Exploring satellite-derived relationships between cloud droplet number concentration and liquid water path using a large- domain large-eddy simulation
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Published version
Author(s)
Type
Journal Article
Abstract
Important aspects of the adjustments to aerosol-cloud interactions can be examined using the relationship between cloud droplet number concentration (Nd) and liquid water path (LWP). Specifically, this relation can constrain the role of aerosols in leading to thicker or thinner clouds in response to adjustment mechanisms. This study investigates the satellite retrieved relationship between Nd and LWP for a selected case of mid-latitude continental clouds using high-resolution Large-eddy simulations (LES) over a large domain in weather prediction mode. Since the satellite retrieval uses the adiabatic assumption to derive the Nd, we have also considered adiabatic Nd (NAd) from the LES model for comparison. The joint histogram analysis shows that the NAd-LWP relationship in the LES model and the satellite is in approximate agreement. In both cases, the peak conditional probability (CP) is confined to lower NAd and LWP; the corresponding mean LWP (LWP) shows a weak relation with NAd. The CP shows a larger spread at higher NAd (>50 cm–3), and the LWP increases non-monotonically with increasing NAd in both cases. Nevertheless, both lack the negative NAd-LWP relationship at higher NAd, the entrainment effect on cloud droplets. In contrast, the model simulated Nd-LWP clearly illustrates a much more nonlinear (an increase in LWP with increasing Nd and a decrease in LWP at higher Nd) relationship, which clearly depicts the cloud lifetime and the entrainment effect. Additionally, our analysis demonstrates a regime dependency (marine and continental) in the NAd-LWP relation from the satellite retrievals. Comparing local vs large-scale statistics from satellite data shows that continental clouds exhibit only a weak nonlinear NAd-LWP relationship. Hence a regime-based Nd-LWP analysis is even more relevant when it comes to warm continental clouds and their comparison to satellite retrievals.
Date Issued
2022-09-16
Date Acceptance
2022-08-28
Citation
Tellus Series B: Chemical and Physical Meteorology, 2022, 74 (1), pp.176-188
ISSN
0280-6509
Publisher
Co-Action Publishing
Start Page
176
End Page
188
Journal / Book Title
Tellus Series B: Chemical and Physical Meteorology
Volume
74
Issue
1
Copyright Statement
© 2022 The Author(s). This is an open access article distributed under a Creative Commons Attribution 4.0 license (unless otherwise stated) which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. Copyright is retained by the author(s).
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000874221900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
Science & Technology
Physical Sciences
Meteorology & Atmospheric Sciences
Aerosol-cloud interaction
Cloud droplet number concentration
Liquid water path
BOUNDARY-LAYER CLOUDS
PART 1
AEROSOL INFLUENCE
MODIS
CLIMATE
PRECIPITATION
MICROPHYSICS
Publication Status
Published