Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028719 |
Simulation of Longwave Enhancement in Boreal and Montane Forests | |
Todt, M.1; Rutter, N.1; Fletcher, C. G.2; Wake, L. M.1; Bartlett, P. A.3; Jonas, T.4; Kropp, H.5; Loranty, M. M.5; Webster, C.4,6 | |
2018-12-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:24页码:13731-13747 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Canada; Switzerland; USA; Scotland |
英文摘要 | Boreal forests cover about a fifth of seasonally snow-covered land over the Northern Hemisphere. Enhancement of longwave radiation beneath coniferous forests has been found to impact the surface energy balance and rates of snowmelt. Although the skill of model-simulated snowmelt has been shown to be lower for forests than for open areas, model intercomparisons and evaluations of model parameterizations have not yet focused on longwave enhancement. This study uses stand-scale forcing for the simulation of subcanopy longwave radiation by Community Land Model version 4.5 (CLM4.5) and to drive SNOWPACK, a snow model featuring more complex canopy structure, as a benchmark model for CLM4.5. Simulated subcanopy longwave radiation and longwave enhancement are assessed using measurements from forest stands located within perennially snow-covered regions. These forest stands, of varying canopy density, cover the range of boreal plant functional types in CLM4.5. CLM4.5 is found to overestimate the diurnal range of subcanopy longwave radiation and longwave enhancement, and simulation errors increase with decreasing cloudiness and increasing vegetation density. Implementation of a parameterization of heat storage by biomass reduces simulation errors but only marginally affects the amplitude of diurnal ranges. These results reaffirm previous findings that simulation of subcanopy longwave radiation can be improved by partitioning the vegetation canopy into two layers. Moreover, this study reveals the variations of simulation errors across meteorological conditions and vegetation density, the latter of which is the most important parameter for longwave enhancement independent of vegetation type. |
英文关键词 | longwave radiation canopy radiative transfer boreal forest vegetation density land surface model model intercomparison |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455876300007 |
WOS关键词 | SNOW ACCUMULATION ; ENERGY-BALANCE ; RADIATION ; CANOPY ; CLIMATE ; PHOTOGRAPHY ; MODELS ; TRENDS ; TREES |
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/33689 |
专题 | 气候变化 |
作者单位 | 1.Northumbria Univ, Dept Geog, Newcastle Upon Tyne, Tyne & Wear, England; 2.Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada; 3.Environm & Climate Change Canada, Climate Res Div, Toronto, ON, Canada; 4.WSL Inst Snow & Avalanche Res SLF, Davos, Switzerland; 5.Colgate Univ, Dept Geog, Hamilton, NY 13346 USA; 6.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland |
推荐引用方式 GB/T 7714 | Todt, M.,Rutter, N.,Fletcher, C. G.,et al. Simulation of Longwave Enhancement in Boreal and Montane Forests[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(24):13731-13747. |
APA | Todt, M..,Rutter, N..,Fletcher, C. G..,Wake, L. M..,Bartlett, P. A..,...&Webster, C..(2018).Simulation of Longwave Enhancement in Boreal and Montane Forests.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(24),13731-13747. |
MLA | Todt, M.,et al."Simulation of Longwave Enhancement in Boreal and Montane Forests".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.24(2018):13731-13747. |
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