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青藏高原—印度洋热力差对南亚季风活动的多尺度影响

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大气科学 2024年第1期48卷 147-159页

作者：肖子牛李张群中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点室验室北京100029

海陆热力差异是季风形成和演变的根本驱动力,青藏高原与印度洋热力差异是影响南亚季风活动的重要因素。本文围绕次季节、季节、年际和年代际等不同时间尺度上青藏高原与印度洋的热力差异对南亚季风活动的影响,回顾和总结了相关研究成果... 详细信息

海陆热力差异是季风形成和演变的根本驱动力,青藏高原与印度洋热力差异是影响南亚季风活动的重要因素。本文围绕次季节、季节、年际和年代际等不同时间尺度上青藏高原与印度洋的热力差异对南亚季风活动的影响,回顾和总结了相关研究成果。在次季节尺度上,主要聚焦在两者的热力差异对南亚季风爆发的影响;在年际尺度上,着重阐释了其对南亚季风强度年际变化的指示意义;在年代际尺度上,考察了热力差异和南亚季风降水关系的年代际变化。同时,本文对该领域一些需要进一步研究的问题进行了讨论。

关键词：热力差异南亚季风多时间尺度季风降水青藏高原印度洋

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Ascending phase of solar cycle 25 tilts the current El Nino-Southern oscillation transition

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Atmospheric and Oceanic Science Letters 2024年第1期17卷 34-38页

作者： Wenjuan Huo ziniu xiao Liang Zhao Fei Liu GEOMAR Helmholtz Centre for Ocean Research KielGermany State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina School of Atmospheric Sciences Sun Yat-Sen UniversityKey Laboratory of Tropical Atmosphere–Ocean SystemMinistry of Educationand Southern Marine Science and Engineering Guangdong LaboratoryZhuhaiChina

关键词：厄尔尼诺-南方涛动太阳活动热带太平洋位相转变预测三重拉尼娜现象

基于青藏高原和印度洋区域热力状况的气候预测先兆信号

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气候与环境研究 2024年第2期29卷 216-228页

作者：肖子牛李张群赵亮陈红冯蓉中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点室验室北京100029 中国科学院大气物理研究所国际气候与环境科学中心北京100029

围绕青藏高原和印度洋区域热力状况对南亚季风、水汽输送和区域气候的影响,本文梳理总结了相关研究进展,重点聚焦在青藏高原和印度洋区域热力状况和热力差异与季风活动、水汽输送等重要气候指标的联系,并据此提出了印度洋和高原区域在... 详细信息

围绕青藏高原和印度洋区域热力状况对南亚季风、水汽输送和区域气候的影响,本文梳理总结了相关研究进展,重点聚焦在青藏高原和印度洋区域热力状况和热力差异与季风活动、水汽输送等重要气候指标的联系,并据此提出了印度洋和高原区域在次季节、季节尺度的气候预测指标和方法。对认识青藏高原和印度洋区域热力状况对气候的影响,改善该区域气候预测的能力具有参考意义。

关键词：青藏高原印度洋热力状况南亚季风气候预测

Polar WRF *** and evaluation for the Antarctic and Southern Ocean

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Frontiers of Earth Science 2022年第4期16卷 1005-1024页

作者： Jianjun XUE ziniu xiao David H.BROMWICH Lesheng BAI State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Polar Meteorology Group Byrd Polar and Climate Research CenterThe Ohio State UniversityColumbus OH 43210USA China Meteorological Administration Training Centre Beijing 100081China

A recent version of the Polar Weather Research and Forecasting model(Polar WRF)has been upgraded to the version 4.X era with an improved NoahMP Land Surface Model(LSM).To assess the model performance over the Antarctic and Southern Ocean,downscaling simulations with different LSM(NoahMP,Noah),WRF versions(Polar WRF 4.1.1 and earlier version 4.0.3,WRF 4.1.1),and driving data(ERA-Interim,ERA5)are examined with two simulation modes:the short-term that consists of a series of 48 h segments initialized daily at 0000 UTC with the first 24 h selected for model spin-up,whereas the long-term component used to evaluate long-term prediction consists of a series of 38-41 day segments initialized using the first 10 days for spin-up of the hydrological cycle and planetary boundary layer *** using short-term mode driven by ERA-Interim with NoahMP and Noah are selected for benchmark *** results show that Polar WRF 4.1.1 has good skills over the Antarctic and Southern Ocean and better performance than earlier *** reduced downward shortwave radiation bias released with WRF 4.1.1 performed well with *** NoahMP and Noah led to very similar conclusions,NoahMP is slightly better than Noah,particularly for the 2 m temperature and surface radiation because the minimum albedo is set at 0.8 over the ice ***,a suitable nudging setting plays an important role in long-term forecasts,such as reducing the surface temperature diurnal cycle near the *** characteristics investigated in this study provide a benchmark to improve the model and guidance for further application of Polar WRF in the Antarctic.

关键词： Polar WRF downscaling simulation performance evaluation the Antarctic and Southern Ocean

The Warm Arctic-Cold Eurasia Pattern and Its Key Region in Winter in CMIP6 Model Simulations

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Advances in Atmospheric Sciences 2023年第12期40卷 2138-2153,I0002-I0006页

作者： Liang ZHAO Yunwen LIU Yihui DING Qingquan LI Wei DONG Xinyong SHEN Wei CHENG Haoxin YAO ziniu xiao State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Neijiang Meteorological Bureau Neijiang 641000China China Meteorological Administration National Climate CenterBeijing 100081China Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province School of Earth SciencesZhejiang UniversityHangzhou 310058China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Beijing Institute of the Applied Meteorology Beijing 100029China

An enhanced Warm Arctic-Cold Eurasia(WACE)pattern has been a notable feature in recent winters of the Northern ***,divergent results between model and observational studies of the WACE still *** study evaluates the performance of 39 climate models participating in the Coupled Model Intercomparison Project Phase 6(CMIP6)in simulating the WACE pattern in winter of 1980-2014 and explores the key factors causing the differences in the simulation capability among the *** results show that the multimodel ensemble(MME)can better simulate the spatial distribution of the WACE pattern than most single *** that can/cannot simulate both the climatology and the standard deviation of the Eurasian winter surface air temperature well,especially the latter,usually can/cannot simulate the WACE pattern *** mainly results from the different abilities of the models to simulate the range and intensity of the warm anomaly in the Barents Sea-Kara seas(BKS)*** analysis shows that a good performance of the models in the BKS area is usually related to their ability to simulate location and persistence of Ural blocking(UB),which can transport heat to the BKS region,causing the warm Arctic,and strengthen the westerly trough downstream,cooling central ***,simulation of UB is key and significantly affects the model’s performance in simulating the WACE.

关键词： warm Arctic-cold Eurasia pattern Arctic amplification CMIP6 simulation evaluation extreme climate blocking highs

Impact of the Kuroshio Extension Oceanic Front on Autumn and Winter Surface Air Temperatures over North America

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Journal of Ocean University of China 2018年第4期17卷 713-720页

作者： YUAN Li xiao ziniu Chinese Academy of Meteorological Sciences Beijing 100081China State Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Chifeng Meteorelogical Service of Inner Mongolia Inner MongoliaChifeng 024000China

Mid-latitude air-sea interaction is an important topic that attracts a considerable amount of research interest. The Kuroshio Extension(KE) is one of the main western boundary currents and plays a critical role in the mid-latitude atmospheric circulation. This paper uses the NCEP/NCAR reanalysis and Hadley sea surface temperature datasets to investigate the influence of oceanic fronts in the KE region on surface air temperature in North America over the period 1949–2014. A significant correlation was found between the KE front intensity and the temperatures over North America in autumn and winter. A strong(weak) KE front anomaly in autumn is associated with an increasing(decreasing) surface temperature over western North America but a decreasing(increasing) surface temperature over eastern North America. In winter, central North America warms(cools) when the KE front is strong(weak). The response of the atmospheric circulation, including wind in the high and low troposphere, troughs, and ridges, to the strengthening(weakening) of the KE front is the main cause of these changes in surface temperature.

关键词： Kuroshio extension surface air temperature North America

The behavior of deep convective clouds over the warm pool and connection to the Walker circulation

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Science China Earth Sciences 2018年第11期61卷 1605-1621页

作者： Wenjing SHI ziniu xiao Yufei AI Beijing Institute of Applied Meteorology Beijing 100029 China Beijing Goldwind Science & Creation Windpower Equipment Co. Ltd. Xinjiang Goldwind Science & Technology Co. Ltd. Beijing 100176 China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beijing 100871 China

As the deep convective clouds(DCCs) over the western Pacific and Indian Ocean warm pool may play different roles in the climate system, variations in DCC properties over these two sectors are investigated and compared. The DCC intensity and area varies more significantly in the Indian Ocean than the western Pacific sector, while the DCC frequency is comparable in both sectors at the seasonal scale. Although the Indian Ocean sector is strongly dominated by the seasonal evolution, the interannual variations in the two sectors are comparable for all three DCC properties(frequency, intensity, and area). Besides,Walker circulation is closely correlated with the interannual variability of DCCs in both sectors. The Walker circulation strengthens(weakens) as the DCCs shift eastward(westward) over the Indian Ocean sector and westward(eastward) over the western Pacific sector. When more or stronger DCCs occur over the Indian Ocean sector(western Pacific sector), the Walker circulation becomes stronger(weaker) and shifts westward(eastward). Interestingly, the response of the Walker circulation to DCC variability over the warm pool is asymmetry. The asymmetry response of the Walker circulation to the negative and positive DCC anomaly may be related to the non-linearity internal variability of the atmosphere. DCCs over the Indian Ocean sector have a much weaker nonlinear correlation with the Walker circulation than DCCs over the western Pacific sector.

关键词： Satellite data Deep convective clouds Asymmetry response Walker circulation

In-situ construction of Co(OH)_(2) nanoparticles decorated biochar for highly efficient degradation of tetracycline hydrochloride via peracetic acid activation

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中国化学快报:英文版 2023年第9期34卷 264-269页

作者： Fengbin Sun Xudong Yang Feng Shao Fan Li Zhicheng Pan Lin Qiao ziniu xiao Wen Liu Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China College of Landscape Architecture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province Haitian Water GroupChengdu 610299China

Peracetic acid(CH_(3)C(O)OOH,PAA)-based heterogeneous advanced oxidation process(AOP)has attacked intensive interests due to production of various reactive ***,Co(OH)_(2)nanoparticles decorated biochar(Co(OH)_(2)/BC)was fabricated by a simple and controllable method,which was used to degrade tetracycline hydrochloride(TTCH)in water through PAA *** results indicated that 100%TTCH(C_(0)=10μmol/L)degradation efficiency was realized within 7 min at pH 7,with a high kinetic rate constant(k_(1))of 0.64 min^(-1)by the optimized Co(OH)_(2)/*** characterizations suggested that Co(OH)_(2)nanoparticle was successfully decorated on biochar,leading to more active sites and electronic structure alteration of biochar,thus greatly promoting the catalytic cleavage of PAA for radicals ***,the reactive oxygen species(ROS)quenching experiments and electron paramagnetic resonance(EPR)analysis demonstrated the key species were alkoxyl radicals(R–O^(·),mainly CH_(3)CO_(2)^(·)and CH_(3)CO_(3)^(·)),HO^(·)and^(1)O_(2)in this ***,density functional theory(DFT)calculation on Fukui index further revealed that the vulnerable sites of TTCH and three possible degradation pathways were *** study can provide a new strategy for synthesis functional materials in PAA activation AOPs for removal of antibiotics in water.

关键词： Biochar Peracetic acid(PAA) Tetracycline hydrochloride Intermediates DFT calculation

Improving energetics in an ideal baroclinic instability case with a Physical Conserving Fidelity model

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Frontiers of Earth Science 2013年第3期7卷 341-350页

作者： Qi ZHONG Qing ZHONG ziniu xiao China Meteorological Administration Training Centre Beijing 100081 China Institute of Atmospheric Physics Chinese Academy of sciences Beijing 100029 China

To improve the energetics in the life cycle of an ideal baroclinic instability case, we develop a Physical Conserving Fidelity model （F-model）, and we compare the simulations from the F-model to those of the traditional global spectral semi-implicit model （control model）. The results for spectral kinetic energy and its budget indicate different performances at smaller scales in the two models. A two-way energy flow emerges in the generation and rapid growth stage of the baroclinic disturbance in the F-model. However, only a downscale mechanism dominates in the control model. In the F-model, the meso- and smaller scales are energized initially, and then an active upscale nonlinear cascade occurs. Thus, disturbances at prior scales are forced by both downscale and upscale energy cascades and by conversion from potential energy. An analysis of the eddy kinetic energy budget also shows remarkable enhancement of the energy conversion rate in the F-model. As a result, characteristics of the ideal baroclinic wave are greatly improved in the F-model, in terms of both intensity and time of formation.

关键词： energy conversion energy cascade ideal baroclinic instability high order total energy conservation time-split scheme