Formation and Structure of Equatorial Anticyclones Caused by Large-Scale Cross-Equatorial Flows Determined by ATS-I Photographs

Fujita, Tetsuya Theodore.; Watanabe, Kazuo; Izawa, T.

doi:10.1175/1520-0450(1969)008<0649:fasoea>2.0.co;2

Cited by 43 publications

(21 citation statements)

References 3 publications

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“…As a result, a marked velocity shift lines are seen along the leading edges of high-cloud outflow from cloud cluster regions. Similar features of outflow were reported by Fujita, et al, (1969), over the tropical Pacific.…”

Section: Velocity Of High Cloudssupporting

confidence: 87%

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Application of ATS III Photographs for Determination of Dust and Cloud Velocities over the Northern Tropical Atlantic

Fujita

1971

Journal of the Meteorological Society of Japan

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July 14, 1969 was selected from BOMEX Period IV as the day of detailed analysis of cloud velocity fi elds over the northern tropical Atlantic Ocean. A total of 375 low-cloud velocities were obtained between ITCZ and 34N and 70 velocities between ITCZ and the equator. These velocities are found to be very useful in understanding circulation pa tterns over a vast region of water where little synoptic data is availa ble.Over 170 high-cloud velocities were computed mostly in the area of cloud clusters. It was found that a field of high-cloud divergence existed over practica lly each of la rge cloud clusters in the ITCZ a nd an easterly wave a ppearing on this day. Motion of dust clouds from Sahara was a lso computed by using an accelerated movie technique. It is concluded that ATS III picture sequences can be a nalyzed independently from conventional synoptic and/ or network da ta so that the computed velocities of clouds, dust, a nd propagating waves can be used as supplementary data to past a nd future tropical experiments.

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Section: Velocity Of High Cloudssupporting

confidence: 87%

“…A similar analysis of cloud velocities over the tropical Pacific was made by Fujita, Watanabe, and Izawa (1969 ).…”

Section: Velocity Of Low Cloudsmentioning

confidence: 61%

Application of ATS III Photographs for Determination of Dust and Cloud Velocities over the Northern Tropical Atlantic

Fujita

1971

Journal of the Meteorological Society of Japan

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“…For most of the years, these unexpected activities of the WPSH play an important role in the generation of the droughts and floods in the east of the Asian regions (Ninomiya 1984;Tao and Chen 1987;Wang et al 2005). There can be seen as evidence supporting the idea that not only the circulation patterns in the midlatitude and the high latitudes (Tao and Zhu 1964), but also the tropical convection, the typhoons, and the equatorial anticyclones (Fujita et al 1969;Sadler 1971;Kurihara 1989;Huang et al 2004) could have an effect on the WPSH meridian shift.…”

Section: Definition Of the Wpsh Double Ridgessupporting

confidence: 53%

West Pacific subtropical high double ridges and intraseasonal variability of the South China Sea summer monsoon

Zhang

et al. 2009

Theor Appl Climatol

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“…As a link between the tropics and mid-latitudes, the subtropical high (SH) strongly influences the weather and climate systems in both its sides while there is also a reaction from tropical and mid-latitude systems. There are evidences to support that not only the circulation patterns in mid-and high latitudes (Tao and Zhu 1964) but also tropical convection, typhoons, and equatorial anticyclones (Fujita 1969;Sadler 1971;Kurihara 1989;Huang et al 2004) could have effects on the SH meridional shift.…”

Section: Introductionmentioning

confidence: 99%

A Case Study of Double Ridges of Subtropical High over the Western North Pacific: The Role in the 1998 Second Mei-yu over the Yangtze River Valley

Zhan

et al. 2008

Journal of the Meteorological Society of Japan

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Double ridges in the Western North Pacific Subtropical High (WPSH) in 1998 are studied as a particular case using NCEP/NCAR reanalysis data and the Black Body Temperature (TBB) data. In contrast to typical single ridge in WPSH, double ridges are found during July in 1998 and associated with the second Meiyu activity in the Yangtze River valley. The second ridge of WPSH is built up in the south of the first one and contributes to the stagnancy of WPSH in the south in middle of July. It is different from the previous view that the stagnancy of WPSH in the south resulted from the sudden southward withdrawal of the original ridge.The characteristics of double ridges including the structure, evolution and possible mechanisms are investigated with the case of 1998. The results show that there are a lot of differences in the large-scale circulation, temperature and humidity between the single ridge and double ridges of the WPSH. The north branch of the double ridges has coherent characteristics with the traditional single ridge, while the south branch is characterized by the tropical systems. There are evidences to support that the formation of the double ridges is associated with the northward movement of equatorial buffer zone and the persistence is related to the evolution of tropical convections.The rainfall pattern in eastern China associated with the double ridges of WPSH is examined using the instrumental records of precipitation in China. Two rain belts shaped as an italic "L"-like pattern in eastern China are found to be related to the double ridges. This study provides new evidence to understand the variability of WPSH and associated East Asian summer monsoon activity on synoptic scales.

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Formation and Structure of Equatorial Anticyclones Caused by Large-Scale Cross-Equatorial Flows Determined by ATS-I Photographs

Cited by 43 publications

References 3 publications

Application of ATS III Photographs for Determination of Dust and Cloud Velocities over the Northern Tropical Atlantic

Application of ATS III Photographs for Determination of Dust and Cloud Velocities over the Northern Tropical Atlantic

West Pacific subtropical high double ridges and intraseasonal variability of the South China Sea summer monsoon

A Case Study of Double Ridges of Subtropical High over the Western North Pacific: The Role in the 1998 Second Mei-yu over the Yangtze River Valley

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