使用众包数据对模拟的城市空气温度进行空间显式校正
Oscar Brousse1, Charles Simpson1, Owain Kenway2
1Institute of Environmental Design and Engineering, University College London, London, United Kingdom.
概括
个人天气传感器 (PWS) 为改善城市气候模型提供了宝贵的数据. 经过质量检查的PWS数据增强了模型评估,并使偏差纠正成为更准确的城市气候影响研究.
科学领域:
- 城市气候学 城市气候学
- 环境建模环境建模
- 数据科学是数据科学.
背景情况:
- 城市气候模型需要强大的观测数据来进行准确的评估.
- 现有的官方气象站在城市地区提供有限的空间覆盖.
- 个人气象传感器 (PWS) 为城市气候研究提供了密集的潜在数据源.
研究的目的:
- 评估质量检查的PWS数据对评估城市气候模型的有用性.
- 为城市空气温度模拟开发和应用一种新的偏差校正方法.
- 提高城市气候模型对影响研究的输出准确度.
主要方法:
- 在伦敦使用天气研究和预报 (WRF) 模型与建筑效应参数化 (BEP-BEM) 模拟近地表空气温度.
- 对402个城市PWS进行模型性能评估,确定异构的酷偏差.
- 采用机器学习方法对模拟的空气温度进行空间显式偏差校正.
主要成果:
- PWS数据揭示了WRF模型模拟中的空间偏差,这些偏差并未被官方气象站捕获.
- 开发的机器学习偏差校正有效地调整了每天的最低,平均和最高温度.
- 偏差校正方法可以解释非线性,空间异质的偏差,独立于城市分数.
结论:
- 经过质量检查的PWS数据对于加强城市气候模型评估至关重要.
- 使用PWS数据进行空间显式偏差校正,显著提高了模型的准确性.
- 为未来的城市气候影响评估推PWS驱动偏差校正框架.
更多相关视频
05:56Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies
Published on: November 6, 2018
8.1K
13:27Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
Published on: June 8, 2015
8.7K
相关概念视频
Temperature Measurement Sites
1.6K
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...
1.6K
Distance Corrections
27
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
27
Random Error
879
Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
879
Selected Data About Geographic Locations
27
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
27
Errors in Global Positioning System
44
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
44
Quantifying Heat
54.4K
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a...
54.4K
