The Relationship between Boundary Layer Stability and Cloud Cover in the Post-Cold-Frontal Region

Naud, Catherine M.; Booth, James F.; Del Genio, Anthony D.

doi:10.1175/JCLI-D-15-0700.1

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The Relationship between Boundary Layer Stability and Cloud Cover in the Post-Cold-Frontal Region

2016
By Naud, Catherine M. ; Booth, James F. ; Del Genio, Anthony D.
Source: Journal of Climate, 29(22), 8129-8149

[PDF-1.93 MB]

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Journal Title:

Journal of Climate
Personal Author:

Naud, Catherine M. ; Booth, James F. ; Del Genio, Anthony D.

Naud, Catherine M. ; Booth, James F. ; Del Genio, Anthony D. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; CREST (Center for Earth System Sciences and Remote Sensing Technologies and Tech Center at City College of CUNY)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; CREST (Center for Earth System Sciences and Remote Sensing Technologies and Tech Center at City College of CUNY) Less -
Description:

Using NASA Aqua MODIS and AIRS data, the relationship between low-level cloud cover (cloud top below the 700-hPa level) and boundary layer stability is explored in post-cold-frontal conditions. A linear relationship is found between seasonal cloud cover and two separate measures of inversion strength, the lower-tropospheric stability (LTS) and the estimated inversion strength (EIS), for two specific regions in the North Atlantic and Pacific in quiescent and weakly subsiding conditions. The relationship barely changes when considering dynamically active and subsiding post-cold-frontal conditions for the same regions. To explore the generality of this result and increase sample size, cold-front-centered composites of cloud cover and stability are constructed. The Northern and Southern Hemisphere seasonal cloud cover and stability distributions in the post-cold-frontal regions are then compared. A fairly good correlation between cloud cover and EIS is found in both hemispheres across all seasons, suggesting that a linear relationship between cloud cover and inversion strength proposed for quiescent conditions exists also in more dynamically active subsiding post-cold-frontal conditions. However, for a given season and hemisphere, the correlation between cloud cover and EIS degrades in post-cold-frontal regions, especially in the Northern Hemisphere. At these scales, other large-scale factors tend to correlate better with cloud cover.
Keywords:

[+]

Boundary Layer Clouds Cyclones—Tropics Stability Cloud Cover Cold Fronts Extratropical Cyclones
Source:

Journal of Climate, 29(22), 8129-8149
DOI:

https://doi.org/10.1175/JCLI-D-15-0700.1
Pubmed ID:

29983481
Pubmed Central ID:

PMC6034518
Document Type:

Journal Article
Funding:

Grant no. NA15OAR4310094
Rights Information:

Other
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Submitted
Main Document Checksum:

[+]

urn:sha256:9d5946ad6541f68894d4941016f329bcbff37bf8f61d95a7449dc10e87e1bb7a
Download URL:

https://repository.library.noaa.gov/view/noaa/28349/noaa_28349_DS1.pdf
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The Relationship between Boundary Layer Stability and Cloud Cover in the Post-Cold-Frontal Region

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