Pimenta, Alexandre AlvaresBatista, Paulo PradoAndrioli, Vania FatimaFagundes, Paulo RobertoBatista, Inez Staciarini2025-03-182025-03-18https://repositorio.univap.br/handle/123456789/709Our observations show that on some occasions an influx of meteor ablation possibly contributes to appearance of a sudden enhancement in mesospheric sodium density. On July 05, 2013, all-sky images with a narrow sodium filter in the 589 nm emission, operating at Cachoeira Paulista (22.7 S, 45 W) and lidar observations of the mesospheric sodium layer, operating at Sa˜o Jose´ dos Campos (23.1 S, 45.9 W), both observatories in Brazil, show a possible relationship of meteor disintegration and appearance of sodium enhancements on the background layer. After the meteor impact, the all-sky images showed a sodium cloud that was seen for about 10 min through the images in the NaD 589 nm emission, with initial dimensions of approximately 36 km 9 km and initial speed of about 90 m/s southward. In addition, our observations show that the movement of sodium cloud in the horizontal plane around 90 km is relatively anisotropic and change the dimensions with timePDFen-USArtigos de PeriódicosAdvances in Space Research10.1016/j.asr.2021.11.028Sodium LidarAll-sky imagesSodium cloudPIMENTA, Alexandre Alvares et al. Possible relationship of meteor disintegration in the mesosphere and enhancement of sodium atoms: A case study on july 05, 2013. Advances in Space Research, v. 69, n. 3, p. 1344-1350, 2022. Disponível em:Instituto Nacional de Pesquisas EspaciaisNational Space Science CenterUniversidade do Vale do Paraíba