[1] Zuerndorfer B,England A W,Dobson M C,et al.Mapping Freeze/Thaw boundaries with SMMR data[J].Journal of Agriculture and Forest Meteorology,1990, 52(1/2): 199-225.
[2] Zuerndorfer B, England A W. Radiobrightness decision criteria for Freeze/Thaw boundaries[J].IEEE Transactions on Geoscience and Remote Sensing,1992, 30(1): 89-102.
[3] Judge J, Galantowicz J F, England A W, et al. Freeze/Thaw classification for prairie soils using SSM/I radio brightnesses[J].IEEE Transactions on Geosicence and Remote Sensing,1997, 35(4): 827-832.
[4] Zhang T, Armstrong R L. Soil freeze/thaw cycles over snow-free land detected by passive microwave remote sensing[J].Geophysical Research Letters, 2001, 28(5): 763-766.
[5] Zhang T, Armstrong R L, Smith J. Investigation of the near-surface soil Freeze-Thaw cycle in the contiguous United States: Algorithm development and validation[J]. Journal of Geophysical Research, 2003, 108(D22): 8 860.
[6] Schmugge T, O′Neill P E, Wang J R. Passive microwave soil moisture research[J].IEEE Transactions on Geoscience and Remote Sensing, 1986, GE-24(1): 12-22.
[7] JacksonT J, Schmugge T J. Passive microwave remote sensing system for soil moisture: Some supporting research[J]. IEEE Transactions on Antennas and Propagation,1989, 27(2): 225-235.
[8] Foster J L, Hall D K, Chang A T C, et al. An overview of passive microwave snow research and results[J].Review of Geophysics and Space Physics,1984, 22(2): 195-208.
[9] Chang A T C, Foster J L, Hall D K. Nimbus-7 SMMR derived global snow cover parameters[J].Allnals of Glaciology,1987, 9: 39-44.
[10] England A W. Radiobrightness of diurnally heated, freezing soil[J].IEEE Transactions on Geoscience and Remote Sensing, 1990, 28(4):464- 476.
[11] Wegmüller U. The effect of freezing and thawing on the microwave signatures of bare soil[J].Remote Sensing of Environment,1990, 33(2): 123-135.
[12] Liou Y, England A W. Annual temperature and radiobrightness signatures for bare soils[J]. IEEE Transactions on Geoscience and Remote Sensing,1996, 34(4): 981-990.
[13] Smith N V, Saatchi S S, Randerson J T. Trends in high northern latitude soil freeze and thaw cycles from 1988 to 2002[J]. Journal of Geophysical Research, 2004, 109: D12101.
[14] Jin R, Li X, Che T. A decision tree algorithm for surface soil freeze/thaw classification over China using SSM/I brightness temperature[J].Remote Sensing of Environment, 2009, 113: 2 651-2 660.
[15] Han L, Tsunekawa  A, Tsubo M. Monitoring near-surface soil freeze-thaw cycles in northern China and Mongolia from 1998 to 2007[J]. International Journal of Applied Earth Observation and Geoinformation,2010,12(5):375-384.
[16] Zhao T, Zhang L, Jiang L, et al. A new soil freeze/thaw discriminant algorithm using AMSR-E passive microwave imagery[J].Hydrological Processes,2011,25:1 704-1 716.
[17] Kim Y, Kimball J S, McDonald K C,et al. Developing a global data record of daily landscape freeze/thaw status using satellite passive microwave remote sensing[J].IEEE Transactions on Geoscience and Remote Sensing,2011,49(3):949-960.
[18] Zhang L X, Zhao T J, Jiang L M, et al. Estimate of phase transition water content in freeze-thaw process using microwave radiometer[J].IEEE Transactions on Geoscience and Remote Sensing,2010, 48(12): 4 248-4 255.
[19] Hoekstra P, Delaney A. Dielectric properties of soils at UHF and microwave frequencies[J].Journal of Geophysical Research,1974,79(11): 1 699-1 708.
[20] Hallikainen M T, Ulaby F T, Dobson M C, et al. Microwave dielectric behavior of wet soil-Part I: Empirical models and experimental observations[J].IEEE Transactions on Geoscience and Remote Sensing,1985, GE-23(1): 25-34.
[21] Zhang L, Shi J, Zhang Z, et al. The estimation of dielectric constant of frozen soil-water mixture at microwave bands[C]∥Proceedings of Geoscience and Remote Sensing Symposium, 2003, 4: 2 903-2 905.
[22] Mironov V L, Dobson M C, Kaupp V H, et al. Generalized refractive mixing dielectric model for moist soils[J].IEEE Transactions on Geoscience and Remote Sensing,2004, 42(4): 773-785.
[23] Li Liying, Zhang Lixin, Zhao Shaojie. Laboratory measurement of the dielectric constant of frozen soil[J].Journal of Beijing Normal University(Natural Science),2007,43(3):241-244.[李丽英, 张立新, 赵少杰. 冻土介电常数的实验研究[J]. 北京师范大学学报：自然科学版, 2007, 43(3): 241-244.]
[24] England A W. Relative influence upon microwave emissivity of fine-scale stratigraphy, internal scattering, and dielectric properties[J].Pure and Applied Geophysics, 1976, 114(2): 287-299.
[25] England A W, Galantowicz J F, Zuerndorfer B W. A volume scattering explanation for the negative spectral gradient of frozen soil[C]∥Proceedings of the IEEE International  Geoscience and Remote Sensing Symposium,1991,3:1 175-1 177.
[26] Liou Y, England A W. A land-surface process/radiobrightness model with coupled heat and moisture transport for freezing soils[J].IEEE Transactions on Geoscience and Remote Sensing,1998,36(2): 669-677.
[27] Schwank M, Stahli M, Wydler H, et al. Microwave L-band emission of freezing soil [J].IEEE Transactions on Geoscience and Remote Sensing,2004,42(6): 1 252-1 261.
[28] Mironov V L, Bobrov P P, Zhirov P V, et al. Radiobrightness dynamics of freezing/thawing processes for different soils[C]∥Proceedings of  the IEEE International  Geoscience and Remote Sensing Symposium, 2006:2 998-3 001.
[29] Zhang Lixin, Zhao Shaojie, Jiang Lingmei. The time series of microwave radiation from representative land surface in the upper reaches of Heihe River during alternation of freezing and thawing[J].Journal of Glaciology and Geocryology, 2009, 31(2): 198-206.[张立新, 赵少杰, 蒋玲梅.冻融交替季节黑河上游代表性地物类型的微波辐射时序特征[J]. 冰川冻土, 2009, 31(2): 198-206.]
[30] Zhao S, Zhang L, Zhang Y, et al. The coherent microwave emission of freezing soil: Experimental research and model simulation[C]∥Proceedings of Geoscience and Remote Sensing Symposium, 2009, 2: 678-681.
[31] Kerr Y H, Waldteufel P, Wigneron J P, et al. The SMOS mission: New tool for monitoring key elements of the global water cycle[J].Proceedings of the IEEE,2010, 98(5): 666-687.
[32] Le Vine D M, Lagerloef G S E, Colomb F R, et al. Aquarius: An instrument to monitor sea surface salinity from space[J].IEEE Transactions on Geoscience and Remote Sensing,2007, 45(7): 2 040-2 050.
[33] Entekhabi D, Njoku E G, O′Neill P E, et al. The Soil Moisture Active Passive (SMAP) mission [J].Proceedings of the IEEE,2010, 98(5): 704-716.