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SMOS validation sites: Goulburn & Murrumbidgee Cecilia Azcurra Supervisor: Jeff Walker.

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Presentation on theme: "SMOS validation sites: Goulburn & Murrumbidgee Cecilia Azcurra Supervisor: Jeff Walker."— Presentation transcript:

1 SMOS validation sites: Goulburn & Murrumbidgee Cecilia Azcurra Supervisor: Jeff Walker

2 Background The SMOS satellite will be the first dedicated to the measurement of soil moisture Will measure soil moisture on a 50 x 50 km scale Ground-based measurements to be used for calibration and validation of soil moisture derived from SMOS SMOS validation sites are being identified world-wide Australian validation sites will cover a semi-arid climate

3 SMOS validation There is a discrepancy between the scale of SMOS measurements and that of the ground- based (point) measurements Heterogeneous land cover is an issue Other issues include urban areas and standing water Sampling needs to represent the soil moisture over SMOS-sized pixels How many point measurements are required to obtain the spatial average?

4 The study areas

5 Goulburn catchment

6 Goulburn catchment study area

7 Oct-31 Goulburn catchment data

8

9

10 Yanco region Soil moisture from air measurements Over 11 days 12 Monitoring stations

11 Kyeamba Creek Soil moisture from air measurements Over 3 days Regional sampling 14 Monitoring stations

12 General approach

13 Preliminary results – Goulburn catchment RMSE (regional) = v/v RMSE (monitoring stations) = v/v

14 Preliminary results – Yanco region RMSE = v/v

15 Next steps Regional sampling data For Goulburn catchment Re-sampling to determine the number of samples required to determine the spatial mean Monitoring stations Identify which stations are representative of the area

16

17 Bootstrap sampling - Goulburn catchment Oct-31 Nov-07 Nov-14 Nov-21

18 Preliminary results - Goulburn catchment Soil moisture measurement type From airRegional sampling Monitoring stations (6am to 10am average) Date Soil moisture (% v/v) Soil moisture (% v/v) Error (% v/v) Soil moisture (% v/v) Error (% v/v) 31-Oct Nov Nov Nov

19 Preliminary results - Yanco region AirMonitoring Stations SM (% v/v) Error (% v/v) 31-Oct Nov Nov Nov Nov Nov Nov Nov Nov Nov Nov


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