DOI: 10.1002/joc.5797
Scopus记录号: 2-s2.0-85054172067
论文题名: Fine-scale climate variability in a complex terrain basin using a high-resolution weather station network in southeastern Brazil
作者: Martin T.C. ; da Rocha H.R. ; Joly C.A. ; Freitas H.C. ; Wanderley R.L. ; da Silva J.M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 1 起始页码: 218
结束页码: 234
语种: 英语
英文关键词: Atlantic forest
; complex terrain
; montane climate
; mountain wind
; terrestrial lapse rate
; valley wind
Scopus关键词: Catchments
; Climatology
; Complex networks
; Runoff
; Thermal gradients
; Weather information services
; Wind
; Atlantic forest
; Complex terrains
; Lapse rate
; montane climate
; Valley winds
; Landforms
; atmospheric lapse rate
; climate variation
; complex terrain
; mountain environment
; spatial variation
; temporal variation
; weather station
; wind
; Brazil
英文摘要: Montane climates are shaped by high spatial variability that depends on net radiation and synoptic weather, and much on elevation and topographic features of terrain. We measured near-ground meteorological variables using a weather station network during 14 months, in a valley-shaped basin in southeast Brazil, to address the spatiotemporal climate variability at the meso-γ atmospheric scale. The terrestrial climatic gradients were evident in the cross-valley direction of the basin, where the valley tended to warm/wet up at day and cool/dry down at night relatively from the slopes. The temperature at noon showed high variability and decreased at a mean gradients of about −0.7 °C (100 m) −1 . The nocturnal air temperature increased with height up to a maximum at about 200 m (the thermal belt), and showed seasonal rates higher/less in dry/wet season of +1.1/+0.2 °C (100 m) −1 over the full altitude. The vapour pressure decreased from the valley bottom upwards, in general below −0.5 hPa (100 m) −1 , whereas the wind speed increased at a rate of 0.9 m s −1 (100 m) −1 . We noted significant differential warming along the valley and mountain sides. The middle valley was circumstantially colder at night and warmer at daytime, relatively to the upper catchment, under mean magnitudes below 1.0 °C. The west slope at upper catchment was slightly warmer at night, and colder in the afternoon, at magnitudes below 0.5 °C, highlighting the control of hills’ aspect at daytime, and the sheltering to flow aloft in east side. The cross-valley gradients appeared to be well associated with local circulation, where downslope wind and positive temperature gradients, as well as upslope wind and negative temperature gradients strictly coexisted during the morning. The terrestrial gradients and the thermal circulation were in general dampened by cloudiness and mechanical mixing. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116651
Appears in Collections: 全球变化的国际研究计划
There are no files associated with this item.
作者单位: Departamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo (USP), São Paulo, Brazil; Departamento de Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil; Departamento de Física, Faculdade de Ciências, Universidade Estadual Paulista, Bauru, Brazil; Instituto de Energia e Ambiente, Universidade de São Paulo (USP), São Paulo, Brazil; Departamento de Ciências Atmosféricas e Climáticas, Universidade Federal do Rio Grande do Norte, Natal, Brazil
Recommended Citation:
Martin T.C.,da Rocha H.R.,Joly C.A.,et al. Fine-scale climate variability in a complex terrain basin using a high-resolution weather station network in southeastern Brazil[J]. International Journal of Climatology,2019-01-01,39(1)