globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12538
论文题名:
Synchronous fire activity in the tropical high Andes: An indication of regional climate forcing
作者: Román-Cuesta R.M.; Carmona-Moreno C.; Lizcano G.; New M.; Silman M.; Knoke T.; Malhi Y.; Oliveras I.; Asbjornsen H.; Vuille M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:6
起始页码: 1929
结束页码: 1942
语种: 英语
英文关键词: Andes ; Climate change ; ENSO ; Fire ; Fuel load ; Grasslands ; MEI ; Paramo ; Precipitation ; Puna
Scopus关键词: climate change ; climate forcing ; climate modeling ; El Nino-Southern Oscillation ; fire ; global climate ; grassland ; precipitation (climatology) ; regional climate ; Andes ; Bolivia ; Colombia ; La Paz [Bolivia] ; Puna ; Yungas ; altitude ; climate ; climate change ; ecosystem ; fire ; forest ; grassland ; human ; South America ; tundra ; Altitude ; Climate ; Climate Change ; Ecosystem ; Fires ; Forests ; Grassland ; Humans ; South America ; Tundra
英文摘要: Global climate models suggest enhanced warming of the tropical mid and upper troposphere, with larger temperature rise rates at higher elevations. Changes in fire activity are amongst the most significant ecological consequences of rising temperatures and changing hydrological properties in mountainous ecosystems, and there is a global evidence of increased fire activity with elevation. Whilst fire research has become popular in the tropical lowlands, much less is known of the tropical high Andean region (>2000masl, from Colombia to Bolivia). This study examines fire trends in the high Andes for three ecosystems, the Puna, the Paramo and the Yungas, for the period 1982-2006. We pose three questions: (i) is there an increased fire response with elevation? (ii) does the El Niño- Southern Oscillation control fire activity in this region? (iii) are the observed fire trends human driven (e.g., human practices and their effects on fuel build-up) or climate driven? We did not find evidence of increased fire activity with elevation but, instead, a quasicyclic and synchronous fire response in Ecuador, Peru and Bolivia, suggesting the influence of high-frequency climate forcing on fire responses on a subcontinental scale, in the high Andes. ENSO variability did not show a significant relation to fire activity for these three countries, partly because ENSO variability did not significantly relate to precipitation extremes, although it strongly did to temperature extremes. Whilst ENSO did not individually lead the observed regional fire trends, our results suggest a climate influence on fire activity, mainly through a sawtooth pattern of precipitation (increased rainfall before fire-peak seasons (t-1) followed by drought spells and unusual low temperatures (t0), which is particularly common where fire is carried by low fuel loads (e.g., grasslands and fine fuel). This climatic sawtooth appeared as the main driver of fire trends, above local human influences and fuel build-up cyclicity. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62148
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作者单位: CREAF. Centre for Ecological Research and Forestry Applications, Universitat Autonoma de Barcelona, Facultat de Ciencies. Unitat d' Ecologia, Bellaterra, Barcelona, 08193, Spain; Institute of Forest Management, Technische Universität München, Center of Life and Food Sciences Weihenstephan, Hans-Carl-von-Carlowitz-Platz 2, Freising, 85354, Germany; Global Environmental Monitoring Unit, Institute for Environment and Sustainability, European Commission, Joint Research Centre, TP. 440 21020, Ispra, Varese, 21027, Italy; School of Geography and the Environment, Oxford University, South Parks Road, Oxford, OX13QY, United Kingdom; Wake Forest University, Box 7325 Reynolda Station, Winston Salem, NC, 27109-7325, United States; Environmental Change Institute, School of Geography and the Environment, Oxford University, South Parks Road, Oxford, OX13QY, United Kingdom; College of Life Sciences and Agriculture Durham, University of New Hampshire, Durham, NH, United States; Department of Atmospheric and Environmental Sciences Albany, University of Albany, Albany, NY, United States; African Climate and Development Initiative, University of Cape Town, Rondebosch, 7701 Cape Town, South Africa; Nature Conservation and Plant Ecology, Wageningen Institute for Environment and Climate Research, Building Number 100, Droevendaalsesteeg 3a, 6708 PB, Wageningen, Netherlands

Recommended Citation:
Román-Cuesta R.M.,Carmona-Moreno C.,Lizcano G.,et al. Synchronous fire activity in the tropical high Andes: An indication of regional climate forcing[J]. Global Change Biology,2014-01-01,20(6)
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