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Another look at influences of the Madden‐Julian Oscillation on the wintertime East Asian weather

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Another look at influences of the Madden‐Julian Oscillation...

The noble gas isotope geochemical composition of chert at the bottom of Cambrian in Tarim Basin,china

第28届中国气象学会年会

作者： Jinhai He,1 Hai Lin,2 and Zhiwei Wu2 1department of Atmospheric sciences,Nanjing university of Information sciences and technology,Nanjing,china.2Meteorological research Division,environment Canada,Dorval,Quebec,Canada.

As one of the major predictability sources on an intraseasonal time scale,the Madden‐Julian Oscillation（MJO） exerts a profound influence on the subseasonal forecast of the East Asian（EA） surface air temperature（SAT） and *** this study we examine the direct link of the MJO with the EA SAT and precipitation and its dynamical *** represent the MJO,we perform an empirical orthogonal function（EOF） analysis on pentad outgoing longwave radiation（OLR） over（20°S-20°N,60°E-150°W）.The EOF1 mode is mostly characterized by a single convection center near the maritime continent（90°-150°E）,whereas the EOF2 mode has an east‐west dipole structure with enhanced convection over the eastern Indian ocean and suppressed convective activities over the tropical western *** the same pentad of a positive EOF1 phase,large areas of cold anomalies with reduced precipitation emerge in the EA region north of 20°N and persist through two pentads *** the same pentad of a positive EOF2 phase,SAT and precipitation exhibit a zonal dipole pattern with cold and dry anomalies covering the EA region west of 120°E and warm and wet anomalies to the *** dipole anomalies in SAT and precipitation systematically move eastward in the next two pentads.A linearized global primitive equation model is utilized to assess the cause of the intraseasonal variability in SAT and precipitation over East Asia associated with the tropical heating of the *** model responses to heating sources that mimic the EOF1 and EOF2 OLR patterns match well the general features of the observed circulation *** forcing of a positive phase of the EOF1 pattern,strengthened local Hadley cell or monsoon circulations within（90°E-150°E） are reproduced,with anomalous northerly winds and dry anomalies prevailing in the lower troposphere over East *** processes that influence East Asia are mainly associated with intraseasonal changes in local Hadley circulation and the Northern Hemisphere

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Science china earth sciences 2009年第S1期52卷 115-119页

作者： SUN ShengLi1,CHEN JianFa2,3,ZHENG JianJing4 & LIU WenHui4 1 Monitoring center for Marine Resource and environment,Guangdong ocean university,Zhanjiang 524088,china 2 department of Geochemistry,Changjiang university,Jingzhou 434023,china 3 College of Resource and Information,Petroleum university,Beijing 102249,china 4 Lanzhou Institute of Geology,Chinese Academy of sciences,Lanzhou 730000,china

In the Tarim Basin,black shale series at the bottom of Cambrian is one of the important marine facies hydrocarbon source rocks. This research focuses on the analysis of the isotope of noble gas of 11 cherts. The R/Ra ratio of chert in the Keping area is 0.032―0.319,and 40Ar/36Ar is 338―430. In Quruqtagh the R/Ra ratio is 0.44―10.21,and 40Ar/36Ar is 360―765. The R/Ra ratio of chert increases with 40Ar/36Ar from the west to the east accordingly. They have evolved from the crust source area to the mantle source area in a direct proportion. Surplus argon 40ArE in chert is in direct proportion to the R/Ra ratio,indicating that it has the same origin of excess argon as in fluid and mantle source helium. Comparison of the R/Ra ratios between the west and the east shows that the chert in the eastern part formed from the activity system of the bottom hydrothermal venting driven by the mantle source,where the material and energy of crust and mantle had a strong interaction in exchange;whereas in the western part,chert deposited from the floating of hydrothermal plume undersea bottom,which is far away from the centre of activities of the hydrothermal fluid of ocean bottom. In addition,from noble gas isotope composition of chert,it is suggested that the ocean anoxia incident happened at the black shale of the Cambrian bottom probably because of the large-scaled ocean volcanoes and the followinghydrothermal activities.

关键词： Tarim Basin Cambrian chert rare gas isotope

Conceptual model about the interaction between El Nio/ Southern Oscillation and Quasi-Biennial Oscillation in far west equatorial Pacific

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Science china earth sciences 2006年第8期49卷 889-896页

作者： LIU Qinyu1, LIU Zhengyu2,1 & PAN Aijun 1,3 1. Physical oceanography Lab. & Atmosphere-ocean Interaction and Climate Lab., ocean university of china, Qingdao 266003, china 2. center for Climate research, university of Wisconsin-Madison, Madison, WI 53706-1695, USA 3. environment and Dynamics Lab., Third Institute of oceanography, Xiamen 361005, china

Interaction between the Quasi-Biennial Oscillation in far west equatorialPacific (QBOWP) and the El Nino/Southern Oscillation (ENSO) is studied using a new conceptual *** this conceptual model, the QBOWP effects on ENSO are achieved through two ways: (1) the oceanicKelvin wave along equatorial Pacific, and (2) the Atmospheric Walker Circulation anomaly, while ENSOeffects on QBOWP can be accomplished by the atmospheric Walker Circulation anomaly. Diagnosisanalysis of the model results shows that the Atmospheric bridge (Walker circulation) plays a moreimportant role in interaction between the ENSO and QBOWP than the oceanic bridge (oceanic Kelvinwave along equatorial Pacific); It is found that by the interaction of the ENSO and QBOWP, a freeENSO oscillation with 3-5 years period could be substituted by a oscillation with the quasi-biennialperiod, and the dominant period of SST anomaly and wind anomaly in the far west equatorial Pacifictends to be prolonged with enhanced ENSO forcing. Generally, the multi-period variability in thecoupled Atmosphere-ocean System in the Tropical Pacific can be achieved through the interactionbetween ENSO and QBOWP.

关键词： El nino/southern oscillation quasi-biennial oscillation interaction coupled system kelvin wave walker circulation

Paleoceangraphic significance of redox-sensitive metals of black shales in the basal Lower Cambrian Niutitang Formation in Guizhou Province, South china

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Progress in Natural Science:Materials International 2004年第2期 56-61页

作者： YANG Jinghong, JIANG Shaoyong*, LING Hongfei, FENG Hongzhen, CHEN Yongquan and CHEN Jianhua(State Key Laboratory for Mineral Deposits research, department of earth sciences, Nanjing university, Nanjing 210093, china)

Black shales of the Lower Cambrian Niutitang Formation occur widely on the Yangtze Platform. In this study, we analyzed black shales from two sections (Zhongnan and Zhijin) in Guizhou Province. The redox-sensitive metal concentration and distribution of black shales from the two sections provide good evidence for the anoxic conditions of the basal Cambrian ocean on the Yangtze Platform. Our geochemical data suggest that the black shales from the Zhongnan section may have deposited in a more strongly anoxic environment than the black shales in the Zhijin section.

关键词： redox-sensitive metals black shales Early Cambrian Yangtze Platform South china.

Bioinspired design of integral molded Janus silk fibroin-MXene evaporator for efficient solar vapor generation

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Nano research 2024年第4期17卷 2824-2835页

作者： Ling-Qing Kong Zhi-cheng Zeng Guang-Zong Min Zhao-Hui Meng Guo-Qing Meng Xiao-Xiao Guo Nai-Bo Lin Xiang-Yang Liu The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Research Center of Biomedical Engineering of XiamenDepartment of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005China The State Key Laboratory of Marine environmental Science(MEL) College of Ocean and Earth SciencesXiamen UniversityXiamen 361005China

Solar vapor generation is a promising sustainable technology that uses solar distillation to produce fresh water from seawater and wastewater,helping relieve global water resource ***,inspired by naturally grown integrally molded mulberry leaves with a Janus hydrophilic and hydrophobic structure,a novel,simple,and efficient integrated molding method is proposed to break through the limitations of the traditional split manufacturing strategy and realizes the integrated formation of Janus *** on the spontaneous sedimentation characteristics of MXene in silk fibroin solution and its regulation of mesoscopic structure and hydrophilicity of silk fibroin,layered structures with different compositions and hydrophilicities were obtained in one ***,ethanol and glutaraldehyde were added to construct a physical crystallization-chemical crosslinking dual stabilization structure in silk *** evaporator has the evaporation rate of 3.07 kg·m^(-2)·h^(-1) and the efficiency of 86.8%under 1 sun and maintains high evaporation performance under various extreme test conditions including vigorous washing,repeated compression,and high-intensity ultraviolet(UV)***,the evaporator performs well in practical application scenarios,its evaporation rate in the simulated Dead Sea seawater exceeds 2.13 kg·m^(-2)·h^(-1),and more than 99.9%of the salt,heavy metal ions,oil pollution,and dyes are purified.

关键词： silk fibroin MXene bioinspired integrated molding Janus structure solar vapor generation

Simulation of sea surface temperature changes in the Middle Pliocene warm period and comparison with reconstructions

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Science Bulletin 2011年第9期56卷 892-901页

作者： YAN Qing1,2*, ZHANG ZhongShi3,1*, WANG HuiJun1,4, JIANG DaBang1,4,5 & ZHENG WeiPeng6 1 Nansen-Zhu International research Centre, Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 100029, china 2 Graduate university of Chinese Academy of sciences, Beijing 100049, china 3 Bjerknes Centre for Climate research, Uniresearch, Bergen N-5007, Norway 4 Climate Change research center, Chinese Academy of sciences, Beijing 100029, china 5 Key Laboratory of Regional Climate-environment research for Temperate East Asia, Chinese Academy of sciences, Beijing 100029, china 6 National Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 100029, china Nansen-Zhu International research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate university of Chinese Academy of sciences Beijing 100049 China Bjerknes Centre for Climate research UniResearch Bergen N-5007 Norway Climate Change research center Chinese Academy of Sciences Beijing 100029 China Key Laboratory of Regional Climate-environment research for Temperate East Asia Chinese Academy of Sciences Beijing 100029 China National Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The Middle Pliocene (ca 3.12–2.97 Ma) is a recent warm period in the earth’s history. In many respects, the warmth of the Middle Pliocene is similar to the probable warm situation of the late 21st century predicted by climate models. Understanding the Middle Pliocene climate is important in predicting the future climate with global warming. Here, we used the latest reconstructions for the Middle Pliocene—Pliocene research Interpretation and Synoptic Mapping (PRISM) version 3—to simulate the Middle Pliocene climate with a fully coupled model Fast ocean Atmosphere Model. From comparison of the results of simulations with reconstructions, we considered two important scientific topics of Middle Pliocene climate modeling: extreme warming in the subpolar North Atlantic and a permanent El Ni?o in the tropical Pacific. Our simulations illustrate that the global annual mean sea surface temperature (SST) in the Middle Pliocene was about 2.3°C higher than that in the pre-industrial era. The warming was stronger at midand high latitudes than at low latitudes. The simulated SST changes agree with SST reconstructions in PRISM3 data, especially for the North Atlantic, North Pacific and west coast of South America. However, there were still discrepancies between the simulation of the SST and reconstructions for the subpolar North Atlantic and tropical Pacific. In the case of the Atlantic, the weakened meridional overturning circulation in the simulation did not support the reconstruction of the extremely warm condition in the subpolar North Atlantic. In the case of the tropical Pacific, the whole ocean warmed, especially the eastern tropical Pacific, which did not support the permanent El Ni?o suggested by the reconstruction. From evaluation of the modeling and reconstruction, we suggest that the above discrepancies were due to uncertainties in reconstructions, difficulties in paleoclimate modeling and deficiencies of climate models. The discrepancies should be reduced through cons

关键词： Middle Pliocene sea surface temperature permanent El Ni?o numerical modeling extreme warming

Multiple equilibria of cross-equatorial Inertial jets

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Science china earth sciences 2007年第1期50卷 153-160页

作者： CHAO JiPing1,2 & LIU Fei3,4 1 National Marine environmental Forecasting center, Beijing 100081, china 2 The First Institute of oceanography ,SOA, Qingdao 266060, china 3 Key Laboratory Regional Climate-environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 100029, china 4 Graduate university of Chinese Academy of sciences, Beijing 100039, china National Marine environmental Forecasting center Beijing 100081 China The First Institute of oceanography SOA Qingdao 266060 China Key Laboratory Regional Climate-environment for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate university of Chinese Academy of sciences Beijing 100039 China

Based on the developed Anderson and Moore's theory about cross-equatorial inertial jets and a nonlinear equivalence shallow water model, new universal functions are determined by the characters of the vortical large-scale air flow (atmosphere) or ocean current (ocean) related to the jet, then the potential vorticity and energy conservation equations along the streamline in the cross-equatorial in-ertial jets can be obtained. Because the governing equations are nonlinear, some limited multiple equi-libria of cross-equatorial inertial jets may exist. According to the character of large-scale air flow or ocean current outside the jets, the existent criterion for multiple eqnilibria in cross-equatorial inertial jets is discussed, and two examples for multiple equilibia of nonlinear governing equations are given.

关键词： multiple equilibria cross-equatorial inertial jets the potential vorticity energy conservation.

从中国首台紫外-可见光高光谱卫星仪器反演得到的高空间分辨率臭氧廓线

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Engineering 2024年第1期32卷 106-115页

作者： Fei Zhao cheng Liu Qihou Hu Congzi Xia chengxin Zhang Wenjing Su department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China center for Excellence in Regional Atmospheric environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of environmental Optics and technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of ChinaHefei 230026China Anhui Province Key Laboratory of Polar environment and Global Change University of Science and Technology of ChinaHefei 230026China Greater Bay Area(GBA)Branch of Aerospace Information research Institute Chinese Academy of SciencesGuangzhou 510700China department of environmental Science and Engineering University of Science and Technology of ChinaHefei 230026China

Understanding the vertical distribution of ozone is crucial when assessing both its horizontal and vertical transport,as well as when analyzing the physical and chemical properties of the *** of the most effective ways to obtain high spatial resolution ozone profiles is through satellite *** environmental Trace Gases Monitoring Instrument(EMI)deployed on the Gaofen-5 satellite is the first Chinese ultraviolet-visible hyperspectral ***,retrieving ozone profiles using backscattered radiance values measured by the EMI is challenging due to unavailable measurement errors and a low signal-to-noise *** algorithm developed for the Tropospheric Monitoring Instrument did not allow us to retrieve 87%of the EMI ***,we developed an algorithm specific to the characteristics of the *** fitting residuals are smaller than 0.3%in most *** retrieved ozone profiles were in good agreement with ozonesonde data,with maximum mean biases of 20%at five latitude *** applying EMI averaging kernels to the ozonesonde profiles,the integrated stratospheric column ozone and tropospheric column ozone also showed excellent agreement with ozonesonde data,The lower layers(0-7.5 km)of the EMI ozone profiles reflected the seasonal variation in surface ozone derived from the china National environmental Monitoring center(CNEMC).However,the upper layers(9.7-16.7 km)of the ozone profiles show different trends,with the ozone peak occurring at an altitude of 9.7-16.7 km in March,2019.A stratospheric intrusion event in central china from August 11 to 15,2019,is captured using the EMI ozone profiles,potential vorticity data,and relative humidity *** increase in the CNEMC ozone co ncentration showed that downward transport enhanced surface ozone pollution.

关键词： Ozone profiles EMI Soft calibration Floor noise correction Stratospheric ozone intrusion

Strengthening of tropical Indian ocean teleconnection to the Northwest Pacific since the mid-1970s: An atmospheric GCM study

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Strengthening of tropical Indian Ocean teleconnection to the...