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唐佑民 《成都信息工程学院学报》1991,(1)
本文从能量平衡角度,考虑海气相互作用和纬向间的差异,设计了一个纬向平均的海气耦合一维模式,进行了模式平衡态求解、敏感性试验以及随机分析。并对模式部分计算结果进行了与实测资料的比较,验证了模式的合理性和可信性。 相似文献
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10a尺度上新疆塔里木盆地水体动态对气候因子的敏感性检验 总被引:1,自引:2,他引:1
在10a尺度上对气候因子波动是否会引起塔里木盆地水体而积波动这一问题进行了验证和分析。利用1992~2001年塔里木盆地的多时相NOAA/AVHRRNDVI数字影像,提取水体信息,反演塔里木盆地近10a来的水体动态变化。结合塔里木盆地25个气象站的降水资料,对塔里木盆地水体的动态与同期降水的关系进行空间相关分析。分析表明。塔里木盆地近10a总的水体动态对于该区域同期气候因子的敏感性不强。该结论侧面证实了近10a来的南疆水体面积动态变化是由典型干早区气候和灌溉农业等因素共同造成的,短期的气候因子波动并不起显著的作用。 相似文献
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Terrestrial faulted lacustrine basins usually have large variabilities in structural subsidence and multiple river sources. The facies in such basins are thus characterised by frequently changed facies and complex relationship of overlapped sand bodies (e.g. Liaoxi Depression of Liaodong Bay, Bohai Sea, China). Therefore, it's a great challenge to quantitatively describe evolution of sand bodies and their overlap relationship. In this study a three-dimensional stratigraphic forward model is used to solve this problem, which is corrected according to well log data. After the parameter optimization was verified against borehole strata thickness and lithology, this model had a thickness error within 8%, and the lithology distribution agreed with the well data as a whole.Four evolution phases of the Shahejie 3 Formation were recognised through the modeling. In the first phase, the lake level rose, and the eastern fan delta sand developed. In the second phase, the fan delta sand scaled up, and the braided river delta front sand developed at a small scale. In the third phase, the lake level shifted from falling to rising, the fan delta sand further expanded the scale, and the braided river delta developed at a large scale. Sands on both sides overlapped at a large scale. In the fourth phase, the lake level rose, the lake basin expanded, and lake shale was the main lithology in the study area. From the sedimentary evolution of Es3 formation, sand overlapped in the third stage. In 39.75 Ma, two parts of the sand body began to overlap and reached largest scale in 39.6 Ma, which was approximately 10 km2. Both then retrograded to a separation in 39 Ma when the overlap ended.Coupling stratigraphic forward simulation with uncertainty quantification allowed us to estimate the influence of each stratigraphic parameter on sand overlap. Fluvial discharge appears to be the most influential parameter while the initial bathymetry and lake level variations exert a minor to moderate impact. 相似文献
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