The Experts below are selected from a list of 810 Experts worldwide ranked by ideXlab platform
David A Hooper - One of the best experts on this subject based on the ideXlab platform.
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NERC MSTRF Sky-Camera Time-Lapse Video for 2010-09-07 16:50 UTC (showing Cumulonimbus cloud development at sunset).
2017Co-Authors: David A HooperAbstract:A time-lapse video showing Cumulonimbus cloud development at sunset. Most of the first Cumulonimbus cloud is obscured by the smaller Cumulus Clouds in the foreground. Its anvil is clearly visible. Three further Cumulonimbus Clouds cast crepuscular rays from the light of the setting sun. Their anvils merge together. This video has been created from images taken by the NERC MST Radar Facility's Sky-Camera, which is located near Aberystwyth in West Wales. The images are freely available, under an Open (UK) Government License, from http://tinyurl.com/nerc-mstrf-sky-camera/ . For an explanation of the atmospheric phenomena that can be seen, download the resource available at http://cedadocs.ceda.ac.uk/1259/ .
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NERC MSTRF Sky-Camera Time-Lapse Video for 2010-09-07 05:30 UTC (showing widespread development of Cumulonimbus Clouds, some of which have extensive Anvils).
2017Co-Authors: David A HooperAbstract:A time-lapse video showing widespread development of Cumulonimbus Clouds, some of which have extensive Anvils. A variety of other cumuloform Clouds can be seen. The origin of the widespread cirrus cloud seen during the second half of the sequence is probably outflow from Cumulonimbus anvils. This video has been created from images taken by the NERC MST Radar Facility's Sky-Camera, which is located near Aberystwyth in West Wales. The images are freely available, under an Open (UK) Government License, from http://tinyurl.com/nerc-mstrf-sky-camera/ . For an explanation of the atmospheric phenomena that can be seen, download the resource available at http://cedadocs.ceda.ac.uk/1259/ .
Kazuhisa Tsuboki - One of the best experts on this subject based on the ideXlab platform.
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2006: Dimension characteristics and precipitation efficiency of Cumulonimbus Clouds in the region SEPTEMBER 2010
2016Co-Authors: Yukari Shusse, Kazuhisa TsubokiAbstract:Dimension characteristics in precipitation properties of Cumulonimbus Clouds are basic parameters in understanding the vertical transport of water vapor in the atmosphere. In this study, the dimension char-acteristics and precipitation efficiency of Cumulonimbus Clouds observed in the Global Energy and Water Cycle Experiment (GEWEX) Asian Monsoon Experiment (GAME) Huaihe River Basin Experiment (HUBEX) are studied using data from X-band Doppler radars and upper-air soundings. The maximum echo area (EAmax) of the Cumulonimbus Clouds ranged from 0.5 to 470 km 2, and the maximum echo top (ETmax) ranged from 2 to 19 km. The total number of cells (TNC) within the Cumulonimbus Clouds over their lifetime was from 1 to 25. The ETmax, TNC, area time integral (ATI), and total rainfall amount (Rtot) strongly correlate with the EAmax of the Cumulonimbus Clouds. The cell-averaged ATI (ATIcell ATI/TNC), maximum rainfall intensity (RImax), and cell-averaged rainfall amount (Rcell Rtot/TNC) increase when the EAmax is smaller than 100 km2. On the other hand, they are almost constant when the EAmax is larger than 100 km 2. The rai
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Dimension Characteristics and Precipitation Efficiency of Cumulonimbus Clouds in the Region Far South from the Mei-Yu Front over the Eastern Asian Continent
Monthly Weather Review, 2006Co-Authors: Yukari Shusse, Kazuhisa TsubokiAbstract:Abstract Dimension characteristics in precipitation properties of Cumulonimbus Clouds are basic parameters in understanding the vertical transport of water vapor in the atmosphere. In this study, the dimension characteristics and precipitation efficiency of Cumulonimbus Clouds observed in the Global Energy and Water Cycle Experiment (GEWEX) Asian Monsoon Experiment (GAME) Huaihe River Basin Experiment (HUBEX) are studied using data from X-band Doppler radars and upper-air soundings. The maximum echo area (EAmax) of the Cumulonimbus Clouds ranged from 0.5 to 470 km2, and the maximum echo top (ETmax) ranged from 2 to 19 km. The total number of cells (TNC) within the Cumulonimbus Clouds over their lifetime was from 1 to 25. The ETmax, TNC, area time integral (ATI), and total rainfall amount (Rtot) strongly correlate with the EAmax of the Cumulonimbus Clouds. The cell-averaged ATI (ATIcell = ATI/TNC), maximum rainfall intensity (RImax), and cell-averaged rainfall amount (Rcell = Rtot/TNC) increase when the EA...
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Estimation for effects of existence of urban on development of Cumulonimbus Clouds using atmosphere-land coupled model of CReSiBUC
2005Co-Authors: Qoosaku Moteki, Kazuhisa Tsuboki, Yotaro Ito, Kazuaki Yorozu, Kazuyoshi Souma, Atsushi Sakakibara, Teruyuki Kato, Kenji Tanaka, Shuichi IkebuchiAbstract:In this study, a model of CReSiBUC coupled with a cloud resolving model CReSS and a land surface processes model SiBUC was developed, and effects of existence of urban on development of Cumulonimbus Clouds were investigated. From a simulation for a super cell thunderstorm on 24 September 1999, rainfall amounts simulated with the CReSiBUC were confirmed to be significantly different from that with the normal CReSS. From a simulation for Nerima heavy rainfall on 21 July 1999, it was found that changes of distribution of urban and anthropogenic heat amount greatly affected the positions and amounts of rainfall.
Margaret A Lemone - One of the best experts on this subject based on the ideXlab platform.
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vertical velocity in oceanic convection off tropical australia
Journal of the Atmospheric Sciences, 1994Co-Authors: Christopher Lucas, Edward J. Zipser, Margaret A LemoneAbstract:Abstract Time series of 1-Hz vertical velocity data collected during aircraft penetrations of oceanic Cumulonimbus Clouds over the western Pacific warm pool as part of the Equatorial Mesoscale Experiment (EMEX) are analyzed for updraft and downdraft events called cores. An updraft core is defined as occurring whenever the vertical velocity exceeds 1 m s−1 for at least 500 m. A downdraft core is defined analogously. Over 19 000 km of straight and level flight legs are used in the analysis. Five hundred eleven updraft cores and 253 downdraft cores are included in the dataset. Core properties are summarized as distributions of average and maximum vertical velocity, diameter, and mass flux in four altitude intervals between 0.2 and 5.8 km. Distributions are approximately lognormal at all levels. Examination of the variation of the statistics with height suggests a maximum in vertical velocity between 2 and 3 km; slightly lower or equal vertical velocity is indicated at 5 km. Near the freezing level, virtual t...
Yukari Shusse - One of the best experts on this subject based on the ideXlab platform.
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2006: Dimension characteristics and precipitation efficiency of Cumulonimbus Clouds in the region SEPTEMBER 2010
2016Co-Authors: Yukari Shusse, Kazuhisa TsubokiAbstract:Dimension characteristics in precipitation properties of Cumulonimbus Clouds are basic parameters in understanding the vertical transport of water vapor in the atmosphere. In this study, the dimension char-acteristics and precipitation efficiency of Cumulonimbus Clouds observed in the Global Energy and Water Cycle Experiment (GEWEX) Asian Monsoon Experiment (GAME) Huaihe River Basin Experiment (HUBEX) are studied using data from X-band Doppler radars and upper-air soundings. The maximum echo area (EAmax) of the Cumulonimbus Clouds ranged from 0.5 to 470 km 2, and the maximum echo top (ETmax) ranged from 2 to 19 km. The total number of cells (TNC) within the Cumulonimbus Clouds over their lifetime was from 1 to 25. The ETmax, TNC, area time integral (ATI), and total rainfall amount (Rtot) strongly correlate with the EAmax of the Cumulonimbus Clouds. The cell-averaged ATI (ATIcell ATI/TNC), maximum rainfall intensity (RImax), and cell-averaged rainfall amount (Rcell Rtot/TNC) increase when the EAmax is smaller than 100 km2. On the other hand, they are almost constant when the EAmax is larger than 100 km 2. The rai
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Dimension Characteristics and Precipitation Efficiency of Cumulonimbus Clouds in the Region Far South from the Mei-Yu Front over the Eastern Asian Continent
Monthly Weather Review, 2006Co-Authors: Yukari Shusse, Kazuhisa TsubokiAbstract:Abstract Dimension characteristics in precipitation properties of Cumulonimbus Clouds are basic parameters in understanding the vertical transport of water vapor in the atmosphere. In this study, the dimension characteristics and precipitation efficiency of Cumulonimbus Clouds observed in the Global Energy and Water Cycle Experiment (GEWEX) Asian Monsoon Experiment (GAME) Huaihe River Basin Experiment (HUBEX) are studied using data from X-band Doppler radars and upper-air soundings. The maximum echo area (EAmax) of the Cumulonimbus Clouds ranged from 0.5 to 470 km2, and the maximum echo top (ETmax) ranged from 2 to 19 km. The total number of cells (TNC) within the Cumulonimbus Clouds over their lifetime was from 1 to 25. The ETmax, TNC, area time integral (ATI), and total rainfall amount (Rtot) strongly correlate with the EAmax of the Cumulonimbus Clouds. The cell-averaged ATI (ATIcell = ATI/TNC), maximum rainfall intensity (RImax), and cell-averaged rainfall amount (Rcell = Rtot/TNC) increase when the EA...
G. S. Bhat - One of the best experts on this subject based on the ideXlab platform.
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Characteristics of monsoonal precipitating cloud systems over the Indian subcontinent derived from weather radar data
WILEY, 2018Co-Authors: Sindhu, Kapil Dev, G. S. BhatAbstract:The convective area within a mesoscale convective system (MCS) contains intense convective cells or storms which themselves could be made of a single Cumulonimbus cloud or several of them joined together. Interconnection between MCS evolution and storms has not been reported previously. We address this gap area by using the Doppler Weather Radar (DWR) data collected at four stations in India during the summer monsoon season of 2013. The four DWR locations selected have different climates ranging from coastal to semi-arid. Storm is defined as a set of contiguous radar pixels in three-dimensional space with a reflectivity threshold of 30 dBZ and the threshold criterion is satisfied in a volume of at least 50km(3). Monsoonal MCSs contain a few to more than 20 storms depending on geographic location and MCS life stage. The average area of storms ranges from 13 to 170km(2) while storm heights mostly lie between 6 and 10km. The growth stage of an MCS is characterized by a rapid increase in the number of storms, while their number and average area decrease in the dissipation stage. Storms occupy 30-70% of the convective area within an MCS and contribute 90-97% of the convective precipitation at any given instant. Thus, a few to several Cumulonimbus Clouds grouped together in a contiguous manner matter most for convective precipitation, making storm scale an important scale in the hierarchy of scales in tropical deep convective cloud systems. This has implications for cumulus parametrization as well as planning satellite payloads for observing precipitation
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Vertical structure of Cumulonimbus towers and intense convective Clouds over the South Asian region during the summer monsoon season
Journal of Geophysical Research: Atmospheres, 2015Co-Authors: G. S. Bhat, Shailendra KumarAbstract:The vertical structure of radar reflectivity factor in active convective Clouds that form during the South Asian monsoon season is reported using the 2A25 version 6 data product derived from the precipitation radar measurements on board the Tropical Rainfall Measuring Mission satellite. We define two types of convective cells, namely, Cumulonimbus towers (CbTs) and intense convective cells (ICCs). CbT is defined referring to a reflectivity threshold of 20 dBZ at 12 km altitude and is at least 9 km thick. ICCs are constructed referring to reflectivity thresholds at 8 km and 3 km altitudes. Cloud properties reported here are based on 10 year climatology. It is observed that the frequency of occurrence of CbTs is highest over the foothills of Himalayas, plains of northern India and Bangladesh, and minimum over the Arabian Sea and equatorial Indian Ocean west of 90°E. The regional differences depend on the reference height selected, namely, small in the case of CbTs and prominent in 6–13 km height range for ICCs. Land cells are more intense than the oceanic ones for convective cells defined using the reflectivity threshold at 3 km, whereas land versus ocean contrasts are not observed in the case of CbTs. Compared to Cumulonimbus Clouds elsewhere in the tropics, the South Asian counterparts have higher reflectivity values above 11 km altitude.
