Income and extratropical cyclones in New Zealand

Roy, Apurba; Noy, Ilan; Cuffe, Harold E.

doi:10.1016/j.jenvman.2022.114852

Cited by 5 publications

(1 citation statement)

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“…These PTCs are still often associated with extreme precipitation, high winds, and can cause loss of life and property around the globe (Blake et al, 2013;Meltzer et al, 2021;Roy et al, 2022;Sainsbury et al, 2020;Stewart, 2018). Therefore, it is important to characterize PTC storm and precipitation structures to acquire a more complete understanding of kinematic and thermodynamic processes occurring throughout the TC lifecycle.…”

Section: Introductionmentioning

confidence: 99%

Using Satellite Observations of Lightning and Precipitation to Diagnose the Behavior of Deep Convection in Tropical Cyclones Traversing the Midlatitudes

Heuscher,

Gatlin,

Petersen

2023

Preprint

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This study uses a unique combination of geostationary and low-Earth orbiting satellite-based observations of lightning and precipitation, respectively, to examine the evolution of deep convection during the tropical cyclone (TC) lifecycle. The study spans the Atlantic Basin hurricane seasons of 2018-2021 and is unique as it provides the first known analysis of total lightning (intra cloud and cloud to ground) observed in TCs through their extratropical transition and post-tropical cyclone (PTC) phases. We consider the TC lifecycle stage, geographic location (e.g., land, coast, ocean), shear strength, and quadrant relative to the storm motion and environmental shear vectors. Total lightning maxima are found in the forward right quadrant relative to storm motion and downshear of the TC center, consistent with previous studies using mainly cloud-to-ground lightning. Increasing environmental shear focuses the lightning maxima to the downshear right quadrant with respect to the shear vector in tropical storm phases. Vertical profiles of radar reflectivity from the Global Precipitation Measurement mission show that super-electrically active convective precipitation features (>100 flashes) within the PTC phase of TCs have deeper mixed phase depths and higher reflectivity at -10°C than other phases, indicating the presence of more intense convection. Differences in the net convective behavior observed throughout TC evolution manifest in both the TC-scale frequency of lightning-producing cells and the intensity variations of amongst individual convective cells. The combination of continuous lightning observations and precipitation snapshots improves our understanding of convective-scale processes in TCs, especially in PTC phases, as they traverse the tropics and mid-latitudes.

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Section: Introductionmentioning

confidence: 99%