DOI: 10.1007/s00382-014-2397-9
Scopus记录号: 2-s2.0-84940722406
论文题名: Impact of interactive vegetation phenology on the Canadian RCM simulated climate over North America
作者: Garnaud C. ; Sushama L. ; Verseghy D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-05-06 起始页码: 1471
结束页码: 1492
语种: 英语
英文关键词: Biosphere–atmosphere interactions
; Dynamic vegetation model
; Interactive phenology
; Regional modelling
英文摘要: Biosphere–atmosphere interactions play a very important role in modulating regional climate. To capture these bi-directional interactions, a dynamic vegetation model, the Canadian Terrestrial Ecosystem Model (CTEM), has been implemented in the fifth generation of the Canadian Regional Climate Model (CRCM5). CTEM can grow vegetation from bare ground and includes processes of photosynthesis, autotrophic and heterotrophic respiration, phenology, turnover, mortality and allocation. This study focuses on assessing the impact of interactive vegetation phenology, i.e. CTEM, on the CRCM5 simulated climate over North America. This is achieved by comparing two CRCM5 simulations—one with interactive phenology and the other with prescribed vegetation, driven by ECMWF reanalysis data (ERA40 and ERA-Interim) at the lateral boundaries, for the 1971–2010 period. Comparison of simulated vegetation attributes, temperature and precipitation in both simulations to those observed indicates that introduction of interactive phenology improves the performance of CRCM5 in some regions, although it introduces new biases in other regions, which are related to the underestimation of leaf area index (LAI). Interactive phenology enhances biosphere–atmosphere interactions, which are reflected in the higher values of correlation between atmosphere and biosphere variables. Interactive phenology also introduces long-term memory in CRCM5, estimated via lagged correlations between precipitation/temperature and LAI. Improved biosphere–atmosphere interactions and long-term memory in the CRCM5 simulation with interactive phenology leads to better interannual variability, particularly noticeable in the biosphere and atmosphere states during anomalously wet and dry years. This study thus provides useful insights related to the added value of interactive phenology in CRCM5 as well as the nature and variability of biosphere–atmosphere interactions over North America. © 2014, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54039
Appears in Collections: 过去全球变化的重建
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作者单位: Département des Sciences de la Terre et de l’Atmosphère, Centre ESCER, Université du Québec à Montréal, Succ. Centre-ville, C.P. 8888, Montreal, QC, Canada; Climate Processes Section, Environment Canada, Toronto, Canada
Recommended Citation:
Garnaud C.,Sushama L.,Verseghy D.. Impact of interactive vegetation phenology on the Canadian RCM simulated climate over North America[J]. Climate Dynamics,2015-01-01,45(2017-05-06)