Intercomparison of active microwave derived surface status and MODIS land surface temperature at high latitudes

Author

Paulik, C. ; Bartsch, A. ; Sabel, D. ; Wagner, W. ; Duguay, C. ; Soliman, A.

Author_Institution

Inst. of Photogrammetry & Remote Sensing, Vienna Univ. of Technol., Vienna, Austria

fYear

2012

fDate

22-27 July 2012

Firstpage

4598

Lastpage

4601

Abstract

Knowledge about the freeze/thaw state of the surface is of major importance for climate modelling, hydrology and numerous other applications. In this study, a freeze/thaw state detection algorithm using the ASCAT scatterometer is compared to Land Surface Temperature (LST) from MODIS as well as to a product derived from ENVISAT ASAR data. Good agreement with the LST product was found over the study area in Northern Siberia with disagreement below 22% for all 8-day periods of 2007. SAR derived surface status can, if sufficient sampling is available, provide similar results as with ASCAT but even with higher spatial detail.

Keywords

freezing; hydrological techniques; land surface temperature; melting; synthetic aperture radar; ASCAT scatterometer; ENVISAT ASAR data; LST product; MODIS land surface temperature; Northern Siberia; SAR derived surface status; active microwave derived surface status; climate modelling; freeze state detection algorithm; hydrology; thaw state detection algorithm; Land surface; Land surface temperature; MODIS; Radar measurements; Remote sensing; Temperature measurement; Temperature sensors; arctic; hydrology; land surface temperature; radar remote sensing;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International

Conference_Location

Munich

ISSN

2153-6996

Print_ISBN

978-1-4673-1160-1

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2012.6350444

Filename

6350444