A Quantitative Assessment of Vertical Wave Energy Flux and Global Wave Power Due To Upward Propagating Tides Based on TIMED Observations

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Geophysical Research Letters Pub Date : 2025-01-21 DOI:10.1029/2024GL113527

Mukta Neogi, Jens Oberheide

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Abstract

We quantify the vertical wave energy flux and global wave power due to upward propagating tides in the 80–200 km altitude range, based on observations. Our approach utilizes fluid dynamical equations, and Hough Mode Extension (HME) fits to tidal wind and temperatures observed by the TIDI and SABER instruments on board the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite. The global annual mean vertical energy flux due to diurnal and semidiurnal migrating and non-migrating tides for the year 2009 (solar minimum conditions) is about $10^{- 5}$ W/m² or equivalent to 5 GW of global wave power at 100 km. Observation-based wave energy flux values for the migrating diurnal and semidiurnal tidal components DW1 and SW2 for spring 2009 equinox conditions compare well with SD-WACCM-X predicted values but are somewhat smaller than early theoretical results. We find that SW2 is the most dominant tidal component contributing to wave energy throughout the thermosphere.

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基于 TIMED 观测数据的垂直波能量通量和向上传播潮汐引起的全球波动力定量评估

根据观测结果，量化了80-200 km高度范围内潮汐向上传播引起的垂直波能通量和全球波能。我们的方法利用流体动力学方程，霍夫模式扩展（HME）拟合了热层-电离层-中间层能量与动力学（TIMED）卫星上的TIDI和SABER仪器观测到的潮汐风和温度。2009年（太阳极小期条件）由日、半日迁移和非迁移潮汐引起的全球年平均垂直能量通量约为10 -5 ${10}^{-5}$ W/m2，或相当于100公里处全球波能的5吉瓦。2009年春分条件下迁移日、半日潮分量DW1和SW2的观测波能通量值与SD-WACCM-X的预测值比较好，但略小于早期的理论结果。我们发现SW2是在整个热层中贡献波浪能的最主要潮汐分量。

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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.