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Viet Nam 1969/1970: Pacification as a Path to No-where
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作者 Gerald Waite 《International Relations and Diplomacy》 2019年第9期385-393,共9页
Refugees, their movements, and the problems associated with their survival and maintenance in combat scenarios are a constant problem in the search for peace in war zones. In the American conflict in Viet Nam, the tra... Refugees, their movements, and the problems associated with their survival and maintenance in combat scenarios are a constant problem in the search for peace in war zones. In the American conflict in Viet Nam, the traditional village structure with its communal character created the perfect situation for seminal revolutionary movements and the ensuing conflict. These same villages then became targets for search and destroy operations and later wholesale clearing operations in which entire populations were forced into resettlement. In Quang Nam Province, in Central coastal Viet Nam, over 50% of the population or 500,000 people were in refugee status by 1969. The concept of "pacification" in 1970 focused on putting people back on the land in their original village areas or a return to normalcy for some of the population. This case study, by a former civil affairs officer, details movement of a population in refugee status to a "return to village" project, as pacification and an attempt at creating a manageable strategic population area. It failed on both counts. The mistakes inherent in this project illustrate some of the more widespread problems which plagued the conduct of the conflict in Viet Nam. It also calls into question, the concept of the military planning and execution of resettlement. The lack of a thorough understanding of local culture and subjects involved by planners and project officers alike contributed to a village which neither replaced the original nor survived as an improved model. 展开更多
关键词 VIETNAM VIETNAM WAR pacification Vietnamization refugees RESETTLEMENT
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Asia Pacific Hope for a Sustainable Future
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作者 James D.Sellmann 《Philosophy Study》 2026年第1期45-57,共13页
This paper expands Prasenjit Duara’s proposal that Asian religions and philosophies offer hope for a sustainable future.After outlining Duara’s sociology of history that describes the crisis of global modernity in t... This paper expands Prasenjit Duara’s proposal that Asian religions and philosophies offer hope for a sustainable future.After outlining Duara’s sociology of history that describes the crisis of global modernity in terms of three global changes,namely the rise of non-western nations,the crisis of climate change,and the decline of religious or transcendent sources of authority,Duara proposes that grassroots organizations coupled with Asian religious and philosophical beliefs and practices offer different ways of understanding the relationship between the person and the environment,and between our universal-planetary interests and our national interests.Drawing from Asian and Pacific indigenous teachings,I propose a type of depth ecology called“existential parity”that all things and creatures have value,generating a moral corollary called the“existential commitment”that humans take responsibility for the environment and each other.The existential commitment offers an environmental ethics that promotes sustainable agriculture to feed the world’s population.Pacific agroforestry practices can be implemented in urban settings to help mitigate climate change and food shortages. 展开更多
关键词 depth ecology AGROFORESTRY Asia Pacific food ethics sustainable future
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Acknowledgment of Reviewers,2025
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《Asian pacific Journal of Reproduction》 2026年第1期1-1,共1页
The Editors of Asian Pacific Journal of Reproduction wish to thank all reviewers listed below,as well as any others whose names may have been inadvertently omitted,for contributing their time and expertise in reviewin... The Editors of Asian Pacific Journal of Reproduction wish to thank all reviewers listed below,as well as any others whose names may have been inadvertently omitted,for contributing their time and expertise in reviewing manuscripts submitted to the journal in 2025.Their efforts have greatly contributed to the continued growth and quality of the journal.Here we acknowledge,with special thanks,to those who reviewed one or more papers during the year.Every effort has been made to ensure the accuracy of the list;we apologize for any errors or omissions. 展开更多
关键词 growth Asian Pacific Journal Reproduction manuscript review journal quality reviewing manuscripts acknowledgment reviewers
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Mechanisms of ENSO's cross-seasonal modulation of winter–spring atmospheric river activity over East Asia
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作者 Yuliang Zhou Wentao Jia +1 位作者 Weimin Zhang Huizan Wang 《Atmospheric and Oceanic Science Letters》 2026年第1期66-71,共6页
In this study,based on MERRA-2 reanalysis data and a multi-algorithm integrated atmospheric river(AR)iden-tification method,the authors reveal the cross-seasonal regulation mechanism of El Niño-Southern Oscillati... In this study,based on MERRA-2 reanalysis data and a multi-algorithm integrated atmospheric river(AR)iden-tification method,the authors reveal the cross-seasonal regulation mechanism of El Niño-Southern Oscillation(ENSO)on winter-spring AR activities in East Asia.The results show that ENSO asymmetrically modulates AR ac-tivity through teleconnection and hysteresis effects,and has significant enhancement/inhibition effects on ARs in different regions.At the onset of El Niño,enhanced southwesterly flow at the western edge of the western Pacific subtropical high(WPSH)leads to enhanced AR activity in the western Pacific,and anomalous southerly winds in the Indian Ocean promote northward transport of water vapor in the Arabian Sea and Bay of Bengal.With a three-month lag,the weakening and eastward retreat of the WPSH weakens the low-latitude AR activity,but persistent southerly winds in the Bay of Bengal maintain the AR activity over Southwest China.The mid-to high-latitude AR response exhibits delayed dynamics,initially dominated by the synergistic effect of the southward deviation of the upper-air rapids and the low-level convergence(double-rapid-flow effect)and later modulated by the Pacific-North American teleconnection(PNA)-triggered East Asian ridge,which enhances the precipitation efficiency through prolonged frontal activity and enhanced cold-warm airmass convergence.Overall,El Niño promotes the development of low-and midlatitude AR activity in East Asia,while La Niña promotes(maritime continental)AR activity in the tropics.This study establishes the“ENSO teleconnection→circulation adjust-ment→East Asian AR response”chain,revealing a cross-seasonal lagged response mechanisms of East Asian AR activity,and provides a theoretical basis for winter and spring climate prediction and extreme precipitation forecasting. 展开更多
关键词 ENSO Atmospheric river Western Pacific subtropical high East Asia Lagged response
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Long-Term Trends of the South Pacific–Subantarctic Mode Water Modulated by the Interdecadal Pacific Oscillation
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作者 JIANG Jindong SHI Jiuxin +2 位作者 ZHU Yaohua XU Tengfei WEI Zexun 《Journal of Ocean University of China》 2026年第1期1-12,共12页
The subantarctic mode water(SAMW)represents a large water mass in the Southern Ocean.This body of water forms through deep convection(subduction)in winter and contributes to the uptake and storage of anthropogenic hea... The subantarctic mode water(SAMW)represents a large water mass in the Southern Ocean.This body of water forms through deep convection(subduction)in winter and contributes to the uptake and storage of anthropogenic heat.However,its longterm changes in subduction rate and volume in response to shifting climate conditions are unclear.In this study,we investigated the long-term trend of the subduction rate and volume of the South Pacific–SAMW(SPSAMW)using Simple Ocean Data Assimilation outputs during 1980–2017.The results show the overall increasing trend of the subduction rate of the SPSAMW.The increased subduction of the SPSAMW directly contributes to the volume variation in the SPSAMW.The increased subduction in the South Pacific reached(0.28±0.16)Sv-1 per year,which explains nearly 68%of the volume increase in the SPSAMW.This variability in the SPSAMW reflects alterations in the overlying atmosphere.The positive to negative phase change of the Interdecadal Pacific Oscillation(IPO)in 1980–2017 deepened the Amundsen Sea Low(ASL)via atmospheric teleconnections over the South Pacific.Further analysis reveals that the increased westerly winds during the deepening of ASL resulted in more cold water transport from the south,which deepened the winter mixed layer and thus increased subduction and volume within the SPSAMW subduction region.This finding suggests the association of the long-term trends of SPSAMW subduction and volume with the phase change of the IPO. 展开更多
关键词 South Pacific subduction rate subantarctic mode water Amundsen Sea Low
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Investigation of natural and anthropogenic effects on aerosols optical properties over the Western Pacific ocean by the research vessel KEXUE
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作者 Jinyuan Xin Yining Ma +6 位作者 Xiangguang Zhang Yongjing Ma Xiaoyan Wu Fangkun Wu Quan Liu Yilong Lyu Jiawei Jiang 《Journal of Environmental Sciences》 2026年第1期596-605,共10页
In winter 2018,an aerosol physicochemical experiment was conducted in the Western Pacific Ocean(WPO)aboard the Research Vessel KEXUE of Chinese Academy of Sciences.This study systematically investigated both natural a... In winter 2018,an aerosol physicochemical experiment was conducted in the Western Pacific Ocean(WPO)aboard the Research Vessel KEXUE of Chinese Academy of Sciences.This study systematically investigated both natural and anthropogenic effects on marine aerosols optical properties,as well as the applicability of multi-satellite products and IMPROVE equation.The averaged aerosol optical depth(AOD500 nm)was 0.31±0.16 andÅngström exponent440–675 nm was 0.29±0.30.In offshore China,significant anthropogenic emissions affected the marine environment.In remote WPO,dust aerosols transported from northern China,Siberia,Central Asia,and those settling from the upper troposphere originating from north Africa,Arabian peninsula,and western India,were dominant.The spatial trends of AOD were opposite in the mid-latitude and southern seas of WPO.The highest AOD,0.32±0.23,appeared along the coast of South Asia at mid-latitude,decreasing from offshore seas to remote oceans.In low-latitude and equatorial seas,AOD significantly increased from coast to remote oceans.Ångström exponent dropped significantly from the coast to remote oceans as anthropogenic influence diminished across the entire WPO.Correlation analysis showed that both MODIS-C6 and Himawari AOD prod-ucts showed similar applicability in coastal urban areas,while Himawari AOD is highly recommended for coastal background and marine environment due to its finer resolution.The extinction coefficient derived from PM_(2.5) chemical compositions using IMPROVE algorithm exhibited a significant correlation(R^(2)=0.58)with the con-currently measured AOD in the absence of long-distance transport,suggesting that the IMPROVE is a reasonable proxy of the columnar average of marine aerosol extinctions free from transport influences. 展开更多
关键词 Aerosol optical properties Natural and anthropogenic effects Improve algorithm Ship-borne experiment Western Pacific Ocean
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Gap-free,haplotype-resolved genome assembly reveals allele-specific expression and fruit color regulation in coconut
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作者 Min Chen Jing Li +6 位作者 Ziqi Ye Xiwei Sun Xiaomei Liu Hao Ding Lixia Zhou Xingtan Zhang Yaodong Yang 《Horticultural Plant Journal》 2026年第1期217-220,共4页
Coconut(Cocos nucifera L.),a major oil and fruit crop of the Arecaceae family,is extensively cultivated across the Asia—Pacific region.Despite its agricultural importance,genome assembly in coconut remains challengin... Coconut(Cocos nucifera L.),a major oil and fruit crop of the Arecaceae family,is extensively cultivated across the Asia—Pacific region.Despite its agricultural importance,genome assembly in coconut remains challenging due to its large genome size and high proportion of repetitive sequences.Allele-specific expression(ASE)plays a key role in regulating plant development and evolution,yet research on ASE in coconut is limited(Shao et al.,2019;Li et al.,2021;Zhang et al.,2021;Hu et al.,2022).Among phenotypic traits,fruit color is especially important as an indicator of maturity,guiding harvest timing and post-harvest processes(Kapoor et al.,2022).While prior studies have explored various coconut traits such as salt tolerance,fiber content,and plant height(Wang et al.,2021;Yang et al.,2021),investigations into ASE and fruit color remain scarce. 展开更多
关键词 allele specific expression Cocos nucifera haplotype resolved fruit color Asia Pacific region COCONUT phenotypic trai oil fruit crop
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Different effects of eastern and central Pacific El Niño events on the surface shortwave radiation over southern China in winter
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作者 Ming Cheng Ziniu Xiao +4 位作者 Xinyi Lai Jingjing Xu Siyu Lu Baorong Zhou Weisi Deng 《Atmospheric and Oceanic Science Letters》 2026年第1期27-33,共7页
This study investigates the distinct impacts of eastern Pacific(EP)and central Pacific(CP)El Niño events on winter shortwave solar radiation(SSR)in southern China,revealing different spatial distributions and und... This study investigates the distinct impacts of eastern Pacific(EP)and central Pacific(CP)El Niño events on winter shortwave solar radiation(SSR)in southern China,revealing different spatial distributions and underlying mechanisms.The results show that,during the developing winter of EP El Niño,significant SSR reductions occur in southwestern China and the east coast of southern China due to a strong,zonally extended Northwest Pacific anticyclone that transports moisture from the tropical Northwest Pacific and North Indian Ocean,while the northeast of southern China experiences a weak increase in SSR.In contrast,during the developing winter of CP El Niño,SSR decreases in the east of southern China with a significant decrease in the lower basin of the Yangtze River but an increase in the west of southern China with a remarkable increase in eastern Yunnan.The pronounced east-west dipole pattern in SSR anomalies is driven by a meridionally elongated Northwest Pacific anticyclone,which enhances northward moisture transport to the east of southern China while leaving western areas drier.Further research reveals that distinct moisture anomalies during the developing winter of EP and CP events result in divergent SSR distributions across southern China,primarily through modulating the total cloud cover.These findings highlight the critical need to differentiate between El Niño types when predicting medium and long-term variability of radiation in southern China. 展开更多
关键词 EP El Niño CP El Niño Shortwave solar radiation Northwest Pacific anticyclone Total cloud cover Total column water
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A hybrid coupled model for the tropical Pacific constructed by integrating ROMS with a statistical atmospheric model 被引量:2
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作者 Rong-Hua ZHANG Wenzhe ZHANG +4 位作者 Yang YU Yinnan LI Feng TIAN Chuan GAO Hongna WANG 《Journal of Oceanology and Limnology》 2025年第4期1037-1055,共19页
Numerical models are crucial for quantifying the ocean-atmosphere interactions associated with the El Niño-Southern Oscillation(ENSO)phenomenon in the tropical Pacific.Current coupled models often exhibit signifi... Numerical models are crucial for quantifying the ocean-atmosphere interactions associated with the El Niño-Southern Oscillation(ENSO)phenomenon in the tropical Pacific.Current coupled models often exhibit significant biases and inter-model differences in simulating ENSO,underscoring the need for alternative modeling approaches.The Regional Ocean Modeling System(ROMS)is a sophisticated ocean model widely used for regional studies and has been coupled with various atmospheric models.However,its application in simulating ENSO processes on a basin scale in the tropical Pacific has not been explored.For the first time,this study presents the development of a basin-scale hybrid coupled model(HCM)for the tropical Pacific,integrating ROMS with a statistical atmospheric model that captures the interannual relationships between sea surface temperature(SST)and wind stress anomalies.The HCM is evaluated for its capability to simulate the annual mean,seasonal,and interannual variations of the oceanic state in the tropical Pacific.Results demonstrate that the model effectively reproduces the ENSO cycle,with a dominant oscillation period of approximately two years.The ROMS-based HCM developed here offers an efficient and robust tool for investigating climate variability in the tropical Pacific. 展开更多
关键词 Regional Ocean Modeling System(ROMS) statistical atmospheric model hybrid coupled model El Niño-Southern Oscillation(ENSO) model evaluation tropical Pacific
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一种实时工况数据处理软件设计 被引量:1
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作者 刘鑫 赵恒 张兆赫 《机电信息》 2025年第13期59-62,共4页
轨/姿控卫星发动机试验需要进行多种不同工况下的点火试验来验证发动机的性能,每次点火结束后都要对点火数据进行处理分析,用以计算下一次点火的工况。由于发动机点火对于总体时长有严格要求,故提出一种试验数据实时处理软件,介绍了其... 轨/姿控卫星发动机试验需要进行多种不同工况下的点火试验来验证发动机的性能,每次点火结束后都要对点火数据进行处理分析,用以计算下一次点火的工况。由于发动机点火对于总体时长有严格要求,故提出一种试验数据实时处理软件,介绍了其开发过程和方法。该软件是在Pacific6000数据采集系统的基础上,建立客户端工作站,通过网络从服务器或操作站端获得数据,采用VB语言,结合试验各类型参数处理算法而开发的,具有操作简便、功能齐全、效率高等特点。软件已成功应用于多次试验,取得了良好效果。 展开更多
关键词 发动机 工况计算 实时处理 Pacific6000数据采集系统
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The strongest early-summer drought–flood abrupt alternation event over the Huang–Huai–Hai River Basin in 2024 since the 1980s:Perspective of anomalous subseasonal circulation evolution 被引量:1
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作者 Zhiheng Chen Zhihai Zheng 《Atmospheric and Oceanic Science Letters》 2025年第5期65-72,共8页
Since the 21st century,the Huang–Huai–Hai River Basin(HHHRB)in China has experienced increased frequency and severity of drought–flood abrupt alternation(DFAA)events during early summer,characterized by droughts in... Since the 21st century,the Huang–Huai–Hai River Basin(HHHRB)in China has experienced increased frequency and severity of drought–flood abrupt alternation(DFAA)events during early summer,characterized by droughts in June followed by floods in July.The 2024 event was the most severe since 1981.This study demonstrates that such compound extreme events are closely linked to anomalous subseasonal evolution of large-scale atmospheric circulation.During the drought phase,the East Asian subtropical westerly jet(EAJ)shifts southward,and the western Pacific subtropical high(WPSH)exhibits anomalous strengthening with its western ridge line displaced southward.The flood phase is characterized by acceleration of the EAJ,westward extension of the WPSH,and enhanced southwestern moisture transport from the western Pacific.Beyond these typical features,the 2024 early summer circulation exhibited unique characteristics:Anomalous northeastward intensification of the WPSH facilitated merged moisture influx from both the Indian Ocean and the western Pacific along the southeast pathway into the HHHRB in July,resulting in the highest net moisture inflow at the southern boundary of the HHHRB since 1981.The synergistic effects of multiple factors primarily explain the exceptionally intense DFAA event in 2024. 展开更多
关键词 Drought-flood abrupt alternation Anomalous subseasonal circulation evolution East Asian subtropical westerly jet Western Pacific subtropical high Water vapor transportation
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Trends in Extreme Precipitation Events across Antarctica 被引量:1
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作者 Cuijuan SUI Lejiang YU +1 位作者 Shiyuan ZHONG Licheng FENG 《Advances in Atmospheric Sciences》 2025年第12期2471-2484,共14页
This study investigates trends in extreme precipitation events(EPEs)across Antarctica from 1979 to 2023,analyzing changes in EPE frequency,intensity,and the proportion of extreme to total precipitation.Using Self-Orga... This study investigates trends in extreme precipitation events(EPEs)across Antarctica from 1979 to 2023,analyzing changes in EPE frequency,intensity,and the proportion of extreme to total precipitation.Using Self-Organizing Map(SOM)techniques,the study distinguishes the contributions from thermodynamic,dynamic,and interaction components in explaining these trends.Positive EPE occurrence trends are observed across the Bellingshausen and Weddell Seas,Dronning Maud Land,and parts of the Southern Ocean,with declines limited to Queen Mary Land.Thermodynamic factors,responsible for 96.0%of the overall trend,are driven by increased water vapor content in polar air masses.Dynamic contributions,representing 10.8%,are linked to a strengthened Amundsen Sea Low(ASL)associated with the Southern Annular Mode(SAM)and Pacific South American(PSA)trends.Interaction effects make a slightly negative contribution(-6.8%)to the overall trend.Variations in water vapor transport and vertical velocity tied to annual 500-hPa geopotential height anomalies further explain EPE trends.These findings provide insight into the atmospheric processes that influence Antarctic EPEs,with implications for understanding the climatic impact on the polar environment. 展开更多
关键词 extreme precipitation ANTARCTICA polar climate climate variability Southern Annual Mode(SAM) Pacific South America(PSA)mode Self-Organized Map(SOM)
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Interannual variability of boreal summer intraseasonal oscillation over the northwestern Pacific influenced by the Pacific Meridional Mode
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作者 Haoyu Zhou Pang-Chi Hsu +1 位作者 Lin Chen Yitian Qian 《Atmospheric and Oceanic Science Letters》 2025年第1期6-11,共6页
During the boreal summer,intraseasonal oscillations exhibit significant interannual variations in intensity over two key regions:the central-western equatorial Pacific(5°S-5°N,150°E-150°W)and the s... During the boreal summer,intraseasonal oscillations exhibit significant interannual variations in intensity over two key regions:the central-western equatorial Pacific(5°S-5°N,150°E-150°W)and the subtropical Northwestern Pacific(10°-20°N,130°E-175°W).The former is well-documented and considered to be influenced by the ENSO,while the latter has received comparatively less attention and is likely influenced by the Pacific Meridional Mode(PMM),as suggested by partial correlation analysis results.To elucidate the physical processes responsible for the enhanced(weakened)intraseasonal convection over the subtropical northwestern Pacific during warm(cold)PMM years,the authors employed a moisture budget analysis.The findings reveal that during warm PMM years,there is an increase in summer-mean moisture over the subtropical northwestern Pacific.This increase interacts with intensified vertical motion perturbations in the region,leading to greater vertical moisture advection in the lower troposphere and consequently resulting in convective instability.Such a process is pivotal in amplifying intraseasonal convection anomalies.The observational findings were further verified by model experiments forced by PMM-like sea surface temperature patterns. 展开更多
关键词 Boreal summer intraseasonal oscillation Interannual variability Pacific Meridional Mode Moisture budget analysis
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Solar cycles during the seventeenth century revealed by equatorial aurora records
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作者 Yong Wei LiMei Yan 《Earth and Planetary Physics》 EI CAS 2025年第1期182-187,共6页
Solar cycles are fundamental to astrophysics,space exploration,technological infrastructure,and Earth's climate.A better understanding of these cycles and their history can aid in risk mitigation on Earth,while al... Solar cycles are fundamental to astrophysics,space exploration,technological infrastructure,and Earth's climate.A better understanding of these cycles and their history can aid in risk mitigation on Earth,while also deepening our knowledge of stellar physics and solar system dynamics.Determining the solar cycles between 1600 and 1700-especially the post-1645 Maunder Minimum,characterized by significantly reduced solar activity-poses challenges to existing solar activity proxies.This study utilizes a new red equatorial auroral catalog from ancient Korean texts to establish solar cycle patterns from 1623 to 1700.Remarkably,a further reevaluation of the solar cycles between 1610 and 1755 identified a total of 13 cycles,diverging from the widely accepted record of 12 cycles during that time.This research enhances our understanding of historical solar activity,and underscores the importance of integrating diverse historical sources into modern analyses. 展开更多
关键词 solar cycle Maunder Minimum solar activity red equatorial aurora West Pacific geomagnetic anomaly
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Burden of mental disorders and risk factors in the Western Pacific region from 1990 to 2021
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作者 Ya-Xin Xu Xiao-Xuan Niu +8 位作者 Wen-Chang Jia Jing Wen Xue-Lin Cheng Yan Han Ming-Hui Peng Jing Zhou Yao Liu Sun-Fang Jiang Xiao-Pan Li 《World Journal of Psychiatry》 SCIE 2025年第1期93-105,共13页
BACKGROUND The burden of mental disorders(MD)in the Western Pacific Region(WPR)re-mains a critical public health concern,with substantial variations across demogra-phics and countries.AIM To analyze the burden of MD i... BACKGROUND The burden of mental disorders(MD)in the Western Pacific Region(WPR)re-mains a critical public health concern,with substantial variations across demogra-phics and countries.AIM To analyze the burden of MD in the WPR from 1990 to 2021,along with associated risk factors,to reveal changing trends and emerging challenges.METHODS We used data from the Global Burden of Disease 2021,analyzing prevalence,incidence,and disability-adjusted life years(DALYs)of MD from 1990 to 2021.Statistical methods included age-standardisation and uncertainty analysis to address variations in population structure and data completeness.RESULTS Between 1990 and 2021,the prevalence of MD rose from 174.40 million cases[95%uncertainty interval(UI):160.17-189.84]to 234.90 million cases(95%UI:219.04-252.50),with corresponding DALYs increasing from 22.8 million(95%UI:17.22-28.79)to 32.07 million(95%UI:24.50-40.68).During this period,the burden of MD shifted towards older age groups.Depressive and anxiety disorders were predominant,with females showing higher DALYs for depressive and anxiety disorders,and males more affected by conduct disorders,attention-deficit hyperactivity disorder,and autism spectrum disorders.Australia,New Zealand,and Malaysia reported the highest burdens,whereas Vietnam,China,and Brunei Darussalam reported the lowest.Additionally,childhood sexual abuse and bullying,and intimate partner violence emerged as significant risk factors.CONCLUSION This study highlights the significant burden of MD in the WPR,with variations by age,gender,and nation.The coronavirus disease 2019 pandemic has exacerbated the situation,emphasizing the need for a coordinated response. 展开更多
关键词 Mental disorders Western pacific region Global Burden of Disease Risk factors Disability-adjusted life years
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Assessing Common Era impacts of Asian dust on tropical cyclone changes in the Northwestern Pacific
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作者 CHEN Zhitong KANG Wengang LIU Jianbao 《Journal of Geographical Sciences》 2025年第8期1761-1772,共12页
Tropical cyclones(TCs)have profound impacts on socioeconomic conditions and pose substantial risks to lives and property.However,it is still unclear whether the multitimescale changes in TC activity over the past 2000... Tropical cyclones(TCs)have profound impacts on socioeconomic conditions and pose substantial risks to lives and property.However,it is still unclear whether the multitimescale changes in TC activity over the past 2000 years in the Northwestern Pacific(NWP)were regulated by Asian dust forcing.Here,we assessed the impact of Asian dust on TC activity using observational data and reconstructed records from the northern and southern NWP.Our correlation analysis of instrumental data from 1954 to 2017 reveals no significant relationship between observed TC activity and Asian dust forcing.Furthermore,we found a meridional dipole pattern of TC variation across the NWP in observations and reconstructions.These finding challenges current explanations that are based on the synchronous changes in TC activity and Asian dust forcing.Alternatively,we propose that the Western Pacific Subtropical High(WPSH)plays a crucial role in driving these meridional dipole patterns in TC variations,as supported by observations and reconstructions.The southwestward extension of an enhanced WPSH intensifies easterly flow,steering TCs westward along its southern edge.This leads to more TC activity in the southern NWP but less in the north,and vice versa when the WPSH is weakened.With the expected strengthening of the WPSH due to global warming,it is vital to consider its impact on NWP TC activity for effective risk-mitigation strategies. 展开更多
关键词 tropical cyclone Asian dust Western Pacific Subtropical High Northwestern Pacific
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Morphology and phylogeny of two species of Bathypathes from the tropical western Pacific,with description of a new species
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作者 Ting LÜ Zifeng ZHAN Kuidong XU 《Journal of Oceanology and Limnology》 2025年第1期248-260,共13页
The black coral genus Bathypathes Brook,1889 represents a relatively diverse and ecologically important assemblage comprising the deep-sea hard substrate communities.Recent phylogenetic investigations have revealed th... The black coral genus Bathypathes Brook,1889 represents a relatively diverse and ecologically important assemblage comprising the deep-sea hard substrate communities.Recent phylogenetic investigations have revealed the polyphyletic nature of Bathypathes,urging further morphological analysis to understand its systematics.By combing morphological and molecular data,we describe Bathypathes multifurcata sp.nov.and report B.pseudoalternata Molodtsova,Opresko&Wagner,2022based on the specimens collected from the tropical western Pacific.The phylogenetic topology reconstructed using nuclear ITS1-5.8S-ITS2 and three mitochondrial fragments suggests the separation of Bathypathes into four groups.Our analysis of morphological characters,particularly the colony branch and pinnule patterns also roughly classify Bathypathes into four morphological groups A–D.Group A is characterized by the unbranched colony and the subopposite arrangement of pinnules.In contrast to Group A,Groups B–D have the alternately arranged pinnules.Among these,Group C exhibits a distinctly long unpinnulated stem compared to Groups B and D.Group B has unbranched colony,relatively short unpinnulated stem,and spines on pinnules have blunt apex.Within Group D,large colonies(higher than 40 cm)have one or a few branches,small colonies(less than 40 cm)are unbranched,and spines on pinnules have acute apex.Further data particularly those species without sequences are necessary to verify the classification of these groups. 展开更多
关键词 Antipatharia black coral TAXONOMY PHYLOGENY SEAMOUNT western Pacific
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A new species of genus Thalassometra AH Clark,1907(Crinoidea:Tropiometroidea:Thalassometridae)from a seamount on the Caroline Ridge in the northwest Pacific
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作者 Shao’e SUN Zijie MEI Zhongli SHA 《Journal of Oceanology and Limnology》 2025年第4期1313-1319,共7页
During the expedition to an unnamed seamount of Caroline Ridge in the northwest Pacific Ocean,one Thalassometra specimen was sampled,and careful morphological assessment suggested that this specimen represents a new s... During the expedition to an unnamed seamount of Caroline Ridge in the northwest Pacific Ocean,one Thalassometra specimen was sampled,and careful morphological assessment suggested that this specimen represents a new species within the genus Thalassometra:Thalassometra brachia sp.nov.This new species was collected at a depth of 688 m and is characterized by the dome-like centrodorsal,large number of arms(43 in total),irregularly arranged sockets with three per radial area,P 2 and P 3,similar in size and character and smaller than P 1,spinous median carination on the first and second ossicles of the division series and on the first two brachials,and dense spicules in brachial bases. 展开更多
关键词 new species CRINOIDEA Thalassometra SEAMOUNT western Pacific
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Geochemical characteristics and genesis of the elements in ferromanganese nodules from the Northwest Pacific
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作者 Jingjing Gao Jihua Liu +3 位作者 Shijuan Yan Lianhua He Xiangwen Ren Quanshu Yan 《Acta Oceanologica Sinica》 2025年第1期86-103,共18页
To explore the geochemical characteristics and genesis of the elements in ferromanganese nodules from the Northwest Pacific,this study analyses the mineral composition,elemental content,occurrence phase and genetic me... To explore the geochemical characteristics and genesis of the elements in ferromanganese nodules from the Northwest Pacific,this study analyses the mineral composition,elemental content,occurrence phase and genetic mechanisms of samples by X-ray diffraction(XRD),inductively coupled plasma-optical emission spectrometry(ICP-OES),inductively coupled plasma-mass spectrometry(ICP-MS)and phase analysis methods.The results show that ferromanganese nodules are mainly hydrogenetic,and Mn/Fe content ratio ranges from 0.95 to 2.05.The major minerals are vernadite(δ-MnO_(2))and amorphous ferric oxyhydroxide(FeOOH),and the secondary minerals include todorokite,birnessite,quartz and plagioclase.Ferromanganese nodules contain high contents of Co(0.24%-0.42%),Cu(0.23%-0.73%),Ni(0.33%-0.86%)and rare earth elements(REEs,1192-1990μg/g),which have positive Ce and negative Y anomalies but no Eu anomaly.A cluster analysis suggests that the elements in ferromanganese nodules can be divided into three groups:hydrogenetic components,including Fe,Ti,Zr,P,Pb,Co,Ba,Sr,V and REEs;diagenetic components,including Mn,Ni,Mg,Zn and Cu;and detrital components,including Al,Na,K and Ca.According to chemical leaching,ferromanganese nodules can be divided into four phases:Na,Ca,Mg and Sr are mainly enriched in the carbonate phase;Mn,Co,Ni and Ba are mainly enriched in the Mn-oxide phase;Fe,P,Ti,Cu,Pb,V,Zn,Zr and REEs are mainly enriched in the Fe-oxide phase;and Al and K are mainly enriched in the residual phase.A combination of the two different methods reveal selective enrichment of metal elements from seawater by ferromanganese nodules,featuring multisource mineralization.Moreover,through ion exchange and adsorption,approximately 71.2%of REEs are enriched in the Fe-oxide phase,15.4%in the Mn-oxide phase and 12.4%in the residual phase,while REE contents in the carbonate phase are relatively low.In addition,under the oxic conditions of seawater,the oxidation of soluble Ce^(3+)to insoluble CeO_(2)together with Fe-Mn minerals results in Ce enrichment in ferromanganese nodules.This study provides a reference for the metallogenesis of ferromanganese nodules from the Northwest Pacific. 展开更多
关键词 Northwest Pacific ferromanganese nodules REES occurrence phase GENESIS
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Transcriptome Analysis of Strong Selection Due to Inbreeding at the Early Life Stage of Crassostrea gigas
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作者 FANG Jiafeng LI Qi 《Journal of Ocean University of China》 2025年第5期1351-1363,I0015-I0664,共663页
Inbreeding usually reduces the mean phenotypic value of various traits.In Crassostrea gigas,inbreeding depression at the early life stage might be particularly remarkable because of a high mutational load that is diff... Inbreeding usually reduces the mean phenotypic value of various traits.In Crassostrea gigas,inbreeding depression at the early life stage might be particularly remarkable because of a high mutational load that is difficult to purge.In this study,the ef-fects of inbreeding on the survival rate and gene expression at the early life stage were investigated.Two inbred groups containing five F1 families and five F2 families with a theoretically higher degree of inbreeding were constructed based on an inbred strain.Meanwhile,5 families were established as the control group(CF)based on the wild population.The results showed that the survival rate of the CF group was significantly higher than those of the two inbred groups.Differential gene analysis showed 1616 common differentially expressed genes(DEGs)in the two inbred groups,which were significantly enriched in pathways associated with im-mune response,nutrient restriction,and virus infection.By weighted gene co-expression network analysis(WGCNA),19 common DEGs were enriched in M21,the functional module most closely related to inbreeding,and 6 of them were related to immunity.No-tably,the survival rate of F2 was higher than that of F1.A total of 643 DEGs between F1 and CF were screened out,which did not show differential expression between F2 and CF,and these genes were significantly enriched in pathways associated with protein syn-thesis.These results contribute to a more comprehensive understanding of the genetic mechanism behind the effect of inbreeding on the early survival rate of oyster larvae. 展开更多
关键词 inbreeding depression Pacific oyster larvae RNA-SEQ enrichment analysis WGCNA
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