まとめ
太陽の紫外線照射の変動は,熱帯オゾン層の変化と相関しています. これらの発見は,太陽の11年間のサイクルで上層平流層におけるオゾンの大幅なシフトを示唆し,さらなる紫外線放射線測定を必要とする.
科学分野:
- 大気科学 大気科学
- ソーラー物理学 ソーラー物理学
- オゾン層の研究 オゾン層の研究
背景:
- 太陽の紫外線 (UV) 照射は周期的な変動を示しています.
- ストラトスフィアのオゾン濃度は,太陽の活動によって影響を受けます.
- 以前のモデルでは,太陽のサイクルとオゾン層との関連が示唆されていた.
研究 の 目的:
- 太陽の紫外線照射の変動と熱帯オゾン濃度との関係を調査する.
- 太陽力へのオゾン反応の振幅を定量化するために.
- より長い太陽周期で上層層層のオゾン変化の可能性を推測する.
主な方法:
- 1979年の冬からの太陽紫外線照射データ分析.
- 同じ期間の熱帯におけるゾーン平均オゾン値の測定.
- 観測されたオゾン変動を理論的な計算と比較.
主要な成果:
- 太陽の紫外線照射で13.5日周期と1%の振幅の変動が観察されました.
- 熱帯オゾン値は,0.25%から0.60%の相応の変動を示しました.
- 観測されたオゾン反応は,以前の計算と一致していますが,少し過大評価されている可能性があります.
結論:
- 太陽の紫外線照射の変動は,熱帯オゾン層に直接影響を及ぼします.
- 標高48kmのオゾン層は,太陽の11年周期で最大12%の変化を経験する可能性があります.
- 上層平流層のオゾン層の変化を正確に解釈するには,200 nm近くの太陽紫外線を測定する必要があります.
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