• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >COMPARISON OF THE NCAR LSM1 LAND SURFACE MODEL WITH BOREAS ASPEN AND JACK PINE TOWER FLUXES
【24h】

COMPARISON OF THE NCAR LSM1 LAND SURFACE MODEL WITH BOREAS ASPEN AND JACK PINE TOWER FLUXES

机译：NCAR LSM1土地表面模型与BORAS ASPEN和JACK PINE塔通量的比较

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tower fluxes measured at the Boreal Ecosystem-Atmosphere Study southern study area old aspen (SSA-OA), southern study area old jack pine (SSA-OJP), and northern study area old jack pine (NSA-OJP) sites during the three 1994 intensive field campaigns (IFCs) (May 24 to June 16 (IFC-1), July 19 to August 10 (IFC-2), and August 30 to September 19 (IFC-3)) were compared to fluxes simulated by a land surface model for the same period. Comparisons were limited to the average diurnal cycle for these periods to mitigate large day-to-day variability in the observations and problems with missing data. For consistency with the global implementation of the model, vegetation and soil parameters were not set to site-specific values but rather were the generic needleleaf evergreen and broadleaf deciduous vegetation and the generic sandy and loamy soil used in the global model. Despite the use of generic vegetation and soil, the model reasonably simulated the diurnal cycle of sensible heat, latent heat, net radiation, and CO2 fluxes for the SSA-OJP and SSA-OA sites. The main errors were that the model did not reproduce the midday reduction in latent heat seen at the SSA-OJP site during IFC-1 and IFC-2 and had less photosynthetic CO2 uptake than observed at the SSA-OA site. Differences in vegetation structure and physiology between the two sites were important to accurately simulate the fluxes. The needleleaf evergreen vegetation resulted in higher net radiation and a higher Bowen ratio than the broadleaf deciduous vegetation. Soil differences were less important. The NSA-OJP site was not so well simulated: midday latent heat flux was overestimated, and photosynthetic CO2 uptake was underestimated during each IFC. The only difference in the simulated southern and northern jack pine sites was in their atmospheric forcings; vegetation structure and soil types were the same. These results suggest the model is able to reproduce variability between vegetation types but not within vegetation types. [References: 13]
机译：1994年三个月期间，在北方生态系统-大气研究南部研究区老白杨（SSA-OA），南部研究区老杰克松（SSA-OJP）和北部研究区老杰克松（NSA-OJP）站点测量的塔通量将密集的野战（IFC）（5月24日至6月16日（IFC-1），7月19日至8月10日（IFC-2）和8月30日至9月19日（IFC-3））与陆地表面模拟的通量进行了比较同期模型。比较仅限于这些时期的平均昼夜周期，以减轻观测值和数据缺失问题的日常差异。为了与该模型的全局实施保持一致，未将植被和土壤参数设置为特定于地点的值，而是将全局模型中使用的一般针叶常绿和阔叶落叶植被以及一般沙质和壤土土壤。尽管使用了普通的植被和土壤，该模型仍合理地模拟了SSA-OJP和SSA-OA站点的感热，潜热，净辐射和CO2通量的日循环。主要错误是该模型没有重现IFC-1和IFC-2期间在SSA-OJP站点看到的潜热的午间减少，并且光合作用的二氧化碳吸收量少于在SSA-OA站点观察到的。两个站点之间植被结构和生理的差异对于准确模拟通量非常重要。针叶常绿植被比阔叶落叶植被产生更高的净辐射和更高的鲍恩比。土壤差异不太重要。 NSA-OJP站点的模拟不是很好：在每个IFC期间，高估了午间潜热通量，而低估了光合作用的二氧化碳吸收量。模拟的南部和北部千斤顶松树遗址的唯一区别在于它们的大气强迫。植被结构和土壤类型相同。这些结果表明该模型能够再现植被类型之间的变异性，但不能再现植被类型内部的变异性。 [参考：13]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号