全球热带气旋降水量与海面温度的变化
Alyssa M Stansfield1,2, Kevin A Reed1
1School of Marine and Atmospheric Sciences, Stony Brook University, 100 Nicolls Rd, Stony Brook, 11794 NY USA.
概括
热带气旋 (TC) 的降水量
科学领域:
- 气候学 气候学 气候学
- 大气科学 大气科学
- 海洋学 海洋学 海洋学
背景情况:
- 了解热带气旋 (TC) 降水和海面温度 (SST) 对于危险预测和气候变化预测至关重要.
- TC降水受当今SST变化和长期气候变化的影响.
研究的目的:
- 区分和量化表面缩放 (当今变化) 和气候缩放 (长期变化) 对全球TC降水的影响.
- 在当前条件和未来气候场景下,评估TC降水和SST之间的关系.
主要方法:
- 利用了包括观测降水和SST数据在内的多种数据集.
- 采用现实的和理想化的气候模型模拟来分析缩放关系.
- 计算了不同降水指标的明显缩放率和估计的气候缩放率.
主要成果:
- 根据使用的降水度量,TC降水的明显缩放率在每克尔文 (K) 6.1%至9.8%之间变化.
- 估计TC降水的气候缩放率约为5%/K,低于理论大气湿度缩放率约为7%/K (Clausius-Clapeyron缩放).
- 发现明显的缩放率大于气候缩放率.
结论:
- 显而易见的缩放率表明,当前的SST变化关系不应该直接推断,以预测由于气候变化导致的TC降水的长期变化.
- 在气候变化下对TC降水的未来预测需要仔细考虑气候缩放,而不是明显缩放.
相关概念视频
What is Climate?
18.4K
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.
18.4K
Global Climate Change
24.3K
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.
24.3K
The Water Cycle
24.4K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
24.4K
Thermometers and Temperature Scales
5.3K
Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
As many physical properties depend on temperature, the variety of thermometers is...
5.3K
What is Weather?
18.2K
Overview
18.2K
Variation of Atmospheric Pressure
2.2K
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...
2.2K


