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DOI | 10.1002/joc.5068 |
Influences of the seasonal growth of vegetation on surface energy budgets over middle to high latitudes | |
Zhu, Jiawen1; Zeng, Xiaodong1,2 | |
2017-10-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The feedbacks of vegetation growth to climate are very important and exhibit large differences, depending on seasons and characteristics of plants and climate. Through two simulations, this work investigated these differences among the influences of the seasonal growth of different vegetation on surface energy budgets over the latitudinal range of 30-90 degrees N and detected associated causes. The seasonal growth of vegetation is expressed as an increase in leaf area index (LAI) during the growing season (April-October) compared to boreal winter (December-January-February). The results showed that notable effects occurred in latent heat flux, downward solar radiation and reflected solar radiation for dominant plant functional types (PFTs). With a seasonal increase in LAI, the latent heat flux of needleleaf evergreen boreal tree' (NEB) decreased, while it increased for the other dominant PFTs. Such unexpected behaviours of NEB were mainly contributed by the weak changes in its transpiration, which was associated to land-atmosphere feedbacks (the decreased downward solar radiation) and competitions among PFTs (the intensified transpirations of the deciduous vegetation PFTs). Surface downward solar radiation decreased for all dominant vegetation PFTs because of more low clouds. The reflected solar radiation of broadleaf deciduous temperate tree' increased along with increased LAI because its leaf albedo is higher than that of the background soil, and the reflected solar radiation of broadleaf deciduous boreal shrub' drastically decreased during April and May, which resulted from its interactions with accumulated snow. This paper sufficiently proves that the feedbacks of different vegetation to surface energy balance could vary widely, not only in magnitudes but also in directions. Therefore, it is very important to accurately parameterize vegetation phenology and optical properties for a better representation of vegetation-climate interactions. |
英文关键词 | seasonal growth of vegetation leaf area index surface energy balance land-atmosphere interaction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412095400002 |
WOS关键词 | LEAF-AREA INDEX ; GENERAL-CIRCULATION MODELS ; ROUGHNESS LENGTH ; CLIMATE ; FOREST ; FEEDBACKS ; CANOPY ; TEMPERATURE ; RESISTANCE ; EXCHANGES |
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/37707 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Int Ctr Climate & Environm Sci, Beijing, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Zhu, Jiawen,Zeng, Xiaodong. Influences of the seasonal growth of vegetation on surface energy budgets over middle to high latitudes[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(12). |
APA | Zhu, Jiawen,&Zeng, Xiaodong.(2017).Influences of the seasonal growth of vegetation on surface energy budgets over middle to high latitudes.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(12). |
MLA | Zhu, Jiawen,et al."Influences of the seasonal growth of vegetation on surface energy budgets over middle to high latitudes".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.12(2017). |
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