CEOP Model Output : 3D Gridded NCEP CDAS data

Ten operational Numerical Weather Prediction (NWP) and two data assimilation centers are currently contributing analysis/assimilation and forecast model products from global and regional NWP suites, including both operational and reanalysis systems to this component of CEOP. The contributing centers include:

BoM: Bureau of Meteorology
CPTEC: Centro de Previsao de Tempo e Estudos Climaticos
ECMWF: European Centre for Medium-Range Weather Forecasts
ECPC: Experimental Climate Prediction Center
EMC: EPSON Meteo Center (Centro EPSON Meteo)
GLDAS: Global Land Data Assimilation System
GMAO: NASA Global Modeling and Assimilation Office
JMA: Japan Meteorological Agency
MSC: Meteorological Service Canada
NCEP: National Centers for Environmental Prediction
NCMRWF: National Center for Medium Range Weather Forecasting
UKMO: UK Met Office
The Max-Planck Institute for Meteorology (MPIM) in coordination with the ICSU World Data Center for Climate (WDCC) in Hamburg, Germany was designated as the CEOP model output archive center. The WDCC is administered by the Model and Data Group (M&D) at MPIM and the German Climate Computing Center (DKRZ).

To assist with the organization of this activity during the Coordinated Enhanced Observing Period ('CEOP'), a Model Output Management Document was drafted as a guide for the participating centers to use in setting up their processes for meeting their commitments to 'CEOP'. The Guidance Document addressed the two issues of (1) the model output variables requested by 'CEOP' and (2) the two types of requested model output, namely global gridded (in GRIB format) and site-specific Model Output Location Time Series (MOLTS) at each of the 'CEOP' Reference Sites.

A new version of the Guidance Document will be compiled that clarifies what model output data will be generated by the NWP Centers and Groups contributing to the model output component of Coordinated Energy and Water Cycle Observations Project (CEOP) and how they will interface/transfer the data that will be handled and retained at the WDCC. The issues covered in the document will include: (1) global versus regional products; (2) desired assimilation output; Interval and length of free-running forecasts; (3) Operational versus reanalysis data; (4) the CEOP schedule/archive periods; (5) the number and locations of MOLTS sites; and (6) the homogenizing of the model output and metadata formats (i.e. standard parameters).

Results up to this point in the CEOP model output generation effort make it clear that the transfer aspect of the data handling effort has been progressing well. Data from all twelve Centers participating in CEOP have been received at the data archive center and has either been placed into the database at the Hamburg facility, or is in the process of being entered into the database. The current data holdings in the MPIM archive can be viewed http://www.mad.zmaw.de/fileadmin/extern/wdc/ceop/Data_timeline_L_12.pdf.

当前，十个运行中的数值天气预报（NWP）中心和两个数据同化中心正为CEOP组件贡献分析/同化以及预报模型产品，这些产品源自全球和区域NWP系统，包括运行和再分析系统。贡献中心包括：

澳大利亚气象局（BoM）、巴西气象研究所（CPTEC）、欧洲中期天气预报中心（ECMWF）、实验气候预测中心（ECPC）、EPSON气象中心（EMC）、全球陆地数据同化系统（GLDAS）、NASA全球建模与同化办公室（GMAO）、日本气象厅（JMA）、加拿大气象服务（MSC）、美国国家环境预报中心（NCEP）、国家中期天气预报中心（NCMRWF）、英国气象局（UKMO）。

德国汉堡的国际科学联盟世界数据中心气候（ICSU World Data Center for Climate，WDCC）与马克斯·普朗克气象研究所（Max-Planck Institute for Meteorology，MPIM）协同，被指定为CEOP模型输出档案中心。WDCC由MPIM的模型与数据组（M&D）和德国气候计算中心（DKRZ）管理。

为协助在协调增强观测期（Coordinated Enhanced Observing Period，'CEOP'）期间组织此次活动，起草了一份模型输出管理文件，作为参与中心搭建满足'CEOP'承诺流程的指南。指导文件针对了两个问题：（1）'CEOP'请求的模型输出变量；（2）请求的两种模型输出类型，即全球格网化（GRIB格式）和特定地点的模型输出位置时间序列（MOLTS）。

将编制一份新的指导文件，以阐明将生成哪些模型输出数据，以及NWP中心和组如何将处理并保留在WDCC的数据进行接口/传输。文件将涵盖的问题包括：（1）全球与区域产品；（2）期望的同化输出；（3）自由运行预报的间隔和长度；（4）运行与再分析数据；（5）CEOP的时间表/存档期；（6）模型输出和元数据格式的统一（即标准参数）。

截至当前，CEOP模型输出生成工作所取得的结果表明，数据处理方面的传输环节进展顺利。参与CEOP的十二个中心的数据已收到，并已存入汉堡设施的数据库，或正在进入数据库的过程之中。MPIM档案中的当前数据持有情况可查阅http://www.mad.zmaw.de/fileadmin/extern/wdc/ceop/Data_timeline_L_12.pdf。