Satellite observations of Arctic blowing dust events >82°N

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

引用次数: 0

Abstract

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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北纬 82°以上北极吹尘事件的卫星观测结果

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。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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

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