まとめ
海洋の浸出量は,年間0.2~6百万トンで,世界規模では年間0.6百万トンと推定されている. 地質学的基準は,直接的な測定が限られているところでの浸透の可能性を評価するために極めて重要です.
科学分野:
- 地質化学 地質化学
- 海洋地質学 海洋地質学
- 環境科学 環境科学
背景:
- 海底からの物質の放出である海洋の浸透は,重要な地質学的プロセスです.
- 直接測定が限られているため,世界の海洋浸出量の正確な定量化は困難です.
- 浸水率は,異なる海洋環境によって著しく異なります.
研究 の 目的:
- 海洋浸出の世界的な範囲と現在の大きさを推定する.
- 地質学的基準と漏れの可能性との関係を特定する.
- さまざまな浸透の可能性のある地域が世界全体に与える貢献度を評価する.
主な方法:
- 地質学的基準を用いて,海洋環境における浸透の可能性を評価した.
- カリフォルニア州南部のような流出傾向のある地域に基づいた流出率の推計.
- 潜力 (高,中等,低) により,異なる海洋盆地における浸水貢献の分布を分析した.
主要な成果:
- 推定の世界的な海洋の浸出量は,年間0.2~6百万トンの範囲で,年間0.6百万トンの最良の推定値です.
- 浸出可能性が高い地域は,世界の浸出量の約45%を占め,中程度の浸出可能性のある地域は55%を占める.
- 環太平洋地域は,世界全体の海洋浸出量の約40%を占め,太平洋における主要な寄与者は,潜在可能性の高い地域である.
結論:
- 地質学的評価は,直接的な測定が不十分である海洋の浸透を推定するための健全な基礎を提供します.
- 浸透の寄与には地域的な差異があり,太平洋を中心に高潜力地域があり,他の海洋では中等潜力地域が顕著である.
- 浸水分布を理解することは,海洋環境評価と資源管理に不可欠です.
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