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相关概念视频

Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

376
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
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Radiation: Applications01:17

Radiation: Applications

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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.
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相关实验视频

Updated: Jul 12, 2025

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
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遥感算法用于获取全球范围的海面太阳辐射辐射.

Saber Aradpour1, Zhiqiang Deng2

  • 1Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA, USA.

Environmental monitoring and assessment
|October 21, 2023
PubMed
概括
此摘要是机器生成的。

一个新的遥感算法,LSU模型,使用XGBoost.com准确地检索海面太阳辐射 (SR). 它确定了主要的大气和海洋因素,提供全球适用的高分辨率SR数据.

关键词:
遥感是一种远程传感.一个沉没的水槽太阳辐射的强度是多少源头 源头 源头 来源一个XGBoost模型.

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Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data

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相关实验视频

Last Updated: Jul 12, 2025

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Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
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科学领域:

  • 海洋学 海洋学 海洋学
  • 大气科学 大气科学
  • 遥感 遥感 遥感 遥感

背景情况:

  • 准确的海面太阳辐射 (SR) 数据对于各种应用至关重要.
  • 现有的模型可能缺乏准确性或全球适用性.

研究的目的:

  • 开发和验证一种新的遥感 (RS) 算法,用于检索即时的海面太阳辐射 (SR).
  • 确定影响SR的关键因素,并评估模型的全球适用性.

主要方法:

  • 在RStudio中使用XGBoost (XGB) 包进行算法开发.
  • 整合了九个关键的RS参数,包括光合作用可用的辐射 (PAR),瞬间PAR (iPAR),离开水的反射率,斯特罗姆,气溶光学厚度 (aot_869) 和度.
  • 使用可用的RS数据和地面真实太阳辐射数据训练了LSU模型.

主要成果:

  • 在LSU模型中,PAR,iPAR,度和aot_869是最有影响力的参数.
  • 气溶光学厚度 (aot_869) 是主要的大气因素,而 PAR, iPAR 和度是关键的海洋因素.
  • 与现有的SR模型相比,LSU模型显示出更高的精度和更好的分辨率 (1x1公里).

结论:

  • 伦敦大学的模型在科学上是合理的,它结合了主要的SR源和沉没因素.
  • 该模型在技术上是准确的,并且可以在全球范围内用于检索即时的SR数据.
  • 这个算法为在需求时获得全球范围的SR数据提供了一个有价值的工具.