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| 1 | Advances in research of the mid-deep South China Sea circulation显示文摘The South China Sea(SCS)is a large marginal sea connecting the Indian and Pacific oceans.Under the factors of monsoons,strait transport,and varied bathymetry,the SCS presents a three-layer structure and strong diapycnal mixing which is far greater than that in the open ocean.Theoretical analysis and observations reveal that internal tides,internal solitary waves,and strong winds are the sources of the strong mixing in the northern SCS.A major consequence of the strong mixing is an active mid-deep circulation system.This system promotes exchange of water between the SCS and adjacent oceans,and also regulates the upper layer of wind-driven circulation,making the 3 dimensional SCS circulation clearly different from that in other tropical and subtropical marginal seas.The mass transport capacity of the mid-deep circulation has a substantial impact on marine sedimentation,the biogeochemical cycle,and other processes in the SCS.This paper summarizes the recent advances in middeep sea circulation dynamics of the SCS,and discusses the opportunities and challenges in this area. | Dongxiao WANG Qiang WANG Shuqun CAI Xiaodong SHANG Shiqiu PENG Yeqiang SHU Jingen XIAO Xiaohui XIE Zhiwei ZHANG Zhiqiang LIU Jian LAN Dake CHEN Huijie XUE Guihua WANG Jianping GAN Xinong XIE Rui ZHANG Hui CHEN Qingxuan YANG | 2019 | Science China Earth Sciences2019，62，12： | 8 |
| 2 | Recent advances in regional air-sea coupled models显示文摘In this paper,we first briefly review the history of air-sea coupled models,and then introduce the current status and recent advances of regional air-sea coupled models.In particular,we discuss the core technical and scientific issues involved in the development of regional coupled models,including the coupling technique,lateral boundary conditions,the coupling with sea waves(ices),and data assimilation.Furthermore,we introduce the application of regional coupled models in numerical simulation and dynamical downscaling.Finally,we discuss the existing problems and future directions in the development of regional air-sea coupled models. | PENG ShiQiu LIU DuanLing SUN ZhaoBo LI YiNeng | 2012 | Science China Earth Sciences2012，55，9： | 6 |
| 3 | Comparison between MM5 simulations and satellite measurements during Typhoon Chanchu (2006) in the South China Sea显示文摘The fifth Pennsylvania State University and National Center for Atmospheric Research mesoscale model (MM5) is utilized to study the precipitation and wind speed during Typhoon Chanchu (2006).Five model experiments with different physical parameterizations and sea surface temperature (SST) distributions are carried out.It is found that the control experiment configured with the Blakadar boundary scheme,Resiner2 moisture,the Betts-Miller cumulus scheme and daily updated SST has the most reasonable precipitation.The MRF boundary scheme tends to simulate a dryer boundary layer and stronger vertical mixing,which can greatly reduce the intensity of tropical cyclone (TC),resulting in a smaller maximum wind speed but larger range of medium wind speed (25-30 m/s).Constant SST through the TC cycle provides more energy from ocean surface,which could cause a significant increase in TC's intensity,thus resulting in the largest overestimation on rainfall and maximum wind speed.Longitudinally-uniform SST distribution before the rapid intensification could reduce TC's intensity and heat fluxes,which can partially compensate for the overestimation of precipitation in the control experiment. | YANG Lei WANG Dongxiao PENG Shiqiu | 2012 | Acta Oceanologica Sinica2012，31，2： | 3 |
| 4 | The early-warning effects of assimilation of the observations over the large-scale slope of the “World Roof” on its downstream weather forecasting显示文摘To improve the numerical simulation of the severe snow storms occurred in the south of China and the middle/lower reaches of Changjiang River during January of 2008, the observations from the automatic weather stations (AWS) over the Qinghai-Xizang Plateau (QXP) and its surrounding areas were assimi-lated into the Weather Research and Forecasts (WRF) model using multi-cycle 3-dimensional varia-tional data assimilation (3DVAR). Due to the large-scale special topography of the QXP and its sur-rounding areas which may reach up to the mid-troposphere, the AWS located at different height on the deep slope of the plateau are different to those located on plains and take a role analogous in some extent to that of radio soundings in obtaining the vertical 'profile' information of the atmosphere, and have the advantages in the aspects of sampling frequency, location/height fixing, and synchronization. The information captured by these AWS may carry the early-warning 'strong signals' in the upstream sensitive area for the downstream weather systems to the east of the plateau and thus the assimilation of these AWS data is expected to lead to significant improvements on the simulation of the severe weather system occurred in its downstream areas through adjusting the 3-dimensional structures of the atmospheric thermal-dynamics for the initial conditions of the model. This study indicates that the assimilated information of moisture, temperature and pressure carried in the observations of AWS over the Qinghai-Xizang Plateau and its surrounding areas is very important and useful in the forecasting of precipitation in its downstream areas. | PENG ShiQiu XU XiangDe SHI XiaoHui WANG DongXiao ZHU YuXiang PU JingJiao | 2009 | Chinese Science Bulletin2009，54，4： | 2 |
| 5 | Application of scale-selective data assimilation to tropical cyclone track simulation显示文摘 | Xie Lian Liu Bin Peng Shiqiu | | Journal of Geophysical Research Atmospheres0，，： | 1 |
| 6 | Application of Scale-Selective Data Assimilation to Regional Climate Modeling and Prediction显示文摘 | Peng Shiqiu Xie Lian Liu Bin Semazzi Fredrick | | Monthly Weather Review0，，： | 1 |
| 7 | Upper-Tropospheric Environment–Tropical Cyclone Interactions over the Western North Pacific:A Statistical Study显示文摘Based on 25-year(1987–2011) tropical cyclone(TC) best track data, a statistical study was carried out to investigate the basic features of upper-tropospheric TC–environment interactions over the western North Pacific. Interaction was defined as the absolute value of eddy momentum flux convergence(EFC) exceeding 10 m s^(-1)d^(-1). Based on this definition, it was found that 18% of all six-hourly TC samples experienced interaction. Extreme interaction cases showed that EFC can reach^120 m s^(-1)d^(-1) during the extratropical-cyclone(EC) stage, an order of magnitude larger than reported in previous studies.Composite analysis showed that positive interactions are characterized by a double-jet flow pattern, rather than the traditional trough pattern, because it is the jets that bring in large EFC from the upper-level environment to the TC center. The role of the outflow jet is also enhanced by relatively low inertial stability, as compared to the inflow jet. Among several environmental factors, it was found that extremely large EFC is usually accompanied by high inertial stability, low SST and strong vertical wind shear(VWS). Thus, the positive effect of EFC is cancelled by their negative effects. Only those samples during the EC stage, whose intensities were less dependent on VWS and the underlying SST, could survive in extremely large EFC environments, or even re-intensify. For classical TCs(not in the EC stage), it was found that environments with a moderate EFC value generally below ~25 m s^(-1)d^(-1) are more favorable for a TC's intensification than those with extremely large EFC. | Yu-Kun QIAN Chang-Xia LIANG Zhuojian YUAN Shiqiu PENG Junjie WU Sihua WANG | 2016 | Advances in Atmospheric Sciences2016，33，5： | 1 |
| 8 | Onthe mechanisms of the recurvature of super typhoon Megi显示文摘 | PENG SHIQIU QIAN YUKUN LAI ZHIJUAN 2014 | 2014 | Scientific Reports2014，4，12： | 1 |
| 9 | Does warmer China land attract more super typhoons?显示文摘 | XU XIANGDE PENG SHIQIU YANG XIANGJING 2013 | 2013 | Scientific Reports2013，3，： | 1 |
| 10 | Application of deep learning technique to the sea surface height prediction in the South China Sea显示文摘A deep-learning-based method,called ConvLSTMP3,is developed to predict the sea surface heights(SSHs).ConvLSTMP3 is data-driven by treating the SSH prediction problem as the one of extracting the spatial-temporal features of SSHs,in which the spatial features are“learned”by convolutional operations while the temporal features are tracked by long short term memory(LSTM).Trained by a reanalysis dataset of the South China Sea(SCS),ConvLSTMP3 is applied to the SSH prediction in a region of the SCS east off Vietnam coast featured with eddied and offshore currents in summer.Experimental results show that ConvLSTMP3 achieves a good prediction skill with a mean RMSE of 0.057 m and accuracy of 93.4%averaged over a 15-d prediction period.In particular,ConvLSTMP3 shows a better performance in predicting the temporal evolution of mesoscale eddies in the region than a full-dynamics ocean model.Given the much less computation in the prediction required by ConvLSTMP3,our study suggests that the deep learning technique is very useful and effective in the SSH prediction,and could be an alternative way in the operational prediction for ocean environments in the future. | Tao Song Ningsheng Han Yuhang Zhu Zhongwei Li Yineng Li Shaotian Li Shiqiu Peng | 2021 | Acta Oceanologica Sinica2021，40，7： | 1 |
| 11 | On the heat budget and water mass exchange in the Andaman Sea显示文摘The characteristics of the T/S structures,water mass exchange and deep circulation in the Andaman Sea are investigated based on the simulation from a high-resolution general circulation model(MITgcm).The results show that,below 1000 m,the water mass is saltier,warmer and more homogeneous in the Andaman Sea than that in the Bay of Bengal,attributing to the strong vertical mixing at the depth of^1800 m.The water mass exchange between the Andaman Sea and the Bay of Bengal goes through three major channels,which manifests itself as follows:the northern channel(Preparis Channel)is the main passage of water mass transport from the Bay of Bengal to the Andaman Sea,whereas the Middle Channel(the south of Andaman Islands and the north of Nicobar Islands)has an opposite transport;the southern channel(Great Channel)features with a four-layer water exchange which results in the least net transport among the three channels;all the transports through the three channels have an intra-annual variation with a period of half a year.At 1000-m depth,the entire Andaman Sea is occupied by a cyclonic circulation in January and July while by an anticyclonic one in April and October.The semiannual cycle found in both the deep circulation and water mass exchange is likely associated with the downwelling eastward-propagating Kelvin waves induced by the semiannual westerly component in the equatorial Indian Ocean during intermonsoon seasons. | Jiawen Liao Shiqiu Peng Xixi Wen | 2020 | Acta Oceanologica Sinica2020，39，7： | 0 |
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