北纬 82°以上北极吹尘事件的卫星观测结果

IF 2.3 4区地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES

Weather Pub Date : 2024-08-23 DOI:10.1002/wea.7617

Matthew Baddock, Alex Hall, Joseph Rideout, Rob Bryant, Joanna Bullard, Santiago Gassó

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引用次数: 0

摘要

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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Satellite observations of Arctic blowing dust events >82°N

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.

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来源期刊

Weather METEOROLOGY & ATMOSPHERIC SCIENCES-

CiteScore

2.80

自引率

5.30%

发文量

191

审稿时长

6-12 weeks

期刊介绍： The aim of Weather is to act as a bridge between the interests of those having a professional and a general interest in the weather, as well as between meteorologists and others working in related sciences such as climatology, hydrology and geography. Articles and regular features are written for a wide range of readers, from professional meteorologists to amateur weather observers. While technical language and mathematical content are kept to a minimum, Weather also seeks to inform and to give readers an opportunity to update their subject knowledge. Weather is also the ''house journal'' of the Society and seeks to keep the reader up-to-date with Society news and includes meeting and conference reports, a Readers'' Forum series and occasional Viewpoint articles. Photographs of weather events are an important feature of the journal and the Weather Image feature provides an opportunity to analyse a satellite image or photograph. Weather Log is a summary of the weather of each month by means of meteorological data and weather maps.