DOI: 10.1002/2017JG004080
Scopus记录号: 2-s2.0-85040862744
论文题名: Lightning Forcing in Global Fire Models: The Importance of Temporal Resolution
作者: Felsberg A. ; Kloster S. ; Wilkenskjeld S. ; Krause A. ; Lasslop G.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 1 起始页码: 168
结束页码: 177
语种: 英语
英文关键词: burned area
; global fire model
; lightning
; vegetation fire
Scopus关键词: air temperature
; annual variation
; Boreal
; climate forcing
; general circulation model
; lightning
; precipitation (climatology)
; temporal variation
; wildfire
英文摘要: In global fire models, lightning is typically prescribed from observational data with monthly mean temporal resolution while meteorological forcings, such as precipitation or temperature, are prescribed in a daily resolution. In this study, we investigate the importance of the temporal resolution of the lightning forcing for the simulation of burned area by varying from daily to monthly and annual mean forcing. For this, we utilize the vegetation fire model JSBACH-SPITFIRE to simulate burned area, forced with meteorological and lightning data derived from the general circulation model ECHAM6. On a global scale, differences in burned area caused by lightning forcing applied in coarser temporal resolution stay below 0.55% compared to the use of daily mean forcing. Regionally, however, differences reach up to 100%, depending on the region and season. Monthly averaged lightning forcing as well as the monthly lightning climatology cause differences through an interaction between lightning ignitions and fire prone weather conditions, accounted for by the fire danger index. This interaction leads to decreased burned area in the boreal zone and increased burned area in the Tropics and Subtropics under the coarser temporal resolution. The exclusion of interannual variability, when forced with the lightning climatology, has only a minor impact on the simulated burned area. Annually averaged lightning forcing causes differences as a direct result of the eliminated seasonal characteristics of lightning. Burned area is decreased in summer and increased in winter where fuel is available. Regions with little seasonality, such as the Tropics and Subtropics, experience an increase in burned area. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114750
Appears in Collections: 气候减缓与适应
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作者单位: Land in the Earth System, Max Planck Institute for Meteorology, Hamburg, Germany; Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
Recommended Citation:
Felsberg A.,Kloster S.,Wilkenskjeld S.,et al. Lightning Forcing in Global Fire Models: The Importance of Temporal Resolution[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(1)