Ocean Surface Skin Temperature Measurements using an Optimal Spectral Band

使用最佳光谱带测量海洋表面皮肤温度

• 批准号: 2241269
• 负责人: Andrew Jessup
• 金额: $ 29.94万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2241269&HistoricalAwards=false
• 关键词: Ocean; Surface; Skin; Temperature; Measurements

This project is to develop a novel technique for measuring the ocean skin temperature from a radiometer. Normally skin temperature measurements from radiometers have been made from ships and have required in situ two-point calibration, a separate sky measurement to account for downwelling radiance, and entail uncertainty in the emissivity. The PI is already developing a radiometer that utilizes a single point calibration scheme. This project will leverage the ongoing radiometer development to eliminate the need for a sky measurement and reduce the effect of emissivity uncertainty. The result will be that practical and accurate skin temperature measurements can be made from unmanned surface vehicles and buoys as well as oceanographic research vessels. The availability of accurate skin temperature observations could lead to improved models for near-surface stratification and validation of satellite measurements.This project leverages an ongoing NSF project by the PI to develop the InfraRed In situ Skin Sensing (IRISS) radiometer for the further development of a technique that eliminates the need for separate sky measurements in measuring ocean skin temperature and provides a significant reduction in the effect of emissivity. The technique uses an optimal spectral band in which the reflected sky radiance is from the atmosphere within a 1-2 km of the ship. The combined simplification of a single ambient temperature calibration and no sky measurement will significantly increase the practicality and accessibility of ocean surface skin temperature measurements. As a result it will be possible to make practical and accurate skin temperature measurements from a variety of observation platforms, including USVs, buoys, and ships. The goal is to facilitate skin temperature measurements with accuracies comparable to those currently made from oceanographic research vessels.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

本项目旨在开发一种利用辐射计测量海洋表层温度的新技术。通常情况下，辐射计的皮肤温度测量是在船上进行的，需要现场两点校准，一个单独的天空测量来解释下降的辐射，并带来发射率的不确定性。PI已经在开发一种利用单点校准方案的辐射计。该项目将利用正在进行的辐射计开发，以消除对天空测量的需要，并减少发射率不确定性的影响。其结果是，可以利用无人驾驶的水面航行器和浮标以及海洋研究船进行实际和准确的表面温度测量。准确的皮肤温度观测的可用性可能会导致近地表分层和卫星测量的验证模型的改进。辐射计，以进一步发展一种技术，消除在测量海洋表面温度时对单独天空测量的需要，并大大减少影响辐射率。该技术使用最佳光谱带，其中反射的天空辐射来自船1-2公里范围内的大气。单一的环境温度校准和无天空测量的组合简化将显著增加海洋表面表层温度测量的实用性和可获得性。因此，将有可能从各种观测平台（包括USV、浮标和船舶）进行实用和准确的皮肤温度测量。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。