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関連する概念動画

Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Deep Sea Microbial Ecology01:18

Deep Sea Microbial Ecology

The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
Green Algae01:21

Green Algae

Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Freshwater Microbial Ecology01:24

Freshwater Microbial Ecology

Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
Marine Microbial Ecology01:30

Marine Microbial Ecology

Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...

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関連する実験動画

Updated: Jul 12, 2026

Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
09:06

Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside

Published on: July 3, 2016

グリーンランドの新しい深い氷の核が形成されました.

W Dansgaard, H B Clausen, N Gundestrup

    Science (New York, N.Y.)
    |December 24, 1982
    PubMed
    まとめ

    グリーンランドの新しい氷芯は9万年の気候記録を提供している. この古気候データは,過去の大気条件と氷河期間の重要な詳細を明らかにします.

    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
    • 氷河学 氷河学とは
    • 気候科学 気候科学

    背景:

    • 北極の氷床は,過去の大気組成と気候の重要なアーカイブです.
    • 長期的な気候変動の変動を理解することは,将来の気候変動を予測するために不可欠です.

    研究 の 目的:

    • グリーンランド南部の新しい深い氷の核を分析し,古気候条件を再構築するために.
    • 約9万年前まで遡る連続した気候記録を確立するために.

    主な方法:

    • グリーンランドの南部で氷の深い核を掘削している.
    • 氷の核の酸素同位体プロフィールを分析する.
    • 氷芯の記録を既存の古気候データ (キャンプ・センチュリー氷芯,深海のフォラミニフェラ) と比較する.

    主要な成果:

    • 新しい氷芯は,現在より約9万年前まで遡る,連続した古気候記録を提供します.
    • 詳細な気候シグナル,特にウィスコンシン時代のシグナルは,氷の核に明らかです.
    • 一般的な傾向は,確立された海洋同位体段階 (エミリアニ段階) と一致しています.

    さらに関連する動画

    Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
    13:38

    Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats

    Published on: October 26, 2019

    Using Generative Art to Convey Past and Future Climate Transitions
    06:10

    Using Generative Art to Convey Past and Future Climate Transitions

    Published on: March 31, 2023

    関連する実験動画

    Last Updated: Jul 12, 2026

    Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
    09:06

    Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside

    Published on: July 3, 2016

    Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
    13:38

    Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats

    Published on: October 26, 2019

    Using Generative Art to Convey Past and Future Climate Transitions
    06:10

    Using Generative Art to Convey Past and Future Climate Transitions

    Published on: March 31, 2023

  • キャンプ・センチュリー記録の再評価は,エム/サンガモン氷期間の急激な終わりを示しています.

    • 結論:

    • グリーンランドの南部の氷芯は,古気候の再構築のための貴重な資源です.
    • この発見は,過去の氷河期と氷河期間の動態についての洞察を提供します.
    • データは,急激な気候変動イベントのより正確な理解をサポートしています.