ホロセンの後半期の気候と,アメリカ南西部の文化的変化
1Department of Earth and Planetary Sciences, University of New Mexico, 200 Yale Boulevard, Albuquerque, NM 87131, USA. polyak@unm.edu
まとめ
グアダルーペ山脈のスタラグミットから得られた4000年の気候記録は,米国南西部の湿気と乾燥の時期を明らかにしています. これらの気候変動は,先住民族の文化活動や定住パターンの変化と相関しています.
科学分野:
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 四次地質学 四次地質学
- アメリカ南西部の気候史
背景:
- 柱状のスタラグミットは,過去の気候条件の毎年解決されたアーカイブを提供します.
- 米国南西部のホロセンの後半の気候は完全に理解されていません.
- 過去の気候の変動を理解することは,生態学的および文化的変化の解釈に不可欠です.
研究 の 目的:
- アメリカ南西部の年間4000年の気候の歴史を再構築する.
- 古代気候データと先住民の考古学的記録を相関させる.
- 気候変動が人間の居住地や文化活動に及ぼす影響を調査する.
主な方法:
- グアダルーペ山脈の柱状スタラグミットの分析.
- 年代順の解像度のために,年間帯と休止時間を利用します.
- 高精度のウラン・シリーズ・デッティングにより,正確な年齢制限が求められます.
主要な成果:
- 4000年から3000年前には,より乾燥した中期ホロセンの後に,今日のような気候が存在しました.
- 涼しく湿った時期は3000年から800年前まで続いた.
- 現在のような状態が再開し,現在の440年から290年前の短い湿った間隔があった.
結論:
- スタラガミットによる気候再構築は,米国南西部の気候変動の詳細な歴史を提供します.
- 再構築された気候の歴史は,先住民族の文化活動の変化と強い相関関係を示しています.
- 気候変動は,住宅の放棄と地域における人口再分配に影響を与えた可能性が高い.
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