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| Duong, Quoc-phi; Langlade, Sébastien; Payan, Christophe; Husson, Romain; Mouche, Alexis; Malardel, Sylvie. |
| Tropical cyclone (TC) monitoring and forecast in the South West Indian Ocean (SWIO) basin remain challenging, notably because of the lack of direct observations. During the 2018–2019 cyclone season, S-1 Sentinel SAR images were acquired, as part of the ReNovRisk-Cyclone research program, giving access to unprecedented detailed TC wind structure description without wind speed limitation. This paper assesses the quality of these data and the impact of their assimilation for TC forecasts. SAR observations are compared with analyses from a convection-permitting, limited area model AROME OI 3D-Var and with wind products used for operational TC monitoring. Their bias depends on the angle of incidence of the radar and the observation error is larger for extreme... |
| Tipo: Text |
Palavras-chave: SAR; 3D-Var; Data assimilation; Tropical cyclone; Sentinel; IDAI; GELENA. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00692/80373/83490.pdf |
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| SÃO JOSÉ, F. F. DE; NOVO, Y. C. DE C.; FARIAS, A. R.; MAGALHÃES, L. A.; FONSECA, M. F.. |
| Esta publicação apresenta materiais, métodos e resultados obtidos nas atividades de mapeamento de viveiros escavados em âmbito nacional, realizado por equipe especialista. A identificação dessas estruturas da cadeia produtiva aquícola nacional no território pode contribuir para o desenvolvimento de políticas públicas mais assertivas para o setor, subsidiando decisões nas esferas pública e privada. O trabalho também traz à tona a necessidade de novas pesquisas para a aplicação de técnicas automatizadas e recursos tecnológicos da área de sensoriamento remoto que permitam maior agilidade na manutenção, complementação e atualização da base de dados dos viveiros escavados, de suma importância para o planejamento territorial visando a competitividade e... |
| Tipo: Folhetos |
Palavras-chave: Agropecuária; Geoprocessamento; Sentinel. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1152279 |
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| RAGUSA-NETTO,J.. |
| Bird mixed flocks including Cypsnagra hirundinacea and Neothraupis fasciata as species with sentinels were studied in "campo-cerrado" in order to investigate the possible relationship between alertness and the mixed flock leadership. This study was conducted from March to September 1996 and mixed flocks were observed on average for 2:30h. The time with sentinels were recorded for C. hirundinacea and N. fasciata. The sentinels of Cypsnagra hirundinacea performed most of the vigilance (time with sentinel was on average 42 ± 17%, 41 ± 17% of which by C. hirundinacea, whereas only 1.2 % by N. fasciata) and gave all the alarm calls recorded (54% of the encounters with raptors stimulated alarm calls). A relationship was verified between time with sentinel and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mixed flock; Sentinel; Thraupinae; Raptors; Nuclear species. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300011 |
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