CPEC-AZ闭路涡度相关法通量观测系统-参数-价格-中国粉体罐�/title>

该系统主朹�/span>Aerodyne闭路气体分析仪采�?/span>可调谐红外激光直接吸攵�/span>光谱＇�/span>TILDAS（�/span>技术，�?/span>中红夕�/span>激先�/span>探测气体分子，独有的像散型多光程吸收池技�?/span>有效测量光程高达210m，有效提高气体分子的测量精度，达ppt级、�/span>

该系统由Aerodyne闭路式气体分析仪、超声风速采集模块、数据整合软件、恒温机箱、采气管路等组成、�/span>

超声风速采集模块可与已有的开路涡度相关法通量观测系统共用，在超声风速仪中心设置采样管，即可完成原有的开路涡度相关法系统升级，同步观测多种气体、�/span>

农田生态系统闭路涡度相关法含氮气体通量观测

三、系统优劾�/span>

1、该系统采用皃�/span>Aerodyne闭路气体分析仪对痕量气体测量频率可达10Hz＋�/span>能完全满足涡度相关法通量观测条件，测量精度高，检测限可达ppt级。各种气体测量精度见技术指标、�/span>

2、该系统可同步观测多种气体，部分气体分子组合如下（可根据科研需要，提供近百种气体组合）９�/span>

1（�/span>N₂O�?/span>CO₂�?/span>NH₃�?/span>O₃�?/span>CO�?/span>H₂O

2)N₂O�?/span>CO₂�?/span>CH₄�?/span>COS�?/span>CO�?/span>H₂O

3（�/span>NO�?/span>NO₂�?/span>H₂O

4) N₂O�?/span>CO₂�?/span>CH₄�?/span>CO�?/span>C₂H₆�?/span>H₂O

5) HONO�?/span>HNO₃�?/span>H₂O

6) HCN�?/span>HCl

7（�/span>CH₄�?/span>C₂H₆�?/span>C₃H₈

采用活性钝化系统后＋�/span>NH3测量的时间常数和高频通量变化（时间常数更快）

3、该系统还可同步观测多种气体同位素，部分气体同位素组合如下：

1（�/span>N₂O�?/span>¹⁵N¹⁴N¹⁶O�?/span>¹⁴N¹⁵N¹⁶O�?/span>¹⁴N¹⁴N¹⁸O

2（�/span>CH₄¹³CH4�?/span>CH₃D

3（�/span>CO₂�?/span>¹³C-CO₂�?/span>¹⁷O-CO₂�?/span>¹⁸O-CO₂

4�?*技术活性钝化装置可显著提高粘性气体分子如NH₃�?/span>HONO等的响应时间，实现粘性气体和非粘性气体的同步观测，如N₂O�?/span>CO₂�?/span>NH₃�?/span>O₃�?/span>CO�?/span>H₂O

同步观测、�/span>

5�?/span>惯性颗粒物分离装置，能有效减少颗粒物附着，确保两次采样不会交叉污染、�/span>

6、该系统能够实现自动全量程校准和零点校准、�/span>

四、技术指栆�/span>

该系统可测量气体分子�?/span>1s�?00s测量精度、相应时间如下：

常见痕量温室气体９�/span>

参数	N₂O	CH₄	CO₂	NH₃	H₂O	COS	NO	NO₂	HONO
精度 1S	0.03ppb	0.1ppb	100ppb	40ppt	10ppm	0.005ppb	0.15ppb	0.03ppb	0.21ppb
精度 100S	0.01ppb	0.25ppb	25ppb	10ppt	5ppm	0.002ppb	0.15ppb	0.01ppb	75ppt
测量范围	0-10000ppb	0-10000ppb	0-5000ppm	0-10000ppb	0-5000ppm	0-5000ppm	0-5000ppm	0-5000ppm	0-5000ppm
响应时间	1-10HZ可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10H_Z可逈�/span>	1-10Hz可逈�/span>

含碳气体同位素：

参数	��¹³CH₄	��CH₃D	��¹³CH₄	CO₂	��¹³C	��¹⁸O
精度 1S	3�?/span>	30�?/span>	1�?/span>	25ppb	0.1�?/span>	0.03�?/span>
精度 100S	1�?/span>	30�?/span>	1�?/span>	10ppb	0.03�?/span>	0.03�?/span>
测量范围	3�?/span>	30�?/span>	1�?/span>	25ppb	0.1�?/span>	0.1�?/span>
响应时间	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>

含氮气体同位素：

参数	NH₃	��¹⁵N¹⁴N¹⁶O�?#948;¹⁵N��（�/span>	��¹⁴N¹⁵N¹⁶O�?#948;¹⁵N��（�/span>	��¹⁴N¹⁴N¹⁸O�?#948;¹⁸O（�/span>
精度 1S	40ppt	0.1�?/span>	0.03�?/span>	8�?/span>
精度 100S	10ppt	1�?/span>	1�?/span>	2�?/span>
测量范围	0-10000ppb	300~30000ppb	300~30000	300~30000
响应时间	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>	1-10HZ可逈�/span>

四、应用案刖�/span>

1、意大利化�/span>部土壤农�?/span>�?/span>施加控制试验＋�/span>通过CPEC方法探究氨态氮＇�/span>NH₄⁺-N\NH₃）内部转化过程及氨气＇�/span>NH₃）恢复�?/span>�?/span>夰�/span>^{』�/span>1【�/span>}、�/span>

兰德里亚诹�/span>Landriano 2009（SI-09）和2011（SI-11）试验期间，通过涡流协方差系统（EC）和反向拉格朗日随机模型（bLS（�/span>估算NH₃累积排放和归一匕�/span>损失

结果表明：氮施加实验名�/span>24�?0 h。的**NH₃排放水平丹�/span>138.3 mg/m-²s-¹咋�/span>243.5mg/m-²s-¹＋�/span>NH₄-N的总损夰�/span>比例在两次扩散实验后7天分�?/span>丹�/span>19.4�咋�/span>28.5＄�/span>、�/span>

2�?/span>中国亚热带典型的蔬菜�?/span>利用CPEC方法同时测量一氧化二氮（N₂O），甲烷（CH₄）和二氧化碳（CO₂）通量^{�?【�/span>}、�/span>

N₂O，CH₄咋�/span>CO₂（实心圆）和气温（空心圆）的频率加权归一化共谱）以及相应的高频共谱传递函�?/span>

结果�?/span>昍�/span>９�/span>通过Aerodyne友�/span>激先�/span>分析�?/span>的检测结果计算出N₂O的中值精度（1��）为0.14 nmol/mol^-1＋�/span>�?/span>野外条件下，采样频率�?0 Hz时，CH₄的摩尔浓度为3.3 nmol/mol，CO₂的摩尔浓度为0.36��mol/mol、�/span>

3、美国马萨诸塞州温带森林中生态系�?大气二氧化碳净交换（NEE（�/span>的同位素组份（即¹²C¹⁶O₂�?/span>¹³C¹⁶O₂咋�/span>¹⁸O¹²C¹⁶O的净交换量）CPEC方法测量^{�?【�/span>}、�/span>

通过EC(实线)咋�/span>EC/Flask(虚线)估算皃�/span>6月（橙色�?月（绿色）�?月（蓝色）和9月（紫色）的��¹³C日变化、�/span>EC循环已平滑至2 h，并且仅展示亅�/span>CO₂通量小于-2 mol m^-2s^-1的时间、�/span>

NEE�?/span>��¹⁸O6月（橙色�?月（绿色）�?月（蓝色）和9月（紫色）的��¹³C日变化，EC结果已平滑至2 h

结果表明９�/span>NEE�?/span>皃�/span>¹³C组份表现凹�/span>日变化的趋势，可能反映了光合作用的扩散和生化限制之间的平衡转移。白天，¹⁸O同位紟�/span>通量表现出与蒸发皃�/span>¹⁸O叶片水富雅�/span>有关的特征、�/span>同位紟�/span>通量咋�/span>NEE中的¹³C组份都有明显的季节性变匕�/span>＋�/span>NEE�?/span>皃�/span>¹⁸O练�/span>仼�/span>逐月更一致、�/span>

4、瑞士中部集约化经营草地采用量子级联激光吸收光谱法＇�/span>QCLAS（�/span>寸�/span>N₂O**同位素表征、�/span>

标气（红色）和表层（黑色（�/span>N₂O摩尔分数（顶部）和同位素值（三个底部面板）在原为实验期间皃�/span>大气表层测量

结果表明：同步涡度协方差N₂O通量测量确定了土壤中N₂O的通量平均同位素特征，集约经营草地N₂O的通量平均同位素组成SP�?#948;¹⁵N^buk咋�/span>��¹⁸O分别�?.9��4.3�?17.4��6.2�?7.4��3.6‰、�/span>

5、美国哈佛森林温带落叶林通过羰基硫的吸收确立了林冠层气孔导度，蒸腾和蒸发的动态变化、�/span>

冠层OCS吸收咋�/span>初级生产总值（GPP）随着叶相关吸收（LRU（�/span>咋�/span>光和有效辐射＇�/span>PAR（�/span>皃�/span>绻�/span>

冠层OCS吸收咋�/span>初级生产总值（GPP）随着叶相关吸收（LRU（�/span>咋�/span>光和有效辐射＇�/span>PAR（�/span>

结果表明９�/span>在这个温带的落叶森林林地中，基于土壤中OSC含量预测土壤始终是羰基硫的汇。OCS通量测量可以作为探测其他生态系统中的气孔导度的通用工具，并且可在叶片尺度和实验室研究中用作探测气孔导度的通用工具、�/span>

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』�/span>8【�/span>Cross road and mobile tunable infrared laser measurements of nitrous oxide emissions from motor vehicles� J.L. Jimenez� J.B. McManus� J.H. Shorter� D.D. Nelson� M.S. Zahniser� M. Koplow� G.J. McRae� and C.E. Kolb� Chemosphere - Global Change Science�2� 397-412 (1999).

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