CHARACTERIZATION OF TEMPERATURE AND PRECIPITATION FIELDS OVER SARDINIA WITH PRINCIPAL COMPONENT ANALYSIS AND SINGULAR SPECTRUM ANALYSIS
CHARACTERIZATION OF TEMPERATURE AND PRECIPITATION FIELDS OVER SARDINIA WITH PRINCIPAL COMPONENT ANALYSIS AND SINGULAR SPECTRUM ANALYSIS
复制标题
利用主成分分析和奇异谱分析表征撒丁岛上的温度和降水场
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Marrocu
中科院分区：
文献类型：
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作者：
R. Benzi;R. Deidda;M. Marrocu
在撒丁岛地区的温度和降水场的气候分析。这项工作的主要目的是表征温度和降水场，以更好地了解撒丁岛的气候。主成分分析（PCA）和奇异谱分析（SSA）已被应用到最高和最低温度和累积日降水量数据收集在撒丁岛地区在1951 - 1992年期间。结果表明，最显着的时间和空间的温度场的部分所描述的PCA的第一主成分，SSA这样的第一主成分揭示了38天的振荡在该地区，相关的行星波观测到的振荡在北方半球。主成分分析的前三个主成分较好地代表了降水场。这些主成分的聚类分析表明，多峰性的降水分布和存在的条件下，一个高的总降水量定位在东撒丁岛。#1997年由皇家气象学会。国际气候学杂志，17：1231 - 1262（1997）。
A climatic analysis of temperature and precipitation fields in the Sardinia region is developed. The main purpose of this work is the characterization of temperature and precipitation fields to better understand Sardinia’s climate. Principal component analysis (PCA) and singular spectrum analysis (SSA) have been applied to maximum and minimum temperature and to cumulative daily precipitation data collected in the Sardinia region during the period 1951‐1992. It is shown that the most significant temporal and spatial portion of temperature fields are described by the first principal component of PCA; SSA of such a first principal component reveals a 38 day oscillation in the region, related to the oscillations observed for planetary waves in the Northern Hemisphere. Precipitation fields are well represented by the first three principal components of PCA. The cluster analysis of those principal components shows the plurimodality of precipitation distribution and the existence of conditions of a high total precipitation localized in Eastern Sardinia. # 1997 by the Royal Meteorological Society. Int. J. Climatol., 17: 1231‐1262 (1997).