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エルニーニョがプレアデス星座の視界に及ぼす影響によるアンデス山脈の降雨と作物の収穫を予測する
1Department of Environmental Science and Policy, University of California, Davis 95616, USA. bsorlove@ucdavis.edu
Nature
|January 19, 2000
まとめ
古代アンデス地方の農民は,プレアデス星団の観測によって降雨を予測した. 視界の悪さはエルニーニョの年を示し,干ばつを予測し,ジャガイモの作物の農業調整を導く.
科学分野:
- 農業科学 農業科学とは
- 気候科学 気候科学
- 天文学 天文学
背景:
- 南米のアンデス山脈の農家は,雨を予測するために,歴史的にプレアデス星の可視性を利用しました.
- この伝統的な方法は,干ばつによる影響を軽減するために,農業慣行,特にジャガイモの植え付けにインパクトを与えた.
研究 の 目的:
- プレアデス星座に基づく伝統的な降雨予測方法の科学的根拠を分析する.
- プレアデス星座の可視性,雲の覆い,エルニーニョ-南方振動 (ENSO) の出来事との相関を調査する.
主な方法:
- 雲の覆いと水蒸気に関する衛星画像データを活用した.
- アンデス高原からの組み込み農学データ.
- 分析のためにエルニーニョの変動性のインデックスを採用しました.
主要な成果:
- 6月のプレアデス星座の弱視は,高いシラス雲によって引き起こされ,エルニーニョの年を正確に示す.
- エルニーニョの年は,通常,成長期の降雨量の減少と関連しています.
- 観測された現象は,天体観測と気候変動の変動を結びつけています.
結論:
- 何世紀にもわたる古い予測方法は,エルニーニョの変動の指標として科学的に検証されています.
- この伝統的な生態学的知識は,アンデス山脈の季節性降雨の予測に貴重なツールを提供します.
- このリンクを理解することは,農業の気候変動適応戦略に役立つ.
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