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: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633969
• 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式被动卫星平台。将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（最细尺度为3 × 3公里）估算全球土壤湿度。加拿大科学家对这颗卫星的产品非常感兴趣，因为发现土壤湿度观测对改进天气和气候预报、探测干旱和改进洪水预报非常重要。目前，在加拿大各地验证产品的各种应用的工作主要集中在农业地区。然而，了解土壤水分状态对寒带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水的可用性有明确的联系。不幸的是，目前在加拿大北部地区缺乏观测，这颗卫星上的传感器的数据可以进行评估和潜在的改进。拟议研究的目的是建立评价SMAP科学小组将在加拿大亚北极寒带和北极冻土带地区发布的土壤湿度产品的网络。基于这些评价和详细的站点特征，将对这些站点的土壤水分检索进行改进。