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国家杰青!南京大学,又发Nature子刊!

  • 2026-03-31 00:45:21
国家杰青!南京大学,又发Nature子刊!

冰雹是伴随强对流天气出现的典型极端气象灾害,具有局地性强、突发性高、破坏力大的特点,每次冰雹过程都会对农业生产、建筑设施、交通出行以及公众生命财产安全造成严重威胁,随着全球极端天气频发、城市建成区不断扩张,冰雹灾害的防控压力持续加大,也因此成为气象灾害防控、全球气候变化领域的重点研究热点。然而,目前学界针对冰雹形成机制的研究存在明显短板,现有成果多以小范围案例分析为主,针对冰雹多发区域的系统性研究较为匮乏,即便少量研究提及城市下垫面对冰雹的潜在影响,也未能厘清具体的物理过程和驱动逻辑。

与此同时,传统研究普遍将非合并普通冰雹视为冰雹形成的主要模式,忽略了对流单体合并这一关键形成路径,无法解释全球多地冰雹频率持续上升的现实问题,更难以量化人为活动与气候变化对冰雹发生特征的叠加影响,导致冰雹预报和灾害风险评估存在较大偏差。有鉴于此,国内外科研团队长期聚焦单一气候区或单一冰雹类型开展研究,缺乏跨气候区的对比验证,相关形成机制的普适性无法得到证实。针对这一研究空白,本团队选取北美、东亚两大典型气候区,整合长期观测数据与高分辨率模拟技术,针对性探究对流合并型冰雹的形成机制及其未来变化趋势,弥补了该领域的研究短板。

南京大学赵坤教授课题组核心科学内容围绕冰雹形成新路径挖掘、多情景对比分析和未来趋势预估三大方向展开,突破传统研究局限,首次明确了对流单体合并是冰雹形成的关键路径,通过长期观测数据验证,证实该类型冰雹发生频率是传统非合并冰雹的近两倍,且强度更高,颠覆了学界以往对主流冰雹类型的认知,同时明确这一形成路径在北美、东亚两类差异显著的气候区均普遍适用,具备较强普适性。

研究进一步厘清了背后的驱动机制,适宜的大气环流与热力条件是多个对流单体生成、碰撞合并的基础,而大城市产生的人为热会改变局地大气热力结构,强化对流活动,进一步推动对流单体合并,放大冰雹发生概率和强度,直接揭示了城市人类活动对冰雹灾害的放大效应。此外,研究借助机器学习模型开展未来情景预估,明确北美地区未来对流合并型冰雹占比将持续提升,传统冰雹占比逐步下降,意味着未来冰雹灾害的强度和分布特征将发生显著改变。

该研究不仅挖掘了被长期忽视的冰雹形成机制,完善了强对流天气相关理论体系,更为全球不同区域冰雹灾害的精准预报、风险防控提供了全新的科学依据,同时指明了气候变化与城市化协同影响极端天气的研究方向,为后续相关灾害防控政策制定提供了重要支撑。

赵坤,男,南京大学大气科学学院教授、博导,院长。先后曾获国家自然科学基金杰出青年基金(2020)、国家自然科学基金优秀青年基金(2013)、教育部新世纪人才计划(2013)和江苏省“333高层次人才培养工程”中青年科技领军人才(2016)。2004年获得南京大学博士学位,2010年晋升南京大学教授。
先后至台湾大学、美国俄克拉何马大学风暴分析和预报中心、美国国家大气研究中心和宾州州立大学进行访问研究。主要从事灾害性天气雷达反演、同化预报和形成机理研究。先后主持或参加国家和省部级课题30余项,取得多项原创性成果,包括发展了天气雷达定量遥感理论和方法,揭示了我国典型灾害性天气系统(台风和强对流)发生发展机制,提高灾害性天气的短临预报精度。
相关成果在国内外一流刊物上发表论文100余篇,获得授权国家发明专利10余项,获江苏省科学技术一等奖(排名2)、二等奖(排名1)等奖励,多项技术在气象部门和雷达企业应用,取得显著的社会和经济效益。参与多项天气雷达相关的战略咨询报告,提出的“东方之星”号客轮翻沉事件成灾机制,被纳入国务院调查组的最终报告。主持举办了“气象雷达观测与应用”和“双偏振天气雷达原理和应用”两次国际夏季高级讲习班,以及多次全国性的天气雷达研讨会,完成培养多位雷达气象学方向研究生,2人分别入选江苏省优秀博士论文和硕士论文。

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  1. CONNECT:[ UseTime:0.000488s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000784s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000327s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000229s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000500s ]
  6. SELECT * FROM `set` [ RunTime:0.000215s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000576s ]
  8. SELECT * FROM `article` WHERE `id` = 506569 LIMIT 1 [ RunTime:0.000759s ]
  9. UPDATE `article` SET `lasttime` = 1774970255 WHERE `id` = 506569 [ RunTime:0.000816s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000211s ]
  11. SELECT * FROM `article` WHERE `id` < 506569 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000543s ]
  12. SELECT * FROM `article` WHERE `id` > 506569 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002197s ]
  13. SELECT * FROM `article` WHERE `id` < 506569 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004552s ]
  14. SELECT * FROM `article` WHERE `id` < 506569 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001633s ]
  15. SELECT * FROM `article` WHERE `id` < 506569 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003870s ]
0.088643s