Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Chong-Jian Qiu"'
Autor:
Qin Xu, Chong-Jian Qiu
Publikováno v:
Journal of Applied Meteorology (1988). Jan97, Vol. 36 Issue 1, p3. 9p. 2 Charts, 7 Graphs.
Publikováno v:
Meteorology and Atmospheric Physics. 91:1-8
A two-step variational method is developed to retrieve the three-dimension wind field from single-Doppler radar observation for operational applications. The first step produces a proxy background wind field, and the second step retrieves the detaile
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e862b6055cc8b2678a60e9845daddd0c
https://doi.org/10.1007/s00703-004-0093-8
https://doi.org/10.1007/s00703-004-0093-8
Publikováno v:
Journal of Applied Meteorology. 43:1379-1391
A temporal interpolation is required for three-dimensional Doppler wind analysis when the precise measurement time is counted for each radar beam position. The time interpolation is traditionally done by a linear scheme either in the measurement spac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::691e0fbcd20d83f9fe00c64489646e6f
https://doi.org/10.1175/jam2150.1
https://doi.org/10.1175/jam2150.1
Estimating Soil Water Contents from Soil Temperature Measurements by Using an Adaptive Kalman Filter
Publikováno v:
Journal of Applied Meteorology. 43:379-389
A simple soil heat transfer model is used together with an adaptive Kalman filter to estimate the daily averaged soil volumetric water contents from diurnal variations of the soil temperatures measured at different depths. In this method, the soil wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49fde51fe48e8f620d6fae519a48565c
https://doi.org/10.1175/1520-0450(2004)043<0379:eswcfs>2.0.co
https://doi.org/10.1175/1520-0450(2004)043<0379:eswcfs>2.0.co
Autor:
Chong-Jian Qiu, Qin Xu
Publikováno v:
Journal of Applied Meteorology. 36:3-11
A variational method is developed to compute surface fluxes of sensible and latent heat from observed wind, temperature, humidity, and surface energy and radiation budget by the surface energy and radiation balance systems (SERBS). In comparison with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e126c05058a72b4c00bdb4f06b7a599f
https://doi.org/10.1175/1520-0450(1997)036<0003:avmfcs>2.0.co
https://doi.org/10.1175/1520-0450(1997)036<0003:avmfcs>2.0.co
Autor:
Qin Xu, Chong-Jian Qiu
Publikováno v:
Monthly Weather Review. 124:1132-1144
A least squares (LS) method is developed for retrieving low-altitude winds from single-Doppler radar scans. The method is tested with Denver airport microburst data and the results compared with the previously developed simple adjoint (SA) method. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc34e5538549cfe85e5f2d3fe09e29f1
https://doi.org/10.1175/1520-0493(1996)124<1132:lsromw>2.0.co
https://doi.org/10.1175/1520-0493(1996)124<1132:lsromw>2.0.co
Autor:
Chong-Jian Qiu, Qin Xu
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 12:1111-1119
The simple adjoint (SA) method is extended to use both the reflectivity equation and the radial-wind equation to retrieve the low-altitude horizontal wind field from single-Doppler reflectivity and radial-wind data. Three extended methods are propose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd2e2b9204194d79e258bdfde0a5984a
https://doi.org/10.1175/1520-0426(1995)012<1111:amrola>2.0.co
https://doi.org/10.1175/1520-0426(1995)012<1111:amrola>2.0.co
Publikováno v:
Monthly Weather Review. 123:1822-1833
Although the simple adjoint (SA) method for retrieving the low-altitude winds from single-Doppler scans was previously examined with the Phoenix II data collected for rather uniform wind fields on nonstorm days with aluminum chaff dispensed from an a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9cd373aa5ef92be1236848d28ee73d7
https://doi.org/10.1175/1520-0493(1995)123<1822:saromw>2.0.co
https://doi.org/10.1175/1520-0493(1995)123<1822:saromw>2.0.co
Autor:
Chong-Jian Qiu, Qin Xu
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 11:927-936
A spectral simple adjoint (SSA) method for retrieving, low-attitude time-mean horizontal winds from single-Doppler wind measurements is developed and tested with the Phoenix II held experimental data. The SSA method is similar to the previous grid si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb1503925b77442291aec1cbea378e2b
https://doi.org/10.1175/1520-0426(1994)011<0927:assamf>2.0.co
https://doi.org/10.1175/1520-0426(1994)011<0927:assamf>2.0.co
Autor:
Chong-Jian Qiu, Qin Xu
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 11:289-298
Three schemes are developed to incorporate a strong constraint of (incompressible) mass conservation into the basic scheme (scheme B) of the simple adjoint method of Qiu and Xu for retrieving the time-mean wind field from a sequence of single-Doppler
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d539c98d6fecd662f65b59f61c61498b
https://doi.org/10.1175/1520-0426(1994)011<0289:samfsd>2.0.co
https://doi.org/10.1175/1520-0426(1994)011<0289:samfsd>2.0.co