Improving retrievals of soil moisture from active and passive microwave satellites

改进主动和被动微波卫星对土壤湿度的反演

• 批准号: RGPIN-2015-04074
• 负责人: Berg, Aaron
• 金额: $ 2.85万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=687472
• 关键词: Improving; retrievals; soil; moisture; active

In early 2015, the National Aeronautics and Space Administration will launch the Soil Moisture Active Passive satellite platform. Products that will be developed from the data collected from this satellite system will include a global estimate of soil wetness at relatively high spatial resolutions (3x3 kilometres at finest scale). Canadian scientists have great interest in the products from this satellite as observations of soil moisture have been found to be important for improving weather and climate forecasts, detection of drought and to improve the prediction of floods. Efforts to validate the products for various applications over Canada are currently concentrated in agricultural regions. However, knowledge of the soil moisture state is also of great significance to boreal and arctic regions. Numerous processes including permafrost melt, greenhouse gas emissions and forest fires have well established connections to water availability in the root zone. Unfortunately, there is currently a lack of observations in Canada's northern regions where the data from the sensors aboard this satellite can evaluated and potentially improved. The purpose of the proposed research will be to establish networks for the evaluation of the soil moisture products to be released by the SMAP science team over sub-arctic boreal and arctic tundra regions in Canada. Based on these evaluations and detailed site characterization improvements to the soil moisture retrievals over these sites will be developed. **

2015年初，美国国家航空航天局将发射土壤湿度主动被动卫星平台。根据该卫星系统收集的数据开发的产品将包括以相对较高的空间分辨率（最精细尺度为 3x3 公里）对土壤湿度的全球估计。 加拿大科学家对这颗卫星的产品非常感兴趣，因为人们发现土壤湿度观测对于改善天气和气候预报、干旱检测和洪水预测非常重要。目前，验证产品在加拿大各种应用的工作主要集中在农业地区。然而，了解土壤湿度状态对于北方和北极地区也具有重要意义。包括永久冻土融化、温室气体排放和森林火灾在内的许多过程都与根区的水资源供应密切相关。 不幸的是，目前加拿大北部地区缺乏观测数据，无法对这颗卫星上传感器的数据进行评估并可能进行改进。 拟议研究的目的是建立网络，用于评估 SMAP 科学团队在加拿大亚北极北部和北极苔原地区发布的土壤湿度产品。根据这些评估和详细的场地特征，将对这些场地的土壤湿度反演进行改进。 **