| Wanneer | 6 september 2018, aanvang 15:30 |
|---|---|
| Waar | Buys Ballotzaal, KNMI |
Speaker Bob Su (University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC), e-mail: z.su@utwente.nl; http://www.itc.nl/WRS
Since 2006 the Tibetan plateau observatory for soil moisture and soil temperature (Tibet-Obs, Su et al., 2011, HESS) has been in operation and has provided valuable dataset for land-atmosphere process studies. The networks and collected data have been used for calibration and validation of satellite soil moisture retrieval algorithms and data products as well as for improving numerical model parameterizations (Su et al., 2013, JGR; Zheng et al., 2015a, b, JHM; 2017a, JHM, b, JGR) and for understanding passive and active microwave signals (Dente et al., 2015, RSE; Wang et al., 2016, JAG; Lv et al., 2014, RSE). Most recently an in-situ microwave radiometer (ELBARA III from ESA) has been operating at the Maqu site of the Tibet-Obs, as such coherent process observation, process modeling and radiative transfer modeling can be conducted (Zheng et al., 2017, TGRS) to examine land-atmosphere interactions. We report here recent results of these experiments in combined radiative transfer and heat-water transfer processes and in understanding SMOS/SMAP observation signals and data products – these are related to a new insight of the penetration depth and its quantification for soil moisture products (Lv et al., 2018), benefit of synergistic use of active and passive microwave observations for soil moisture retrieval (Wang et al., 2018), and inference of subsurface parameters from radiometric observations. A reflection is made on modeling land-atmosphere radiative and heat-water transfer processes as a key component of Earth System Model (Zhao et al., 2018, Lv, et al., 2018).
References
Dente, L., Ferrazzoli, P., Su, Z., van der Velde, R. and Guerriero, L. (2014) Combined use of active and passive microwave satellite data to constrain a discrete scattering model. Remote sensing of environment, 155, 222-238.
Lv, S., Wen, J., Zeng, Y., Tian, H. and Su, Z. (2014) An improved two - layer algorithm for estimating effective soil temperature in microwave radiometry using in situ temperature and soil moisture measurements. Remote sensing of environment, 152, 356-363.
Lv, S., Zeng, Y., Wen, J., Zhao, H., & Su, Z. (2018). Estimation of Penetration Depth from Soil Effective Temperature in Microwave Radiometry. Remote Sensing, 10(4), 519.
Su, Z., de Rosnay, P., Wen, J., Wang, L. and Zeng, Y. (2013) Evaluation of ECMWF's soil moisture analyses using observations on the Tibetan Plateau. J. Geophys. Res.: D: Atmospheres, 118 (11), pp 5304–5318.
Su, Z., Wen, J., Dente, L., van der Velde, R., Wang, L., Ma, Y., Yang, K., and Hu, Z. 2011, The Tibetan Plateau observatory of plateau scale soil moisture and soil temperature (Tibet-Obs) for quantifying uncertainties in coarse resolution satellite and model products, Hydrol. Earth Syst. Sci., 15, 2303–2316, 2011, www.hydrol-earth-syst-sci.net/15/2303/2011/, doi:10.5194/hess-15-2303-2011.
Wang, Q., van der Velde, R., Su, Z. and Wen, J. (2016) Aquarius L-band scatterometer and radiometer observations over a Tibetan Plateau site. Int. J. Appl. Earth Obs. and Geoi., 45, Part B pp. 165-177.
Wang, Q., van der Velde.,R., Ferrazzoli, P., Bai, X., and Su, Z. (2018) Mapping soil moisture across the Tibetan Plateau using Aquarius active and passive L-band microwave observations, ISPRS Photogrametry and remote Sensing (In review).
Yu, L., Y. Zeng, Z. Su, (2018), Liquid-Vapor-Air Flow in the Frozen Soil [Paper #2018JD028502R] (in press).
Zhao, H., Zeng, Y., Lv, S., Su, Z. (2018). Analysis of soil hydraulic and thermal properties for land surface modeling over the Tibetan Plateau. Earth System Science Data, 10(2), 1031.
Zheng, D., et al. "Assessment of Noah land surface model with various runoff parameterizations over a Tibetan river." J.Geophy. Res.: Atmos. 122.3 (2017a): 1488-1504.
Zheng, D., et al. "Evaluation of Noah Frozen Soil Parameterization for Application to a Tibetan Meadow Ecosystem." J. Hydrometeorol. 2017b.
Zheng, D., van der Velde, R., Su, Z., Wang, X., Wen, J., Booij, M.J., Hoekstra, A.Y. and Chen, Y. (2015a) Augmentations to the Noah model physics for application to the Yellow River source area : part I : soil water flow. J. hydrometeorol., 16 (6) 2659–2676.
Zheng, D., van der Velde, R., Su, Z., Wang, X., Wen, J., Booij, M.J., Hoekstra, A.Y. and Chen, Y. (2015b) Augmentations to the Noah model physics for application to the Yellow River source area : part II : turbulent heat fluxes and soil heat transport. J. hydrometeorol., 16 (6) 2677–2694.
Zheng, D., Wang, X., van der Velde, R., Zeng, Y., Wen, J., Wang, Z., ... & Su, Z. (2017). L-Band Microwave Emission of Soil Freeze–Thaw Process in the Third Pole Environment. IEEE Transactions on Geoscience and Remote Sensing, 55(9), 5324-5338.