最後の氷河期における地域と世界の海面温度

Jeremy S Hoffman¹, Peter U Clark², Andrew C Parnell³

¹College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA. jhoffman@smv.org.

Science (New York, N.Y.)

|January 21, 2017

まとめ

過去の氷河期 (LIG) では世界の海面が今日より高かった. LIGの海面温度は19世紀後半より0.5°C高かった.

科学分野:

古代気候学
海洋学
気候科学

背景:

過去の氷河期 (LIG) の海面は現在の海面よりも高かった.
過去のLIGの地球温度の再構築は,推定値が大きく異なる大きな不確実性を示しています.
過去の気候動態と将来の予測を理解するために,正確なLIG温度データは不可欠です.

研究の目的:

LIG中の地域と世界の海面温度 (SST) の時空変動を再構築する.
LIGの世界気温の推定における不確実性を解消する.
LIGの地域的なSSTの変化の原動力を調査する.

主な方法:

海面温度 (SST) レコードのネットワークを利用した.
LIG時代 (12万9千年前から11万6千年前) の地域と世界のSSTを再構築した.
熱帯圏外SSTに対する北極の太陽照射と二極の揺り輪の影響を分析した.

主要な成果:

LIGのピークの年間平均SSTは1870年から1889年の平均より0.5±0.3°C高かった.
LIGの世界的なSSTは1995年から2014年の平均と区別できませんでした.
熱帯域外のLIG温暖化は,北極の太陽照射と二極の揺れによって引き起こされた.
熱帯のLIG SSTは,日照が減少したため,1870年から1889年の平均より少し涼しかった.

結論:

LIGの世界的な気温は,工業化以前の時期よりわずかに暖かいだけでした.
LIGにおける地域的なSSTの変動は,異なる気候メカニズムによって影響を受けた.
この研究はLIGの気候とその要因の理解を洗練しています

さらに関連する動画

10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

6.4K

07:16

Thermal Limits Determination for Zooplankton Using a Heat Block

Published on: November 18, 2022

1.8K

関連する概念動画

01:50

Global Climate Change

29.3K

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.

29.3K

01:16

What is Climate?

21.2K

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.

21.2K

01:21

Isothermal Processes

5.2K

A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...

5.2K

01:19

Assessing Body Temperature - Temporal Artery

1.4K

Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's...

Speciation Rates

Radiation: Applications

1.9K

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...