Two-way coupled long-wave isentropic ocean-atmosphere dynamics

Winn, Stephen D.; Sarmiento, A. F.; Alferez, Nicolas; Touber, Emile

doi:10.1017/jfm.2023.131

Cited by 3 publications

(10 citation statements)

References 67 publications

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“…The analysis of 1-min GOES-16 regional observations reveal the presence of fluctuations of much smaller scales than reported earlier based on 10-min imagery (Winn et al, 2023;Wright et al, 2022). Our results are in agreement with Horvath et al ( 2023) who suggested similar wavelengths and periods of fluctuations over CONUS and we refer to their study for the detailed analysis of 1-min GOES satellite observations over different mesoscale regions.…”

Section: Spatial and Temporal Evolution Of Agws And Tidssupporting

confidence: 92%

Multi‐Layer Evolution of Acoustic‐Gravity Waves and Ionospheric Disturbances Over the United States After the 2022 Hunga Tonga Volcano Eruption

Inchin,

Bhatt,

Cummer

et al. 2023

AGU Advances

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The Hunga‐Tonga Hunga‐Ha'apai volcano underwent a series of large‐magnitude eruptions that generated broad spectra of mechanical waves in the atmosphere. We investigate the spatial and temporal evolutions of fluctuations driven by atmospheric acoustic‐gravity waves (AGWs) and, in particular, the Lamb wave modes in high spatial resolution data sets measured over the Continental United States (CONUS), complemented with data over the Americas and the Pacific. Along with >800 barometer sites, tropospheric observations, and Total Electron Content data from >3,000 receivers, we report detections of volcano‐induced AGWs in mesopause and ionosphere‐thermosphere airglow imagery and Fabry‐Perot interferometry. We also report unique AGW signatures in the ionospheric D‐region, measured using Long‐Range Navigation pulsed low‐frequency transmitter signals. Although we observed fluctuations over a wide range of periods and speeds, we identify Lamb wave modes exhibiting 295–345 m s−1 phase front velocities with correlated spatial variability of their amplitudes from the Earth's surface to the ionosphere. Results suggest that the Lamb wave modes, tracked by our ray‐tracing modeling results, were accompanied by deep fluctuation fields coupled throughout the atmosphere, and were all largely consistent in arrival times with the sequence of eruptions over 8 hr. The ray results also highlight the importance of winds in reducing wave amplitudes at CONUS midlatitudes. The ability to identify and interpret Lamb wave modes and accompanying fluctuations on the basis of arrival times and speeds, despite complexity in their spectra and modulations by the inhomogeneous atmosphere, suggests opportunities for analysis and modeling to understand their signals to constrain features of hazardous events.

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Section: Spatial and Temporal Evolution Of Agws And Tidssupporting

confidence: 92%

Multi‐Layer Evolution of Acoustic‐Gravity Waves and Ionospheric Disturbances Over the United States After the 2022 Hunga Tonga Volcano Eruption

Inchin,

Bhatt,

Cummer

et al. 2023

AGU Advances

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“…The global propagation of this broad far-field atmospheric pressure pulse was well reproduced by Amores et al (2022), who introduced an instantaneous sea level perturbation in a shallow water ocean model as well as by Watanabe et al (2022), who imposed an instantaneous hot anomaly over the volcano in an atmospheric general circulation model. The atmospheric Lamb wave triggered a meteotsunami, the accurate numerical simulation of which also required the imposition of such long-period and long-wavelength pressure pulses as forcing (Heinrich et al, 2023;Kubota et al, 2022;Suzuki et al, 2023;Winn et al, 2023;Yamada et al, 2022).…”

Section: The Surface Pressure Waveformmentioning

confidence: 99%

“…Several studies tracked the global propagation of the primary Lamb wave emitted by HTHH using infrared brightness temperatures from geostationary satellites (Amores et al, 2022;Matoza et al, 2022;Otsuka, 2022;Winn et al, 2023). All of these studies used full disk (FD) imagery available either at 10-min cadence from the Advanced Baseline Imager (ABI) aboard the Geostationary Operational Environmental Satellite-R series (GOES-R) and the Advanced Himawari Imager (AHI) aboard the Himawari-8 satellite or at 15-min cadence from the Spinning Enhanced Visible and Infrared Imager (SEVIRI) aboard the Meteosat Second Generation satellites.…”

mentioning

confidence: 99%

“…Studies analyzing surface pressure records or numerically simulating the atmospheric waves and the triggered meteotsunamis arrived at similar or even longer Lamb wavelengths and periods. The far-field envelope of the complex pressure wave packet can be roughly approximated by an N-wave or a positive triangular pulse of 400-900 km width and 20-50 min duration (Heinrich et al, 2023;Kubota et al, 2022;Matoza et al, 2022;Vergoz et al, 2022;Watada et al, 2023;Winn et al, 2023).…”

mentioning

confidence: 99%

“…Of the earlier studies, Wright et al (2022) used the first time derivative, while Amores et al (2022), Matoza et al (2022), Otsuka (2022), andWinn et al (2023) used the second time derivative of brightness temperatures to identify waves. However, all previous studies were based on full-disk imagery with a significantly longer sampling period of ∆t = 10 min for GOES-R and Himawari-8 and ∆t = 15 min for Meteosat.…”

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confidence: 99%

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One‐Minute Resolution GOES‐R Observations of Lamb and Gravity Waves Triggered by the Hunga Tonga‐Hunga Ha'apai Eruptions on 15 January 2022

Horváth,

Vadas,

Stephan

et al. 2024

JGR Atmospheres

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We use high temporal‐resolution mesoscale imagery from the Geostationary Operational Environmental Satellite‐R (GOES‐R) series to track the Lamb and gravity waves generated by the 15 January 2022 Hunga Tonga‐Hunga Ha'apai eruption. The 1‐min cadence of these limited area (∼1,000×1,000 km2) brightness temperatures ensures an order of magnitude better temporal sampling than full‐disk imagery available at 10‐min or 15‐min cadence. The wave patterns are visualized in brightness temperature image differences, which represent the time derivative of the full waveform with the level of temporal aliasing being determined by the imaging cadence. Consequently, the mesoscale data highlight short‐period variations, while the full‐disk data capture the long‐period wave packet envelope. The full temperature anomaly waveform, however, can be reconstructed reasonably well from the mesoscale waveform derivatives. The reconstructed temperature anomaly waveform essentially traces the surface pressure anomaly waveform. The 1‐min imagery reveals waves with ∼40–80 km wavelengths, which trail the primary Lamb pulse emitted at ∼04:29 UTC. Their estimated propagation speed is ∼315 ± 15 m s−1, resulting in typical periods of 2.1–4.2 min. Weaker Lamb waves were also generated by the last major eruption at ∼08:40–08:45 UTC, which were, however, only identified in the near field but not in the far field. We also noted wind effects such as mean flow advection in the propagation of concentric gravity wave rings and observed gravity waves traveling near their theoretical maximum speed.

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One-Minute Resolution GOES-R Observations of Lamb and Gravity Waves Triggered by the Hunga Tonga-Hunga Ha'apai Eruptions on 15 January 2022

Horváth

Vadas

Stephan

et al. 2023

Preprint

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We use high temporal-resolution mesoscale imagery from the Geostationary Operational Environmental Satellite-R (GOES-R) series to track the Lamb and gravity waves generated by the January 2022 Hunga Tonga-Hunga Ha’apai eruption. The 1-min cadence of these limited area (~1,000x1,000 km) brightness temperatures ensures an order of magnitude better temporal sampling than full-disk imagery available at 10-min or 15-min cadence. We show that previous studies using the low-cadence full-disk data considerably overestimated the horizontal wavelength (~400–500 km) and period (~20–30 min) of the Lamb wave due to spatiotemporal aliasing. The 1-min imagery reveals a leading Lamb wave with a wavelength of only ~130 km and trailing waves with even shorter wavelengths of ~40–80 km. The characteristic propagation speed is estimated at ~315±15 m s, resulting in typical periods of 2–7 min. From the time of appearance of the first detectable Lamb wave, we derive an emission time of ~04:07 UTC for the primary pressure pulse. Weaker Lamb waves were also emitted by the last major eruption at ~08:40–08:45 UTC, which were, however, only identified in the near field but not in the far field. We also noted wind effects, such as mean flow advection and critical level filtering in the propagation of concentric gravity wave rings and observed gravity waves traveling near their theoretical maximum speed.

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Two-way coupled long-wave isentropic ocean-atmosphere dynamics

Cited by 3 publications

References 67 publications

Multi‐Layer Evolution of Acoustic‐Gravity Waves and Ionospheric Disturbances Over the United States After the 2022 Hunga Tonga Volcano Eruption

Multi‐Layer Evolution of Acoustic‐Gravity Waves and Ionospheric Disturbances Over the United States After the 2022 Hunga Tonga Volcano Eruption

One‐Minute Resolution GOES‐R Observations of Lamb and Gravity Waves Triggered by the Hunga Tonga‐Hunga Ha'apai Eruptions on 15 January 2022

One-Minute Resolution GOES-R Observations of Lamb and Gravity Waves Triggered by the Hunga Tonga-Hunga Ha'apai Eruptions on 15 January 2022

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