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Mohri, Keitaro (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Subjects:
First, a mean cross section along the meridian 140° E during three months (Dec. 1950—Feb. 1951) is discussed. The main characteristics are:1) An extremely strong subtropical jet (75 m sec−1) situated at 33° N near 190 mb;2) A semi-stationary sloping surface which divides almost barotropic warm tropical air in the south from more or less baroclinic temperate air situated in the north;3) A slight indication of a polar-front jet situated near 230 mb at 41° N; the weak intensity of this jet depends upon the strong variability in position of the polar front.4) Much warmer temperature in the upper troposphere to the south, and much colder temperature in the lower troposphere north of the subtropical jet, as compared with mean conditions at 76° E and 80° W.The computed mean winds at 140° E are combined with the mean isotachs given by Yeh over China, at the 12-km level. Using the acceleration determined from the isotach pattern, the mean angle of cross-contour flow at 200 mb is determined to be about 8° (between longitudes 110° and 140° E), with a mean cross-contour component of 8 in sec−1 toward lower heights, in the center of the mean jet stream.Second, daily meridional cross sections through Japan are presented for the period 8 to 15 December 1950. These show an extremely strong individual jet stream in which the observed maximum wind speed reached a velocity of more than 110 m sec−1, with near-zero absolute vorticity to the south. An associated nearly-isothermal layer underneath is much deeper (up to 4 and even 6 km) than in other parts of the globe. It is suggested that this unusual depth results from a combination of a stable layer associated with the semi-stationary subtropical jet, and the polar front, when the latter moves southward in east Asia. The behavior of the tropopause in the intermediate atmosphere south of the polar front during this series suggests subsidence of the tropopause and its transformation into the lower boundary of a deep stable layer which is transformed into some kind of front separating the real tropical air from a more temperate air moving in from the regions north of the Himalayas.DOI: 10.1111/j.2153-3490.1953.tb01066.x
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Fig. 9. Surface maps for 1230 G C T (a) 9 December, (b) 1 1 December and (c) 1 3 Deceniber 1950. Double shafted arrows indicate movements of pressure systems 24 hr before and after each map time.
    • Fig. I I . 1500 G C T 8 December 1950.(Notc two frontal layers.)
    • Fig. 15. 1500 G C T 10 December 1950. (Note subsidence of polar front.)
    • ARAKAWHA.,, 1951: Possible heavy turbulcnt exchange between the extratropical tropospheric air and thc polar stratospheric air. Tellits, 3,208-21 I.
    • BOLIN,B., 1950: O n the influencc of the earth's orography o n the gcncral character of the westerlies. Tefftrs, a, 184-195.
    • BJERKNEJS., and P A L M ~ NE.,, 1937: Invcstigations of selected European cyclones by means of serial ascents. Geo/js. Pnbl., 12, no. 2.
    • UROOKS,C. E. P., DURSTC, . S., CARRUTHERNS., DEWARD,.,and SAWYERJ., S., 1950: Upper winds over the world. Geophyr. Memoirs No. 8 5 . Meteorological Office, London.
    • CHAUDIIURYA,. M., 1950: O n the vertical distribution of wind and temperature over Indo-Pakistan along the meridian 76' E in winter. Tellus, a, 56-62.
    • HESS, S. L., 1948: Sonic new mean meridional cross sections through the atmosphere. J . Meteor., 5. 293- 300.
    • HUTCHINGJ.S.W., 1950: A nicridional atmospheric cross section for an ocean region.]. Meteor., 7.94-100.
    • LOEWEF, .,and RADOKU, ., 1950:A meridional aerological cross section in the southwcst Pacific. /. Meteor., 7. 58-65,
    • NAMIASJ,.,and CLAPPP,. F., 1949: Confluence theory of the high tropospheric j e t stream. J . Meteor., 6 , 3 30-3 36.
    • 0 0 1 , S., MATSUMOTSO. , andIroo, H., 1951: A study on westerly troughs near Japan (I). Papers in Meteor. and Geopkys., a, 3-4. 219-233.
    • 0 0 1 , S . , MATSUMOTOS .,, and ARAKAWAA,,, 1952: A study on westerly troughs near Japan (11). Papers in Meteor. and Groplrys., 3, I , 1-11.
    • P A L M ~ NE.,, 1948: O n the distribution of tcmperaturc and wind in the upper westerlies..[. Meteor., 5. 20-27.
    • PALMBNE, . , ~ ~ ~ N A GKL. EMR., ,1948: An analysis of the wind and temperature distribution in the free atmospherc over North America in a case of approximately westerly flow. J . M e t e o r . , 5. 58-64,
    • PALMENE,., and NEWTONC,. W., 1948: A study of the mean wind and temperature distribution in thc vicinity of the polar front in wintcr. 1.Meteor., 5, 220- 226.
    • P A L M ~EN ,I ~ ~OIn:thc three-dimensional motions in an outbreak of polar air. /. Mcteor., 8, 25-39.
    • - 1951: Thc role of atmospheric disturbanccs in the general circulation. Qiiart. /. R . Met. Sor., 77. 337-354.
    • PETTERSSESN.,, 1950: Some aspects of the general circulation of the atmosphere. In Centenary Proceedings qf the Royol M e t e o r u l q i c a l Society 1950, 120-155.
    • PHILLIPSN, . A., 1949: The work done on the surrounding atmosphere by subsiding cold air inasscs. J . Meteor., 6, 193-199,
    • - 1950: T h e bchaviour of jet streams over Eastern North America during January and February 1948. Tellrrs, 2, 116-124.
    • ROSSBYC,.-G., 1949 a: O n thc nature of the general circulation of the lower atmosphere. In The Atmospheres of the Earth and Planets. Univ. of Chicago Press, chap. 2, 16-48.
    • - 1949 b : On a mcchanisni for the release of potential energy in the atmosphere. J . Meteor., 6 , 163-180.
    • - 1951 a: O n the vertical and horizontal concentration of iiioinentuni in air and ocean currents. Part I. Telltrs, 3, 15-27,
    • - 1951 b: Uber die Vertikalverteilung von Windgeschwindigkcit w i d Schwercstabilitat in Freistrahlbewegungcn dcr obercn Troposphare. Arch. Mer. Geophys. 14. Bioklim.. 13. IV, 3-23.
    • Univcrsity of Chicago, Department of Meteorology, 1947: O n the gencral circulation of the atmosphere in middle latitudes. Bull. Amer. M c t r o r . Sor., a8, 255-2x0.
    • WULF,0..H O D G E M,., and OBLO YS., 1946: The meteorological conditions in thc uppcr reaches of the radiosondc flights ovcr thc Unitcd Statcs. 11. Diurnal effects in temperature and pressure. Miscelloneo;~~ Reports No. 2 1 . The University of Chicago Prcss.
    • YEH, T.-C., 1950: The circulation of thc high troposphere ovcr China in the winter of 1945-1946. Tellus, 2, I 73-1 83.
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