2019
DOI: 10.1029/2019gl082094
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Satellite‐Based Estimation of Cloud Top Radiative Cooling Rate for Marine Stratocumulus

Abstract: Cloud top radiative cooling rate (CTRC) is the leading term in the energy budget of a marine boundary layer capped by stratocumulus. It plays a significant role in the formation, evolution, and maintenance of the stratocumulus cloud system. This study demonstrates the feasibility of estimating the CTRC, with high accuracy, from passive satellite data only. The estimation relies on a radiative transfer model with inputs from satellite‐retrieved cloud parameters in combination with reanalysis sounding that is re… Show more

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Cited by 21 publications
(20 citation statements)
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“…Since for low clouds the net longwave radiation at cloud base is usually small, often the CTRC can be approximated by the net flux at cloud top. Figure 3 clearly shows that the integrated CTRC becomes nearly independent of LWP and droplet properties as the cloud becomes optically thick (Figure 3a) as has also been seen in observations (Zheng et al, 2019), but that the maximum CTRC does not (Figure 3b). The maximum CTRC maintains a strong dependency on the droplet concentration regardless of the LWP (Figure 3b).…”
Section: Resultssupporting
confidence: 69%
“…Since for low clouds the net longwave radiation at cloud base is usually small, often the CTRC can be approximated by the net flux at cloud top. Figure 3 clearly shows that the integrated CTRC becomes nearly independent of LWP and droplet properties as the cloud becomes optically thick (Figure 3a) as has also been seen in observations (Zheng et al, 2019), but that the maximum CTRC does not (Figure 3b). The maximum CTRC maintains a strong dependency on the droplet concentration regardless of the LWP (Figure 3b).…”
Section: Resultssupporting
confidence: 69%
“…A deeper STBL requires more CTRC for maintaining a well‐mixed state. Since the CTRC has an upper limit (Zheng et al, 2019), a deeper STBL is more likely to be stratified.…”
Section: Resultsmentioning
confidence: 99%
“…-The link between LLSC deck and surface. When an LLSC layer is coupled with the surface, its base coincides rather well with the LCL (Zhu et al, 2001;Wood, 2012). The coupling between the LLSC deck and surface may then be assessed by the distance between the cloud base height and LCL.…”
Section: Derived Diagnostics To Monitor the Llscmentioning
confidence: 99%