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| DOI | 10.1088/1748-9326/ab2b4e |
| Biomass heat storage dampens diurnal temperature variations in forests | |
| Meier R.; Davin E.L.; Swenson S.C.; Lawrence D.M.; Schwaab J. | |
| 发表日期 | 2019 |
| ISSN | 17489318 |
| 卷号 | 14期号:8 |
| 英文摘要 | Observational evidence suggests that compared to non-forested areas, forests have a cooling effect on daytime land surface temperature (LST) and a warming effect on nighttime LST in many regions of the world, thus implying that forests dampen the diurnal temperature range. This feature is not captured by current climate models. Using the Community Land Model 5.0 (CLM5.0), we show that this diurnal behavior can be captured when accounting for biomass heat storage (BHS). The nighttime release of energy absorbed by the vegetation biomass during the day increases both nighttime LST and ambient air temperature in forested regions by more than 1 K. The daytime cooling is weaker than the nighttime warming effect, because the energy uptake by the biomass is compensated by a reduction in the turbulent heat fluxes during day. This diurnal asymmetry of the temperature response to BHS leads to a warming of daily mean temperatures, which is amplified during boreal summer warm extremes. Compared to MODIS, CLM5.0 overestimates the diurnal LST range over forested areas. The inclusion of BHS reduces this bias due to its dampening effect on diurnal LST variations. Further, BHS attenuates the negative bias in the nighttime LST difference of forest minus grassland and cropland, when compared to MODIS observations. These results indicate that it is essential to consider BHS when examining the influence of forests on diurnal temperature variations. BHS should thus be included in land surface models used to assess the climatic consequences of land use changes such as deforestation or afforestation. © 2019 The Author(s). Published by IOP Publishing Ltd. |
| 英文关键词 | biomass heat storage; land surface modeling; land use change |
| 语种 | 英语 |
| scopus关键词 | Air; Atmospheric temperature; Biomass; Climate models; Deforestation; Heat storage; Land use; Radiometers; Reforestation; Surface measurement; Temperature distribution; Ambient air temperature; Community land models; Diurnal temperature ranges; Diurnal temperatures; Land surface modeling; Land-use change; Temperature response; Turbulent heat fluxes; Land surface temperature; air temperature; ambient air; biomass; cooling; forest ecosystem; heat budget; heat flux; land surface; land use change; modeling; MODIS; temperature gradient |
| 来源期刊 | Environmental Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/154448 |
| 作者单位 | ETH Zurich, Institute for Atmospheric and Climate Science, Universitaetstrasse 16, Zurich, 8092, Switzerland; National Center for Atmospheric Research, Boulder, CO, United States |
| 推荐引用方式 GB/T 7714 | Meier R.,Davin E.L.,Swenson S.C.,et al. Biomass heat storage dampens diurnal temperature variations in forests[J],2019,14(8). |
| APA | Meier R.,Davin E.L.,Swenson S.C.,Lawrence D.M.,&Schwaab J..(2019).Biomass heat storage dampens diurnal temperature variations in forests.Environmental Research Letters,14(8). |
| MLA | Meier R.,et al."Biomass heat storage dampens diurnal temperature variations in forests".Environmental Research Letters 14.8(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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