摘要
地球自转变化用日长来表征。摩擦力矩是由于地球和大气摩擦产生的轴向力矩,是组成大气角动量的重要部分。因此,构建摩擦力矩和日长的数据集对地气角动量传输及气候变化研究具有重要意义。在本数据集中,日长原始数据来自IERS(https://www.iers.org/),最高时间分辨率为1天。计算摩擦力矩所用的纬向动量通量数据来自NCEP/NCAR(The National Centers for Environmental Prediction and National Center for Atmospheric Research)第一套再分析数据(https://www.esrl.noaa.gov/psd/data/),利用前人总结的公式(Weickmann和Sardeshmukh,1994)计算出了1948-2015年较高时空分辨率(分辨率是1天,空间分辨率是192×94高斯格点)的全球摩擦力矩(本数据集中只提供全球积分结果)。本数据集包括:全球摩擦力矩与日长的日平均值、月平均值和年平均值。数据存储为.xlsx格式,由1个文件组成,文件大小为860 KB。该数据集的分析研究成果已经发表在《地球物理学进展》2016年第31卷第4期。
Changes in the earth’s rotational speed can be characterized by the length of day(LOD).Frictional torque is the axial moment of earth produced by atmospheric friction.The daily,monthly and yearly global frictional torque and length of day dataset(1948–2015)was developed based on LOD data and momentum flux data,which were integrated with the calculation method of Weickmann and Sardeshmukh(1994).The spatial resolution of the dataset was a T62 Gaussian grid with 192×94 pixels,and the data were averaged by day,month and year from 1948 to 2015.The dataset is archived in.xlsx format with a data size of 860 KB.An analysis paper based on the dataset was published in Progress in Geophysics in 2016(Vol.31,No.4).
作者
巩贺
黄玫
Gong,H.;Huang,M.(Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China)
出处
《全球变化数据学报（中英文）》
2018年第4期377-381,495-499,共10页
Journal of Global Change Data & Discovery
基金
中华人民共和国科学技术部(2012CB957802)
国家自然科学基金(41671101)
关键词
摩擦力矩
日长
全球
地球物理学进展
frictional torque
length of day
globe
Progress in Geophysics
