1726年から1997年までの南太平洋亜熱帯地域における海面気温の10年間の変動 A.D
B K Linsley1, G M Wellington, D P Schrag
1Department of Earth and Atmospheric Sciences, ES 351, University at Albany-State University of New York, Albany, NY 12222, USA.
まとめ
サンゴのSr/Ca記録は,太平洋海の表面温度 (SST) の変動が271年間続いたことを明らかにしています. ラロトンガ (Rarotonga) はラロトンガ (Rarotonga) と呼ばれています.
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
- 海洋学 海洋学 海洋学
- 気候科学 気候科学
背景:
- サンゴの骨格には,ストロンチウム (Sr) やカルシウム (Ca) のような元素が環境条件に敏感な比率で含まれています.
- 過去の海面温度 (SST) の変動を理解することは,気候モデリングと将来の変化の予測に不可欠です.
- 南太平洋の渦巻の気候の動態は,他の海域と比較して,あまり理解されていない.
研究 の 目的:
- 南太平洋における海面温度 (SST) 変動の長期 (271年) の記録を再構築する.
- ラロトンガ地域のSSTのプロキシとしてサンゴのSr/Ca比率の信頼性を評価する.
- 南太平洋における10年間のSST変動と北太平洋の気候パターンとの関係を調査する.
主な方法:
- ラロトンガからサンゴ核のサンプルを採取した.
- 既知の地化学技術を用いてサンゴのSr/Ca比を分析した.
- 1981年~1997年および1950年以降のSST記録 (衛星および船舶ベースの) に照合されたサンゴのSr/Caデータ.
- Pacific Decadal Oscillation (PDO) インデックスと10年間のSST変動を比較した.
主要な成果:
- サンゴのSr/Ca比率は,南太平洋の月間および十年間SSTの変動を正確に反映しています.
- 271年 (1726-2000年) の記録は,0.75°Cを超える10年間および10年間における重要なSST体制のシフトを示しています.
- ラロトンガの数十年にわたるいくつかの主要なSSTシフトは,北太平洋気候変動 (PDO) と一貫しています.
結論:
- Coral Sr/Caは,南太平洋の過去のSSTを再構築するための強力な代理です.
- 南太平洋は,過去3世紀にわたって,実質的な10年間のSST変動を経験しました.
- SSTの変動性の半球対称性は,熱帯の強制が太平洋全域の10年間の気候動態に影響を及ぼす可能性があることを示唆しています.
関連する概念動画
What is Climate?
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.
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.
Temperature Measurement Sites
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Assessing Body Temperature - Temporal Artery
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 forehead...
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 forehead...
Radiation: Applications
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...
The average...
Variation of Atmospheric Pressure
Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...


