Zobrazeno 1 - 10
of 24
pro vyhledávání: '"J. R. McAfee"'
Publikováno v:
Geophysical Research Letters. 23:2149-2152
During the past five years an unusually prolonged warm event has occurred in the equatorial Pacific ocean. As recently discussed by Trenberth and Hoar [1996], this prolonged warm event represents a major climate perturbation in the historical record
Publikováno v:
Journal of Geophysical Research: Atmospheres. 101:15061-15070
Observations of tropospheric winds have been made nearly continuously since early 1986 in the altitude range 2–18 km using a 50 MHz VHF wind profiler at Christmas Island (2°N, 157°W). Tropospheric zonal winds observed at Christmas Island show a p
Publikováno v:
Radio Science. 30:1027-1042
Wind-profiling Doppler radars measure the radial component of motion in the “clear atmosphere” along the radar beam. At lower VHF (e.g., 50 MHz) the backscattering process is highly anisotropic with maximum returns from stable layers near vertica
Autor:
D. A. Carter, K. S. Gage, A. C. Riddle, Warner L. Ecklund, Christopher R. Williams, Paul E. Johnston, J. R. McAfee
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 11:22-31
After a decade of development, VHF wind profilers are being used for atmospheric research at several locations in the tropical Pacific. A prototype 50-MHz wind profiler was installed on Christmas Island in 1985 and has operated continuously since Mar
Autor:
A. C. Riddle, George C. Reid, Warner L. Ecklund, D. A. Carter, Ben B. Balsley, K. S. Gage, Paul E. Johnston, J. R. McAfee
Publikováno v:
Eos, Transactions American Geophysical Union. 74:137-142
Nearly continuous observations of tropospheric wind at Christmas Island (2°N, 157°W) have been made since March 1986 using a VHF wind-profiling Doppler radar. The interannual zonal wind variations observed at this central Pacific location show a cl
Publikováno v:
Geophysical Research Letters. 19:1827-1830
Wind-profiling Doppler radars measure vertical motions along a vertically-directed beam. By averaging over long periods it is possible to measure very small mean vertical motions. Long-term measurements at Christmas Island have been analyzed to deter
Publikováno v:
Geophysical Research Letters. 19:1471-1474
Four years of hourly averaged atmospheric wind measurements from the Christmas Island VHF wind profiler were processed into typical days to show the vertical phase structure of the diurnal and semidiurnal tropospheric zonal winds. The winds from the
Autor:
A. C. Riddle, J. R. McAfee, K. S. Gage, Ben B. Balsley, Warner L. Ecklund, G. C. Reid, D. A. Carter
Publikováno v:
Science (New York, N.Y.). 254(5039)
Measurement from Christmas Island (2 degrees N, 157 degrees W) of long-term mean vertical motions in the tropical atmosphere using very-high-frequency wind-profiling Doppler radar show that there is a transition from downward motion in the free tropo
Publikováno v:
Radio Science. 29:879-880
Examples of vertical velocity measurements by the VHF and UHF profilers at Platteville, Colorado, are presented. These show excellent agreement on timescales of 1 min, suggesting that both systems are measuring true vertical velocities.