Results 31 to 40 of about 939 (110)
Study on the Suitable Area of Ratoon Rice in China Under Climate Change
In view of this, we speculate that the autumn heat conditions in the northern Qinling–Huaihe Line will still limit the northward advance of ratoon rice. With future climate change, a small part of the highly‐suitable area for ratoon rice in the southern Qinling–Huaihe Line will transform into a double‐cropping rice area, while most of the lowly ...
Wei Luo +7 more
wiley +1 more source
香港地区每年均有一定数量的滑坡灾害发生,诱发滑坡灾害的主要因子是强降水,即暴雨.暴雨过程中,降水强度的时空分布存在一定差异性,这种降水强度的时空与滑坡灾害的时空分布存在一定的联系.以香港地区1992年5月8日暴雨为例,以30 min为时间间隔,分析了暴雨中心时空变动与滑坡事件时空分布及出现频率之间的关系,发现空间上滑坡均出现在暴雨中心或暴雨中心的边沿地区;时间上滑坡事件出现在暴雨中心出现或上一阶段时间内;并且降水的强度与滑坡的出现频率也有一定关系.
李军, 周成虎
doaj +2 more sources
【目的】本文旨在通过时空统计与聚类分析方法,系统揭示上海市不同等级降雨的时空分布规律,重点解析暴雨的时空异质性特征及城郊差异,为城市内涝防治与规划提供科学依据。【方法】基于2014年—2017年上海市160个雨量站观测数据,采用K-Means聚类算法对24 h暴雨过程进行雨型分类,运用统计分析方法量化城郊暴雨差异,并结合地理信息系统(GIS)空间插值技术刻画暴雨的时空分布格局。【结果】小雨、中雨和大雨的雨量在上海市各区分布较均匀,雨日分布规律各有不同;上海市暴雨呈现显著时空异质性 ...
Lan Jiani +5 more
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2019年8月10日6时至12日6时,受台风"利奇马"影响,山东淄博、东营、潍坊等地区发生特大暴雨天气,造成了严重的水土流失灾害。暴雨发生后,水利部水土保持监测中心组织调查人员,运用现代技术手段对暴雨中心典型小流域进行了系统、全面的水土保持实地调查。结果表明:(1)本次特大暴雨降雨量为570.6 mm,最大24 h降雨507.6 mm,均超过历史记录;(2)本次暴雨造成严重水土流失灾害,典型小流域水蚀模数达9 741 t/km2,是多年平均值的2.4倍,梯田损毁率达5.96%,河道淤积厚度达10~30 ...
林祚顶 +6 more
doaj
Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey +2 more
wiley +1 more source
How Many Floods Have Occurred in China in the Past Decade? A Perspective From Social Media
Abstract Global climate change has led to frequent and widespread flood disasters in China. Traditional flood disaster investigations mainly focus on major flood events, and small‐scale flood events are often overlooked. This study utilized the Sina Weibo social media platform to detect flood events in 370 cities in China from 2012 to 2023.
D. Shen +5 more
wiley +1 more source
This paper introduces a cost‐effective prompt optimization strategy for ancient Chinese word segmentation using large language models, aiming to mitigate the substantial computational resources and training expenses of fine‐tuning. We developed two knowledge‐enhanced frameworks, a General Knowledge Prompt framework and a Domain‐Specific Knowledge ...
Meng-Tian Tang +2 more
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Abstract Background Canine atopic dermatitis (cAD) is a hereditary, generally pruritic and predominantly T‐cell‐driven inflammatory skin disease, involving an interplay between skin barrier abnormalities, allergen sensitisation and microbial dysbiosis.
L. Widorn +2 more
wiley +1 more source
Comparison of the upper northeasterly flow with and without heavy rain(高空偏北大风与有无暴雨的对比分析)
利用常规观测资料对1991~1996年江淮地区梅雨期的高、低层流场进行合成诊断分析.比较了高空偏北大风下有无暴雨在天气形势、物理量特征、三维流场方面的差异.文中一些分析结果可供暴雨预报参考.
DINGHua-jun(丁华君) +1 more
doaj +1 more source
利用NCEP再分析资料、MICAPS资料、常规自动站资料对台风“麦德姆”过程进行综合分析,主要对其在浙江中南部和西部造成的暴雨成因作诊断分析.结果表明:(1)副高外围气流为麦德姆移动路径起着关键的引导作用;(2)暴雨区上空较强的水汽通量、高温高湿的湿能量积聚、不稳定的大气层结以及持续长时间的上升运动都为暴雨发生提供了有利条件;(3)根据湿位涡分析,本次过程是一次对流不稳定和斜压不稳定均存在、以对流不稳定为主的台风暴雨过程.暴雨区发生在MPV1负值中心附近,尤其700 hPa的MPV1值指示效果最好 ...
GUOQiaohui(郭巧慧), SHENJiao(沈娇)
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