DOI: 10.1175/JCLI-D-11-00259.1
Scopus记录号: 2-s2.0-84862740898
论文题名: Simulated links between deforestation and extreme cold events in South America
作者: Medvigy D. ; Walko R.L. ; Avissar R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 11 起始页码: 3851
结束页码: 3866
语种: 英语
Scopus关键词: Adaptive models
; Amazon region
; Atmosphere-land interaction
; Characteristic length
; Cold air
; Extreme events
; Human population
; Limited area models
; Modeling studies
; Natural ecosystem
; Potential change
; South America
; Subtropical jet
; Temperature changes
; Variable resolution
; Climate control
; Climatology
; Mathematical models
; Deforestation
; annual variation
; atmosphere-biosphere interaction
; atmospheric general circulation model
; cold air
; deforestation
; extreme event
; modeling
; temperature effect
; Amazonia
英文摘要: Many modeling studies have indicated that deforestation will increase the average annual temperature in the Amazon. However, few studies have investigated the potential for deforestation to change the frequency and intensity of extreme events. This problem is addressed here using a variable-resolution GCM. The characteristic length scale (CLS) of the model's grid mesh over South America is 25 km, comparable to that used by limited-area models. For computational efficiency, the CLS increases to 200 km over the rest of the world. It is found that deforestation induces large changes in the frequency of wintertime extreme cold events. Large increases in cold event frequency and intensity occur in the western Amazon and, surprisingly, in parts of southern South America, far from the actual deforested area. One possible mechanism for these remote effects involves changes in the position of the subtropical jet, caused by temperature changes in the Amazon. Increased understanding of these potential changes in extreme events will be important for local agriculture, natural ecosystems, and the human population. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52366
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geosciences, Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
Recommended Citation:
Medvigy D.,Walko R.L.,Avissar R.. Simulated links between deforestation and extreme cold events in South America[J]. Journal of Climate,2012-01-01,25(11)