Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027888 |
Regional Hydroclimatic Variability Due To Contemporary Deforestation in Southern Amazonia and Associated Boundary Layer Characteristics | |
Khanna, Jaya1,2; Medvigy, David1,3; Fisch, Gilberto4; de Araujo Tiburtino Neves, Theomar Trindade5 | |
2018-04-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:8页码:3993-4014 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Brazil |
英文摘要 | Amazonian deforestation causes systematic changes in regional dry season precipitation. Some of these changes at contemporary large scales (a few hundreds of kilometers) of deforestation have been associated with a dynamical mesoscale circulation, induced by the replacement of rough forest with smooth pasture. In terms of decadal averages, this dynamical mechanism yields increased precipitation in downwind regions and decreased precipitation in upwind regions of deforested areas. Daily, seasonal, and interannual variations in this phenomenon may exist but have not yet been identified or explained. This study uses observations and numerical simulations to develop relationships between the dynamical mechanism and the local- and continental-scale atmospheric conditions across a range of time scales. It is found that the strength of the dynamical mechanism is primarily controlled by the regional-scale thermal and dynamical conditions of the boundary layer and not by the continental- and global-scale atmospheric state. Lifting condensation level and wind speed within the boundary layer have large and positive correlations with the strength of the dynamical mechanism. The strength of these relationships depends on time scale and is strongest over the seasonal cycle. Overall, the dynamical mechanism is found to be strongest during times when the atmosphere is relatively stable. Hence, for contemporary large scales of deforestation this phenomenon is found to be the prevalent convective triggering mechanism during the dry and parts of transition seasons (especially during the dry-to-wet transition), significantly affecting the hydroclimate during this period. |
英文关键词 | Amazon Rondonia deforestation precipitation seasonality surface roughness dynamical circulation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433071200010 |
WOS关键词 | DRY-SEASON ; CLIMATE-CHANGE ; LAND-SURFACE ; RAIN-FOREST ; BASIN ; MODEL ; SIMULATIONS ; IMPACT ; WET ; PARAMETERIZATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32445 |
专题 | 气候变化 |
作者单位 | 1.Princeton Univ, Program Atmospher & Ocean Sci, Princeton, NJ 08544 USA; 2.Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA; 3.Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46556 USA; 4.Dept Aerosp Sci & Technol, Sao Jose Dos Campos, Brazil; 5.Fed Univ West Para, Atmospher Sci, Santarem, Brazil |
推荐引用方式 GB/T 7714 | Khanna, Jaya,Medvigy, David,Fisch, Gilberto,et al. Regional Hydroclimatic Variability Due To Contemporary Deforestation in Southern Amazonia and Associated Boundary Layer Characteristics[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(8):3993-4014. |
APA | Khanna, Jaya,Medvigy, David,Fisch, Gilberto,&de Araujo Tiburtino Neves, Theomar Trindade.(2018).Regional Hydroclimatic Variability Due To Contemporary Deforestation in Southern Amazonia and Associated Boundary Layer Characteristics.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(8),3993-4014. |
MLA | Khanna, Jaya,et al."Regional Hydroclimatic Variability Due To Contemporary Deforestation in Southern Amazonia and Associated Boundary Layer Characteristics".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.8(2018):3993-4014. |
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