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Assessing satellite-derived net surface radiative flux in the Arctic

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Atmospheric and Oceanic Science Letters 2018年第2期11卷 209-217页

作者： SONG Mi-Rong liu ji-ping State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Department of Atmospheric and Environmental Sciences University at Albany State University of New YorkAlbanyNYUSA

Satellite-derived surface radiative fluxes have been recently improved and ***,the accuracy of recent satellite-derived surface radiative fluxes in the Arctic is not well ***,the authors assess the accuracy of the net surface radiative flux （NETSRF） in the Arctic,focusing on the ice-covered ocean,for three satellite products against four in situ measurements collected from different areas in the *** three satellite products are the Surface Radiation Budget project （SRB）,the International Satellite Cloud Climatology Project （ISCCP）,and the Extended AVHRR Polar Pathfinder version-2 （APP-x）.Our comparisons suggest that：（1） in terms of the overall bias,root-mean-square error,and correlation,the NETSRF of ISCCP is closer to in situ observations than that of SRB and APP-x;（2） in terms of the diurnal variation of the biases,it is not very clear which satellite product is superior to the others;and （3） in terms of the interannual variability of the bias,the NETSRF of ISCCP is more accurate than that of SRB and *** comparison may provide useful guidance to the community as to which data-set may provide the smallest bias in NETSRF

关键词： Arctic net surface radiation in situ measurement satelliteretrieval

Intercomparison of Surface Radiative Fluxes in the Arctic Ocean

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Atmospheric and Oceanic Science Letters 2013年第6期6卷 434-439页

作者： SHI Xiao-Xu liu ji-ping State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

Recent satellite data analysis has provided improved data sets relevant to the surface energy budget in the Arctic Ocean. In this paper, surface radiation properties in the Arctic Ocean obtained from the Surface Radiation Budget（SRB3.0） and the International Satellite Cloud Climatology Project（ISCCP-FD） during 1984– 2007 are analyzed and compared. Our analysis suggests that these datasets show encouraging agreement in basin-wide averaged seasonal cycle and spatial distribution of surface albedo; net surface shortwave and all-wave radiative fluxes; and shortwave, longwave, and all-wave cloud radiative forcings. However, a systematic large discrepancy is detected for the net surface longwave radiative flux between the two data sets at a magnitude of ~ 23 W m–2, which is primarily attributed to significant differences in surface temperature, particularly from April to June. Moreover, the largest difference in surface shortwave and all-wave cloud radiative forcings between the two data sets is apparent in early June at a magnitude of 30 W m–2.

关键词： Arctic Ocean surface albedo surface radiative flux cloud forcing

Nonlinear changes in cold spell and heat wave arising from Arctic sea-ice loss

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Advances in Climate Change Research 2021年第4期12卷 553-562页

作者： SONG Mi-Rong WANG Shao-Yin ZHU Zhu liu ji-ping Institute of Atmospheric Physics Chinese Academy of SciencesBeijing100029China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519000China School of Geospatial Engineering and Science Sun Yat-sen UniversityZhuhai519000China University Corporation for Polar Research Zhuhai519000China Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbany12222USA

Whether Arctic sea-ice loss has significant impacts on climate extremes in mid-and high-latitudes remains *** we show the full response of cold and warm extremes under two Arctic sea-ice loss scenarios utilizing a coupled global climate model that permits the air-sea *** results show that the amount of Arctic sea-ice loss determines the spatial extent and magnitude of the weakening of atmospheric circulation in mid-and high-latitudes of the northern hemisphere,leading to nonlinear changes in cold and warm extremes.A relatively localized and moderate weakening of atmospheric circulation induced by the projected sea-ice loss in the next two decades would contribute to less winter cold extremes over the Northern Hemispheric *** risks of winter cold spells would be dramatically reduced as the amount of sea-ice loss is increased to the ice-free *** contrast,as sea-ice loss increases,the continental regions would have increased risk of heat waves over all mid-and high-latitudes.

关键词： Arctic sea ice Cold and warm extremes Coupled climate model

Modeling turbulent heat fluxes over Arctic sea ice using a maximum-entropy-production approach

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Advances in Climate Change Research 2021年第4期12卷 517-526页

作者： ZHANG Yi-Ming SONG Mi-Rong DONG Chang-Ming liu ji-ping School of Marine Science Nanjing University of Information Science and TechnologyNanjing210044China LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519000China Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbanyNY12222USA

Recently,an algorithm of surface turbulent heat fluxes over snow/sea ice has been developed based on the theory of maximum entropy production(MEP),which is fundamentally different from the bulk flux algorithm(BF)that has been used in sea ice models for a few *** this study,we first assess how well the MEP algorithm captures the observed variations of turbulent heat fluxes over Arctic sea *** is found that the calculated heat fluxes by the MEP method are in good agreement with in-situ observations after considering the absorption of incoming radiation in a snow/ice surface layer with infinitesimal *** then investigate the effects of two different schemes(MEP ***)in the sea ice model of CICE6 on simulated turbulent heat fluxes and sea ice processes in the Arctic *** results show that the two different schemes give quite different representations of seasonal variations of heat fluxes,particularly for sensible heat fluxes in *** heat fluxes simulated by the MEP produce weak cooling effect on the ice surface in summer,whereas the BF generates a warming *** a result,compared to the BF,the MEP leads to a reduced seasonal cycle of Arctic sea ice mass flux by modulating snow-to-ice conversion,basal ice growth,surface ice melt and basal ice melt.

关键词： Sea ice modeling Turbulent heat fluxes Maximum-entropy-production Mass flux

Thermal Conductivity at the Interface of CHB_(r3)/NaCl Under Shock Compression

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Chinese Physics Letters 2001年第7期18卷 955-956页

作者： HU jin-Biao YANG jia-Ling liu ji-ping TAN Hua Institute of Solid Mechanics Beijing University of Aeronautics and AstronauticsBeijing 100083 Laboratory for Shock Wave and Detonation Physics Southwest Institute of Fluid PhysicsMianyang 621900 School of Chemical Industry and Material Science Beijing Institute of TechnologyBeijing 100081

A special experiment system has been proposed for studying the thermal physical property under shock *** optical radiation was recorded by a high time-resolution *** ratio α of sample and window materials under shock compression was studied by using this experiment *** thermal conductivity of CHB_(r3) calculated from α under shock compression is about 10^(3) times larger than that under normal condition.

关键词： technique. Conductivity thermal

基于CA原理的土地利用变化模拟模型对比研究

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吉林师范大学学报（自然科学版） 2024年第2期45卷 116-122页

作者：刘吉平王健翔张凤王小伦金晶吉林师范大学地理科学与旅游学院吉林四平136000

元胞自动机(Cellular Automata, CA)是当前模拟未来土地利用变化的主流方法之一,为土地利用变化研究提供了重要的载体.为了进一步深化对土地利用模拟模型的认识,以中国东北松嫩平原为研究区,采用多种基于CA原理的土地利用模拟模型,对该... 详细信息

元胞自动机(Cellular Automata, CA)是当前模拟未来土地利用变化的主流方法之一,为土地利用变化研究提供了重要的载体.为了进一步深化对土地利用模拟模型的认识,以中国东北松嫩平原为研究区,采用多种基于CA原理的土地利用模拟模型,对该地区2010年和2020年土地利用状况进行了模拟预测,并与实际土地利用状况进行对比分析.结果表明,PLUS模型精度指数最高,空间模拟效果最佳,而FLUS模型则在数量模拟上表现最佳,CA-Markov模型整体表现均不如前两者.PLUS模型和FLUS模型更适宜做松嫩平原的土地利用变化研究.

关键词：元胞自动机土地利用 FLUS模型 PLUS模型 CA-Markov模型松嫩平原

热水浴法解除蚕卵滞育的条件优化及应用效果分析

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南方农业学报 2024年第1期55卷 280-289页

作者：孙溱博廖森泰杨琼刘吉平肖阳李庆荣邢东旭广东省农业科学院蚕业与农产品加工研究所广东广州510610 华南农业大学动物科学学院广东广州510642

【目的】通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件,并测试以不同来源水处理蚕种的孵化效果,为热水浴法在蚕业生产中的推广应用提供科学依据,探索出可替代传统盐酸孵化法且更安全环保、成本低廉的蚕种人工孵化方法。【... 详细信息

【目的】通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件,并测试以不同来源水处理蚕种的孵化效果,为热水浴法在蚕业生产中的推广应用提供科学依据,探索出可替代传统盐酸孵化法且更安全环保、成本低廉的蚕种人工孵化方法。【方法】选用两广二号为供试蚕种,以卵龄(A)、处理时间(B)和处理温度(C)为变量,以蚕卵实用孵化率(Y)为响应值,通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件;选择自来水、纯净水及矿泉水等不同来源的水,并选取萨尼斯、932、湘晖和春5等4个蚕种品种,分别采用优化后的条件对蚕卵进行热水浴处理,检验热水浴法解除蚕卵滞育的效果。【结果】蚕卵实用孵化率对3个变量因素的二项式拟合方程为:Y=91.03-2.01A-4.60B+22.89C+0.040AB+4.03AC+0.89BC-10.46A~2+3.25B~2-19.60C~2,响应面设计模型拟合程度较好。各因素对蚕卵实用孵化率的影响排序为处理温度(C)>处理时间(B)>卵龄(A),其中,处理温度影响极显著(P0.05,下同);两因素间交互作用对蚕卵实用孵化率的影响排序为AC>BC>AB。修正后的热水浴法最佳处理条件:卵龄17.5 h,处理时间13 s,处理温度50℃,此条件下的实际蚕卵实用孵化率为97.94%,与理论预测值(98.81%)接近。不同来源水对两广二号正、反交种进行热水浴处理后的实用孵化率均在95.00%以上,仅阳山自来水和纯净水1在热水浴处理两广二号正交种时的实用孵化率显著低于盐酸即时浸酸法,但其实用孵化率仍高于93.00%;萨尼斯、932、湘晖、春5等4个家蚕品种的热水浴实用孵化率与盐酸即时浸酸法相比均无显著差异,表明热水浴法具有较强的普适性。【结论】热水浴法能有效解除蚕卵滞育,具有较强的普适性,且成本低廉、操作简单,可作为蚕业生产上替代传统盐酸孵化法的新方法。

关键词：热水浴法二化性家蚕品种蚕卵解除滞育人工孵化响应面优化

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Associations between the Autumn Arctic Sea Ice and North American Winter Precipitation

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Atmospheric and Oceanic Science Letters 2012年第3期5卷 212-218页

作者： SONG Mi-Rong liu ji-ping liu Hai-Long REN Xiao-Bo WANG Xiu-Cheng State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Meteorological Center Northwest Regional Air Traffic Management Bureau of Civil Aviation of China Xi＇an 710082 China

Associations between the autumn Arctic sea ice concentrations (SICs) and North American winter precipitation were examined using singular value decomposition. The results show that a reduced SIC in the majority of the Arctic is accompanied by dry conditions over the Great Plains, the southern United States, Mexico, eastern Alaska, and southeastern Greenland, and by wet conditions over the majority of Canada, the northeastern United States, and the majority of Greenland. Atmospheric circulation anomalies associated with the SIC variability show a wave train structure that is persistent from autumn to winter and is responsible for the covariability between the autumn Arctic SICs and North American winter precipitation. This relationship suggests a potential long-term outlook for the North American winter precipitation.

关键词： Arctic sea ice North American precipitation singular value decomposition

Isocyanide-Based One-Pot Cascade Synthesis of 3-Acyl Isoindolinones

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Chinese Journal of Chemistry 2024年第3期42卷 259-263页

作者： jia liu Yi-Ming Zhu Xiao-ping Xu Shun-Jun ji Key Laboratory of Organic Synthesis of jiangsu Province College of ChemistryChemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouJiangsu215123 China Suzhou Baolidi Functional Materials Research Institute SuzhouJiangsu215144 China

A series of 3-acyl-substituted isoindolinone derivatives were synthesized in a one-pot manner via the reaction of o-bromobenzaldehydes,isocyanides,and carboxylic acids in the presence of palladium catalyst and base. The reaction employing easily available starting materials features simple operation and high efficiency. The mechanistic study showed that the reaction might undergo 1) Pd-catalyzed [3+2] cyclization of o-bromobenzaldehyde with isocyanide and the re-insertion of another molecule of isocyanide,2) addition of carboxylic acid to in situ formed ketenimine followed by a rearrangement relay to give 3,3-diacyl-substituted isoindolinone derivative. Further transformations of the obtained products through decarbonylation could also be realized.

关键词： One-pot reaction Isocyanide Pd catalysis Rearrangement reaction Isoindolinone