A quantitative method for estimating cloud cover over tropical cyclones
                        from satellite data

Balogun, E. E.

doi:10.3402/tellusa.v29i4.11364

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…In this paper, a technique developed by the author Balogun (1977) is applied to the visible imagery of hurricane Debbie. The technique permitted the pattern of the cloud distribution in the cyclone to be studied quantitatively at different stages of its development.…”

Section: Some Previous Studies On Satelliteobserved Cloud Structures mentioning

confidence: 99%

“…The various parameters by which the cloud cover over hurricanes could be described using the photometric method have been discussed by Balogun (1977). The distribution of cloud cover estimates N (measured in tenths) and the orientation of the cloud patterns are quantitatively described by parameters r, urr and also by the phase angles of the harmonic components considered.…”

Section: Parameters For the Description Of The Cloud Patternsmentioning

confidence: 99%

“…Radial distonce from cyclone center in deqees Quantitative measurements of radiation emitted from clouds offer another set of data that can be analyzed in a manner described by Balogun (1977). The result of the analysis of digital maps of high resolution infrared radiation data of hurricane Inez (Hubert et al, 1969) pointed to the possibility that earlier methods of analysis of the visible imagery of cyclones can be extended to the analysis of infrared cyclone patterns.…”

Section: Prospects Of the Analysis Of Satellite Radiation Maps Of Tromentioning

confidence: 99%

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A diagnostic study of cloud distribution and development in hurricane Debbie August 13-19, 1969 from satellite data

Balogun¹

1977

Tellus

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A diagnostic study of cloud distribution and development in hurricane Debbie August 13–19, 1969 using satellite data and based on a photometric method described earlier by Balogun (1976) is presented. A systematic assessment of the cloudiness of a tropical cyclone over the oceans by a method that is less sensitive to personal bias demonstrates the following features of the cyclone: The gradual changes in the cloud patterns of a tropical cyclone. The changes take place in a definite manner. The non‐axis symmetric nature of the tropical cyclone cloud pattern. The lack of symmetry at the early stages of the cyclone is quantified. The parameter obtained is then used to demonstrate the process of symmetricalization at the latter stages of the cyclone. The rate of rotation of the cloud bands about a central axis of the cyclone is less than the rate of rotation of air parcels about the axis of rotation. The rate of rotation of the bands is estimated to be about 50–75% of the rotation of air parcels. This estimate was for a period of about 7 h during the lifetime of the cyclone. The lower rate of motion of the bands suggests that the field of the low level convergence moves at a different rate from the air parcels about the axis of the cyclone.

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Section: Some Previous Studies On Satelliteobserved Cloud Structures mentioning

confidence: 99%

Section: Parameters For the Description Of The Cloud Patternsmentioning

confidence: 99%

Section: Prospects Of the Analysis Of Satellite Radiation Maps Of Tromentioning

confidence: 99%

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A diagnostic study of cloud distribution and development in hurricane Debbie August 13-19, 1969 from satellite data

Balogun¹

1977

Tellus

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“…One of the atmospheric extreme events is tropical cyclone (or tropical storm) that meteorologists have studied for a hundred of years [4] [5] [6]. The identification of the internal structure of tropical storms in the Earth's atmosphere is benefited from the three-dimensional space observation such as from the ground radar echoes and space artificial satellites [7]. However, little is known about the internal characteristics of black hole events that occur in space, due to the lack of direct observations.…”

Section: Introductionmentioning

confidence: 99%

Identifying the Spatial Structure of Black Hole and Tropical Cyclone Based on a Theoretical Analysis of Orthogonal Interaction

Qian¹

2023

JMP

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Black holes are recognized by Newton's gravitational theory and Einstein's general relativity, but there is still a lack of understanding the spatial structure of events, especially the nature of event horizon. In this paper, a theoretical analysis is used to compare the structures of tropical cyclone in the atmosphere and black hole in the astronomy so that five results are: 1) Both of them share the similar spatial structure, with tropical cyclone and black hole having the outflow cloud shield and the horizon sphere in the central part, respectively, while four spiral material bands exist in the rotating plane around them; 2) In theoretically, the energy density formed by the orthogonal interaction of the four spiral material bands is as 2 0 0

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Quantifying tropical cyclone cloud cover using Envisat retrievals – an example of a recent severe tropical cyclone, ‘Thane’

Saini

Chandramouli

Samaddar

et al. 2013

International Journal of Remote Sensing

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Quantifying tropical cyclone cloud cover using Envisat retrievals -an example of a recent severe tropical cyclone,The eastern coast of peninsular India routinely receives the onslaught of devastating cyclonic storms. We suggest a novel method involving Envisat retrievals followed by application of the European Space Agency's (ESA's) Earth Observation Link Stand-Alone (EOLI-SA) catalogue for the calculation of cloud cover (CC) of tropical storms. In particular, we focus on the northeast monsoon, which is less studied as compared with the more regularly investigated southwest monsoon. We found that the CC was of the order of 946,598 km 2 on 23 November 2011. In contrast, we also calculated the CC of tropical cyclone Thane that occurred on 31 December 2011, which was found to be 1,222,224 km 2 -an increase of 197.5%. To further increase CC calculation accuracy, Moderate Resolution Imaging Spectroradiometer (MODIS) retrievals were used simultaneously over both visible and shortwave infrared (SWIR) spectra. The precipitable water levels were analysed using Tool for High-resolution Observation Review (THOR) and Tropical Rainfall Measuring Mission (TRMM) retrievals. Envisat data were then used to track Thane's trajectory. These multiple-image analyses are coupled with large-eddy simulation runs -large velocities from sheared eddies were obtained at landfall. The runs were simultaneously performed over two locales on 29 December 2011 -first at Karaikal, where the impact of Thane was severe, and then at Chennai, where the cyclone's fury had become somewhat curtailed. This procedural analysis, coupled with model simulations, can be used effectively by Environmental Impact Assessment (EIA) personnel and decision-makers of the municipal corporations of vulnerable cities along coastal Tamil Nadu.

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A quantitative method for estimating cloud cover over tropical cyclones from satellite data

Cited by 4 publications

References 4 publications

A diagnostic study of cloud distribution and development in hurricane Debbie August 13-19, 1969 from satellite data

A diagnostic study of cloud distribution and development in hurricane Debbie August 13-19, 1969 from satellite data

Identifying the Spatial Structure of Black Hole and Tropical Cyclone Based on a Theoretical Analysis of Orthogonal Interaction

Quantifying tropical cyclone cloud cover using Envisat retrievals – an example of a recent severe tropical cyclone, ‘Thane’

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