships)?
Most of the pollution that reaches Antarctica either within the marine boundary layer
or troposphere comes from southern hemisphere regions.
This finding is consistent with previous studies of PBL depth over central California, where shallower PBL depths during the summer than during the winter and spring are attributed to the mid to late afternoon horizontal advection of stable marine boundary layer
air that penetrates well inland away from the coast .
Considerable effort within the atmospheric science community focuses on marine boundary layer
(MBL) stratiform clouds because their radiative response to changes in the climate system is substantial yet inconsistent between various global circulation models (e.g., Palmer and Anderson 1994; Delecluse et al.
Muhlbauer, 2013: Marine boundary layer
cloud regimes and POC formation in an LES coupled to a bulk aerosol scheme.
Additionally, the airmass structure and composition have changed: the top of the SAL air mass tends to decrease very gradually, while the base becomes ill-defined and blended with the marine boundary layer
. During this time, the dust in the layer is dominated by smaller particles.
iii) improvements to the NWP modeling systems used by each country to improve surface and marine boundary layer
characterization and the prediction of refractive structures;
In general, lower O values are found in the marine boundary layer
and at lower latitudes, while high values are found at higher altitudes and at higher latitudes.
For example, IMPOWR observations are yielding important knowledge on the small-scale variations in the marine boundary layer
, such as localized pressure gradient and wind enhancements, similar to those observed in the 21 June and 23 July cases above.
The need for improved long-term but comprehensive measurements at a marine low-cloud site motivated the Clouds, Aerosol, and Precipitation in the Marine Boundary Layer
(CAP-MBL; www.arm .gov/sites/amf/grw) deployment of the U.S.
The preceding Eastern Pacific Investigation of Climate Processes in the Coupled Ocean-Atmosphere System (EPIC) provided important insight on the intertropical convergence zone (ITCZ)/ cold-tongue complex and marine boundary layer
(MBL) clouds over the SEP (Bretherton et al.
In the spring of 1995 Carl Friehe and Scott Miller (University of California, Irvine) and I spent a month off the Monterey coast aboard the research platform FLIP as part of Office of Naval Research Marine Boundary Layers