Relationship Between Winter Snow Cover Days in Northeast China and Rainfall near the Yangtze River Basin in the Following Summer

Based on observed snow and precipitation data and NCEP/NCAR reanalysis data, the relationship between the number of winter snow cover days in Northeast China and the following summer＇s rainfall in the northern part of southern China is analyzed and the possible underlying mechanisms are discussed. The results indicate that a negative relationship is significant throughout the study period, especially more obvious after the 1980s. The pre-winter circulation patterns in years with more snow cover days and less summer rainfall in the south bank of the Yangtze River are almost the same. In years with more snow cover days, lower temperatures at the lower level over Northeast China are found in winter and spring. The winter monsoon is weaker and retreats later in these years than in those with fewer snow cover days. In spring of years with more snow cover days, anomalous cyclonic circulation is observed over Northeast China, and anomalous northerly wind is found in eastern China. In summer of these years, anomalous northeasterly wind at the lower level is found from the area south of the Yangtze River to the East China Sea and Yellow Sea; and with less southwesterly water vapor transport, the rainfall in the area south of the Yangtze River is less than normal, and the opposite patterns are true in years with fewer snow cover days. In recent years, the stable relationship between winter snow cover in Northeast China and summer rainfall in the Yangtze River basin can be used for summer rainfall prediction. The results are of great importance to short-term climate prediction for summer rainfall.

Influence of October Eurasian Snow on Winter Temperature over Northeast China

This paper addresses the interannual variation of winter air temperature over Northeast China and its connection to preceding Eurasian snow cover. The results show that there is a significant negative correlation between October Eurasian snow cover and following-winter air temperature over Northeast China. The snow cover located in eastern Siberia and to the northeast of Lake Baikal plays an important role in the winter air temperature anomaly. More （less） eastern Siberia snow in October can cause an atmospheric circulation anomaly pattern in which the atmospheric pressure is higher （lower） than normal in the polar region and lower （higher） in the northern mid-high latitudes. Due to the persistence of the eastern Siberia snow from October to the following winter, the winter atmospheric anomaly is favorable （unfavorable） to the widespread movement of cold air masses from the polar region toward the northern mid-high latitudes and, hence, lower （higher） temperature over Northeast China. Simultaneously, when the October snow cover is more （less）, the SST in the northwestern Pacific is continuously lower （higher） as a whole; then, the Aleutian low and the East Asia trough are reinforced （weakened）, favoring the lower （higher） temperature over Northeast China.

Analysis of Doppler Radar Data of the Largest Snow Process since Winter

[Objective] Characteristics of Doppler radar data of the largest snow process since winter in Chengde City on February 26,2011 were discussed.[Method] By dint of reflection rate factors,radial velocity,and VWP product of Doppler radar in C wave in Chengde of Hebei Province,and coupled with large scale of circulation situation,the largest snow process since the winter in Chengde City on February 26,2011 was discussed.[Result] The echo intensity of snow was weak.If there was certain range of 30 dBz echo and was stable,there might be strong snow.The warm advection,convection and warm and wet air climbing over the thin cold cushion in the lower layer was the main reason of the precipitation.The structure of 'cattle eye' and the torrent in the lower air provided incessant water vapor for the generation of strong precipitation.When the wind in the vertical direction changed,there was wind speed divergence,which indicated that the precipitation weakened and stopped.The existence of warm advection and shear layer was the essential reason for the maintenance of precipitation.The 'ND' area in the middle layer and the northwest wind at any height indicated the end of precipitation.[Conclusion] The study provided theoretical basis for the forecast of strong snow.

Distribution of winter-spring snow over the Tibetan Plateau and its relationship with summer precipitationin Yangtze River

The distribution of winter-spring snow cover over the Tibetan Plateau （TP） and its relationship with summer precipitation in the middle and lower reaches of Yangtze River Valley （MLYRV） during 2003-2013 have been investigated with the moderate-resolution imaging spectrometer （MODIS） Terra data （MOD10A2） and precipitation observations. Results show that snow cover percentage （SCP） remains approximately 20% in winter and spring then tails off to below 5% with warmer temperature and snow melt in summer. The lower and highest percentages present a declining tendency while the middle SCP exhibits an opposite variation. The maximum value appears from the middle of October to March and the minimum emerges from July to August. The annual and winter-spring SCPs present a decreasing tendency. Snow cover is mainly situated in the periphery of the plateau and mountainous regions, and less snow in the interior of the plateau, basin and valley areas in view of snow cover frequency （SCF） over the TP. Whatever annual or winter-spring snow cover, they all have remarkable declining tendency during 2003-2013, and annual snow cover presents a decreasing trend in the interior of the TP and increasing trend in the periphery of the TP. Hie multi-year averaged eight-day SCP is negatively related to mean precipitation in the MLYRV. Spring SCP is negatively related to summer precipitation while winter SCP is positively related to summer precipitation in most parts of the MLYRV. Hence, the influence of winter snow cover on precipitation is much more significant than that in spring on the basis of correlation analysis. The oscillation of SCF from southeast to northwest over the TP corresponds well to the beginning,development and cessation of the rain belt in eastern China.

RESPONSE OF THE ATMOSPHERIC GENERAL CIRCULATION TO WINTER SNOW COVER ANOMALY

In this paper,the response of the atmospheric general circulation to winter anomalous snow cover was investigated through observations studies and model simulation. Results from the observations show that:(1)the anomalous winter snow cover in the extratropics of Eurasian Continent bears an intimate relation to the contemporary atmospheric general circulation.The positive anomaly of winter snow cover is usually accompanied by positive atmospheric EUP teleconnection pattern and stronger East Asian winter monsoon:or vice versa. (2)The linkage between them suggests that the abnormal winter snow cover has an important impact on winter atmospheric general circulation.The anomalous snow cover pattern can lead to the anomaly of winter atmospheric EUP teleconnection pattern and thus influence East Asian Winter monsoon. With NCAR CCM2 including BATS land surface scheme,three groups of experiments were performed to examine the atmospheric response to the anomalous snow cover pattern and explore the relevant mechanism.Simulated results agree well with the observations,which testify the significant response of the atmosphere to snow cover anomaly.It is found that the radiative cooling induced by anomalous snow cover plays an important role in above processes,and the feedback of long-wave radiation can not be neglected.

亚冬会背景下黑龙江省冰雪体育旅游提质升级路径研究

2025年亚冬会的举办将为黑龙江省冰雪体育旅游发展提供新的契机和动力。通过文献资料、逻辑分析等研究方法,结合亚冬会背景对黑龙江省冰雪体育旅游提质升级路径进行研究,有助于加速推进区域冰雪体育旅游发展,提升我国冰雪体育旅游总体质量。研究得出:2025年亚冬会为黑龙江省冰雪体育旅游产业转型升级、基础设施建设、竞争优势扩大和政府职能转变提供了重要的推动作用,黑龙江省冰雪体育旅游呈现出地理环境、人才资源和人文特色等潜在优势,但也面临着体旅融合程度低、基础设施亟待升级、区位竞争优势不足、商业运营缺乏活力的现实困境。基于此,黑龙江省冰雪体育旅游应营造多元消费场景,促进体旅融合发展;提高供给服务水平,完善基础设施建设;打造特色旅游产品,扩大产业竞争优势;坚持有为政府主导,逐步增强市场活力。

Study on the extremely cold winter of 1670 over the middle and lower reaches of the Yangtze River

The snow-cover days over the middle and lower reaches of the Yangtze River （MLRYR） in the winter of 1670 were extracted from Chinese historical documents. By these records, the winter temperature anomalies （compared to the mean of 1961-1990） recorded at seven meteorological stations and the regional mean winter temperature were estimated. The results show that： （1） There was an average of about 30 snow-cover days over the MLRYR region in 1670, ranging from 11-20 days in Shanghai and eastern Zhejiang to 5140 days in eastern Hunan Province. The snow-cover days averaged about 40 days in Anqing and Nan- cheng, and ranged from 30 to 40 days in Quzhou, Jingdezhen, and Nanchang; and （2） the regional mean winter temperature in 1670 was estimated to be approximately 4.0 ℃ lower than that of 1961-1990. The maximum negative anomaly of 5.6℃ occurred in Nanchang and the minimum anomaly of-2.8 ℃ was detected in Quzhou. Both of these were lower than that of the coldest winter during the instrumental observation period of 1951-2010. This research could not only provide a method to es- timate historical climate extremes, but also provide a background to understand the recent instrumentally climate extremes.

亚冬会背景下黑龙江省高校传承冰雪体育文化的逻辑理路与实践策略

黑龙江省冰雪体育文化历史悠久、文脉流芳,适逢第9届亚洲冬季运动会即将在哈尔滨举办,在这一重要窗口期内,全省高校应以文化传承的主阵地姿态赋予冰雪体育文化更多的生长空间。采用文献资料、调查研究等研究方法梳理了黑龙江省高等院校助力冰雪体育文化发展的历史脉络,并针对黑龙江省高校在弘扬冰雪体育文化中的现实问题,提出了下一阶段冰雪体育文化工作的实践逻辑和具体措施。研究认为:龙江高校应以重大赛事为契机、以统一基调为逻辑指向、以有效联动为方法原则,大力凸显冰雪体育文化特质与内涵,进而促成冰雪体育文化在培育个人和引领社会中的双重作用,以文化共识达成文化自信,在文化兴盛中走向文化繁荣,从而以冰雪体育文化之笔书写出龙江地区再创辉煌的生动篇章。

CMIP6模式对欧亚大陆冬季雪水当量的模拟能力评估及未来预估

基于第六次耦合模式比较计划(CMIP6)的模式模拟数据和欧洲宇航局GlobSnow卫星遥感雪水当量(Snow Water Equivalent,SWE)资料,评估了CMIP6耦合模式对1981~2014年欧亚大陆冬季SWE的模拟能力,并应用多模式集合平均结果预估了21世纪欧亚大陆SWE的变化情况。结果表明,CMIP6耦合模式对冬季欧亚大陆中高纬度SWE空间分布具有较好的再现能力,能模拟出欧亚大陆中高纬度SWE的主要分布特征;耦合模式对SWE变化趋势及经验正交函数主要模态特征的模拟能力存在较大差异,但多模式集合能提高模式对SWE变化趋势和主要时空变化特征的模拟能力;此外,多模式集合结果对欧亚大陆冬季SWE与降水、气温的关系也有较好的再现能力。预估结果表明,21世纪欧亚大陆东北大部分地区的SWE均要高于基准期(1995~2014年),而90°E以西的欧洲大陆SWE基本上呈现减少的特征;21世纪早期,4种不同排放情景下积雪变化的差异不大,但21世纪后期积雪变化的幅度差异较大,而且排放越高积雪变化的幅度越大,模式不确定性也越大;进一步的分析表明,欧亚大陆冬季未来积雪变化特征的空间分布与全球变化背景下局地气温、降水的变化密切相关,高温高湿的条件有利于欧亚大陆东北部积雪的增多。

后冬奥时代我国冰雪产业高质量发展的动力变革与实现路径

运用文献资料法和逻辑分析法对后冬奥时代我国冰雪产业高质量发展的基础能力、发展机遇、动力变革进行了研究。研究发现:冰雪产业自身变革发展模式、拓展地理空间、服务乡村振兴、区域协同等自身优势为高质量发展奠定了基础;北京冬奥会为我国冰雪产业的高质量发展提供了发展机遇,加快构建了冰雪产业高质量发展的新格局,促进了产品体系完善和多链融合;产业变革的动力来自供需平衡、市场主体支撑、要素驱动转化、制度环境、科技创新。因此笔者提出要加强顶层设计,构建中国特色现代化的高质量冰雪产业发展体系;提高效率,规范职能,建设协同高效的一流营商环境;加强健康引领,丰富供给类型,建设服务人民的冰雪体育公共服务体系;夯实开放理念,增强科技助力,建设创新融合低碳发展的冰雪产业市场机制;建立支撑冰雪产业高质量发展的人才培养体系;以更高水平的对外开放,深度融入全球冰雪产业格局等路径促进后冬奥会时代我国冰雪产业的高质量发展。

体育强国建设背景下我国冰雪运动发展的现实样态、实然困境与实践路向

党的二十大报告提出了加快推进体育强国建设步伐的目标,在体育强国建设背景下,促进冰雪运动的发展是实现中国体育事业发展的重要路径。采用文献资料等研究方法,梳理我国冰雪运动发展的现实样态,分析我国冰雪运动发展面临的实然困境,进而提出我国冰雪运动发展的实践路向。研究认为,我国冰雪运动发展面临的实然困境主要包括冰雪运动核心竞争力不足、冰雪运动人口基数不足、校园冰雪运动开展滞后、冰雪体育产业发展水平较低。体育强国建设背景下我国冰雪运动发展的实践路向:完善冰雪运动竞技体系,夯实冰雪体育支撑基础;扩充冰雪体育人口基数,提升群众冰雪参与热情;重塑冰雪运动进校园,保障校园冰雪运动发展;提升冰雪体育产业生产力,拓宽冰雪产业发展道路。

后冬奥时期北方高校持续开展冰雪运动的背景、困境与策略

后冬奥时期,高校冰雪运动的开展质量能够深刻影响我国冰雪运动的稳步普及。北方地区省份众多、疆域广大,开展冰雪运动的自然条件优越,由此对我国北方高校冰雪运动持续开展的相关问题进行研究。在时代背景方面,发现冰雪历史积淀深厚、冰雪政策持续发布、冬奥遗产资源丰硕、冰雪强国转型需求是我国北方高校持续开展冰雪运动的有利机遇。但在北方高校中,学生对冰雪的认知存在局限、冰雪资金供给失衡、冰雪师资供不应求、冰雪赛事有待丰富是持续开展冰雪运动的现实困境。提出开展奥林匹克主题教育,丰富学生冰雪认知;提升冰雪师资队伍水平,优化冰雪课程教学效果;加强冰雪师资队伍建设,提升冰雪课程教学效果;举办冬季项目体育赛事,形成校园冰雪氛围等优化策略,以期在后冬奥时期为我国北方高校冰雪运动的可持续发展提供新的参考借鉴。

冬奥后河北休闲冰雪发展路径创新研究

该文分析了冬奥会对河北省冰雪产业的深远影响,涵盖设施提升、旅游业发展、产品和服务升级等方面。通过资源再利用和设施优化,河北省冰雪产业在冬奥会后实现了持续增长,尤其是在冰雪旅游、装备制造等领域。然而,政策、基础设施和人才等问题依然制约着相关产业的发展。该文提出了河北休闲冰雪产业创新路径,包括扩大群众参与、推动冰雪文化发展、完善产业链、提升服务品质以及加强冰雪人才储备等,旨在推动河北休闲冰雪产业可持续发展。

“后冬运会”背景下呼伦贝尔市冰雪体育旅游产业高质量发展的实践路径

全国第十四届冬季运动会于2024年在内蒙古自治区成功举办。呼伦贝尔市作为“十四冬”开(闭)幕式举行地及赛事主要承办地,通过赛事向公众呈现了呼伦贝尔独有的冰雪资源,为世人留下了特有的文化印记,展现了绝无仅有的城市魅力。“后冬运会”背景下,呼伦贝尔市冰雪体育旅游产业在“热度”和“流量”未减之时,亟需推动呼伦贝尔市冰雪体育旅游产业持续发展,为呼伦贝尔市新质生产力的发展做出应有贡献。本文分析了呼伦贝尔市独特地理环境和气候条件以及呼伦贝尔市在冰雪体育旅游的天然优势。通过调查我国当前冰雪体育旅游市场需求及消费趋势,指出呼伦贝尔市冰雪体育旅游产业在产业结构优化、服务质量提升等方面存在的问题。当前,需要从加强基础设施建设、提高专业人才培养、深化产业融合等三个方面推动呼伦贝尔市冰雪体育旅游产业高质量发展。

我国冰雪运动竞技实力与项目发展策略——基于2022北京冬奥会成绩

为提高我国冰雪运动竞技实力,更好地掌握我国冰雪运动项目发展的优势和劣势,积极备战2026年意大利米兰冬奥会,以我国2022北京冬奥会成绩为研究对象,采用文献资料法和逻辑分析法,分析了我国参与历届冬奥会的成绩,剖析了我国北京冬奥会成绩基本特征,对我国冰雪运动竞技实力与项目发展提出了针对性策略.研究结果表明:短道速滑和自由式滑雪是我国冬奥会上的重点优势项目,男女冰雪项目在北京冬奥会上获得奖牌数量相当.我国北京冬奥会成绩基本特征表现为冰雪项目“双轮驱动”、平衡发展,实现了全项目参赛目标,跨界跨项选材成果显著.

甘肃积石山地震液化型泥流特征、成因及其对黄河上游盆地地震次生灾害风险评估的启示

北京时间2023年12月18日23点59分30秒,甘肃省临夏州积石山县发生Ms 6.2级浅源地震,地震在青海省民和县中川乡诱发了一处同震特大型规模泥流灾害,造成了特大型灾难事件的发生。笔者采用现场调查、无人机摄影测量、现场取样及室内测试等研究方法对此次泥流灾害发育特征及成因进行分析。结果表明:①该泥流具有典型沟谷型泥石流平面特征,形成区、流通区和堆积区分界明显,泥流主要物源为山前洪积粉质黏土。②地震、降雪消融、农田冬灌、低温冻结,为泥流提供了初始动力并抬升了局部地下水位,是该泥流灾害的主要诱因;地形坡度、地层岩性,为泥流提供了后续运动势能和振动液化条件,是该泥流灾害的内因。③泥流运移过程中存在侧向和底部铲刮效应,尤其在3处流向改变区侧向铲刮、局部堆积显著,最终快速流入沟口金田村和草滩村。分析结果可为官亭盆地乃至黄河上游沉积盆地地震次生灾害风险评价工作提供思路与理论依据。

虚拟现实技术在冰雪娱乐运动中的应用研究

冰雪娱乐运动作为冬季旅游中代表性体验项目而倍受关注。通过运用数字技术手段宣传冰雪娱乐运动以满足更多爱好者的娱乐需求,降低旅客时间与金钱成本,值得设计开发研究。文章介绍国内冰雪娱乐运动项目与先进的虚拟现实技术的发展历程,阐述虚拟现实技术在冰雪娱乐运动的具体应用。