ターミネーションI中の西風の位置によって調節された東アジアの水候

Hongbin Zhang^1,2, Michael L Griffiths³, John C H Chiang⁴

¹State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China.

Science (New York, N.Y.)

|November 3, 2018

まとめ

紀元前東アジアのモンスーンの記録は北大西洋の寒冷期の中央中国がより湿ったことを示していますこれは雨季の延長によって説明され,洞窟のデータにおける明らかな矛盾を解決します.

科学分野:

古代気候学
気候の動態
四次科学

背景:

スペレオテムの酸素同位体は過去の東アジアのモンスーンの動態を理解するための鍵です.
既存の解釈は,同位体信号と水気気候の変化を調和させる上で課題に直面しています.

研究の目的:

マルチプロキス・スペレオテム記録を用いて,最後の脱氷期における東アジアのモンスーンの進化を調査する.
酸素同位体データと水気気候の解釈の不一致を解決する.

主な方法:

中央の長江川の複数の洞窟の記録の分析
モンスーンの季節性という文脈における同位体および他の代理物の解釈.
仮説を検証するための気候モデルシミュレーション

主要な成果:

北大西洋の冷却イベントの間,より湿った中央東中国が観察されました.
酸素同位体のデータは弱まったモンスーンを示し明らかに矛盾している.
この矛盾は,梅雨の期間と梅雨後のステージの長さの変化として解釈することで解決された.

結論:

スペレオテムの記録は季節の変動を反映しています季節の変動の強度だけでなく
東アジアの気候は北大西洋の気候の変動に敏感である.
西風は北大西洋の気候信号を東アジアに伝達する上で重要な役割を果たします

さらに関連する動画

05:38

Terminal H-reflex Measurements in Mice

Published on: June 16, 2022

6.4K

08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.4K

関連する概念動画

01:44

Termination of Translation

27.7K

The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...

27.7K

01:44

Termination of Translation

6.8K

02:32

Position-effect Variegation

7.1K

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

7.1K

01:31

Position and Displacement

25.9K

The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...

25.9K

01:03

Serial Position Effect

542

The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...

542

01:18

Drag Force and Terminal Speed

3.4K

An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...