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| 1 | Relationship between Indian Ocean dipole and ENSO and their connection with the onset of South China Sea summer monsoon显示文摘用雷纳兹和史密斯 1950 ~ 1998 重建了与华南海夏季风(SCSSM ) 的发作讨论在 ENSO 和印度洋偶极子(IOD ) 和他们的可能的连接之间的关系的每月平均数的 SST,结果如下被获得:大多数 IOD 事件在夏天和秋天有一种密切积极的关系到同时的 ENSO 事件。在秋天(成熟阶段) 的 IOD 事件也是仔细与在冬季(成熟阶段) 的 ENSO 事件有关。当这些二种事件发生在阶段时,我。e。, positive (negative ) IODevents 被结合 El Nino (拉·尼娜) 事件,他们总是被跟随由迟了(或早) SCSSM 的发作。相反,当这些二种事件从阶段发生时,我。e。positive (negative ) IOD 事件被结合拉·尼娜(El Nino ) 事件,他们被 SCSSM 的正常发作跟随。另外,单个 IOD 事件或单个 ENSO 事件不能对应于很好 SCSSM 的反常发作。 | LIANG Zhaoning WEN Zhiping LIANG Jieyi WU Liji WU Naigeng | 2006 | Acta Oceanologica Sinica2006，25，6： | 3 |
| 2 | Insights into Convective-scale Predictability in East China: Error Growth Dynamics and Associated Impact on Precipitation of Warm-Season Convective Events显示文摘This study investigated the regime-dependent predictability using convective-scale ensemble forecasts initialized with different initial condition perturbations in the Yangtze and Huai River basin(YHRB)of East China.The scale-dependent error growth(ensemble variability)and associated impact on precipitation forecasts(precipitation uncertainties)were quantitatively explored for 13 warm-season convective events that were categorized in terms of strong forcing and weak forcing.The forecast error growth in the strong-forcing regime shows a stepwise increase with increasing spatial scale,while the error growth shows a larger temporal variability with an afternoon peak appearing at smaller scales under weak forcing.This leads to the dissimilarity of precipitation uncertainty and shows a strong correlation between error growth and precipitation across spatial scales.The lateral boundary condition errors exert a quasi-linear increase on error growth with time at the larger scale,suggesting that the large-scale flow could govern the magnitude of error growth and associated precipitation uncertainties,especially for the strong-forcing regime.Further comparisons between scale-based initial error sensitivity experiments show evident scale interaction including upscale transfer of small-scale errors and downscale cascade of larger-scale errors.Specifically,small-scale errors are found to be more sensitive in the weak-forcing regime than those under strong forcing.Meanwhile,larger-scale initial errors are responsible for the error growth after 4 h and produce the precipitation uncertainties at the meso-β-scale.Consequently,these results can be used to explain underdispersion issues in convective-scale ensemble forecasts and provide feedback for ensemble design over the YHRB. | Xiaoran ZHUANG Jinzhong MIN Liu ZHANG Shizhang WANG Naigeng WU Haonan ZHU | 2020 | Advances in Atmospheric Sciences2020，37，8： | 3 |
| 3 | New Evidence for Improving Omega Estimation by Explicitly Considering Horizontal Divergence显示文摘It is well known that the quasi-geostrophic(QG) omega equation with only two contributors respectively associated with vorticity advection(VA) and temperature advection is derived for midlatitude synoptic-scale systems only. Based on reliable reanalysis data, new evidence revealed by cyclonic and anticyclonic cases indicates that forecasters might sometimes experience problems by paying too much attention to the 500-hPa VA when estimating vertical motions not only in subtropical systems but also in systems meeting all the assumptions of the QG omega equation. Our investigations also showed that explicitly considering the vertical profiles of horizontal divergence could allow for better interpretation of vertical motions and weather in these real cases, suggesting that this equation might not be sufficient due to the presence of only two horizontaldivergence-related(HDR) mechanisms and the absence of other HDR mechanisms, e.g., frictional force, mountain barriers, diabatic/adiabatic processes, and acceleration/deceleration of air flows. | YUAN Zhuojian QI Jindian GAO Shouting FENG Yerong XU Pengcheng WU Naigeng | 2014 | Advances in Atmospheric Sciences2014，31，2： | 2 |
| 4 | Radar-based Characteristics and Formation Environment of Supercells in the Landfalling Typhoon Mujigae in 2015显示文摘This study presents the radar-based characteristics and formation environment of supercells spawned by the tornadic landfalling Typhoon Mujigae(2015)in October 2015.More than 100 supercells were identified within a 24-hour period around the time of the typhoon’s landfall,of which three were tornadic with a rotational intensity clearly stronger than those of non-tornadic supercells.The identified supercells were concentrated within a relatively small area in the northeast quadrant beyond 140 km from the typhoon center.These supercells were found more likely to form over flat topography and were difficult to maintain in mountainous regions.During the study period,more supercells formed offshore than onshore.The mesocyclones of the identified supercells were characterized by a small diameter generally less than 5 km and a shallow depth generally less than 4 km above ground level.An environmental analysis revealed that the northeast quadrant had the most favorable conditions for the genesis of supercell in this typhoon case.The nondimensional supercell composite parameter(SCP)and entraining-SCP(E-SCP)were effective in separating supercell from non-supercell environment.Even though the atmosphere in the typhoon’s northeast quadrant was characterized by an E-SCP/SCP value supportive of supercell organization,orography was an impeditive factor for the supercell development.These findings support the use of traditional parameters obtained from midlatitude supercells to assess the supercell potential in a tropical cyclone envelope. | Lanqiang BAI Zhiyong MENG Ruilin ZHOU Guixing CHEN Naigeng WU Wai-Kin WONG | 2022 | Advances in Atmospheric Sciences2022，39，5： | 1 |
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