Working towards a global-scale vegetation water product from SMOS optical depth

Summary, in English

In this study, vegetation optical depth from ESA's Soil Moisture and Ocean Salinity (SMOS) satellite mission is combined with other existing remote sensing, meteorological and literature data in order to obtain values of gravimetric vegetation water content (M_g). The methodology combines an effective medium model valid at passive microwave frequencies with a vegetation dielectric constant model. The algorithm is calibrated for 11 global vegetation classes. The resulting product consists of temporally dynamic ∼25 km global grids of M_g. The first maps clearly show seasonal differences in vegetation water, which vary for the different continental regions due to variations in e.g. latitude, climate and landcover type. This new vegetation water product is unique and offers important complementary information to existing vegetation indices.

• Författare: Jennifer Grant; Jean Pierre Wigneron; Mathew Williams; Marko Scholze; Yann Kerr
• Avdelning/ar: Institutionen för naturgeografi och ekosystemvetenskap
• Publiceringsår: 2014-01-01
• Språk: Engelska
• Sidor: 286-289
• Publikation/Tidskrift/Serie: International Geoscience and Remote Sensing Symposium (IGARSS)
• Länkar: http://dx.doi.org/10.1109/IGARSS.2014.6946413
• Dokumenttyp: Konferensbidrag
• Förlag: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Ämne: Meteorology and Atmospheric Sciences; Climate Research
• Nyckelord: SMOS; vegetation optical depth; vegetation water content
• Conference name: Joint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014
• Conference date: 2014-07-13 - 2014-07-18
• Conference place: Quebec City, Canada
• Status: Published
• ISBN/ISSN/Övrigt: ISBN: 9781479957750