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Correlations between North Atlantic Oscillation Index in winter and eastern china Flood/Drought Index in summer in the last 530 years

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chinese Science Bulletin 2005年第21期50卷 2505-2516页

作者： FU Congbin & ZENG Zhaomei key laboratory of regional climate-environment for temperate east asia, Institute of Atmospheric Physics, chinese academy of sciences START regional Center for temperate east asia, beijing 10002., china key laboratory of regional climate-environment for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences START Regional Center for Temperate East Asia Beijing 100029 China

The time series of winter North Atlantic Oscil-lation Index (NAOI) in the period of 1429-1983 developed by Glueck and summer Flood/Drought Index (FDI) of eastern china in the period of 1470-1999 from 100 stations are used in this paper to study the potential impact of North Atlantic Oscillation on the climate in china. The analysis has ex-plored some significant lag correlations between FDI and NAOI. The maximum positive correlation coefficients be-tween NAOI and area-mean FDI in eastern and northern china lagging 2-3 years reach at 0.001 significance level, and while there are also negative correlation between NAOI and FDI in central and southern china at significance level of 0.05-0.01. The correlation between FDI and NAOI is time-dependent, i.e. the correlation coefficients between two indices vary from period to period. The highest correlation appeared in the period of 1636-1742, around the Little Ice Age, with the significant level of far above 0.001. The second significant period was from 1951 to 1999, at the level of 0.005-0.002. Both the power spectrum analysis and Morlet wavelet transformation have presented an interesting phe-nomenon: the area-mean FDIs in eastern and northern china share almost the same oscillation periods with NAOI in the inter-annual, decadal and centurial scales’ oscillations, i.e. 4-5, about 10, 20-30, around 50 and 80-100 years, etc. The Mann-Kendall Rank Statistic test reveals the significant trend and decadal abrupt changes in the series of area-mean FDIs in eastern and northern china in the past 530 years, while the NAOI in the past 400 years, did not show such trend at the significance level, but presented more frequent changes than those of FDI in china. This difference is per-haps due to the fact that the amplitude of the extremes of reconstructed NAOI series is less than that from instrumen-tal records.

关键词：中国洪水干旱气候变化大西洋振动系数

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Water-vapor source shift of Xinjiang region during the recent twenty years

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Progress in Natural Science:Materials International 2007年第5期17卷 569-575页

作者： Dai Xingang , Li Weijing , Ma Zhuguo and Wang Ping (key laboratory of regional climate-environment for temperate east asia, Institute of Atmospheric Physics, chinese academy of sciences, beijing 10002., china laboratory for climate Change, chinese Meteorological Administration, beijing 100081, china) [a]key laboratory of regional climate-environment for temperate east asia Institute of Atmospheric PhysicsChinese Academy of Sciences Beijing China [b]laboratory for climate Change chinese Meteorological Administration Beijing China

The aim of this paper is to investigate the climate water-vapor sources of Xinjiang region and their shifts during the past 20 years. First, the principle and steps are roughly regulated to seek the water-vapor sources. Second, the climate stationary water-vapor transport in troposphere is calculated to distinguish where the water vapor comes from by ERA-40 reanalysis. In addition, the collocation between the transport and the atmospheric column water vapor content is analyzed. The results show that the major vapor comes from the west side of Xinjiang for mid-month of seasons, apart from July while the water vapor comes from the north or northwest direction. The water vapor sources are different for different seasons, for example, the Caspian Sea and Mediterranean are the sources in January and April, the North Atlantic and the Arctic sea in July, and the Black Sea and Caspian Sea in October, respectively. In recent ten years more water vapor above Xinjiang comes from the high latitudes and the Arctic sea with global warming, and less from Mediterranean in comparison with the case of 1973—1986. In fact, the air over subtropics becomes dry and the anomalous water vapor transport direction turns to west or southwest during 1987—2000. By contrast, the air over middle and high latitudes is warmer and wetter than 14 years ago.

关键词： global warming water-vapor source water-vapor transport precipitable water Xinjiang climate inter-decadal change.

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Some evidence of drying trend over northern china from 1951 to 2004

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chinese Science Bulletin 2006年第23期51卷 2913-2925页

作者： MA Zhuguo1,2 & FU Congbin1,2 1. key laboratory of regional climate-environment for temperate east asia, chinese academy of sciences, beijing 10002., china 2. START regional Center for temperate east asia, Institute of Atmos-pheric Physics, chinese academy of sciences, beijing 10002., china key laboratory of regional climate-environment for temperate east asia Chinese Academy of Sciences Beijing 100029 China START regional Center for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The surface wetness index, Palmer drought sererity index and the retrieval of soil moisture over china were calculated using monthly precipitation and monthly mean surface air temperature. Based on the contrast analysis of the variation of the above three indices and precipitation, the dry/wet spatio-temporal pattern of northern china in the last 54 years was revealed, and the evidence of drying trend over northern china was analyzed, especially. The results show the following four facts: (1) The drying trend is the main characteristic of the eastern part of Northwest china and the central part of North china since the 1980s and it was enhanced in the last 15 years mainly due to the precipitation decrease and the temperature increase; (2) During the last 54 years, there was only one dry/wet shift at the interdecadal scale occurring in the eastern part of Northwest china and the central part of North china in the late 1970s, which was related to 1977/1978 global abrupt change, whereas there were three shifts in Northeast china, one was in the mid 1990s and the other two were in 1965 and 1983, respectively; (3) Unlike the variation trend of other subregions of northern china, the western part of Northwest china is currently located in a relatively wetting period, which is weak-ened due to the temperature increase; (4) The extreme drought frequency is obviously increasing in the eastern part of Northwest china, the central part of North china and Northeast china since the 1980s, which is closely related to the precipitation decrease and temperature increase in these subregions.

关键词：中国北方干燥趋向干旱索引气候背景

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Modeling the climate effects of different subregional uplifts within the Himalaya-Tibetan Plateau on asian summer monsoon evolution

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chinese Science Bulletin 2012年第35期57卷 4617-4626页

作者： ZHANG Ran 1,JIANG DaBang 1,2,3,LIU XiaoDong 4 & TIAN ZhiPing 2,5 1 climate Change research Center,chinese academy of sciences,beijing 10002.,china 2 Nansen-Zhu International research Centre,Institute of Atmospheric Physics,chinese academy of sciences,beijing 10002.,china 3 key laboratory of regional climate-environment research for temperate east asia,chinese academy of sciences,beijing 10002.,china 4 State key laboratory of Loess and Quaternary Geology,Institute of Earth environment,chinese academy of sciences,Xi’an 710075,china 5 Graduate University of chinese academy of sciences,beijing 100049,china 1. climate Change research Center Chinese Academy of Sciences Beijing 100029 China 2. Nansen-Zhu International research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China 3. key laboratory of regional climate-environment research for temperate east asia Chinese Academy of Sciences Beijing 100029 China 4. State key laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China 5. Graduate University of chinese academy of sciences Beijing 100049 China

Considering the different uplifting time of different subregions of the Himalaya-Tibetan Plateau(TP),a series of numerical simulations have been conducted with the Community Atmosphere Model(CAM4) developed at the National Center for Atmospheric research to explore the effects of the phased tectonic uplift of the Himalaya-TP on the evolution of asian summer *** results show that the uplifts of the Himalaya and northern TP significantly affect the evolutions of South asian summer monsoon and northern east asian summer monsoon *** is,the tectonic uplift of the Himalaya intensifies the South asian summer monsoon circulation and increases the precipitation in South asia,whereas the uplift of the northern TP intensifies the northern east asian summer monsoon circulation and increases the precipitation in northern east *** with previous simulations,current comparative analyses of modeling results for different subregional uplifts within the Himalaya-TP help deepen our understanding of the evolutionary history of asian monsoons.

关键词：青藏高原隆升喜马拉雅亚洲季风高原气候夏季季风次区域隆起演化建模

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Inertial theory of the mean Hadley circulation under the condition of nonstatic equilibrium

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Science china Earth sciences 2006年第5期49卷 546-553页

作者： CHAO Jiping1 & LIU Fei2,3 1. National Marine environmental Forecasting Center, beijing 100081, china 2. key laboratory regional climate-environment for temperate east asia, Institute of Atmospheric Physics, chinese academy of sciences, beijing 10002., china 3. Graduate University of chinese academy of sciences, beijing 100049, china 1. National Marine environmental Forecasting Center Beijing 100081 China 2. key laboratory regional climate-environment for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China 3. Graduate University of chinese academy of sciences Beijing 100049 China

Tropical atmosphere is divided into two layers, the layer near the ground is the planet boundary layer, where the motion is linear, if the radiation equilibrium temperature is given at the top of the boundary layer, the vertical motion there can be obtained. It is the non-viscous ideal atmos- pheric layer above the boundary one, where the motion is nonlinear. After getting the conservation laws of angular momentum, potential temperature and potential vortex, the inertial theory of the Hadley circulation driven by the vertical motion of the boundary layer is established, followed by sev- eral examples of its application.

关键词： Hadley circulation, inertial theory, conservation laws of angular momentum, potential temperature and potential vortex.

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regional soil moisture simulation for Shaanxi Province using SWAT model validation and trend analysis

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Science china Earth sciences 2010年第4期53卷 575-590页

作者： LI MingXing1,2,MA ZhuGuo1 & DU JiWen3 1 key laboratory of regional climate-environment research for temperate east asia,Institute of Atmospheric Physics,chinese academy of sciences,beijing 10002.,china 2 Graduate University of chinese academy of sciences,beijing 100049,china 3 Shaanxi Administration of Meteorology,Xi’an 710014,china 1. key laboratory of regional climate-environment research for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Shaanxi Administration of Meteorology Xi’an 710014 China

The soil moisture in Shaanxi Province,a region with complex topography,is simulated using the distributed hydrological model Soil Water Assessment Tool(SWAT).Comparison and contrast of modeled and observed soil moisture show that the SWAT model can reasonably simulate the long-term trend in soil moisture and the spatiotemporal variability of soil moisture in the *** to NCEP/NCAR and ERA40 reanalysis of soil moisture show that the trend of variability in soil moisture simulated by SWAT is more consistent with the *** model results suggested that high soil moisture in surface soil layers appears in the southern Shaanxi with high vegetation cover,and the Qinling mountainous region with frequent orographic *** deeper soil layers,high soil moisture appears in the river basins and *** regional soil moisture showed a generally decreasing trend on all soil layers from 1951 to 2004,with a stronger and significant decreasing trend in deeper soil layers,especially in the northern parts of the province.

关键词： SWAT soil moisture content simulation validation trend analysis

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Spatial patterns of ecosystem carbon residence time in chinese forests

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中国科学：地球科学英文版 2010年第8期53卷 1229-1240页

作者： ZHOU Tao1,2, SHI PeiJun1,2, JIA GenSuo3, LI XiuJuan1,2 & LUO YiQi4 1 State key laboratory of Earth Surface Processes and Resource Ecology, beijing Normal University, beijing 100875, china 2 academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs & Ministry of Education, beijing 100875, china 3 key laboratory of regional climate-environment research for temperate east asia, chinese academy of sciences, beijing 10002., china 4 Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA 1. State key laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing 100875 China2. Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs & Ministry of Education Beijing 100875 China3. Key Laboratory of Regional Climate-Environment Research for Temperate East Asia Chinese Academy of Sciences Beijing 100029 China4. Department of Botany and Microbiology University of Oklahoma Norman OK 73019 USA

Capacity of carbon sequestration in forest ecosystem largely depends on the trend of net primary production (NPP) and the length of ecosystem carbon residence time. Retrieving spatial patterns of ecosystem carbon residence time is important and necessary for accurately predicting regional carbon cycles in the future. In this study, a data-model fusion method that combined a process-based regional carbon model (TECO-R) with various ground-based ecosystem observations (NPP, biomass, and soil organic carbon) and auxiliary data sets (NDVI, meteorological data, and maps of vegetation and soil texture) was applied to estimate spatial patterns of ecosystem carbon residence time in chinese forests at steady state. In the data-model fusion, the genetic algorithm was used to estimate the optimal model parameters related with the ecosystem carbon residence time by minimizing total deviation between modeled and observed values. The results indicated that data-model fusion technology could effectively retrieve model parameters and simulate carbon cycling processes for chinese forest ecosystems. The estimated carbon residence times were highly heterogenous over china, with most of regions having values between 24 and 70 years. The deciduous needleleaf forest and the evergreen needleleaf forest had the highest averaged carbon residence times (73.8 and 71.3 years, respectively), the mixed forest and the deciduous broadleaf forest had moderate values (38.1 and 37.3 years, respectively), and the evergreen broadleaf forest had the lowest value (31.7 years). The averaged carbon residence time of forest ecosystems in china was 57.8 years.

关键词： carbon residence time carbon cycle forest ecosystem data-model fusion inverse modeling genetic algorithm

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Phosphorus release: A biogeochemical insight from a restored lakeside wetland in the Yangtze-Huaihe region, china

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Journal of environmental sciences 2010年第3期22卷 347-354页

作者： Xiaoling Zhou, Baoqing Shan, Hong Zhang State key laboratory of environmental Aquatic Chemistry, research Center for Eco-environmental sciences, chinese academy of sciences, beijing 100085, china. [a] State key laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The heavy intensification of agriculture in east china since the 1980s caused the decrease of lake area and water storage capacity with impediment of regulation, lake eutrophication and frequent floods. Many restoration projects have been conducted. However, the knowledge of biogeochemical factors that drive nutrient cycles during the early stage of restoration is still limited. We studied the effect of the remediation of a patch of near-shore shallow wetland on the northern bank of Chaohu Lake in the Yangtze-Huaihe region, china, which was used as rice paddy for many years, on the behavior of phosphorus. Redox potential （ORP）, temperature and dissolved oxygen were monitored in situ from May 2006 to November 2007. Samples of soil pore water were collected during this time for the determination of different forms of iron and phosphorus. ORP showed a clear transition of the wetland soil from an oxidized state in winter to a reduced state in summer. The decrease of ORP correlated with the release of large amounts of Fe and P. The maxima of total dissolved Fe and total dissolved P in the summer of the second year were （13.8 ± 6.8） mg/L and （0.88 ± 0.27） mg/L, respectively. It is worth noticing that P concentration far exceeded the critical value of lake eutrophication （0.02 mg/L）. The pressure of P release to the adjacent lake during the first two years of wetland restoration from rice fields should be taken into account by environmental policy makers.

关键词： wetland restoration phosphorus eutrophication redox potential iron

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Variations of δ^(18)O in precipitation from the Muztagata Glacier, east Pamirs

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Science china Earth sciences 2006年第1期49卷 36-42页

作者： LI Zhen1, YAO Tandong1,2, TIAN Lide1,2, XU Baiqing1,2 & Wu Guangjian2 1. key laboratory of Cryosphere and environment, Jointly Established by Cold and Arid Regions environmental and Engi-neering research Institute and Institute of Tibetan Plateau research, chinese academy of sciences and chinese academy of Meteorological sciences, china Meteorological Administration, CAS, Lanzhou 730000, china 2. laboratory of environment and Process on Tibetan Plateau, Institute of Tibetan Plateau research, chinese academy of sciences, beijing 100085, china 1. key laboratory of Cryosphere and environment Jointly Established by Cold and Arid Regions Environmental and Engineering Research Institute and Institute of Tibetan Plateau Research Chinese Academy of Sciences and Chinese Academy of Meteorological Sciences China Meteorological Administration Lanzhou 730000 China 2. laboratory of environment and Process on Tibetan Plateau Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China

Expeditions to Muztagata (in the eastern Pamirs) during the summer seasons of2002 and 2003 collected precipitation samples and measured their oxygen isotopes. The δ^(18)O inprecipitation displays a wide range, varying from -17.40per thousand to +1.33per thousand inJune—September 2002 and from -22.31per thousand to +4.59per thousand in May—August 2003. Theδ^(18)O in precipitation correlates with the initial temperature of precipitation during theobserving periods. The positive correlation between δ^(18)O and temperature suggests that δ^(18)Ocan be used as an indicator of temperature in this region. The δ^(18)O values in fresh-snow samplescollected from two snow events at different elevations on the Muztagata Glacier show a strong''altitude effect'', with a ratio of nearly -0.40per thousand per 100 m from 5500 m to 7450 m.

关键词： Muztagata, δ18O, temperature, altitude effect.

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Model study of the impact of heterogeneous reactions on mineral aerosol surfaces on tropospheric chemistry over east asia

Model study of the impact of heterogeneous reactions on mine...

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第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Jiawei Li and Zhiwei Han key laboratory of regional climate-environment research for temperate east-asia (RCE-TEA), Institute of Atmospheric Physics, chinese academy of sciences, beijing, china

Nine heterogeneous reactions （including uptake of H2O2, HNO3, HO2, N2O5, NO2, NO3, O3, OH and SO2 on mineral aerosol surfaces） are incorporated in a regional Air Quality Model System （RAQMS） to investigate the impacts of mineral aerosols on tropospheric chemistry in east asia during the dust storm period in March 2006. The model system shows a good ability in representing the behaviors of gaseous and aerosol species by comparison with observations. Most of the reaction probability γ values used for this study are the best estimation specifically for dust samples from deserts of china, derived from analysis of a number of recent laboratory studies. There are large variations in gas and aerosol concentrations while taking heterogeneous reactions on mineral aerosol surface into account, especially during dust storm events. The domain-averaged monthly mean percentage changes in SO2, NO2, O3, HNO3, NH3, total sulfate, total nitrate and total ammonium concentrations are -6.8%, -5.8%, -2.9%, -29.8%, 24.3%, 9.2%, 22.7%, -19.0%, respectively below 3 km. These changes indicate the considerable perturbation of heterogeneous reactions on mineral aerosol surface to tropospheric chemical system and components. The strength of heterogeneous reactions is determined by both reaction probability and gas precursor concentration. Among the nine reactions, the reactions involving HNO3, SO2, and N2O5 exert relatively large influences on the other chemical components, whereas the reactions regarding H2O2, HO2, and OH have little impacts.

关键词： Heterogeneous reaction Mineral aerosol Tropospheric chemistry Numerical simulation Dust storm

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