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Linkage of the Decadal Variability of Extreme Summer Heat in North china with the IPOD since 1981

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Advances in Atmospheric Sciences 2023年第9期40卷 1617-1631页

作者： Tiejun XIE ji WANG Taichen FENG Ting DING Liang ZHAO Beijing Municipal Climate Center Beijing Meteorological BureauBeijing 100089China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 528478China national Climate Center China Meteorological AdministrationBeijing 100081China State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Extreme summer heat can have serious socioeconomic impacts in North ***,we explore the decadal variability of the number of extreme heat days in early-to-mid summer(June and July)and a related potential mechanism consistent with the major seasonal occurrence period of extreme heat events in North china(NCSH).Observational analyses show significant decadal variability in NCSH for 1981–2.2.,potentially linked to the Indo-Pacific warm pool and Northwest Pacific Ocean dipole(IPOD)in early-to-mid *** diagnostic analysis and the linear baroclinic model(LBM)show that the positive IPOD in early-to-mid summer can excite upward vertical wind anomalies in the South china-East china Sea region,shifting the position of the western Pacific subtropical high(WPSH)to the east or weakening the degree of its control of the South china-East china Sea region,thus generating a positive geopotential height quadrupole(EAWPQ)pattern in the East Asia-Northwest Pacific ***,the EAWPQ can cause air compression(expansion)over North china by regulating the tropospheric thickness anomalies in North china,thus increasing(decreasing)***,an empirical model that incorporates the linear trend can better simulate the decadal NCSH compared to an empirical model based solely on the IPOD index,suggesting that the decadal variability of NCSH may be a combined contribution of the decadal IPOD and external linear forcing.

关键词： extreme heat early-mid summer North china Indo-Pacific warm pool and Northwest Pacific Ocean dipole(IPOD) decadal variability

Projection of Heat Injury to Single-Cropping Rice in the Middle and Lower Reaches of the Yangtze River, china under Future Global Warming Scenarios

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Journal of meteorological Research 2019年第2期33卷 363-374页

作者： Xiaomin LYU Guangsheng ZHOU Mengzi ZHOU Li ZHOU Yuhe ji State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Collaborative Innovation Center on Forecast and Evaluation of meteorological Disasters Nanjing University of Information Science &Technology

Based on simulation results from the 16 CMIP5 model runs under three Representative Concentration Pathways(RCP2.6, RCP4.5, and RCP8.5) in combination with the recent five years of growth-stage data from agrometeorological observation stations in the middle and lower reaches of the Yangtze River, changes in heat injury and spatial distribution patterns of single-cropping rice in china during the early({2.–35), middle(2.46–65), and late(2.80–99) 2. st century were projected by using quantitative estimations. Relative to the reference period(1986–2.05), the occurrence probabilities of heat injury to single-cropping rice under different RCP scenarios increased significantly, showing a trend of mild > moderate > severe. The occurrence probabilities increased with time and predicted emissions, especially the average and maximum occurrence probabilities, which were ～48% and ～80%,respectively, in the late 2. st century under the RCP8.5 scenario. The spatial patterns of the occurrence probabilities at each level of heat injury to single-cropping rice did not change, remaining high in the middle planting region and low in the east. The high-value areas were mainly in central Anhui and southeastern Hubei provinces, and the areas extended to the northwest and northeast of the cultivation area over time. Under the RCP2.6, RCP4.5, and RCP8.5 scenarios, the total area of heat injury to single-cropping rice showed a significant linear increasing trend of 7.4 × 10~3, 19.9× 10~3, and 35.3 × 10~3 ha yr^(–1), respectively, from {2. to 2.99, and the areas of heat injury were greatest in the late2. st century, accounting for ～2.%, ～40%, and ～59% of the cultivation area.

关键词： projection single-cropping rice heat injury climate change china

Application of satellite thermal infrared remote sensing in monitoring magmatic activity of Changbaishan Tianchi volcano

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Chinese Science Bulletin 2010年第24期55卷 2731-2737页

作者： ji LingYun XU jianDong LIN XuDong LUAN Peng Institute of Geology China Earthquake Administration Beijing 100029 China The Second Crust Monitoring and Application Center China Earthquake Administration Xi'an 710054 China Chinese Academy of Land and Resource Economies Beijing 101149 China

In this paper, with the application of satellite thermal infrared remote sensing technique, nine land surface temperature distribution maps of Changbaishan Tianchi volcano area are retrieved from nine thermal infrared images which are taken from 1999 to 2.08. In terms of NDVI (Normalized Difference Vegetation Index), we classify the surface cover of the study area into three types, i.e. vegetation (forest), mixture of soil and vegetation (short grasses), and bare rock. The average temperature of each type of surface covers is calculated first, and then the average daily temperature record from Tianchi meteorological station is subtracted in order to reduce the effect of weather variation. Finally, thermal anomalies of three types of surface cover in Changbaishan Tianchi vol-cano area in the period of 1999 to 2.08 are obtained, which is believed to reflect the magmatic activity in the magma chamber under Tianchi volcano caldera. Our results indicate that temperature of the study area increased with an intermittent tendency during 1999 to 2.05, but dropped after 2.05, and then maintained a relatively stable state from 2.06 to 2.08. Such a tendency of annual temperature variation possibly caused by magmatic activity is correlated with the results observed by means of seismic monitoring, ground deformation from GPS measurement, and volcanic gas geochemistry monitoring in the same area. It is im-plied that the upward intrusion of magma may cause temperature increase, and such temperature variation is great enough so that could be detected by using satellite thermal infrared remote sensing technology.

关键词：卫星热红外遥感火山岩浆活动长白山天池遥感监测归一化植被指数应用表面平均温度天池火山区

Digital Problems and Strategies of Partial Revision in Overall Plan of Land Use

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Asian Agricultural Research 2010年第3期2卷 62-64页

作者： ZHENG Cai-gui,ZHANG Xiao-cheng,LI ji-zhuang,LIANG Qi-xue Chongqing Institute of Surveying and Planning for Land,Chongqing 40002.,{2.

The technical route of partial revision in overall plan of land use is briefly *** is pointed out that problems of area measuring in the technical route are mainly due to the digital *** digital problems of partial revision in overall plan of land use are presented as follows:the maps are not proofread before digitalization;the coordinate matching and projection transformation are not conducted on the maps;the information is asymmetrical pre and post the digitalization;the location lacks precision;the result maps are *** causes of these problems are analyzed,which cover the following *** lack of united management regulations;uneven working abilities of the staff in the compilation units;unawareness of the importance of map digilalization;poor basic conclitions of the original plan *** last,the relevant suggestions are put forward,for instance,releasing the national united management methods and technical criteria,establishing industrial admittance system and qualification system of complication units,setting up the mechanism of supervising digitalized results and controlling the quality,conducting coordinate matching and projection transformation and unifying the specification and mode of the results of maps so as to provide technical support for the overall plan of land use,play the micro-regulating role of land use and take a leading role in the sustainable development of social economy.

关键词： Overall plan of land use Technical specification D

A Modified Third-Order Semi-Discrete Central-Upwind Scheme for MHD Simulation

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Chinese Physics Letters 2011年第7期28卷 221-224页

作者： ji Zhen ZHOU Yu-Fen HOU Tian-Xiang State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of SciencesBeijing 100190 Graduate School Chinese Academy of SciencesBeijing 100049 china meteorological {2. Training centre Beijing 100081

The Kurganov scheme is a third-order semi-discrete central numerical *** high solution of the scheme is ensured by a piecewise quadratic non-oscillatory reconstruction which consists of the cell-average *** employ a modification of the smooth limiter of reconstruction in a simple *** modified limiter possesses rigorous positivity and the reformulation does not change the non-oscillatory property of *** order to explore the potential capability of application of the modified Kurganov scheme to magnetohydrodynamics(MHD)and resistive magnetohydrodynamics(RMHD)equations,two numerical problems are simulated in two dimensions(2.).These numerical simulations demonstrate that the modified Kurganov scheme keeps high precision and has stable reliable results for MHD and RMHD applications.

关键词： scheme oscillatory piecewise

The north-east North Atlantic Tripole implicated as a predictor of the August precipitation decadal variability over north china

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Frontiers of Earth Science 2023年第2期17卷 547-560页

作者： Tiejun XIE ji WANG Peiqun ZHANG Taichen FENG Xiaoxiao ZHANG Yingjuan ZHANG Beijing Municipal Climate Center Beijing Meteorological BureauBeijing 100089China national Climate Center China Meteorological AdministrationBeijing 100081China Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China

Monthly precipitation over north china in August(NCAP)is the second highest in the year,and it is important to understand its driving mechanisms to facilitate reliable *** NCAP displays a significant decadal variability of a cycle about 10-year and negatively correlates with the July north-east North Atlantic Tripole(NAT)over the decadal *** study shows that the Eurasian decadal teleconnection(EAT)acts as a bridge that links the July NAT with NCAP decadal *** coupled ocean–atmosphere bridge(COAB)mechanism,through which the July NAT influences the decadal variability of NCAP,can be summarized as *** cumulative effect of the NAT drives the EAT to adjust atmospheric circulation over north china and the surrounding regions,and so regulates precipitation in north china by influencing local water vapor *** the July NAT is in a negative(positive)phase,the EAT pattern has a positive(negative)pattern,which promotes(weakens)the transmission of water vapor from the sea in the south-east to north china,thus increasing(decreasing)NCAP over decadal *** decadal NCAP model established based on the July NAT can effectively predict the NCAP decadal variability,illustrating that the July NAT can be implicated as a predictor of the NCAP decadal variability.

关键词： north china August precipitation(NCAP) north-east North Atlantic Tripole(NAT) Eurasian decadal teleconnection(EAT)pattern coupled oceanicatmospheric bridge(COAB) decadal variability

Estimation of the Aircraft CO_2.Emissions of china's Civil Aviation during 1960-2.09

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Advances in Climate Change Research 2012年第2期3卷 99-105页

作者： HE ji-Cheng XU Yu-Qing Division of Environment and Resources Research Transport Planning and Research Institute Ministry of Transport Beijing 100028 China national Climate Center China Meteorological Administration Beijing 100081 China

Based on data collected by Chinese Civil Aviation Statistic Center, the annual CO2.emissions of aircrafts during 1960-2.09 were calculated, and the emission intensity and its dynamic characteristics were analyzed. The results show that the total CO2.emissions of aircrafts in china increased from 12.×10^3 t in 1960 to 41.44×10^6 t in 2.09. The CO2.emission intensity decreased from 2.9 kg （converted t kra）-1 in 1960 to 0.96 kg （converted t km）-1 in 2.09 at an average rate of 0.04 kg （converted t km）-I per year. The average share of CO2.emissions of aircrafts on the total CO2.emissions from the sector of transportation, storage and post was 6.6% during 1980-2.05, and 0.2.% on the total emissions from fossil fuel combustion during 1971-2.08.

关键词： china civil aviation energy consumption of aircraft C02.emissions

The coral grayness in northern South china Sea and its description of interdecadal variation of precipitation in south china

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Chinese Science Bulletin 2006年第B12期51卷 59-65页

作者： GU Dejun WANG Dongxiao SUN Donghuai GAO Rongzhen ji Zhongping Laboratory for Tropical Marine Environmental Dynamics South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Guangzhou Institute of Tropical and Marine Meteorology Key Open Laboratory for Tropical Monsoon China Meteorological Administration Guangzhou 510080 China Guangzhou Central meteorological Observatory Guangzhou 510080 China

The interdecadal variation of coral grayness in northern South china Sea (SCS) is studied using the annual mean coral grayness in northern SCS from 1789 to 1992.and annual precipitation at Guangzhou from 1908 to 1992.by Singular Spectrum Analysis (SSA), correlation analysis, Mann-Kendall’s abrupt change analysis and composite analysis. The interdecadal variation of south china precipitation as reflected by the series of Guangzhou precipitation rebuilt with the coral grayness is discussed. The results show that the variation of coral grayness in SCS has significant terms of tendency, much-weighted interdecadal variation and weak interannual variation. There was a century-scale abrupt change of coral grayness at the end of the 1880s that changed from positive anomalies to negative anomalies. The global field of SST difference corresponding to the point of abrupt change was negative anomalies over the SCS and neighboring northern Indian Ocean, most of central and western Pacific Ocean and coastal areas of the northern Atlantic Ocean. The large-scale distribution of SST anomalies is concomitant with the century-scale abrupt change of coral grayness in SCS. Negative correlation exists between the coralgrayness in SCS and precipitation in Guangzhou on the interdecadal scale and the interdecadal precipitation in Guangzhou as reflected by the interdecadaldata of SCS coral grayness shows that the interdecadal variation of south china precipitation changes significantly from phase to phase. The current study aims at contributing in the effort of identifying alternative indexes for climate change in south china on the interdecadal scale and beyond.

关键词：中国南海北部海域珊瑚变灰十年变异性华南年度降水气候变化

The terrestrial NPP simulations in china since Last Glacial Maximum

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Chinese Science Bulletin 2005年第18期50卷 2074-2079页

作者： HE Yong DAN Li DONG Wenjie ji jinjun QIN Dahe national Climate Center China Meteorological Administration Beijing 100081 China Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences. Beijing 100101 China

Based on Atmosphere-Vegetation Interaction Model (AVIM), the magnitude and spatial distribution of terrestrial net primary productivity (NPP) in china is simu-lated during three different geological eras, Last Glacial Maximum (LGM), Mid-Holocene (MH) and the present. The simulation shows that the glacial-interglacial variation of East Asian summer monsoon in china is the key factor af-fecting the NPP change. During the three eras, mean NPPs are 2.8 g/m2.a, 409 g/m2.a, and 355 g/m2.a. The total NPPs are 2.05 Pg/a, 3.89 Pg/a and 3.33 Pg/a, respectively. The ter-restrial NPP in china during warm-humid climate is larger than that during cold-arid eras, and the correlation analysis between NPP and climate factors suggests that temperature is the primary factor affecting the terrestrial NPP during 2. kaBP (LGM), and for 6 kaBP (MH) and the present the pri-mary factor is precipitation.

关键词：东亚地区季候风 AVIM 空间分布气候变化