Global CO2 transport simulations using meteorological data from the NASA data assimilation system -: art. no. D18312
Global CO2 transport simulations using meteorological data from the NASA data assimilation system -: art. no. D18312
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DOI：
10.1029/2004jd004554
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发表时间：
2004-09-29
影响因子：
4.4
通讯作者：
Zhu, Z
中科院分区：
文献类型：
--
作者：
Kawa, SR;Erickson, DJ;Zhu, Z
[ 1]我们使用NASA有限体积数据同化系统（FVDAS）的气象数据对大气CO2传输进行了首次分析。分析的气象场被用于沿着与气候地面源和汇在离线，向前传输模拟1998 - 2000年。模型诊断分析和以前的结果比较表明，模型的性能是一致的，与大多数以前的全球运输模式。沿沿着与CO2季节性循环的时间和幅度的模型半球间梯度进行了讨论，提供关于北方生物圈，热带土地，南大洋通量的推论。给出了全球柱积分CO2的分布，为大气CO2柱星载仪器设计的测量要求提供依据。在天气尺度上，我们发现使用FVDAS分析的风与数据进行比较有显着的好处。在近赤道观测站点，该模式正确地模拟了与ITCZ纬向运动相关的大气成分转换。与来自连续分析器站点的每日数据的比较表明，该模型捕获了由于运输变化而观察到的大量天气变化。这些结果表明，有可能使用高的时间和空间分辨率的遥感数据，以限制CO2的表面通量，他们形成的起点，发展业务CO2同化系统，以产生高分辨率的大气CO2分布和全球碳预算的定量估计。
[ 1] We present a first analysis of atmospheric CO2 transport using meteorological data from the NASA finite volume data assimilation system (FVDAS). The analyzed meteorological fields are used along with climatological surface sources and sinks in an off-line, forward transport simulation for 1998 - 2000. Analysis of model diagnostics and comparisons to previous results indicates that the model performance is consistent with that of most previous global transport models. The model interhemispheric gradients along with the timing and magnitude of the CO2 seasonal cycle are discussed, providing inferences regarding the northern biosphere, tropical land, and southern ocean fluxes. Global distributions of column-integrated CO2 are presented to provide a basis for measurement requirements for the design of satellite-based instruments for atmospheric CO2 column. On the synoptic scale we find a significant benefit in using the FVDAS analyzed winds for comparisons to data. At near-equatorial observation sites, the model correctly simulates the observed atmospheric composition transition associated with the latitudinal movement of the ITCZ. Comparison to daily data from continuous analyzer sites shows the model captures a substantial amount of the observed synoptic variability due to transport changes. These results show the potential to use high temporal and spatial resolution remote sensing data to constrain CO2 surface fluxes, and they form the starting point for developing an operational CO2 assimilation system to produce high-resolution distributions of atmospheric CO2 and quantitative estimates of the global carbon budget.