Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute...
-
Upload
suzan-pitts -
Category
Documents
-
view
219 -
download
2
Transcript of Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute...
![Page 1: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/1.jpg)
Detection of Soil Freeze/Thaw Processes
using SMOS and ELBARA-II
Finnish Meteorological Institute (FMI)
K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A. Kontu, J. Ikonen, J. Vehviläinen
![Page 2: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/2.jpg)
SMOSSMOS
ELBARA-IIELBARA-II
![Page 3: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/3.jpg)
ELBARA-II measurements vs frost tube observations
Inc. angle: 50
Snow Snow
Frost Frost
![Page 4: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/4.jpg)
Two winter time-series: ELBARA-II and frost/snow
Winter 2009-10Winter
2009-10
Winter 2010-11Winter
2010-11
Snow Snow
Frost Frost
![Page 5: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/5.jpg)
Two winter time-series: ELBARA-II and frost/snow
Snow Snow
Frost Frost
Freezing period 2009
Freezing period 2009
Freezing period 2010
Freezing period 2010
![Page 6: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/6.jpg)
Two winter time-series: ELBARA-II and frost/snow
Snow Snow
Frost Frost
Early spring 2010
Early spring 2010
Early spring 2011
Early spring 2011
![Page 7: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/7.jpg)
Two winter time-series: ELBARA-II and frost/snow
Snow Snow
Frost Frost
Snow melt-off 2010
Snow melt-off 2010
Snow melt-off 2011
Snow melt-off 2011
![Page 8: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/8.jpg)
Soil freezing and ELBARA-II • Frost depth from frost tube observations (blue circles)
• Triangles: soil freezing state defined using ELBARA-II data
• L-band signal saturates as the soil frost depth reaches ~ 50 cm
![Page 9: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/9.jpg)
Detecting frost using SMOS data• From ELBARA-II to SMOS data
• SMOS incidence angles 50-60 degrees used
• L1C data – H,V polarizations
• Test area: Finland
• Over 2000 smos grid pixels within the area
• Each pixel checked with the Frost algorithm to monitor the soil freezing state
Here used soil frost depths of 10, 20 and 30 cm and no frost
Soil frost maps over Finland
![Page 10: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/10.jpg)
Soil Frost map vs ECMWF surface temperature• Frost information derived from SMOS data
• Surface (2m) temperature (20 day moving average) interpolated from ECMWF 2m temperature observations
Frost map Temperature map
![Page 11: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/11.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 12: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/12.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 13: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/13.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 14: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/14.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 15: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/15.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 16: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/16.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 17: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/17.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 18: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/18.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 19: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/19.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map
![Page 20: Detection of Soil Freeze/Thaw Processes using SMOS and ELBARA-II Finnish Meteorological Institute (FMI) K. Rautiainen, J. Lemmetyinen, J. Pulliainen, A.](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649e0f5503460f94af9f8e/html5/thumbnails/20.jpg)
Soil Frost map vs ECMWF surface temperature
Frost map Temperature map