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Search Results: 1 - 10 of 526105 matches for " <br>王会军 "
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The Advance of the Atmospheric Model Intercomparison Project (AMIP)

Wang Huijun,<br>
大气科学 , 1997,
Abstract: In this paper, the author introduced the advances of the Atmospheric Model Intercomparison Project (AMIP), including its sub-projects of analysis, progress, scientific results, relative programs and prospect

地球物理学报 , 2003,
Abstract: The monthly reanalysis data set and the analyzed precipitation data set are used to study the interannual variability of Somali Jet (SMJ) and its influences on the inter-hemispheric water vapor transport and on the East Asian summer climate. It is indicated that SMJ plays a key role in the water vapor transport between the two hemispheres. SMJ transports water vapor through the equator from the southern hemisphere to the northern hemisphere during boreal summer time, and from northern hemisphere to the southern hemisphere during boreal winter time. The interannual variation of SMJ is found to be linked with the many changes around the globe, including the wave pattern along East Asia coast, the South Asian high, and dipole pattern to the southeast of Australia. The results also reveal that interannual variation of SMJ at boreal spring has significant influences on the East Asian summer rainfall and atmospheric circulation. Since the changes of SMJ precede the changes of East Asian summer climate, these findings may help to improve the summer climate prediction in East Asia.
A Preliminary Study on the Uncertainty of Short-Term Climate Prediction

Wang Huijun,<br>
气候与环境研究 , 1997,
Abstract: Based on a set of systematic hindcast experiments by IAP and OSU AGCMs and theoratical analysis the uncertainty of short-term climate prediction were studied preliminarily. The paper stressed on the uncertainties induced by atmospheric internal dynamics. The conceptual model of short-term climate predictability were concluded and the preliminary dynamical mechanisms were analysed. Future suggestions of research were proposed in the last.
Preliminary Research on the Inner-Atmosphere-Originated Seasonal Climate Predictability

WANG Hui-Jun,<br>
大气科学 , 2005,
Abstract: This is a very preliminary work on detection of seasonal climate predictability arising from the internal atmosphere. Generally speaking, seasonal climate predictability is mostly determined by the external forcing that has larger scale of temporal variation, namely, the sea surface temperature, snow cover, soil wetness, and so on. Based on analyzing the persistence of monthly mean wind anomalies and the East Asian monsoon-related global-scale atmospheric circulation anomalies, the inner-atmosphere-originated seasonal climate predictability is discussed. The results show that the wind anomalies in spring in many key regions like upper troposphere and lower stratosphere in the tropics, which is closely related to the East Asian monsoon, may persist for up to 4 to 5 months. Thus, climate predictability may be partly originated by the internal processes of the atmosphere.
The Application of the CCM3/NCAR Radiation Scheme in IAP-AGCM

YUE Xu,WANG Huijun,<br>乐旭,
大气科学 , 2009,
Abstract: The old radiation scheme in IAP9L-AGCM is replaced by a new one from the CCM3/NCAR codes.And the effects of such modification are evaluated in detail.It shows that there are many improvements in the simulated radiation fields from the new version of IAP9L-AGCM,especially some net radiation fields at the surface.As a result,there is a prevalent enhancement of the atmospheric temperature in the new version.Other fields,such as sea level pressure,surface air temperature,geopotential height,wind field,precipita...
Recent Changes in the East Asian Monsoon

WANG Huijun,FAN Ke,<br>,范可
大气科学 , 2013,
Abstract: Studies on the recent changes of the summer and winter monsoons, with priority on decadal-interdecadal scales, are reviewed briefly in this paper. The major changes in the East Asian summer monsoon (EASM) include a weakening of the EASM and a shift in precipitation patterns at the end of 1970s; an increase in South China precipitation after 1992-1993; a decrease in precipitation in the middle-and-lower reaches of the Yangtze River and an increase in precipitation in the Huaihe River valley after 1999; and instability in the relationship between the EASM and El Ni o-Southern Oscillation (ENSO). The changes in the East Asian winter monsoon (EAWM) include a weakening of the EAWM and its interannual variability after the mid-1980s, an increase in winter snowfall in Northeast China after the mid-1980s, and a weakening of the EAWM-ENSO relationship after the mid-1970s. In addition, the impact of the autumn Arctic sea ice decline on the winter snow cover in the Northern Hemisphere is discussed. These changes in EASM and EAWM indicate that the extreme climate and phenology have been significantly altered.
Signals of Darwin Atmospheric Pressure in the Tree-Ring Recorded Northeastern Mongolia Precipitation

WANG Hui-Jun,<br>
大气科学 , 2006,
Abstract: Port Darwin is a well-known place name for meteorologists,because the Southern Oscillation is usually defined as the atmospheric pressure difference between Tahiti and Port Darwin,indicating the phenomenon of so-called Walker circulation.The atmospheric pressure in Port Darwin may well represent the air mass system in northern Australia and the maritime continent.Thus the current study aims at examining the signals of the pressure in northern Australia and the maritime continent,which is represented by the Darwin pressure,in the long-term tree-ring reconstructed northeastern Mongolia precipitation.The results show that positive phase of Darwin pressure(DP) is associated with low-level divergence and high-level convergence circulations in the region,and the anomalous southwesterly flow in the high troposphere and anomalous north winds in Asia,indicating the weakening of the East Asian monsoon circulation.In northeastern Mongolia,the low-level wind anomalies are northwestward from the inland region to the northwestern Pacific,denoting the decrease of the water vapor transport from the ocean to the inland region,thus reducing the precipitation in northeastern Mongolia,and vice versa.
Satellite Remote Sensing and Systematic Model Study of Earth System

Wang Ranghui,<br>,马映
地球信息科学 , 2000,
Abstract: This paper describes trends and characteristics of satellite remote sensing by the features of miniature and serialization of satellites as well as the multi level of resolution and diversity of information sharing Meanwhile,the features of large system of earth system are revealed Moreover,the conceptual models of time and space coupling are built up taken arid zone as an example As a result,the importance of satellite remote sensing technique on digital earth researches is strengthened
Forecasting of Wind Speed in Rudong, Jiangsu Province, by the WRF Model

WANG Jun,WANG Huijun,<br>汪君,
气候与环境研究 , 2013,
Abstract: To discuss the possibility of applying a numerical Weather Research and Forecasting (WRF) model to wind power forecasting, the summer and winter hourly wind speed forecasting performance of the WRF model used in Rudong, Jiangsu Province, is analyzed in this paper. It is determined that the WRF model can forecast winter wind speed in Rudong 24 h in advance very well with a correlation coefficient as high as 0.61 compared to observations and is statistically significant at the 0.01 level. Similarly, the forecasts with leading times of 48 h and 72 h are also sufficiently accurate, according to the correlation coefficients. In summer, however, forecasting is less accurate, although the correlation coefficient of the 24 h leading forecast is 0.59, which is still statistically significant at the 0.01 level. The forecasting of wind speed in Nantong was also examined with observed data and was determined to be more accurate than that in Rudong in both winter and in summer. For a larger domain, the performance of wind forecasting is also analyzed. Results show that the performance of the WRF model is better for ocean than for land and is better in winter than in summer. In general, the forecasted wind speed is greater than the actual wind speed and the performance of the WRF model foresting differs significantly according to location and season. Essentially, short-term wind forecasting is valuable and is worthy of further investigation.

YANG Hui-jun,WANG Meng-shu,<br>杨,梦恕
岩石力学与工程学报 , 2006,
Abstract: Characteristics of tunneling engineering tend to be long, big, aeep-buried and difficult.Seepage in tunnels threatens large-scale underground excavation, and gives rise to engineering troubles such as landslide, roof caving, water bursting, etc. The characteristic of groundwater occurrence is discrete and seepage is anisotropic. Relying on the longest highway tunnel in Gansu Province, Qidaoliang Tunnel, based on the achievements from non-continuum seepage in rock mass, seepage fields in the area with the maximum flow rate inflow into the tunnel is simulated numerically. Properties of the groundwater seepage in the tunnel and changes of the surface waters level are simulated under all kinds of conditions. Comparison between the simulated results and the measured ones shows that the theoretical analysis is correct and the calculating results are reliable.
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