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A high-precision hydrodynamic model coupled with the hydrological habitat suitability model to reveal estuarine vegetation distribution

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Journal of Hydrodynamics 2022年第3期34卷 451-466页

作者： Qiao-feng Ma Shu-xiu Liang Zhao-chen Sun Wen-hao Hou Xin-yue Hu Rui-jin Zhang State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116024China School of Marine Science and Environment Engineering Dalian Ocean UniversityDalian116023China Operational Oceanographic Institution Dalian Ocean UniversityDalian116023China

In this paper,based on the finite volume method,a high-precision hydrodynamic model coupled with the habitat suitability model is established,and the computational efficiency of the coupled model is improved by a graphics processing unit(GPU)-accelerated *** coupled model is used to solve the problem of the non-conservation of mass that may be caused by the nearshore hydrodynamic model in the processing of wetting and drying,while avoiding the unphysical high velocities at the wetting and drying *** coupled model is applied to simulate the high-precision hydrodynamic process of the Liao River estuary(LRE)and the hydrological habitat suitability of the estuarine vegetation(Suaeda heteroptera)growing in the *** simulated values of the hydrological variables(the water level,the water depth,the current velocity and direction)are highly consistent with the measured *** root mean square errors(RMSE)of the hydrological variables are 0.10m,0.12m/s and 17.24°,***,the simulated combined suitability index(CSI)distribution of Suaeda heteroptera(***)matches with the distribution of *** obtained from the high-resolution remote sensing satellite images during the same time *** ratio of the simulated weighted usable area(WUA)of *** to the area obtained from the remote sensing satellite images during the same period is 81.9%.This study reveals the phenomenon that the distribution of *** in the LRE is highly correlated with the high-precision hydrodynamic processes,and provides a scientific basis and a valuable reference for the conservation and the restoration of the estuarine vegetation.

关键词： High-precision hydrodynamic model habitat suitability model conversation of mass weighted usable area vegetation distribution

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Changes in Global vegetation distribution and Carbon Fluxes in Response to Global Warming:Simulated Results from IAP-DGVM in CAS-ESM2

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Advances in Atmospheric Sciences 2022年第8期39卷 1285-1298,I0002-I0010页

作者： Xiaofei GAO Jiawen ZHU Xiaodong ZENG Minghua ZHANG Yongjiu DAI Duoying JI He ZHANG International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China School of Marine and Atmospheric Sciences Stony Brook UniversityNY 11790USA School of Atmospheric Sciences Sun Yat-Sen UniversityGuangzhou 510275China College of Global Change and Earth System Science Beijing Normal UniversityBeijing 100875China

Terrestrial ecosystems are an important part of Earth systems,and they are undergoing remarkable changes in response to global *** study investigates the response of the terrestrial vegetation distribution and carbon fluxes to global warming by using the new dynamic global vegetation model in the second version of the Chinese Academy of Sciences(CAS)Earth System Model(CAS-ESM2).We conducted two sets of simulations,a present-day simulation and a future simulation,which were forced by the present-day climate during 1981-2000 and the future climate during 2081-2100,respectively,as derived from RCP8.5 outputs in ***_(2)concentration is kept constant in all simulations to isolate CO_(2)-fertilization *** results show an overall increase in vegetation coverage in response to global warming,which is the net result of the greening in the mid-high latitudes and the browning in the *** results also show an enhancement in carbon fluxes in response to global warming,including gross primary productivity,net primary productivity,and autotrophic *** found that the changes in vegetation coverage were significantly correlated with changes in surface air temperature,reflecting the dominant role of temperature,while the changes in carbon fluxes were caused by the combined effects of leaf area index,temperature,and *** study applies the CAS-ESM2 to investigate the response of terrestrial ecosystems to climate *** though the interpretation of the results is limited by isolating CO_(2)-fertilization effects,this application is still beneficial for adding to our understanding of vegetation processes and to further improve upon model parameterizations.

关键词： global warming vegetation distribution carbon flux leaf area index surface air temperature

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vegetation distribution on Tibetan Plateau under Climate Change Scenario

Vegetation Distribution on Tibetan Plateau under Climate Cha...

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地理学核心问题与主线——中国地理学会2011年学术年会暨中国科学院新疆生态与地理研究所建所五十年庆典

作者： Zhao Dongsheng Wu Shaohong Yin Yunhe Yin ZhiYong (1 Institute of Geographical Sciences and Natural Resources Research,CAS,Beijing,100101 2 Institute of Tibetan Plateau Research,CAS,Beijing,100085 3 Marine Science and Environmental Studies,University of San Diego,San Diego,CA,92110,USA)

The impact of climate change on distribution of vegetation is an important aspect in studies on the responses of ecosystems to the climate *** in the sensitive environments of the Tibetan Plateau, vegetation distribution may be significantly affected by climate *** this research,the coupled biogeography and biogeochemistry model,BIOME4,was modified according to the features of vegetation distribution on the Plateau,and the Kappa statistic was used to evaluate the modeling results by comparing the simulated vegetation distribution with the existing 1:1,000,000 vegetation map of *** comparison showed that modified model was appropriate for simulating the overall vegetation distribution on the *** the improved BIOME4 model,possible changes in the vegetation distribution were simulated under climate change *** simulated results suggest that alpine meadows,steppes,and alpine sparse/ cushion vegetation and deserts would shrink,while shrubs,broad-leaved forests,coniferous-broadleaved mixed forests,and coniferous forests would *** these types,shrubs,alpine meadows and steppes would change the *** shrubs vegetation would expand toward the northwest,replacing most alpine meadows and part of steppes,and thus causing their *** broad-leaved forests and coniferous-broadleaved mixed forests demonstrated smaller changes in their distributions. For all the forest types,the area of coniferous forests would increase the most by spreading to the interior of the Plateau.

关键词： vegetation distribution BIOME4 model Tibetan Plateau responses of vegetation to climate change

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Evaluating the performance of CMIP6 Earth system models in simulating global vegetation structure and distribution

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Advances in Climate Change Research 2021年第6期12卷 584-595页

作者： SONG Xiang WANG Dan-Yun LI Fang ZENG Xiao-Dong International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing100049China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing210044China

Evaluation of vegetation structure and distribution simulations in Earth system models(ESMs)is the basis for understanding historical reconstruction and future projection of changes in terrestrial ecosystems,carbon cycle,and climate based on these *** assessments can also provide important information of models'merits and shortcomings or systematic biases,and so clues for model *** structure and distribution in ESMs are primarily characterized by three variables:leaf area index(LAI),tree height,and fractional coverage of plant functional type(PFT).However,for the ongoing Coupled Model Intercomparison Project Phase 6(CMIP6),only temporal variabilities of global-averaged LAI time series were evaluated,others remain largely *** study systematically investigates the spatial and/or temporal variability of the three critical variables from 27 ESMs in CMIP6 using satellite *** results show that all models and the multi-model ensemble mean(MME)can generally reproduce the observed LAI spatial pattern but all of them overestimate the global mean LAI mainly due to overestimation of LAI in non-forested vegetated *** CMIP6 models fail to capture the temporal variability in the annual LAI because of large biases in both the simulated trend magnitude and temporal pattern of interannual *** average LAI seasonal cycles in different latitude zones are roughly reproduced by the models,but 1-2 months delays in the LAI peak appear in the Arctic-boreal ***,CMIP6 models overall overestimate tree height,and largely overestimate the global grass area but underestimate tree and shrub areas,especially in the middle and high *** should be kept in mind that such biases may have further impacts on the simulations of the related carbon and land-atmosphere interaction variables(e.g.,ecosystem production,carbon storage,transpiration,and temperature)for global change ***,bias-correction should

关键词： Earth system model CMIP6 Leaf area index vegetation distribution Tree height

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Surface pollen and modern vegetation in Southern Xinjiang,China

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Science China Earth Sciences 2024年第2期67卷 510-530页

作者： Yun ZHANG Lixin CHEN Yaoyao XI Zhaochen KONG Xianguo QIAO State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun130102China Institute of Botany Chinese Academy of SciencesBeijing100093China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing100049China School of Geosciences and Resources China University of Geosciences(Beijing)Beijing100083China

The study of modern pollen,and vegetation can improve the accuracy of paleoenvironmental reconstruction based on fossil pollen data.A total of 188 pollen surface samples were collected from Southern Xinjiang(34°00’–43°00’N,74°00’–94°00’E)in China,with an elevation range of 888–4530 *** pollen and vegetation were studied in the northern region of the Kunlun Mountains and the southern region of the Tianshan *** results showed that the surface pollen assemblages on the southern slope of the Tianshan Mountains(3530–1124 m)were divided into three pollen zones,namely,montane steppe,montane desert steppe,and montane *** zones were dominated by Artemisia,Chenopodiaceae,and Ephedra *** surface pollen assemblages in the eastern Pamir Plateau(4530–1287 m)could be divided into alpine meadow,montane desert steppe,and montane desert zones,which were predominantly characterized by Artemisia,Chenopodiaceae,and Asteraceae ***,the Southern Tarim Basin(3548–888 m)comprised montane desert steppe and montane desert zones,which was dominated by Artemisia and Chenopodiaceae *** geographic distribution of the surface pollen sites obtained using ArcGIS,the R-value,and Pearson correlation analyses indicated that the over-represented Picea and Pinus pollen were of external origin and were transported by wind,water(rivers),and ice(glacier movement).Over-representation of Ephedra and Nitraria pollen was mainly distributed in the montane desert and desert steppe zones,*** from Chenopodiaceae and Artemisia were over-represented and broadly distributed across Southern *** pollen was concentrated in areas with walnut trees,strongly indicating the presence of local parent *** to the Hybrid Singleparticle Lagrangian Integrated Trajectory model,more Pinus pollen was transported to the Pamir region by external airflows during spring and summer,resulting in its higher surface pollen *** elucidating t

关键词： Surface pollen vegetation distribution Picea Southern Xinjiang

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distribution pattern and limiting factors of vegetation in coal waste pile of Xinzhuangzi coal mine in Huainan

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Journal of Coal Science & Engineering(China) 2012年第4期18卷 413-417页

作者： CHU Zhao-xia WANG Shun-chang WANG Xing-ming Department of Life Science Huainan Normal UniversityHuainan 232001China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China

In China, coal mine spoils have traditionally been dumped in cone-shaped heaps that have the potential to pollute air, soil and water environments. The coal waste pile occupies lots of arable land and endangers the ecological system in the coal mine district. vegetation restoration is an efficient approach for controlling the environment pollution of coal waste pile, and is also a topic of current interest in restoration ecology and degradation system ecology. This study focused on the distribu- tion pattern and limiting factors of vegetation in coal waste pile of Xinzhuangzi Coal Mine in Huainan. The results show that two stable plant communities （Synodon dactylon＋Erigeron bonariensis.L＋Setaria viridis community and Humulus scan- den＋Erigeron bonariensis. L community） exist at the bottom of the pile. Synodon dactylon and Erigeron bonariensis. L have much higher values of summed dominance ratio, which denote that these two species can be used for restoration of coal waste piles. The high levels of pH （8.77） and salinity, low levels of total P and total K in coal mine spoil can be the limiting factors for the residence and growth of vegetation.

关键词： coal waste pile vegetation distribution limiting factor regetation restoration Xinzhuangzi Coal Mine

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The distribution of vegetation and Its Relationship with Environmental Factors in the Yellow River Estuarine Wetland

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Meteorological and Environmental Research 2012年第10期3卷 15-19页

作者： KOU Ming-juan LIU Jia-zhen CHEN Yong-jin ZHU Hai-yong LU Ya-kun LU Ming School of Environment and Planning Liaocheng University

[ Objective] The aim was to study the distribution of vegetation and its relationship with environmental factors in Yellow River estuarine wetland. [ Method] According to the data of the plant sample investigation and the related environmental factors in Yellow River Delta National Na- ture Reserve in 2009 -2010, the plant community changes and its relationship with environmental factors in temperate estuary wetland were ana- lyzed. [Result] There was little vegetation in the Yellow River delta and the distribution of plant was influenced by environment. Judging from the vegetation structure, the vertical structure of vegetation in the supralittoral zone zone vegetation cover included arbor layer, shrub layer and grass layer. The importance of grass was larger than shrub and arbor. In the intertidal zone, the vertical structure of plants was divided into shrub and herb layers. Judging from the variety, the species in the supralittoral zone was higher than that in the intertidal. The first principal component elected by Principal Component Analysis better reflects the salt of the study area, and the second principal component better reflects nutrient information. Regression analysis showed a positive correlation between importance value and the total salt content and electrical conductivity. In other words, if the total salt content and electrical conductivity increases, the importance value rose. However, the diversity index decreased as the total salt con- tent and electrical conductivity increased. [ Conclusion] The study provided theoretical basis for the ecological protection of vegetations and formula- tion of regional policies.

关键词： The Yellow River Delta vegetation distribution Environmental factor China

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Effect of seasonal snow on the start of growing season of typical vegetation in Northern Hemisphere

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Geography and Sustainability 2022年第3期3卷 268-276页

作者： Xiaodan Guan Shuyang Guo Jianping Huang Xiaohan Shen Li Fu Guolong Zhang Collaborative Innovation Center for Western Ecological Safety College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China

Under global warming, seasonal snow takes faster melting rate than before, which greatly changes the hydro-logical cycle. In this study, by targeting three typical seasonal snow-covered land types (i.e., open shrubland,evergreen needleleaf forest and mixed forest) in the Northern Hemisphere, the start of growing season (SGS) hasbeen found obviously advanced in the past years, greatly contributed by the faster melting rate of seasonal *** is manifested that significantly positive correlation has been found between SGS and May snow depth for openshrubs, March and April snow depth for evergreen needleleaf forests and March snow depth for mixed ***, such close association is not appeared in all the climate conditions of same vegetation. In the future,as the rate of melting snow becomes faster in the high emission of greenhouse gasses than the current situation,continuously advanced SGS will accelerate the change of vegetation distribution in the Northern *** findings offer insights into understanding the effect from seasonal snow on vegetation and promote thesustainable utilization of regional vegetation in the Northern Hemisphere.

关键词： vegetation distribution Start of growing season(SGS) Snow depth Climate condition Northern hemisphere(NH)

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The influence of soil compaction in explaining spatial heterogeneity of different larch forest types: a preliminary study

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Journal of Forestry Research 2020年第6期31卷 2395-2401页

作者： Yuan Tian Qiuliang Zhang Xuan Liu Department of Forest Management College of ForestryInner Mongolia Agricultural UniversityHohhot 010019Inner Mongolia Autonomous RegionPeople’s Republic of China

Compacted soil has an adverse effect on plant roots and affects water and nutrient ***,different degrees of soil compaction may be suitable for growth and development of different understory *** study determined whether soil compaction could explain characteristics of 10 different Dahurian larch(Larix gmelinii Rupr.)forest types in the Daxing’anling *** relationship of soil compaction to soil depth was also ***-five tests were conducted on soil compaction of the 10 forest types with multiple comparisons,of which five showed no significant *** different soil depths,there were significant differences in soil compaction among forest *** correlation between the degree of soil compaction and depth was positive and *** Larix gmelinii—shrub forest type,***—herb forest type,and ***—swamp forest type were significantly different in soil compaction according to soil *** research indicates that,as a physical property,soil compaction may.

关键词： vegetation distribution Biogeocenosis Species response Forest management Soil compaction

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Evaluation of the New Dynamic Global vegetation Model in CAS-ESM

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Advances in Atmospheric Sciences 2018年第6期35卷 659-670页

作者： Jiawen ZHU Xiaodong ZENG Minghua ZHANG Yongjiu DAI Duoying JI Fang LI Qian ZHANG He ZHANG Xiang SONG International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology School of Marine and Atmospheric Sciences Stony Brook University School of Atmospheric Sciences Sun Yat-Sen University College of Global Change and Earth System Science Beijing Normal University

In the past several decades, dynamic global vegetation models（DGVMs） have been the most widely used and appropriate tool at the global scale to investigate vegetation-climate interactions. At the Institute of Atmospheric Physics, a new version of DGVM（IAP-DGVM） has been developed and coupled to the Common Land Model（CoLM） within the framework of the Chinese Academy of Sciences＇ Earth System Model（CAS-ESM）. This work reports the performance of IAP-DGVM through comparisons with that of the default DGVM of CoLM（CoLM-DGVM） and observations. With respect to CoLMDGVM, IAP-DGVM simulated fewer tropical trees, more ＂needleleaf evergreen boreal tree＂ and ＂broadleaf deciduous boreal shrub＂, and a better representation of grasses. These contributed to a more realistic vegetation distribution in IAP-DGVM,including spatial patterns, total areas, and compositions. Moreover, IAP-DGVM also produced more accurate carbon fluxes than CoLM-DGVM when compared with observational estimates. Gross primary productivity and net primary production in IAP-DGVM were in better agreement with observations than those of CoLM-DGVM, and the tropical pattern of fire carbon emissions in IAP-DGVM was much more consistent with the observation than that in CoLM-DGVM. The leaf area index simulated by IAP-DGVM was closer to the observation than that of CoLM-DGVM; however, both simulated values about twice as large as in the observation. This evaluation provides valuable information for the application of CAS-ESM, as well as for other model communities in terms of a comparative benchmark.

关键词： vegetation dynamics dynamic global vegetation model vegetation distribution carbon flux leaf area index

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