标题：Air temperatures in Central Amazonia. III. - Vertical Temperature Distribution on a Clearcut Area and in a Secondary Forest near Manaus (Cold Front Conditions July 10 th. 1969)()
其他标题：Air temperatures in Central Amazonia. III. - Vertical Temperature Distribution on a Clearcut Area and in a Secondary Forest near Manaus (Cold Front Conditions July 10 th. 1969)()
摘要：Resumo As temperaturas do ar durante a friagem do dia 10 de julho de 1969, foram registradas em uma clareira e uma capoeira na Reserva Florestal Ducke. As temperaturas foram medidas em duas torres improvisadas em 8 diferentes níveis na amplitude de 10 a 900 cm de altura. A temperatura mínima absoluta do dia foi de 11.0°C, sendo excepcionalmente baixa para a Amazônia Central e aproximadamente 16.0°C abaixo da temperatura média anual da cidade de Manaus. A amplitude máxima registrada em 30 minutos foi de 8.1°C na clareira a 7 m acima do nível do solo e o mais forte impacto das baixas temperaturas na capoeira foi registrada na área das copas e perto da superfície do solo de acordo com a formação das células e das caidas de ar frio. Os perfis da temperatura na clareira e na capoeira na Reserva Florestal Ducke durante a friagem, não se enquadram com a situação estabelecida para o ambiente tropical.
其他摘要：Abstract Air temperatures under cold front conditions were recorded on July 10th 1969 inside and outside a secondary forest at Ducke Forest Reserve Air temperatures were measured at 2 towers and 8 corresponding levels ranging from 10 cm to 900 cm height. The absolute daily minimum air temperature recorded was 11.0°C, which is exceptionally low for Central Amazonia and 16.0°C below the yearly average air temperature at Manaus measured over a 45-year period of temperature records. The maximum 30-min range of air temperature was observed in the clearing (8.1°C), 7 meters above the ground. The strongest impact of air temperatures in the forest stand was recorded in the canopy area and in the ground stratum due to the formation of cold air cells and cold air sinks. The temperature profiles inside and outside the secondary forest at Ducke Forest Preserve during cold front conditions did not conform with the established temperature patterns in a tropical environment.
