从1726年到1997年,亚热带南太平洋地区的十年海面温度变化
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.
概括
珊瑚 Sr/Ca 记录显示了 271 年的太平洋海面温度 (SST) 变化. 拉罗通加州的拉罗通加州
科学领域:
- 古气候学 古气候学
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 珊瑚骨包含诸如 (Sr) 和 (Ca) 等元素,其比例对环境条件敏感.
- 了解过去的海面温度 (SST) 变化对于气候建模和预测未来变化至关重要.
- 与其他海洋盆地相比,南太平洋旋转的气候动态不太了解.
研究的目的:
- 重建南太平洋海面温度 (SST) 波动的长期 (271年) 记录.
- 评估珊瑚Sr/Ca比率的可靠性,作为拉罗通加地区SST的代理.
- 为了研究南太平洋十年SST变化和北太平洋气候模式之间的关系.
主要方法:
- 从拉罗通加岛收集了珊瑚核心样本.
- 分析了珊瑚的Sr/Ca比率,使用了已知的地球化学技术.
- 校准的珊瑚Sr/Ca数据与1981-1997年和1950年以来的仪器SST记录 (卫星和船舶) 相比.
- 与太平洋十年振荡指数 (PDO) 进行了比较.
主要成果:
- 珊瑚 Sr/Ca 比率准确地反映了南太平洋的每月和每十年的SST变化.
- 271年的记录 (1726-2000年) 显示了超过0.75°C的显著的十年和十年间SST制度转移.
- 拉罗通加几十年来几个主要的SST转移与北太平洋气候变化 (PDO) 相一致.
结论:
- 珊瑚Sr/Ca是重建过去在南太平洋的SST的一个强大的代理.
- 在过去的三个世纪里,南太平洋经历了相当大的十年SST变化.
- 半球对称性在SST变异性表明热带强迫可能会影响整个太平洋的十年气候动态.
相关概念视频
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...


