On the role of the troposphere in satellite altimetry

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 2021

Autores

Fernandes, MJ (Autor) FCUP; Clara Lazaro (Autor) FCUP; Vieira, T (Autor) Outra

Revista

Título: Remote Sensing of Environment

Vol. 252

ISSN: 0034-4257

Editora: Elsevier

Indexação

ISI Web of Knowledge - 23 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-00S-YW5

DOI: 10.1016/j.rse.2020.112149

Abstract (EN): Satellite radar altimetry is nowadays a powerful and attractive Earth Observation technique of major importance in several applications such as the study of mean sea level change (a crucial climate change indicator), the observation of continental ice sheets' melting or the management of highly sensitive coastal zones and continental water resources. This paper aims at presenting an overview of the effects of the troposphere in satellite radar altimetry range observations, i.e. the tropospheric path delays (PD), and the corresponding corrections required to account for these effects, including those due to neutral gases, the DTC (dry tropospheric correction) and those related with water vapour and cloud liquid water content, the WTC (wet tropospheric correction). Starting with a summary of satellite altimeter missions since 1991 and corresponding relevant characteristics for DTC and WTC estimation, the tropospheric PD are discussed in the more general context of the atmospheric corrections. Then, for each of the tropospheric PD, the following topics are inspected and discussed: relevant background theory required to estimate each of the PD; methods used in the PD retrievals either from observations or from atmospheric models; specific problems encountered in the retrieval of each PD in coastal and inland water regions; errors still present in some altimeter products and proposed approaches to mitigate them. Most relevant conclusions are highlighted, including the future challenges and trends in DTC and WTC estimation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 20