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Adaptive behavior of marine cellular clouds.

Koren I, Feingold G - Sci Rep (2013)

Bottom Line: Shallow marine clouds appear in two formations - open cells that are weakly reflective and closed cells that are more reflective and hence more effective at cooling the climate system.Lagrangian satellite data analysis reveals that open cells oscillate, forming and disappearing with a periodicity of ~3 hours.These dynamical states are linked to two theoretical solutions of population dynamics.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Sciences Weizmann Institute, Rehovot 76100, Israel. ilan.koren@weizmann.ac.il

ABSTRACT
Shallow marine clouds appear in two formations - open cells that are weakly reflective and closed cells that are more reflective and hence more effective at cooling the climate system. Lagrangian satellite data analysis reveals that open cells oscillate, forming and disappearing with a periodicity of ~3 hours. In contrast, closed cells maintain rigid structures for periods of more than 10 hours, suggesting that self-organisation breaks the link between the lifetime and the scale of a convective entity. These dynamical states are linked to two theoretical solutions of population dynamics.

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Related in: MedlinePlus

Following the evolution of a cross-section of closed-cell cloud field (above) and open cell field (below).Note how in the closed-cell case a clear line of ridges marking individual cells survive throughout the daylight sample period (~10 hours). On the other hand, the open cells (below) exhibit a rearrangement of the field via continuous formation and dissipation of cloud cells.
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f3: Following the evolution of a cross-section of closed-cell cloud field (above) and open cell field (below).Note how in the closed-cell case a clear line of ridges marking individual cells survive throughout the daylight sample period (~10 hours). On the other hand, the open cells (below) exhibit a rearrangement of the field via continuous formation and dissipation of cloud cells.

Mentions: To further illustrate the differences in the rigidity of the cloud-field morphology, we highlight the evolution in time of a cross-section of open- and closed-cell cloud fields. Figure 3 shows a Hovmöller diagram of the two fields following spatial changes of a given strip of the cloud field in time.


Adaptive behavior of marine cellular clouds.

Koren I, Feingold G - Sci Rep (2013)

Following the evolution of a cross-section of closed-cell cloud field (above) and open cell field (below).Note how in the closed-cell case a clear line of ridges marking individual cells survive throughout the daylight sample period (~10 hours). On the other hand, the open cells (below) exhibit a rearrangement of the field via continuous formation and dissipation of cloud cells.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3753593&req=5

f3: Following the evolution of a cross-section of closed-cell cloud field (above) and open cell field (below).Note how in the closed-cell case a clear line of ridges marking individual cells survive throughout the daylight sample period (~10 hours). On the other hand, the open cells (below) exhibit a rearrangement of the field via continuous formation and dissipation of cloud cells.
Mentions: To further illustrate the differences in the rigidity of the cloud-field morphology, we highlight the evolution in time of a cross-section of open- and closed-cell cloud fields. Figure 3 shows a Hovmöller diagram of the two fields following spatial changes of a given strip of the cloud field in time.

Bottom Line: Shallow marine clouds appear in two formations - open cells that are weakly reflective and closed cells that are more reflective and hence more effective at cooling the climate system.Lagrangian satellite data analysis reveals that open cells oscillate, forming and disappearing with a periodicity of ~3 hours.These dynamical states are linked to two theoretical solutions of population dynamics.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Sciences Weizmann Institute, Rehovot 76100, Israel. ilan.koren@weizmann.ac.il

ABSTRACT
Shallow marine clouds appear in two formations - open cells that are weakly reflective and closed cells that are more reflective and hence more effective at cooling the climate system. Lagrangian satellite data analysis reveals that open cells oscillate, forming and disappearing with a periodicity of ~3 hours. In contrast, closed cells maintain rigid structures for periods of more than 10 hours, suggesting that self-organisation breaks the link between the lifetime and the scale of a convective entity. These dynamical states are linked to two theoretical solutions of population dynamics.

Show MeSH
Related in: MedlinePlus