| DOI: | 10.2172/1174257
|
| 报告号: | Final Report:Berkeley--5130-1
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| 报告题名: | Using a Regional Cluster of AmeriFlux Sites in Central California to Advance Our Knowledge on Decadal-Scale Ecosystem-Atmosphere Carbon Dioxide Exchange |
| 作者: | Baldocchi, Dennis
|
| 出版年: | 2015
|
| 发表日期: | 2015-03-24
|
| 总页数: | 9
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| 国家: | 美国
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| 语种: | 英语
|
| 英文关键词: | eddy covariance, ameriflux, fluxnet, net carbon exchange, savanna, annual grassland, ecosystem ecology
|
| 中文主题词: | 碳
; 水蒸汽
; 高温
; 二氧化碳
; 激光雷达
; 雷达
|
| 主题词: | CARBON
; WATER VAPOR
; HEAT
; CARBON DIOXIDE
; LIDAR
; RADAR
|
| 英文摘要: | Continuous eddy convariance measurements of carbon dioxide, water vapor and heat were measured continuously between an oak savanna and an annual grassland in California over a 4 year period. These systems serve as representative sites for biomes in Mediterranean climates and experience much seasonal and inter-annual variability in temperature and precipitation. These sites hence serve as natural laboratories for how whole ecosystem will respond to warmer and drier conditions. The savanna proved to be a moderate sink of carbon, taking up about 150 gC m-2y-1 compared to the annual grassland, which tended to be carbon neutral and often a source during drier years. But this carbon sink by the savanna came at a cost. This ecosystem used about 100 mm more water per year than the grassland. And because the savanna was darker and rougher its air temperature was about 0.5 C warmer. In addition to our flux measurements, we collected vast amounts of ancillary data to interpret the site and fluxes, making this site a key site for model validation and parameterization. Datasets consist of terrestrial and airborne lidar for determining canopy structure, ground penetrating radar data on root distribution, phenology cameras monitoring leaf area index and its seasonality, predawn water potential, soil moisture, stem diameter and physiological capacity of photosynthesis. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1174257
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/41915
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1174257.pdf（365KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Baldocchi, Dennis. Using a Regional Cluster of AmeriFlux Sites in Central California to Advance Our Knowledge on Decadal-Scale Ecosystem-Atmosphere Carbon Dioxide Exchange. 2015-01-01.
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