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Satellite observations of Arctic blowing dust events >82°N 北纬 82°以上北极吹尘事件的卫星观测结果
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-23 DOI: 10.1002/wea.7617
Matthew Baddock, Alex Hall, Joseph Rideout, Rob Bryant, Joanna Bullard, Santiago Gassó
This study reports satellite evidence for the most northerly blown dust activity yet observed on Earth. A systematic inspection of high‐resolution satellite imagery identified active dust events and their sources >82°N in Peary Land, Greenland. In the absence of any local weather measurements, for all observed dust activity a focus period in April 2020 with multiple dust plumes, reanalysis climate data found the majority of dust events to be associated with wind speeds exceeding a typical threshold value for blowing sand and dust uplift. Wind direction variability points to dust‐raising by cold airflow down‐valley winds, likely from nearby ice masses.
这项研究报告了地球上迄今观测到的最北吹尘活动的卫星证据。通过对高分辨率卫星图像的系统检查,确定了格陵兰岛皮尔陆地北纬 82 度的沙尘活动及其来源。在没有任何当地天气测量数据的情况下,对于所有观测到的沙尘活动(2020 年 4 月的一个重点时段,有多个沙尘羽流),再分析气候数据发现,大多数沙尘事件都与风速超过吹沙和沙尘上扬的典型阈值有关。风向的变化表明沙尘是由冷气流顺谷风引起的,可能来自附近的冰块。
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引用次数: 0
Tipping mechanisms in a conceptual model of the Atlantic Meridional Overturning Circulation 大西洋经向翻转环流概念模型中的倾覆机制
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-07 DOI: 10.1002/wea.7609
Ruth Chapman, Sacha Sinet, Paul D. L. Ritchie
The Atlantic Meridional Overturning Circulation (AMOC) forms an essential component of the global ocean circulation. Paleoclimate records indicate the AMOC’s capability to tip between different states that resulted in large global climate impacts. Using an AMOC box model, re‐calibrated against a global circulation model, HadGEM3, we present a new bifurcation analysis and showcase mechanisms that may lead the AMOC to tip from its current ‘on’ state to a collapsed ‘off’ state under climate change. We find that bifurcation‐ and noise‐induced tipping remain viable tipping mechanisms as in previous calibrations, while rate‐induced tipping only occurs for specific parameter configurations of this model.
大西洋经向翻转环流(AMOC)是全球海洋环流的重要组成部分。古气候记录表明,大西洋经向翻转环流有能力在不同状态之间转换,从而对全球气候产生巨大影响。利用根据全球环流模式 HadGEM3 重新校准的 AMOC 箱模型,我们提出了一种新的分叉分析方法,并展示了在气候变化下可能导致 AMOC 从当前的 "开 "状态向坍塌的 "关 "状态倾斜的机制。我们发现,分岔和噪声诱导的倾覆机制与以前的校准结果一样,仍然是可行的倾覆机制,而速率诱导的倾覆只发生在该模式的特定参数配置下。
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引用次数: 0
Rainbows 彩虹
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7604
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引用次数: 0
Weather, Vol. 79, no. 8, August 2024, pp. 246‐276 天气》,第 79 卷,第 8 期,2024 年 8 月,第 246-276 页
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.4436
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引用次数: 0
Weather images 天气图像
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7601
Dan Holley, Gemma Plumb
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引用次数: 0
Weather news 天气新闻
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7607
Steven Keates, Dan Harris
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引用次数: 0
June 2024. Very cool and showery for 2 weeks, then a late month warm spell 2024 年 6 月连续两周凉爽多雨,月末温暖如春
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7605
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引用次数: 0
Society news 社会新闻
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7606
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引用次数: 0
Cover Photograph 封面照片
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-08-02 DOI: 10.1002/wea.7603
Front cover: Cirrus castellanus over Maison St Louis Observatory, Jersey at 1925 UTC on 24 July 2022. The Camborne radiosonde profile at midday showed potential instability above 26000ft associated with a cold front between Middlesbrough and the Mouth of the English Channel at 1800 UTC (© James Galvin) image
封面:2022 年 7 月 24 日 1925UTC,泽西岛圣路易之家天文台上空的卷云。正午时分的坎伯恩无线电探空仪剖面图显示,与 1800 UTC 时米德尔斯堡和英吉利海峡口之间的冷锋有关,26000 英尺以上可能存在不稳定性(© James Galvin)。
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引用次数: 0
Cloudspotting for Beginners, GavinPretor‐Pinney and WilliamGrill (Illustrator), Particular Books, 2024, Hardback £20.00 / eBook: £10.99, 96 pp., ISBN Hardback: 978‐0‐24‐163254‐3 / eBook: 978‐1‐80‐206239‐7 Cloudspotting for Beginners》,GavinPretor-Pinney 和 WilliamGrill(插画家),Particular Books,2024 年,精装本 20.00 英镑/电子书:10.99 英镑,96 页,ISBN 精装本:978-0-24-163254-3/电子书:978-1-80-206239-7。
IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Pub Date : 2024-07-30 DOI: 10.1002/wea.7608
Edward Graham
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引用次数: 0
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