VEMAP 2: U.S. MONTHLY CLIMATE, 1895-1993, VERSION 2

The Vegetation/Ecosystem Modeling and Analysis Project (VEMAP) Phase 2 has developed a data set of ~100-year gridded monthly and daily time series of climate for the conterminous United States that includes realistic interannual variability. This data set has been used to compare time-dependent ecological responses of biogeochemical and coupled biogeochemical-biogeographical models to historical time series and projected scenarios of climate, atmospheric CO2, and N-deposition. Development of the data set is reported in Kittel et al. (1997). As in the VEMAP 1 database, the historical data set has (1) daily and monthly versions; (2) physical consistency among variables on a daily basis; (3) consistency between climate and topography; and (4) needed input variables for VEMAP2 models (minimum and maximum temperature, precipitation, vapor pressure, and solar radiation) (Kittel et al. 1995). This historical monthly climate data set was designed to be concatenated with the /VEMAP/vemap.html">VEMAP 2: U.S. Monthly Climate Change Scenarios, Version 2 data set to create a single climate series from 1895 - ~2100. Users are requested to confer with the NCAR VEMAP Data Group to ensure that the intended application of the data set is consistent with the generation and limitations of the data. Data Citation The data set should be cited as follows: Kittel, T. G. F., N. A. Rosenbloom, C. Kaufman, J. A. Royle, C. Daly, H. H. Fisher, W. P. Gibson, S. Aulenbach, D. N. Yates, R. McKeown, D. S. Schimel, and VEMAP 2 Participants. 2000. VEMAP 2: U. S. Monthly Climate, 1895-1993, Version 2. Available on-line from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

植被/生态系统建模与分析项目（Vegetation/Ecosystem Modeling and Analysis Project, VEMAP）第二阶段，针对美国本土构建了一套时长约100年的网格化逐月、逐日气候时间序列数据集，该数据集包含真实的年际变率。本数据集已被用于对比生物地球化学模型以及生物地球化学-生物地理学耦合模型，在历史气候时间序列、大气CO₂浓度及氮沉降情景下的时变生态响应特征。该数据集的开发工作详见Kittel等人1997年的研究。与VEMAP 1数据库一致，本历史数据集具备以下特性：（1）同时包含逐日与逐月版本；（2）各变量间具备逐日尺度的物理一致性；（3）气候数据与地形数据相匹配；（4）可直接作为VEMAP2模型的所需输入变量，包括最低与最高气温、降水量、水汽压以及太阳辐射（Kittel等，1995）。本历史逐月气候数据集旨在与链接地址为/VEMAP/vemap.html的"VEMAP 2：美国逐月气候变化情景，版本2"数据集进行拼接，以生成1895年至约2100年的完整气候序列。请用户与美国国家大气研究中心（National Center for Atmospheric Research, NCAR）VEMAP数据工作组接洽，以确认数据集的预期应用与其生成逻辑及局限性相符。数据引用规范如下：Kittel, T. G. F., N. A. Rosenbloom, C. Kaufman, J. A. Royle, C. Daly, H. H. Fisher, W. P. Gibson, S. Aulenbach, D. N. Yates, R. McKeown, D. S. Schimel, 及VEMAP 2项目参与者. 2000. VEMAP 2：美国逐月气候数据集（1895-1993），版本2. 可从美国田纳西州橡树岭国家实验室分布式主动存档中心在线获取。