ISLSCP II Reanalysis Near-Surface Meteorology Data

This data set for the ISLSCP Initiative II data collection provides near surface meteorological variables, fluxes of heat, moisture and momentum at the surface, and land surface state variables, all with a spatial resolution of 1 degree in both latitude and longitude. There are four temporal categories of data: time invariant and monthly mean annual cycle fields (together referred to as "fixed" fields), monthly mean fields, monthly 3-hourly diurnal, and 3-hourly fields. Two types of variables exist in this data; instantaneous fields (primarily state variables), and average fields (primarily flux fields expressed as a rate).

The Center for Ocean-Land Atmosphere Studies (COLA) near-surface data set for ISLSCP II was derived from the National Centers for Environmental Prediction (NCEP)/Department of Energy (DOE) Atmospheric Model Inter-comparison Project (AMIP-II) reanalysis (http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/), covering the years from 1979-2003. The data set for ISLSCP II covers the period from 1986 to 1995. The purpose of the reanalysis was to provide an improved version of the original NCEP/National Center for Atmospheric Research (NCAR) reanalysis for General Circulation Model (GCM) validation. To co-register the NCEP/DOE reanalysis on the ISLSCP 1-degree grid, the reanalysis data set was regridded from its native T62 Gaussian grid) resolution (192 x 94 grid boxes globally) to 1-degree ISLSCP II required resolution.

There are 136 compressed (.tar.gz) data files with this data set. When extrapolated, the individual data files are in ASCII (.asc) format.

本数据集为ISLSCP Initiative II数据收集项目提供近地表气象变量、地表热量、水分和动量通量，以及地表状态变量，所有数据均以1度经纬度空间分辨率呈现。数据分为四个时间类别：时间不变的月平均年循环场（统称为“固定场”）、月平均场、月3小时日变化场和3小时场。本数据集中存在两种类型的变量；瞬时场（主要为状态变量）和平均场（主要为以速率表达的通量场）。近海-陆地大气研究中心（Center for Ocean-Land Atmosphere Studies, COLA）为ISLSCP II提供的近地表数据集源于美国国家环境预测中心（National Centers for Environmental Prediction, NCEP）/能源部（Department of Energy, DOE）大气模型互评项目（Atmospheric Model Inter-comparison Project, AMIP-II）再分析（http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/），涵盖1979-2003年间的数据。ISLSCP II数据集覆盖1986至1995年间的时期。再分析的目的在于提供NCEP/国家大气研究中心（National Center for Atmospheric Research, NCAR）原始再分析的一个改进版本，以供通用环流模型（General Circulation Model, GCM）验证使用。为将NCEP/DOE再分析数据集与ISLSCP 1度网格对齐，该再分析数据集从其原生T62高斯网格（全球192 x 94个网格格箱）分辨率进行了重网格化至1度ISLSCP II所需的分辨率。本数据集包含136个压缩的.tar.gz数据文件。当扩展后，单个数据文件均为ASCII格式(.asc)。