まとめ
合計太陽光照射量の測定は,太陽光斑の発達に関連した減少とともに,変動性を明らかにします. これは,太陽光発電が活発な地域内のエネルギー貯蔵量が大きいことを示唆しています.
科学分野:
- 太陽物理 太陽物理学
- 天文学 天文学
- 宇宙科学 スペースサイエンス
背景:
- 総太陽照射量 (TSI) は,地球の気候の基本的なパラメータです.
- TSIの変動は,気候や宇宙天候に影響を与える可能性があります.
- 以前の測定では,精度や時間解像度の制限がありました.
研究 の 目的:
- ソーラー・マキシマム・ミッション (SMM) から TSIの高精度測定を提示する.
- 最初の153日間の観測期間中のSTIの変動性を分析する.
- TSIの変動と太陽活動との関係を調査する.
主な方法:
- SMM衛星のアクティブ・キャビティ・ラジオメーター・イラディアンス・モニター (ACRIM) を利用しました.
- 収集された高精度のSTIデータは,0.001%ほどの不確実性があります.
- 軌道から軌道への変動と,照射率の変動のスペクトル特性を分析した.
主要な成果:
- 153日間にわたってSTIの有意な変動が観察され,幅度は平均の+/- 0.05% (1368.31 W/m2) ほどであった.
- 帯域限定のノイズと一致する照射率の変動が特定され,高周波のカットオフは0.15日−1.1日近くである.
- 2つの主要な照射量減少 (最大0.2%,約1週間持続) が,日光斑群の発達と強く相関していることが判明しました.
結論:
- TSIは,短い時間スケールで顕著な変動を示しています.
- 太陽光で活発な地域,特に太陽光斑は,STIの変動において重要な役割を果たします.
- 観測された変動は,活発な地域における太陽コンベクションゾーン内において,かなりのエネルギー貯蔵があることを示唆している.
関連する概念動画
Variability: Analysis
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
The range is a simple measure of variability, indicating the difference between the highest and...
Radiation Pressure: Problem Solving
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to the...
According to Hooke's law, the vibrational frequency is directly proportional to the...
Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Random Error
Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...


