A Tangential Wind Profile for Simulating Strong Tropical Cyclones with MM5   总被引：5，自引：0，他引：5  

GAOShanhong YANGBo WUZengmao 《中国海洋大学学报(英文版)》2005,4(1):21-28

A new tangential wind profile for simulating strong tropical cyclones is put forward and planted into the NCARAFWA tropical cyclone bogussing scheme in MM5. The scheme for the new profile can make full use of the information from routine typhoon reports, including not only the maximum wind, but also the additional information of the wind speeds of 25.7 and 15.4 ms^-1 and their corresponding radii, which are usually provided for strong cyclones. Thus, the new profile can be used to describe the outer structure of cyclones more accurately than by using the earlier scheme of MM5 in which only the maximum wind speed is considered. Numerical experimental forecasts of two strong tropical cyclones are performed to examine the new profile. Results show that by using the new profile the prediction of both cyclones‘ intensity can be obviously improved, but the effects on the track prediction of the two cyclones are different. It seems that the new profile might be more suitable for strong cyclones with shifted tracks. However, the conclusion is drawn from only two typhoon cases, so more cases are needed to evaluate the new profile.  相似文献   

省级气象业务宽带信息网络构建策略     

任晓炜 《成都信息工程学院学报》2005,20(4):447-450

根据目前省级气象部门业务发展需求,结合当地电信行业的发展状况,提出一种可持续发展的宽带网络构建方案.  相似文献   

Meteorological assessment of the surface temperatures on Titan: constraints on the surface type     

Tetsuya Tokano 《Icarus》2005,173(1):222-242

The latitudinal profile of near-surface air temperature on Titan retrieved by Voyager 1 has been difficult to understand and raised several speculations about possible exotic processes that might be occurring near Titan's surface, while the thermal properties of the surface itself are unknown. This study systematically investigates the seasonal and spatial variation of the surface temperature and air temperature in the lower troposphere by a 3-dimensional general circulation model for different putative surface types (porous icy regolith, rock-ice mixture, hydrocarbon lakes). For any viable surface type the surface temperature is unlikely to be constant through the year and should more or less vary seasonally and even diurnally, most likely by a few K. Recent observations of tropospheric clouds may be evidence of seasonal variation of the surface temperature and the model predicts in the case of solid surface the development of a convective layer with superadiabatic lapse rates near the surface exactly at those latitudes and seasons where clouds have been identified. The latitudinal profile of the surface temperature retrieved from Voyager 1 infrared spectra can be explained without invoking exotic effects, provided the thermal inertia of the surface is relatively small and/or the surface albedo is low. A dominance of water ice (high thermal inertia and high albedo) at the surface is unfavorable to reproduce the observation. The latitudinal gradient of the surface temperature is particularly large at the hydrocarbon lake surface due to low albedo and small surface drag. Local anomalies of the surface albedo or surface thermal inertia are likely to cause substantial inhomogeneities of the surface temperature. Quasi-permanent accumulation of stratospheric haze at both poles would create a perennial equator-to-pole contrast of the surface temperature, but also a substantially lower global-mean surface temperature due to an enhanced anti-greenhouse effect in summer. The air temperature in the lower troposphere exhibits a tiny latitudinal gradient and a pole-to-pole gradient due to the presence of a pole-to-pole Hadley circulation, indicating that the temperature within the planetary boundary layer may exhibit a vertical profile characteristic of season, location and scenario. There may be a shallow near-surface inversion layer in cold seasons and a shallow convective layer in warm seasons.  相似文献   

Cosmology with photometric redshift surveys     

Chris Blake  Sarah Bridle 《Monthly notices of the Royal Astronomical Society》2005,363(4):1329-1348

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On statistical lensing and the anticorrelation between 2dF QSOs and foreground galaxies     

A. D. Myers  P. J. Outram  T. Shanks  B. J. Boyle  S. M. Croom  N. S. Loaring  L. Miller  R. J. Smith 《Monthly notices of the Royal Astronomical Society》2005,359(2):741-754

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Cross-terms and weak frequency-dependent signals in the cosmic microwave background sky     

C. Hernández-Monteagudo  R. A. Sunyaev 《Monthly notices of the Royal Astronomical Society》2005,359(2):597-606

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虚拟企业的组织结构设计   总被引：4，自引：0，他引：4  

贺盛瑜  邓勇 《成都信息工程学院学报》2003,18(1):55-59

作为2l世纪主流企业组织形态的虚拟企业，如何组织设计虚拟企业，无论在理论研究还是在实际应用中都是一个非常重要的问题。从实际出发，介绍了虚拟企业的组织机制，完成了虚拟企业组织结构的详细设计。力求能够为虚拟企业组织的建立探索一种可行的思路。  相似文献   

A completely analytical family of dynamical models for spherical galaxies and bulges with a central black hole   总被引：1，自引：0，他引：1  

Maarten Baes  Herwig Dejonghe 《Monthly notices of the Royal Astronomical Society》2004,351(1):18-30

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Star formation in transient molecular clouds   总被引：1，自引：0，他引：1  

Paul C. Clark  Ian A. Bonnell 《Monthly notices of the Royal Astronomical Society》2004,347(2):L36-L40

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Stationary perturbation configurations in a composite system of stellar and coplanarly magnetized gaseous singular isothermal discs     

Yu-Qing Lou  Yue Zou 《Monthly notices of the Royal Astronomical Society》2004,350(4):1220-1252

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