维基百科

File:Sauerstoffgehalt-1000mj2.png

原始文件 （2,000 × 1,409像素，文件大小：74 KB，MIME类型：image/png）

描述
English: This graph represents the concentration of oxygen in the atmosphere over the last 1000 million years. As a reference, the dashed red line shows the present concentration of 21%.

It should be noted that the O2 concentration variation which occurred in past periods can often be estimated only relatively coarsely. Therefore, the chart makes no claim to accuracy, but can only give a broad overview of change at the level of geological periods. This chart is based on the averaged data of several publications. [1][2]

Explanation of the curve:

After having already begun in the Precambrian, the outgassing of oxygen from the oceans caused atmospheric oxygen to jump from 3% to 12% around the beginning of the Cambrian, because by then all oxygen sinks were finally saturated. Around the same time, the Cambrian explosion took place. During the Silurian and Devonian plants spread over the land, while the animal kingdom was still almost exclusively confined to the water. This caused a further rapid and continuous increase of the oxygen concentration. In the following period carbon burial brought the oxygen level to 35%,[3] thus favoring overgrowth especially in insects. Amphibians and early reptiles were now present on land.

Massive volcanic activity at the Permian-Triassic transition caused not only a decline of the oxygen content to 15%, but also the largest mass extinction in geological history. The oxygen concentration then recovered over a long period and reached 26% again by the middle of the Jurassic, and probably even rose to 30% in the Cretaceous. During this time the largest dinosaurs evolved.

The end of the Cretaceous period is marked by an impact event, with climate change and a mass extinction. The oxygen level was only 23% 40 million years ago, and had reached the present value of 21% by 25 million years ago. Since then the level has remained constant, apart from fluctuations in the per thousand range.
  1. ↑ Gunnar Ries: Dicke Luft bei den Sauriern
  2. ↑ Geologiefznzzrz-Forum @ Geoversum: Massensterben an der Perm-Trias Grenze: Durch Sauerstoffmangel erstickt?
  3. ↑ wissenschaft.de: Gigantismus, Fliegen und Antiaging: Sauerstoffreiche Luft löste vor 300 Millionen Jahren einen Innovationsschub aus
Русский: Концентрация кислорода в атмосфере Земли в течение последнего миллиарда лет
日期 (UTC)
来源
作者
其他版本
  • 英语 .svg
    英语 .svg
  • 俄语 .svg
    俄语 .svg
  • 英语 .png
    英语 .png
  • 德语 .svg
    德语 .svg
Derivative works of this file:  OxygenLevel-1000ma.svg
File:OxygenLevel-1000ma.svg是此文件的矢量版本。 如果此文件质量不低于原点阵图，就应该将这个PNG格式文件替换为此文件。
File:Sauerstoffgehalt-1000mj2.png → File:OxygenLevel-1000ma.svg
更多信息请参阅Help:SVG/zh。
其他语言
Alemannisch ∙ Bahasa Indonesia ∙ Bahasa Melayu ∙ British English ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ eesti ∙ English ∙ español ∙ Esperanto ∙ euskara ∙ français ∙ Frysk ∙ galego ∙ hrvatski ∙ Ido ∙ italiano ∙ lietuvių ∙ magyar ∙ Nederlands ∙ norsk bokmål ∙ norsk nynorsk ∙ occitan ∙ Plattdüütsch ∙ polski ∙ português ∙ português do Brasil ∙ română ∙ Scots ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ suomi ∙ svenska ∙ Tiếng Việt ∙ Türkçe ∙ vèneto ∙ Ελληνικά ∙ беларуская (тарашкевіца) ∙ български ∙ македонски ∙ нохчийн ∙ русский ∙ српски / srpski ∙ татарча/tatarça ∙ українська ∙ ქართული ∙ հայերեն ∙ বাংলা ∙ தமிழ் ∙ മലയാളം ∙ ไทย ∙ 한국어 ∙ 日本語 ∙ 简体中文 ∙ 繁體中文 ∙ עברית ∙ العربية ∙ فارسی ∙ +/−
新SVG图片


 这是一张修改过的图片，这意味着它已在原版本的基础上通过软件进行了编辑，改动内容：Translated text to English。其原始版本为：Sauerstoffgehalt-1000mj.svg。修改者：WolfmanSF。

我，本作品著作权人，特此采用以下许可协议发表本作品：
Public domain 我，本作品著作权人，释出本作品至公有领域。这适用于全世界。
在一些国家这可能不合法；如果是这样的话，那么：
我无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

原始上传日志

This image is a derivative work of the following images:

  • File:Sauerstoffgehalt-1000mj.svg licensed with PD-self
    • 2007-10-27T01:17:42Z LordToran 744x524 (41527 Bytes) '
    • 2007-07-23T00:08:15Z LordToran 744x524 (42518 Bytes) == Beschreibung == {{Information |Description=Dieses Diagramm stellt die Sauerstoffkonzentration in der Erdatmosphäre im Lauf der letzten Jahrmilliarde dar. Es ist anzumerken, dass die Zeiträume, in denen vergangene Schwan
    • 2007-07-17T23:57:50Z LordToran 744x524 (41203 Bytes) {{Information |Description=Dieses Diagramm stellt die Sauerstoffkonzentration in der Erdatmosphäre im Lauf der letzten Jahrmilliarde dar. |Source=Selbst erstellt |Date=2007-07-18 |Author=[http://de.wikipedia.org/wiki/Benutze

Uploaded with derivativeFX

说明

添加一行文字以描述该文件所表现的内容

此文件中描述的项目

描绘内容

版权状态 简体中文（已转写）

受版权保护，并由版权所有者释出于公有领域 简体中文（已转写）

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2010年3月11日 (四) 10:312010年3月11日 (四) 10:31版本的缩略图2,000 × 1,409（74 KB）WolfmanSF{{Information |Description=Dieses Diagramm stellt die Sauerstoffkonzentration in der Erdatmosphäre im Lauf der letzten Jahrmilliarde dar. Als Referenz zeigt die gestrichelte rote Linie die heutige Konzentration von 21% an. Es ist anzumerken, dass die Ze

以下页面使用本文件：

全域文件用途

以下其他wiki使用此文件：

检索自“https://zh.wikipedia.org/wiki/File:Sauerstoffgehalt-1000mj2.png”