2023年10月14日日环食期间热层中性温度变化的GOLD观测

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-01-23 DOI:10.1029/2024gl110676

Saurav Aryal, J. Scott Evans, Jerry D. Lumpe, Fazlul I. Laskar, Quan Gan, Wenbin Wang, Richard W. Eastes

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引用次数: 0

摘要

2023年10月14日，从美国太平洋海岸到巴西东海岸都可以看到日环食。在日食期间，NASA的全球尺度翼盘观测（GOLD）任务在17至20 UT之间从西经47.5°以上的地球静止轨道观测到第一次天气热层温度变化。这些白天的热层变化是通过GOLD的圆盘远紫外线（FUV）测量得出的。与前一天（基线）相比，在峰值环状附近可以看到白天磁盘温度（~ 100 K）的显著下降。温度下降的空间形态也与日食阴影相似。以前对其他日食的模拟研究通常显示温度下降幅度要小得多(~ 30-40 K；（低2-3倍）。这些首次的结果为热层和电离层耦合系统对瞬态太阳事件（包括日食）的动态响应提供了新的见解。

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GOLD Observations of Thermospheric Neutral Temperature Variability During the 14 October 2023 Annular Solar Eclipse

The 14 October 2023 annular solar eclipse was visible from the US Pacific coast to Brazil's east coast. NASA's Global-scale Observations of Limb and Disk (GOLD) mission observed the first synoptic thermospheric temperature changes from a geo-stationary orbit above 47.5°W longitude between 17 and 20 UT during the eclipse. These daytime thermospheric changes were derived using GOLD's disk far ultraviolet (FUV) measurements. A significant decrease in the daytime disk temperatures (∼100 K) was seen near the peak annularity compared to the day before (baseline). The temperature reduction's spatial morphology is also like that of the eclipse shadow. Previous modeling studies of other eclipses typically show a much smaller temperature decrease (∼30–40 K; a factor of 2–3 lower) compared to GOLD observations. These first of kind results provide new insight into the dynamic response of the coupled thermosphere and ionosphere system to transient solar events, including eclipses.

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.